CN101968684B - Multi-computer switch system - Google Patents
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- CN101968684B CN101968684B CN200910160563.6A CN200910160563A CN101968684B CN 101968684 B CN101968684 B CN 101968684B CN 200910160563 A CN200910160563 A CN 200910160563A CN 101968684 B CN101968684 B CN 101968684B
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Abstract
The invention provides a kind of multi-computer switch system, comprise a multi-computer switch and at least one signal process module.This multi-computer switch comprises multiple link, and arbitrary link all can receive or transmit digitized video signal and keyboard/mouse signal.Signal process module comprises the first signal process module in order to host computer is coupled to multi-computer switch, and the second signal process module is in order to be coupled to multi-computer switch by control device.Control device or host computer can be coupled to arbitrary multi-computer switch link by the present invention, make the quantity of the quantity of the control device being coupled to link and host computer make dynamic conditioning.In addition, when at least two multi-computer switch series connection, the host computer that the multi-computer switch that the control device of the multi-computer switch in downstream can manipulate upstream couples.
Description
Technical field
The present invention has about a kind of multi-computer switch system, especially a kind of can the multi-computer switch system of dynamic conditioning host computer and control device number of connection.
Background technology
Refer to Fig. 1, Fig. 1 depicts the multi-computer switch system of known technology.Multi-computer switch system comprise multi-computer switch 100, control device 120,122, multiple first signal process module 130,132,134 and second signal process module 140,142.Multi-computer switch 100 is matrix form (Matrix) multi-computer switch, can manage multiple host computer 110,112,114 respectively for multiple control device 120,122 through several first signal process module (such as 130,132 and 134) and the second signal process module (such as 140 and 142).Wherein, host computer 110,112,114 is coupled to the computer link 150,152,154 of multi-computer switch 100 respectively through the first signal process module 130,132,134.Control device 120,122 is coupled to the control device link 160,162 of multi-computer switch 100 respectively through the second signal process module 140,142.Control device 120,122 respectively has screen, keyboard and mouse.Screen is in order to show the picture of arbitrary host computer 110,112,114.Keyboard and mouse are in order to manipulate arbitrary host computer 110,112,114.
But in known multi-computer switch 100, control device link 160,162 and computer link 150,152,154 are special, namely control device 120,122 can only be coupled to control device link 160 or 162, can not be coupled to computer link 150,152 or 154.On the other hand, host computer 110,112,114 can only be coupled to computer link 150,152 or 154, can not be coupled to control device link 160 or 162.Its reason is in multi-computer switch system, the image signal being sent to multi-computer switch 100 is analog image signal, computer link 150,152,154 can only connect the first signal process module (such as 130,132 and 134), therefore computer link 150,152,154 can only receive the analog image signal from the first signal process module (such as 130,132 and 134), can not transmit analog image signal; Control device link 160,162 can only connect the second signal process module (such as 140 and 142), therefore control device link 160,162 can only transmit analog image signal to the second signal process module (such as 140 and 142), can not receive analog image signal.
In more detail, due in known multi-computer switch 100, the image signal that host computer 110,112,114 exports is analog signal, and this analog image signal arranges suitable transmission path by an image switch 102; On the other hand, the keyboard of control device 120 or mouse signal are digital signal, it is that the analog image signal therefore received by computer link 150,152 or 154 has different transmission paths from the keyboard that control device 120 is sent or mouse signal in multi-computer switch 100 inside by signal controller 104 and other digital circuit to arrange suitable transmission path multi-computer switch 100.And this image switch 102 also cannot affect the transmission path of keyboard or mouse signal, analog image signal also cannot transmit via signal controller 104.
In addition, the quantity of control device link 160 or 162 and the quantity of computer link 150,152 or 154 are fixing, for Fig. 1, the quantity of control device link is 4, the quantity of computer link is 6, and user can not change the quantity of control device link 160 or 162 and the quantity of computer link 150,152 or 154 according to actual demand.
Host computer 110 is manipulated for control device 120, after computer link 150 receives the analog image signal of host computer 110 output through the first signal process module 130, image switch 102 via multi-computer switch 100 switches to the control device link 160 that control device 120 couples, and transmits the screen of this analog image signal to control device 120 by control device link 160 through the second signal process module 140.On the other hand, after control device link 160 receives the keyboard/mouse signal of control device 120 through the second signal process module 140, signal controller 104 via multi-computer switch 100 is sent to the computer link 150 that host computer 110 couples, keyboard/mouse signal is transmitted to host computer 110, to manipulate host computer 110 through the first signal process module 130 by computer link 150.
It is the 5th generic network cable (CAT-5Cable) interface 170 between first signal process module 130 and computer link 150.The schematic diagram of the 5th generic network cable interface 170 of Fig. 1 is depicted referring again to Fig. 2, Fig. 2.5th generic network cable interface 170 has four pairs of twisted-pair feeders, transmits in Fig. 1 with differential signal form, the analog image signal that host computer 110 exports through the first signal process module 130 and the keyboard/mouse signal that control device 120 exports.Analog image signal is Video Graphics Array (VideoGraphicsArray, the VGA) signal comprising R, G, B three primary colours signal, vertical synchronizing signal, horizontal synchronization signal totally five kinds of signals.With in the transmission of differential signal form, transmit in a pair twisted-pair feeder with R+ signal and R-signal after R signal mixes with vertical synchronizing signal, G signal transmits in a pair twisted-pair feeder with G+ signal and G-signal after mixing with test signal, transmits after B signal mixes with horizontal synchronization signal with B+ signal and B-signal in a pair twisted-pair feeder.Keyboard/mouse signal converts universal asynchronous to by the second signal process module 140 of Fig. 1 and receives transmitter (UniversalAsynchronousReceiver/Transmitter, UART) signal, and universal asynchronous receives transmitter signal also with differential signal form, namely U+ signal and U-signal transmit in a pair twisted-pair feeder.The first signal process module 132,134 as Fig. 1 is identical with the 5th generic network cable interface 170 with the interface between multi-computer switch 100, between the second signal process module 140,142 and multi-computer switch 100, therefore repeats no more.
