CN207067943U

CN207067943U - A kind of device that the switching of KVM switcher flicker free is realized based on FPGA

Info

Publication number: CN207067943U
Application number: CN201720864314.5U
Authority: CN
Inventors: 聂红伟; 曲鸣; 刘培邦; 鲁星言; 祈蔚; 尹继超; 张才科; 王丹; 李飞
Original assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Current assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Priority date: 2017-07-17
Filing date: 2017-07-17
Publication date: 2018-03-02
Anticipated expiration: 2027-07-17

Abstract

The utility model discloses a kind of device that the switching of KVM switcher flicker free is realized based on FPGA, it is related to electronic equipment manufacturing field, including the host computer, FPGA and display being sequentially connected with, described device also includes switch controller, some decoders and some memories, the memory is connected with FPGA, and the decoder is connected by switch controller with FPGA.Memory of the present utility model can cache the data message being passed to by image information transmitter, and under FPGA control, image data information is transferred to by display according to instruction, FPGA can interpolate that whether to be switched image is stablized, the switching of view data will be just carried out when stablizing so that the signal of input is all steady and continuous, so ensures that the steady and continuous of output picture in the handover, avoid sending the phenomenon of flicker and blank screen during switching, avoid loss of data.

Description

A kind of device that the switching of KVM switcher flicker free is realized based on FPGA

Technical field

It the utility model is related to electronic equipment manufacturing field, and in particular to one kind realizes KVM switcher without sudden strain of a muscle based on FPGA The device of bright switching.

Background technology

KVM switcher (Keyboard Video Mouse, computer switch) be by keyboard, mouse and display come Realization is generally used in the place of multiple computers or server, passed through to two or the control of multiple stage computers, KVM switcher One display and keyboard and mouse can be achieved with and the interaction of all computers and server.

In actual use, KVM switcher can avoid using a large amount of displays and key mouse, can not only save equipment into This, additionally it is possible to save substantial amounts of operating space, frame and ground space, user can re-use on Rebuild Memory desktop or The equipment of more multicomputer in frame；Meanwhile KVM switcher can avoid using by controlling central management multiple stage computers Person tosses about between different operating station or needs multiple users, can reduce the labor intensity of keeper, and can reduce people Power cost.

But most of KVM switchers are all based on ASIC (Application Specific Integrated at present Circuit, integrated circuit) application-specific integrated circuit realizes the switching of multiple stage computers or server, still, because application-specific integrated circuit does not have internal memory, Picture signal can not be preserved, necessarily causes occur the problem of jitter or transient loss signal in handoff procedure, causes Switch easily flashes in handoff procedure, the wild effect such as blank screen, although this problem simply occurs switching Cheng Zhong, but when switch is used for the higher occasion of the real-time and stability requirement to picture such as Surveillance center, data center, Flicker and blank screen phenomenon all may result in the loss of data, cause more serious consequence.

Utility model content

For defect present in prior art, the purpose of this utility model is that provide one kind realizes KVM based on FPGA The device of switch flicker free switching, it can avoid sending the phenomenon of flicker and blank screen during switching, avoid loss of data.

To achieve the above objectives, the utility model adopts the technical scheme that：

It is a kind of based on FPGA realize KVM switcher flicker free switching device, including be sequentially connected with host computer, FPGA and Display, described device also include switch controller, some decoders and some memories, and the memory is connected with FPGA Connect, the decoder is connected by switch controller with FPGA.

On the basis of above-mentioned technical proposal, described device also includes button, and the button is connected with FPGA, for FPGA sends switching command.

On the basis of above-mentioned technical proposal, the decoder with outside image information transmitter be connected, for pair The picture format of described image data transmission machine transmission is changed, and the view data after conversion is transmitted to FPGA.

On the basis of above-mentioned technical proposal, encoder is provided between the FPGA and display.

On the basis of above-mentioned technical proposal, the host computer is connected by communication interface with FPGA.

On the basis of above-mentioned technical proposal, described device includes two memories.

