CN1963740A

CN1963740A - Switch apparatus capable of receiving multi-specification signal

Info

Publication number: CN1963740A
Application number: CN 200510115203
Authority: CN
Inventors: 杨建兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-11
Filing date: 2005-11-11
Publication date: 2007-05-16

Abstract

This invention relates to one switch device to receive multiple specimen signals to use common keyboard, mouse cursor, and screen operation for multiple computer or servo host or to use single switch device for simultaneous process or receive digital visual audio intefface and display video graphic array signals. This invention uses restored digital conversion type to process image signal needs to make user can switch the device for different signal end output.

Description

Can receive the switching device shifter of plurality of specifications signal

Technical field

The present invention relates to a kind of switching device shifter, be particularly related to a kind of many group channels (Channel) that have, in same group of channel, can receive/handle the signal of different input specifications simultaneously, and then select the switching device shifter of the signal of one group of channel wherein as the signal of the received plurality of specifications of output signal.

Background technology

Computing machine has become the necessity of people's routine work, and the situation that has many computing machines simultaneously often as seen.A kind of very common computing machine type of service is, a computing machine specialize professional work is used, and does not connect network, does not also use other application software, poisons avoiding, and another computing machine then connects network, is engaged in general work.But, as if furnish two computing machines on desk or desk, respectively dispose the special-purpose peripherals such as keyboard, screen and mouse of a cover simultaneously, and this peripherals can not be shared, then not only the utmost point takes up room, also formation is wasted.Particularly in professional application scenarios such as computer rooms, more common tens of even hundreds of the scenes that computing machine is in one line are compared with individual's application, and this occasion more has the demand of shared peripherals.

Existing on the market so-called KVM device, it is the integrating apparatus of keyboard (Keyboard), display (Video) and mouse (Mouse), can make many main frames share cover keyboard, display and a mouse by the handoff functionality of KVM device, thereby realize the concentrated keyholed back plate of network and system, and then the raising efficiency of management, and realize the target that management, time and space cost effectively reduce simultaneously.

Yet, signal between main frame and the display is connected with two kinds of specifications at present, be VGA (Video Graphic Array, show the drawing array) and DVI (Digital VisualInterface, digital visual interface), wherein, the VGA interface can show 256 looks simultaneously from 262144 kinds of colors, output simulation (ANALOG) signal, DVI directly exports numeral (DIGITAL) signal with video data, and two kinds of interfaces can't directly exchange or compatibility.

In the prior art, the main frame that uses same group of operating means to operate selection is the common trait of all KVM on the market.But although many designs are constantly further proposed, it all has a shortcoming, promptly, no matter be the lead-out terminal that is connected with monitor or monitor the monitor splicing ear that output terminal is connected, be the form of single face with main frame, promptly pure be VGA or pure be the DVI interface.If existing computer system and KVM use the VGA interface, then can't add an any main frame or display that uses the DVI interface, vice versa, the user must use two KVM (one is VGA like this, one is DVI), forming independently shared system separately, thereby cause the increase on the acquisition cost, and the obstacle in the system combination.

In addition, generally selling on the market has so-called DVI-VGA/VGA-DVI adapter, can be required signal specification with conversion of signals by this adapter, though its simple and easy being easy to is used, but will output/input signal significantly be decayed, produce problems such as image distortion.

As previously mentioned, the input end of two kinds of specifications can't be incorporated on the same equipment, replace the epoch rapidly at electronic equipment, when equipment old but can't change for fear of other factors, when the necessary again KVM of the dependence device of user is realized the target of management, time and space cost effective reduction simultaneously, then need to receive the KVM device of unlike signal.

Summary of the invention

An object of the present invention is to provide a kind of reception the/the handle signal of the different input specifications of multichannel (Multi-Channel), and then the signal of selecting one group of channel wherein is as output signal, and output signal can have the switching device shifter of different size.

Another object of the present invention provides a kind of switching device shifter, in described device, the signal of the picture specification of different inputs will become digital mode with answer (Reverse) to be handled, after the switching selective channel, reply the signal specification that (Re-Reverse) becomes specific output once more.So can reduce the loss of signal and the mistake of signal.

Another purpose of the present invention is for the user, provides a kind of effective solution for image output specifications different between new equipment and the old equipment.The user can add computing machine or the server of newly purchasing in the old system, and will total system not change; The radiation that simultaneously can avoid many displays to produce reaches the target of environmental protection machine room.Be more easily, utilize many main frames of KVM switched system, just can between the main frame of a plurality of different operating systems or server, switch by a cover KVM.

The switching device shifter that receives the signal of plurality of specifications of the present invention, utilize keyboard, mouse and many computing machines of screen operator or the servo host shared, it is characterized in that: utilize single switching device shifter can receive/handle the signal of different size, for example signal of DVI and VGA specification simultaneously.The switching device shifter that receives the signal of plurality of specifications of the present invention comprises: the signal input side, the signal input that can provide a plurality of input channels, each channel can receive different size, and described signal is delivered to signal conversion unit handle, it is coupled to the input port of described switching device shifter; The signal outgoing side, the switching signal that output is handled through the leading portion signal input interface can provide the output of different size signal, and it is coupled to the output port of described switching device shifter; Signal conversion unit respectively with signal input side and the coupling of signal outgoing side, becomes conversion of signals digital signal or the digital signal answer is become the particular demands signal; Channel selector couples mutually with the external signal command unit, and passes through the cooperation of multiplexer and interfacing application programs, decides the channel of output signal.