Next another shortcoming of known technology will be described.The object of management is expanded, above-mentioned purpose of multiple stage multi-computer switch can having been connected for reaching multi-computer switch.The mode of multi-computer switch series connection is divided into the mode of stacking (Cascade) and daisy chain fashion (Daisy-Chain) two kinds.Refer to Fig. 3, Fig. 3 depicts the schematic diagram that multi-computer switch connects to stack mode.The mode of stacking is the control device link 360 that the computer link 350 of the first multi-computer switch 300 is connected to the second multi-computer switch 306.First multi-computer switch 300 can be considered main (Master) multi-computer switch or upstream, and the second multi-computer switch 306 can be considered from (Slave) multi-computer switch or downstream (Downstream).Although the control device 320 being coupled to the first multi-computer switch 300 can manipulate the host computer 314 or 316 being coupled to the second multi-computer switch 306, the control device 322 being coupled to the second multi-computer switch 306 can not manipulate the host computer 310 or 312 being coupled to the first multi-computer switch 300.
Refer to Fig. 4, Fig. 4 depicts the schematic diagram that multi-computer switch connects with daisy chain fashion.In connecting with daisy chain fashion, the first multi-computer switch 400 and the second multi-computer switch 406 respectively have and special are connected in series end.First multi-computer switch 400 be connected in series end comprise daisy chain input 480 and daisy chain export the 484, second multi-computer switch 406 be connected in series end comprise for daisy chain input 482 and daisy chain export 486.The daisy chain being the first multi-computer switch 400 with daisy chain fashion connection exports the daisy chain input 482 that 484 are connected to multi-computer switch 406, connect with the stacking type of Fig. 3 and there is identical shortcoming, although the control device 420 being coupled to the first multi-computer switch 400 can manipulate the host computer 414 or 416 being coupled to the second multi-computer switch 406, the control device 422 being coupled to the second multi-computer switch 406 can not manipulate the host computer 410 or 412 being coupled to the first multi-computer switch 400.
In brief, be no matter the series system of Fig. 3 or Fig. 4, the control device of the multi-computer switch in downstream can not manipulate the host computer of the multi-computer switch of upstream, thus limits managerial application.
Summary of the invention
One object of the present invention is to provide a kind of multi-computer switch system, can make the control device of manipulation end or is coupled to arbitrary link of multi-computer switch of this system by the host computer of manipulation end.
Another object of the present invention is to provide a kind of multi-computer switch system, and the control device quantity of the link being coupled to multi-computer switch in system and host computer quantity can be made to make dynamic conditioning.
Another object of the present invention is to provide a kind of multi-computer switch system, when at least two multi-computer switch series connection, the host computer that the control device of the multi-computer switch in downstream can couple through the multi-computer switch of the multi-computer switch manipulation upstream of upstream.
According to multi-computer switch system of the present invention, at least comprise multi-computer switch and at least one signal process module.Multi-computer switch also at least comprises multiple link, and arbitrary link can receive or transmit digitized video signal and keyboard/mouse signal.Signal process module also at least comprises the first signal process module and the second signal process module.First signal process module is in order to be coupled to multi-computer switch by host computer, and host computer exports digitized video signal.Second signal process module is in order to be coupled to multi-computer switch by control device, and control device exports keyboard/mouse signal.When the first signal process module is connected to link for the moment, receives digitized video signal, and keyboard/mouse signal can be transmitted to host computer according to path setting, make control device control host computer.When the second signal process module is connected to link for the moment, receive keyboard/mouse signal, and control device can be sent to according to path setting by digitized video signal or corresponding to the analog image signal of digitized video signal.
According to multi-computer switch system of the present invention, at least comprise multi-computer switch and at least one signal process module.Multi-computer switch also at least comprises multiple link, and arbitrary link can receive or transmit digitized video signal and keyboard/mouse signal.Signal process module also at least comprises the first signal process module and the second signal process module.First signal process module is in order to be coupled to multi-computer switch by host computer, and host computer exports analog image signal.Second signal process module is in order to be coupled to multi-computer switch by control device, and control device exports keyboard/mouse signal.When the first signal process module is connected to link for the moment, receives analog image signal and be converted to digitized video signal, and keyboard/mouse signal can be transmitted to host computer according to path setting, making control device control host computer.When the second signal process module is connected to link for the moment, receive keyboard/mouse signal, and control device can be sent to according to path setting by digitized video signal or corresponding to the analog image signal of digitized video signal.