Compared with prior art, the utility model has the advantage of：

(1) a kind of device that the switching of KVM switcher flicker free is realized based on FPGA of the present utility model, including memory, Memory can cache the data message being passed to by image information transmitter, and under FPGA control, according to instruction by image For data information transfer to display, FPGA can interpolate that whether to be switched image is stablized, and picture number will be just carried out when stablizing According to switching so that the signal of input is all steady and continuous, so ensure that in the handover output picture steady and continuous Property, avoid sending the phenomenon of flicker and blank screen during switching, avoid loss of data.

Brief description of the drawings

Fig. 1 is the structural frames for the device for realizing the switching of KVM switcher flicker free in the utility model embodiment based on FPGA Figure.

In figure：1- host computers, 2-FPGA, 3- displays, 4- image information transmitters, 5- switch controllers, 6- decoders, 7- memories, 8- buttons, 9- encoders.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Shown in Figure 1, the utility model embodiment offer is a kind of to realize the switching of KVM switcher flicker free based on FPGA Device, including host computer 1, FPGA2 and the display 3 being sequentially connected with, host computer 1 is connected by communication interface with FPGA2, upper Machine 1 switches the picture shown by it by sending a command to FPGA2, FPGA2 control displays 3.

Device of the present utility model also includes button 8, encoder 9, switch controller 5, some decoders 6 and some storages Device 7, button 8 are connected with FPGA2, for sending switching command, decoder 6 and the phase of image information transmitter 4 of outside to FPGA2 Connection, the picture format for being transmitted to described image data transmission machine 4 are changed, and the view data after conversion is transmitted To FPGA2, FPGA2 is connected with memory 7, is stored for the view data after conversion to be transmitted to memory 7, its In, if external image information is divided into main line (n roads are shown in figure), per passed through after being decoded all the way by corresponding decoder 6 by FPGA is reached in memory 7.

Encoder, for being encoded to the view data after conversion, is shown between FPGA2 and display 3 Send to display 3 and show after the data message that device 3 can be read.

FPGA2 can read the data in memory 7 in real time, and judge whether to be switched image information completely writes, If without completely writing, memory 7 sends the image information currently shown to display 3 by encoder 9, display 3 after Continuous display present image (image not switched)；If complete write-in, encoder 9 is sent a command to, encoder 9 reads memory 7 In to be switched image information, and to be switched image information carried out into decoding sent to show to be cut to display 3, display 3 The image changed, complete the switching of image.

The utility model is not limited to above-mentioned embodiment, for those skilled in the art, not On the premise of departing from the utility model principle, some improvements and modifications can also be made, these improvements and modifications are also considered as this reality Within new protection domain.The content not being described in detail in this specification belongs to known to professional and technical personnel in the field Prior art.

Claims

1. a kind of device that the switching of KVM switcher flicker free is realized based on FPGA, including host computer (1), the FPGA being sequentially connected with And display (3) (2), it is characterised in that：Described device also includes switch controller (5), some decoders (6) and some storages Device (7), the memory (7) are connected with FPGA (2), and the decoder (6) passes through switch controller (5) and FPGA (2) phase Connection.

A kind of 2. device that the switching of KVM switcher flicker free is realized based on FPGA as claimed in claim 1, it is characterised in that： Described device also includes button (8), and the button (8) is connected with FPGA (2), for sending switching command to FPGA (2).

A kind of 3. device that the switching of KVM switcher flicker free is realized based on FPGA as claimed in claim 1, it is characterised in that： The decoder (6) is connected with the image information transmitter (4) of outside, for being transmitted to described image data transmission machine (4) Picture format changed, and the view data after conversion is transmitted to FPGA (2).

A kind of 4. device that the switching of KVM switcher flicker free is realized based on FPGA as claimed in claim 1, it is characterised in that： Encoder (9) is provided between the FPGA (2) and display (3).

A kind of 5. device that the switching of KVM switcher flicker free is realized based on FPGA as claimed in claim 1, it is characterised in that： The host computer (1) is connected by communication interface with FPGA (2).

A kind of 6. device that the switching of KVM switcher flicker free is realized based on FPGA as claimed in claim 1, it is characterised in that： Described device includes two memories (7).