Description of drawings

Fig. 1 is the synoptic diagram of first embodiment of switching device shifter of the present invention.

Fig. 2 is the synoptic diagram of second embodiment of switching device shifter of the present invention.

In the accompanying drawing, the list of parts of each label representative is as follows:

10a～10n input channel

11a～11n VGA input port

12a～12n DVI input port

13a～13n first signal conversion unit

131a～131n ADC

132a～132n TMDS

14 channel selectors

15 secondary signal converting units

151、251 DAC

152、252 TMDS

16 delivery channels

161,261 VGA output ports

162,262 DVI output ports

Embodiment

About technology contents of the present invention, characteristics and effect, in DETAILED DESCRIPTION OF THE PREFERRED, can clearly present below in conjunction with accompanying drawing.

Fig. 1 is a preferred embodiment of the present invention.Usually image is become the signal of different size by different video signal interface conversion, VGA signal and DVI signal as everyone knows, and has a plurality of channels (10a～10n) at the signal input side of this device, (10a～10n) can receive the signal of video signal input of two kinds of different sizes to each channel, i.e. VGA input port (11a～11n) and DVI input port (12～12n).This channel has multiple combination, for example: 2 channel formulas, 4 channel formulas, 8 channel formulas etc.; Wherein, each channel (10a～10n) can an external computing machine or servo host as the input source of signal of video signal, this input source is according to the specification (being VGA or DVI) of computing machine or servo host display card, is linked to preset channel (the corresponding VGA input port of 10a～10n) (11a～11n) or DVI input port (12～12n).After receiving the signal that computing machine or servo host send here, first signal conversion unit (13a～13n) this conversion of signals can be become original TTL signal, (13a～13n) comprises ADC (Analog to Digital Converter to described first signal conversion unit, analog to digital converter) (131a～131n), TMDS (Transition Minimized Differential Signaling, transition minimized differential signaling) (132a～132n), be used for transferring VGA signal and DVI signal to the TTL signal respectively, become common original signal specification.Here, the user is preferably in and only imports a signal source in arbitrary channel, and this channel is with the Auto-Sensing input source, and the user can use various various computing machine signal source outputs with thus.

Channel selector (14) can be mechanical type or electronic type multichannel change-over switch, have a plurality of input ends and an output terminal, described a plurality of input end is electrically connected on signal conversion unit (the TTL signal output part of 13a～13n) of each channel, blocked operation by the user, provide the output of channel to select, the TTL signal that the input signal of video signal of arbitrary channel of input end is converted to is delivered to output terminal.

The signal outgoing side comprises channel (16), and it is the output port of signal, be used for the input channel of input side (one of 10a～10n), through the selected TTL signal output of channel selector (15).Before the output, utilize secondary signal converting unit (15), it is the signal of VGA interface and DVI interface that the TTL signal is replied respectively by DAC (151) and TMDS (152), then described two interface signals are delivered to VGA output port (161) and DVI output port (162) respectively, become the output of different size signal, to provide to the display that connects distinct interface.

Embodiment shown in Figure 2 is slightly different on signal Processing.The front end input interface still is a plurality of channels, and the process of conversion of signals is identical with Fig. 1.But when signal is exported, the TTL signal will be converted to VGA signal (261) specification in DAC (251) mode and be converted to DVI signal (262) specification in TMDS (252) mode individually and handle respectively, and both export respectively.Therefore, this signal processing can be incorporated in the same integrated circuit, also can distinguish independence.

External control device such as keyboard, screen, mouse have been used in the various embodiments described above, obviously, the present invention is by the selected output signal channel of channel selector the time, keyboard, screen, mouse will be shown or controls this computing machine or servo host.

The above is the preferred embodiments of the present invention only, is not to be used for limiting the scope of the present invention.Every equal variation and modification of being done in the present patent application claim includes in claim of the present invention.

Claims

1. switching device shifter that can receive the signal of plurality of specifications, it can make a plurality of main frames share peripherals such as keyboard, mouse and screen, and further, it can receive, handles or export the signal of different size simultaneously, and described device comprises:

A plurality of input channels, each channel can receive the signal of video signal input of at least two kinds of distinct interfaces, and each described input channel comprises:

(i) the first interface image input port;

The (ii) second interface image input port;

(iii) first signal conversion unit, it is electrically connected on the described first and second interface image input ports respectively, can convert the distinct interface signal of video signal by described two input ports input to original image signal respectively;

Channel selector, it has a plurality of input ends and an output terminal, described a plurality of input end is electrically connected on the signal output part of the signal conversion unit of each described channel, and the blocked operation by the user is delivered to output terminal with the original signal that the input signal of video signal of the arbitrary channel of described input end is converted to;

The secondary signal converting unit, it is electrically connected on the output terminal of described channel selector, is converted to the first interface signal of video signal and the second interface signal of video signal with the original image signal with described output terminal output;

Delivery channel, it comprises first interface image output port of the exportable first interface signal of video signal and the second interface image output port of the exportable second interface signal of video signal.

2. switching device shifter as claimed in claim 1, wherein said first interface is the VGA interface.

3. switching device shifter as claimed in claim 1, wherein said second interface is the DVI interface.

4. switching device shifter as claimed in claim 1, wherein said original image signal are the TTL signal.

5. only one of them has signal output for switching device shifter as claimed in claim 1, two output ports of wherein said delivery channel.

6. switching device shifter as claimed in claim 1, two output ports of wherein said delivery channel have signal output simultaneously.