According to multi-computer switch system of the present invention, at least comprise multi-computer switch and at least one signal process module.Multi-computer switch also at least comprises M computer link and N number of control device link.Computer link is in order to receive digitized video signal.Control device link is in order to receive keyboard/mouse signal.Wherein the quantity (M) of computer link and the quantity (N) of control device link are for variable, and the summation of M and N is a fixed value.Signal process module also at least comprises the first signal process module and the second signal process module.First signal process module is in order to be coupled to multi-computer switch by host computer, and host computer exports digitized video signal.Second signal process module is in order to be coupled to multi-computer switch by control device, and control device exports keyboard/mouse signal.When the first signal process module is connected to computer link for the moment, multi-computer switch can transmit keyboard/mouse signal to host computer according to path setting, makes control device control host computer.When the second signal process module is connected to control device link for the moment, multi-computer switch can be sent to control device according to path setting by digitized video signal or corresponding to the analog image signal of digitized video signal.
According to multi-computer switch system of the present invention, at least comprise the first multi-computer switch, at least one signal process module and the second multi-computer switch.First multi-computer switch also at least comprises multiple link, and arbitrary link can receive or transmit digitized video signal and keyboard/mouse signal.Signal process module also at least comprises the first signal process module and the second signal process module.First signal process module is in order to be coupled to the first multi-computer switch by host computer, and host computer exports digitized video signal.Second signal process module is in order to be coupled to the first multi-computer switch by the first control device, and the first control device exports keyboard/mouse signal.When the first signal process module is connected to link for the moment, receives digitized video signal, and keyboard/mouse signal can be transmitted to host computer according to path setting, make the first control device control host computer.When the second signal process module is connected to link for the moment, receive keyboard/mouse signal, and the first control device can be sent to according to path setting by digitized video signal or corresponding to the analog image signal of digitized video signal.Second multi-computer switch can stack or daisy chain fashion is connected to the first multi-computer switch, using the downstream (downstream) as the first multi-computer switch.The second control device being coupled to the second multi-computer switch can control host computer via the first multi-computer switch.
The present invention the link of multi-computer switch can be made no longer to be restricted to control device link is special or computer link is special, and control device or host computer can be made to be coupled to the link of arbitrary multi-computer switch.Moreover the present invention can make the control device quantity of the link being coupled to multi-computer switch in system and host computer quantity make dynamic conditioning.Finally, when at least two multi-computer switch series connection, the host computer that the multi-computer switch that the control device of the multi-computer switch in downstream can manipulate upstream couples.
For above and other object of the present invention, feature and advantage can be become apparent, coordinate accompanying drawing, be described in detail below:
Accompanying drawing explanation
Fig. 1 depicts the multi-computer switch system of known technology;
Fig. 2 depicts the schematic diagram of the 5th generic network cable interface of Fig. 1;
Fig. 3 depicts the schematic diagram that multi-computer switch connects to stack mode;
Fig. 4 depicts the schematic diagram that multi-computer switch connects with daisy chain fashion;
Fig. 5 depicts the first embodiment of multi-computer switch system of the present invention;
Fig. 6 A depicts the type of the constrained input signal of the first signal process module in Fig. 5;
Fig. 6 B depicts the type of the constrained input signal of the second signal process module in Fig. 5;
Fig. 6 C depicts the functional block diagram of the first signal process module internal of Fig. 6 A;
Fig. 6 D depicts the functional block diagram of the second signal process module internal of Fig. 6 B;
Fig. 6 E depicts the first selection circuit in the present invention and exports, in conjunction with the oscillogram of analog image signal R (or G or B) with the R/T signal of test signal T;
Fig. 6 F depicts the converter that in the present invention, single-ended slip is dynamic and exports, in conjunction with the oscillogram of the differential form signal R/T+V signal of analog image signal R (or G or B), test signal T and vertical synchronizing signal V;
Fig. 7 depicts the second embodiment of multi-computer switch system of the present invention; And
Fig. 8 depicts the 3rd embodiment of multi-computer switch system of the present invention.
Main element symbol description
11A first selection circuit
11B second selection circuit
13 signal generators
14 single-endedly turn differential translator
15 first processors
15A universal serial bus device controller
16,29RJ45 connector
17 the one RS485 transceivers
18 first universal serial bus concentrators
21,23 differentially turn single-ended converter
22 the 3rd selection circuits
26 second universal serial bus concentrators
27 the 2nd RS485 transceivers
28 second processors
28A USB host controller
100,500 multi-computer switch
102 image switchs
104,504 signal controllers
106 digitized video signals
107,124 output signals
The signal of 108 keyboard/mouse operations
109 analog image signals
110,112,114,310,312,314,316,410,412,414,416,510,512,514,710,712,714,716,810,812,814,816 host computers
120,122,320,322,420,422,520,522 control devices
130,132,134,530,532,534,730,732,734,736,830,832,834,836 first signal process modules
140,142,540,542,740,742,840,842 second signal process modules
150,152,154,350 computer links
160,162,360 control device links
170,570,572 the 5th generic network cable interfaces
300,400,700,800 first multi-computer switch
306,406,706,806 second multi-computer switch
480,482 daisy chain inputs
484,486 daisy chain export
502 link up unit
550,552,554,556,558 links
574 operating systems
576 drivers
590,594 Video Graphics Array interfaces
592,596 USB (universal serial bus) row interfaces
597 digitized video interfaces
600,610 daisy chain series sides
720,820 first control devices
722,822 second control devices
T tests signal
Embodiment
Refer to Fig. 5, Fig. 5 depicts the first embodiment of multi-computer switch system of the present invention.Multi-computer switch system comprises multi-computer switch 500, first signal process module 530,532,534 and second signal process module 540,542.Multi-computer switch 500 comprises multiple link 550,552,554,556,558, arbitrary link 550,552,554,556,558 can receive or transmit digitized video signal and keyboard/mouse signal, only can unidirectional reception or one-way transmission signal unlike prior art.Host computer 510,512,514 is coupled to multi-computer switch 500 by the first signal process module 530,532,534 respectively, host computer 510,512,514 exportable analog image signal or digitized video signal, will in having more detailed explanation after a while as output analog image signal or digitized video signal.Control device 520,522 is coupled to multi-computer switch 500 by the second signal process module 540,542 respectively, and control device 520,522 is in order to export keyboard/mouse signal.
Due to link 550,552,554,556,558 energy transmitted in both directions signal, therefore can couple for arbitrary control device 520,522 or arbitrary host computer 510,512,514.Host computer 510 is manipulated for control device 520, when the first signal process module 530 is connected to link 550, first signal process module 530 receives the digitized video signal that host computer 510 exports, or receive the analog image signal of host computer 510 output and be converted to digitized video signal, according to a path setting, this digitized video signal is sent to the screen of control device 520 via link 556 and the second signal process module 540, and transmit keyboard/mouse signal to host computer 510 via link 550, make control device 520 can control host computer 510.
When the second signal process module 540 is connected to link 556, second signal process module 540 receives the keyboard/mouse signal of control device 520, and the digitized video signal that can be exported by multi-computer switch 500 according to path setting is sent to control device 520, or be resent to control device 520 after digitized video signal is converted to analog image signal.
Multi-computer switch system also comprises user's interface for carrying out above-mentioned path setting, wherein user's interface such as can at the screen menu (On-ScreenDisplay of the screen display of control device 520, OSD), the transfer path of keyboard/mouse signal and digitized video signal can be set by screen menu.Or this user's interface comprises keyboard or the mouse of control device, via hot key (HotKey) function or the rolling mouse of keyboard, user can carry out this path setting.
Multi-computer switch 500 comprises links up unit 502 and signal controller 504.Link up unit and be connected to link 550,552,554,556,558, what be connected to one of link 550,552,554,556,558 in order to identification is the first signal process module 530,532,534 or second signal process module 540,542.In one embodiment of this invention, when the first signal process module 530 is connected to link 550, link up unit 502 by sending signal to the first signal process module 530, and receive the response of the first signal process module 530, pick out the first signal process module 530 and be connected to link 550.When the second signal process module 540 is connected to link 556, links up the signal that unit 502 sends by reception second signal process module, and when responding the second signal process module 540, pick out the second signal process module 540 and be connected to link 556.In one embodiment of this invention, this links up unit 502 and can be a central processing unit, and its suitable firmware program code of arranging in pairs or groups just can complete above-mentioned identification.In addition, signal controller 504 is in order to the transmission of supervisory keyboard/mouse signal.
In Figure 5, link 550,552,554 is coupled to host computer 510,512,514, therefore industry is often called computer link, and link 556,558 is coupled to control device 520,522, is often called as control device link.Can transmit due to arbitrary link of the present invention or receive digitized video signal, therefore arbitrary link both can be used as computer link, also can be used as control device link, was not limited to them.Therefore the quantity (M) of computer link and the quantity (N) of control device link are for variable, and the summation of M and N is a fixed value, and this fixed value is the link quantity that multi-computer switch 500 has.With the embodiment of Fig. 5, link quantity has 10, wherein 3 as computer link, 2 as control device link, 5 not yet use.The present invention can according to the quantity of the quantity of demand dynamic conditioning computer link and control device link, for example, 10 links can be divided into 2 control device links and 8 computer links to use, when needs increase control device, 3 control device links and 7 computer links can be divided into use or 4 control device links and 6 computer links use, significantly increase systematic difference.
Below will introduce in Fig. 5, the process of host computer 510, first signal process module 530, multi-computer switch 500, second signal process module 540 and control device 520 signal transmission and process.Refer to Fig. 6 A, Fig. 6 A depicts the type of the constrained input signal of the first signal process module 530 in Fig. 5.In fig. 6, connect with Video Graphics Array (VGA) interface 590 and USB (universal serial bus) (USB) interface 592 between the first signal process module 530 and host computer 510, and be the 5th generic network cable (CAT-5) interface 570 between the first signal process module 530 and multi-computer switch 500.
First signal process module 530 receives the digitized video signal of host computer 510 through USB (universal serial bus) (USB) interface 592 and receives the analog image signal of host computer 510 through Video Graphics Array (VGA) interface 590.Host computer 510 has operating system 574, and driver 576 is installed in the operating system 574 of host computer 510, exports digitized video signal to make host computer 510.
Driver 576 can be stored in a computer-readable and write media (not shown), such as: the laser disc in CD-ROM device or other Storage Medias, or the network connected by host computer 510 be installed on again in operating system 574 after the servomechanism of product manufacturing manufacturer of the present invention is downloaded and also can.Driver 576 can be set as being activated when the operating system 574 of host computer 510 starts, and exports digitized video signal to make host computer 510.
After the first signal process module 530 to receive the digitized video signal of host computer 510 through USB (universal serial bus) (USB) interface 592, digitized video signal can be sent to multi-computer switch 500.After the first signal process module 530 to receive the analog image signal of host computer 510 through Video Graphics Array (VGA) interface 590, after analog image signal being converted to digitized video signal, be resent to multi-computer switch 500.In brief, no matter host computer 510 exports analog image signal or digitized video signal, and what multi-computer switch received is all digitized video signal.
Before the operating system 574 of host computer 510 starts, when namely host computer 510 is under BIOS pattern, the first signal process module 530 still can provide analog image signal to multi-computer switch 500.After operating system 574 starts, as previously mentioned, driver 576 also can be utilized to switch in the output intercropping of digitized video signal and analog image signal.
Refer to Fig. 6 B, Fig. 6 B depicts the type of the constrained input signal of the second signal process module 540 in Fig. 5.In fig. 6b, connect with the 5th generic network cable (CAT-5) interface 572 between multi-computer switch 500 and the second signal process module 540, and connect with Video Graphics Array (VGA) interface 594 and USB (universal serial bus) (USB) interface 596 between the second signal process module 540 and control device 520.
After multi-computer switch 500 transmits digitized video signal to the second signal process module 540, digitized video signal can be sent to control device 520 by the second signal process module 540, or is resent to control device 520 to show after digitized video signal is converted to analog image signal.The control signal of control device 520, namely keyboard/mouse signal can through USB (universal serial bus) (USB) interface 596 or other suitable interfaces (such as PS/2 interface), second signal process module 540, 5th generic network cable (CAT-5) interface 572 is sent to multi-computer switch 500, again as shown in Figure 6A, by multi-computer switch 500 according to a path setting through the 5th generic network cable (CAT-5) interface 570, first signal process module 530, USB (universal serial bus) (USB) interface 592 or other suitable interfaces (such as PS/2 interface) are sent to host computer 510.
In Fig. 5 the signal transmission of host computer 512,514 and processing procedure identical with host computer 510, the signal transmission of control device 522 and processing procedure identical with control device 520, so repeat no more.
Refer to Fig. 6 C, Fig. 6 C depicts the functional block diagram of first signal process module 530 inside of Fig. 6 A.The first signal process module 532,534 of Fig. 5 has the functional block diagram identical with the first signal process module 530.In more detail, each first signal process module (such as 530) all also mainly comprises the first selection circuit 11A, the second selection circuit 11B, a signal generator 13, single-endedly turns differential translator 14, first processor 15, RJ45 connector 16, RS485 transceiver 17, USB (universal serial bus) (USB) interface 592, Video Graphics Array (VGA) interface 590 and one the 5th generic network cable (CAT-5) interface 570.As previously mentioned, the exportable analog image signal 109 of host computer 510 or digitized video signal 106 is sent to the second selection circuit 11B via USB (universal serial bus) (USB) interface 592.Sync signal in this analog image 109 comprises horizontal synchronization signal H and vertical synchronizing signal V, and this sync signal comprises horizontal synchronization signal H and vertical synchronizing signal V and can be compound (Composite) form or non-composite form.
When host computer 510 exports an analog image signal 109 via Video Graphics Array (VGA) interface 590, this signal generator 13 can produce a test signal T (being such as the pulse wave of a 2M hertz), after this purposes of testing signal T will be illustrated in.The composition R (or G or B) of the analog image signal 109 that this test signal T and computer export is input to the first selection circuit 11A, then under the control of the first processor 15 of the first signal process module 530, selectivity output is carried out by the first selection circuit 11A, the output signal 124 of this first selection circuit 11A has three groups of signals, comprise R/T, G/T and B/T, wherein the oscillogram of R/T as illustrated in fig. 6e.In this embodiment, this first selection circuit 11A can be three groups of alternative multiplexers (Multiplexer) and formed.In another embodiment, also this signal generator 13 and the first selection circuit 11A can be omitted, analog image signal R, G, B that host computer 510 is exported are directly inputted into and single-endedly turn differential translator 14.
Five groups of signals such as the horizontal synchronization signal H that the output 124 (R/T, G/T, B/T) of this first selection circuit 11A and host computer 510 export and vertical synchronizing signal V are all input to the single-ended differential translator 14 that turns, turn the mixing of differential translator 14 through single-ended and export the second selection circuit 11B to after changing, this single-ended output signal 107 turning differential translator 14 has three groups, is denoted as R/T+V, G/T+H and B/T respectively.Wherein the oscillogram of R/T+V is the signal (signal of positive ends and negative polarity end is symmetrical each other) of a differential form as fig 6 f illustrates, it is as an exemplary illustrated, the people that the art has usual knowledge thus also can understand single-ended turn differential translator 14 the waveform of output G/T+H and B/T, therefore to repeat no more.This single-ended differential translator 14 that turns realized primarily of operational amplifier.
This second selection circuit 11B is connected to RJ45 connector 16, this RJ45 connector 16 is connected to the cable of one the 5th generic network cable (CAT-5) interface 570 again, can have four pairs of twisted-pair feeders when this cable is the 5th generic network cable (CAT-5) cable.In this embodiment, this second selection circuit 11B can be multiplexer (multiplexer) and realized.When host computer 510 exports analog image signal 109, three groups of signals R/T+V, G/T+H and B/T that second selection circuit 11B exports can be loaded on wherein three pairs of twisted-pair feeders of the 5th generic network cable (CAT-5) interface 570, are then received by the second signal process module 540 of the other end.
When host computer 510 holds output one digitized video via one USB (universal serial bus) (USB), the digitized video signal 106 representing this digitized video can input the first USB (universal serial bus) (USB) hub 18 of so far the first signal process module 530 via USB (universal serial bus) (USB) interface 592 (such as a USB (universal serial bus) (USB) connector).This first USB (universal serial bus) (USB) hub 18 has two downstream end, wherein a downstream end is connected to the second selection circuit 11B, another downstream end is then connected to USB (universal serial bus) (USB) Setup Controller 15A, and this Setup Controller 15A can be a part for first processor 15.This digitized video signal 106 exports the second selection circuit 11B to through a downstream end of the first USB (universal serial bus) (USB) hub 18 thus again, is then also output on wherein a pair twisted-pair feeder of the cable of RJ45 connector 16 and the 5th generic network cable (CAT-5) interface 570.This digitized video signal 106 can be loaded on wherein a pair twisted-pair feeder of the 5th generic network cable (CAT-5) interface 570 afterwards, is then received by the second signal process module 540 of the other end.
This first processor 15 is also received by a pair twisted-pair feeder of the cable of the 5th generic network cable (CAT-5) interface 570 and processes the signal from a RS485 transceiver 17, the signal 108 that the representative keyboard/mouse such as transmitted by the second signal process module 540 operates.Then the signal 108 that this is represented keyboard/mouse operation by this first processor 15 again resolve and process after through being sent to host computer 510 by the first USB (universal serial bus) (USB) hub 18 and USB (universal serial bus) (USB) interface 592 (such as a USB (universal serial bus) (USB) connector).So, just host computer 510 can be controlled at the keyboard of the other end and mouse.This RS485 transceiver also can be replaced by the transceiver of other kinds, such as an Ethernet (ether) transceiver.This first processor 15 also controls above-mentioned signal generator 13 and single-endedly turns differential translator 14.
Refer to Fig. 6 D, Fig. 6 D depicts the functional block diagram of second signal process module 540 inside of Fig. 6 B.The second signal process module 542 of Fig. 5 has the functional block diagram identical with the second signal process module 540.In more detail, each second signal process module (such as 540) also mainly comprises the 3rd selection circuit 22, differentially turns single-ended converter 21,23, second processor 28, RJ45 connector 29, the 2nd RS485 transceiver 27, USB (universal serial bus) (USB) interface 596, Video Graphics Array (VGA) interface 594, digitized video interface 597 and one the 5th generic network cable (CAT-5) interface 572.
When the host computer 510 of Fig. 6 C exports analog image, via the arrangement path of the multi-computer switch 500 of Fig. 5, the second signal process module 540 can receive analog image related signal R/T+V, G/T+H and B/T from the first signal process module 530 or R+V, G+H and B (when signal generator 13 is omitted) by wherein three pairs of twisted-pair feeders and the RJ45 connector 29 of the cable of the 5th generic network cable (CAT-5) interface 572.These analog image related signal R/T+V, G/T+H and B/T or R+V, G+H and B are the signal of differential form, and it can turn via differential the screen exporting control device 520 after single-ended converter 21,23 is reduced into single-ended analog image signal R, G, B and vertical synchronizing signal V and horizontal synchronization signal H respectively respectively to respectively.The art has and usually knows that the knowledgeable can understand the differential running or the transfer principle that turn single-ended converter 21,23 thus, therefore does not repeat them here.
When the host computer 510 of Fig. 6 C exports digitized video, second signal process module 540 can via wherein a pair twisted-pair feeder of the cable of the 5th generic network cable (CAT-5) interface 572 and RJ45 connector 29 receive the first signal process module 530 export the digitized video signal 106 (Fig. 6 C) representing this digitized video, because this digitized video signal 106 is loaded on certain a pair twisted-pair feeder of the cable of the 5th generic network cable (CAT-5) interface 572, so digitized video interface 597 can be directed to via the 3rd selection circuit 22, then the screen of control device 520 is exported to.
On the other hand, in one embodiment of this invention, the keyboard of control device 520 or mouse are USB (universal serial bus) (USB) interface form, therefore the instruction or the signal that represent keyboard or mouse action can via the second USB (universal serial bus) (USB) hubs 26, second processor 28 (optionally comprising a USB (universal serial bus) (USB) console controller 28A), 2nd RS485 transceiver 27, the cable of RJ45 connector 29 and the 5th generic network cable (CAT-5) interface 572 is sent to the first signal process module 530 of the other end to control host computer 510.The art has and usually knows that the knowledgeable can understand running herein or transfer principle thus, therefore does not repeat them here.
Due to R, G, B signal is by the cable of the first signal process module 530 and the 5th generic network cable (CAT-5) interface 570, the phase differential (PhaseDifference) when degree may be produced to each other after the cable of the 5th generic network cable (CAT-5) interface 572 is sent to the second signal process module 540, it can cause the image of screen correctly to show, therefore the second signal process module 540 can according to being entrained in R, G, test signal T in B signal detects that the amount of phase differential is also according to this by R, G, the adjusting offset to zero of B signal or close to zero.On the other hand, the sync signal exported due to host computer 510 can have multiple different kind or combination, therefore the single-ended output signal 107 turning differential translator 14 of Fig. 6 C is not limited to above-mentioned aspect, also can be waveform or the combination of other kinds.
Refer to Fig. 7, Fig. 7 depicts the second embodiment of multi-computer switch system of the present invention.This embodiment is to stack the interconnective schematic diagram of (Cascade) mode between two multi-computer switch.Multi-computer switch system comprises the first multi-computer switch 700, second multi-computer switch 706, first signal process module 730,732,734,736 and second signal process module 740,742.First multi-computer switch 700 and the second multi-computer switch 706 are interconnected via link each other.First multi-computer switch 700 and the second multi-computer switch 706 have identical function with the multi-computer switch 500 of Fig. 5, therefore repeat no more.Host computer 710,712 is coupled to the first multi-computer switch 700, first signal process module 734,736 and respectively host computer 714,716 is coupled to the second multi-computer switch 706 by the first signal process module 730,732 respectively.Second signal process module 740 is in order to be coupled to the first multi-computer switch 700 by the first control device 720.Second multi-computer switch 706 is connected to the first multi-computer switch 700 to stack mode, using the downstream as the first multi-computer switch 700, because the link of the first multi-computer switch 700 and the link of the second multi-computer switch 706 can transmit or receive digitized video signal, the second control device 722 being therefore coupled to the second multi-computer switch 706 can control host computer 710 or 712 via the first multi-computer switch 700.
Refer to Fig. 8, Fig. 8 depicts the 3rd embodiment of multi-computer switch system of the present invention.This embodiment is the schematic diagram that multi-computer switch connects in daisy chain (Daisy-Chain) mode.Multi-computer switch system comprises the first multi-computer switch 800, second multi-computer switch 806, first signal process module 830,832,834,836 and second signal process module 840,842.First multi-computer switch 800 and the second multi-computer switch 806 are interconnected via daisy chain series side 600 and 610 each other.First multi-computer switch 800 and the second multi-computer switch 806 have identical function with the multi-computer switch 500 of Fig. 5, therefore repeat no more.Host computer 810,812 is coupled to the first multi-computer switch 800, first signal process module 834,836 and respectively host computer 814,816 is coupled to the second multi-computer switch 806 by the first signal process module 830,832 respectively.Second signal process module 840 is in order to be coupled to the first multi-computer switch 800 by the first control device 820.Second multi-computer switch 806 is connected to the first multi-computer switch 800 with daisy chain fashion, using the downstream as the first multi-computer switch 800, because the link of the first multi-computer switch 800 and the link of the second multi-computer switch 806 can transmit or receive digitized video signal, the second control device 822 being therefore coupled to the second multi-computer switch 806 can control host computer 810 or 812 via the first multi-computer switch 800.
To sum up, it is no matter the series system of Fig. 7 or Fig. 8, not only the control device of upstream multi-computer switch can manipulate the host computer of downstream multi-computer switch, and the control device of downstream multi-computer switch also can manipulate the host computer of upstream multi-computer switch, increases managerial convenience.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention; any there is the technical field of the invention usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing various change and retouching; and can think to carry other different embodiments, therefore protection scope of the present invention when depending on after attached claim define and be as the criterion.
Claims (10)
1. a multi-computer switch system, at least comprises a multi-computer switch and at least one signal process module, wherein:
This multi-computer switch also at least comprises:
Multiple link, arbitrary link can receive or transmit a digitized video signal and a keyboard/mouse signal; And
This at least one signal process module also at least comprises the first signal process module and the second signal process module, wherein:
This first signal process module, in order to a host computer is coupled to this multi-computer switch, have one the 5th generic network cable interface between this first signal process module and this multi-computer switch, this host computer exports this digitized video signal; And
This second signal process module, in order to a control device is coupled to this multi-computer switch, have one the 5th generic network cable interface between this second signal process module and this multi-computer switch, this control device exports this keyboard/mouse signal,
Wherein when this first signal process module is connected to those links for the moment, receive this digitized video signal, and this keyboard/mouse signal can be transmitted to this host computer according to a path setting, make this control device can control this host computer,
When this second signal process module is connected to those links for the moment, receive this keyboard/mouse signal, and this control device can be sent to according to this path setting by this digitized video signal or corresponding to an analog image signal of this digitized video signal.
2. multi-computer switch system as claimed in claim 1, it is characterized in that, this multi-computer switch can pick out this first signal process module or this second signal process module is connected to one of those links.
3. multi-computer switch system as claimed in claim 2, it is characterized in that, also at least comprise a communication unit and be connected to those links, wherein this communication unit is by sending a signal and receiving response, pick out this first signal process module and be connected to one of those links, this communication unit, by receiving this signal and responding, picks out this second signal process module and is connected to one of those links.
4. multi-computer switch system as claimed in claim 1, it is characterized in that, this digitized video signal is converted to this analog image signal by this second signal process module.
5. a multi-computer switch system, at least comprises a multi-computer switch and at least one signal process module, wherein:
This multi-computer switch also at least comprises:
Multiple link, arbitrary link can receive or transmit a digitized video signal and a keyboard/mouse signal; And
This at least one signal process module also at least comprises the first signal process module and the second signal process module, wherein:
This first signal process module, in order to a host computer is coupled to this multi-computer switch, have one the 5th generic network cable interface between this first signal process module and this multi-computer switch, this host computer exports an analog image signal; And
This second signal process module, in order to a control device is coupled to this multi-computer switch, have one the 5th generic network cable interface between this second signal process module and this multi-computer switch, this control device exports this keyboard/mouse signal,
Wherein when this first signal process module is connected to those links for the moment, receive this analog image signal and be converted to this digitized video signal, and this keyboard/mouse signal can be transmitted to this host computer according to a path setting, make this control device can control this host computer
When this second signal process module is connected to those links for the moment, receive this keyboard/mouse signal, and this control device can be sent to according to this path setting by this digitized video signal or corresponding to this analog image signal of this digitized video signal.
6. multi-computer switch system as claimed in claim 5, it is characterized in that, this multi-computer switch can pick out this first signal process module or this second signal process module is connected to one of those links.
7. multi-computer switch system as claimed in claim 5, it is characterized in that, also at least comprise a communication unit and be connected to those links, wherein this communication unit is by sending a signal and receiving response, pick out this first signal process module and be connected to one of those links, this communication unit is by receiving this signal and responding, and this second signal process module of identification system is connected to one of those links.
8. a multi-computer switch system, at least comprises a multi-computer switch and at least one signal process module:
This multi-computer switch also at least comprises M computer link and N number of control device link, wherein:
This M computer link, in order to receive a digitized video signal; And
This N number of control device link, in order to receive a keyboard/mouse signal,
Wherein the quantity M of this computer link and the quantity N of this control device link is variable, and the summation of M and N is a fixed value; And
This at least one signal process module also at least comprises the first signal process module and the second signal process module, wherein:
This first signal process module, in order to a host computer is coupled to this multi-computer switch, have one the 5th generic network cable interface between this first signal process module and this multi-computer switch, this host computer exports this digitized video signal; And
This second signal process module, in order to a control device is coupled to this multi-computer switch, have one the 5th generic network cable interface between this second signal process module and this multi-computer switch, this control device exports this keyboard/mouse signal;
Wherein when this first signal process module is connected to those computer links for the moment, this multi-computer switch can transmit this keyboard/mouse signal to this host computer according to a path setting, makes this control device can control this host computer,
When this second signal process module is connected to those control device links for the moment, this multi-computer switch can be sent to this control device according to this path setting by this digitized video signal or corresponding to an analog image signal of this digitized video signal.
9. multi-computer switch system as claimed in claim 8, it is characterized in that, this digitized video signal is converted to this analog image signal by this second signal process module.
10. a multi-computer switch system, at least comprises the first multi-computer switch, at least one signal process module, the second multi-computer switch, wherein:
This first multi-computer switch also at least comprises:
Multiple link, arbitrary link can receive or transmit a digitized video signal and a keyboard/mouse signal;
This at least one signal process module also at least comprises the first signal process module and the second signal process module, wherein:
This first signal process module is in order to be coupled to this first multi-computer switch by a host computer, and have one the 5th generic network cable interface between this first signal process module and this first multi-computer switch, this host computer exports this digitized video signal; And
This second signal process module is in order to be coupled to this first multi-computer switch by the first control device, there is between this second signal process module and this first multi-computer switch one the 5th generic network cable interface, this first control device exports this keyboard/mouse signal
Wherein when this first signal process module is connected to those links for the moment, receive this digitized video signal, and this keyboard/mouse signal can be transmitted to this host computer according to a path setting, make this first control device can control this host computer,
When this second signal process module is connected to those links for the moment, receive this keyboard/mouse signal, and this first control device can be sent to according to this path setting by this digitized video signal or corresponding to an analog image signal of this digitized video signal; And
This second multi-computer switch can stack or daisy chain fashion is connected to this first multi-computer switch, using the downstream as this first multi-computer switch,
The second control device being wherein coupled to this second multi-computer switch can control this host computer via this first multi-computer switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160563.6A CN101968684B (en) | 2009-07-28 | 2009-07-28 | Multi-computer switch system |
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| CN200910160563.6A CN101968684B (en) | 2009-07-28 | 2009-07-28 | Multi-computer switch system |
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| CN101968684A CN101968684A (en) | 2011-02-09 |
| CN101968684B true CN101968684B (en) | 2015-12-16 |
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| CN105204662A (en) * | 2015-10-29 | 2015-12-30 | 广州辉远电子技术有限公司 | Method for controlling display of multi terminals |
| CN107018368A (en) * | 2017-04-11 | 2017-08-04 | 惠科股份有限公司 | Switch long-range control method and system |
Citations (3)
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|---|---|---|---|---|
| CN2816907Y (en) * | 2005-03-11 | 2006-09-13 | 北京中科大洋科技发展股份有限公司 | Video/audio frequency input output interfacing card |
| CN2876893Y (en) * | 2006-02-24 | 2007-03-07 | 环达电脑(上海)有限公司 | High grade digital display interface converting card device for computer |
| CN101030128A (en) * | 2006-02-28 | 2007-09-05 | 宏正自动科技股份有限公司 | Kvm switch and a computer switching method |
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2009
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2816907Y (en) * | 2005-03-11 | 2006-09-13 | 北京中科大洋科技发展股份有限公司 | Video/audio frequency input output interfacing card |
| CN2876893Y (en) * | 2006-02-24 | 2007-03-07 | 环达电脑(上海)有限公司 | High grade digital display interface converting card device for computer |
| CN101030128A (en) * | 2006-02-28 | 2007-09-05 | 宏正自动科技股份有限公司 | Kvm switch and a computer switching method |
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