Multi-path to multi-path VGA-DVI video signal switching device

Abstract

The utility model discloses a multi-path to multi-path VGA-DVI video signal switching device. The multi-path to multi-path VGA-DVI video signal switching device comprises a base, the device supports distribution and conversion tasks of video signals from 10 VGA channels to four DVI channels, supports VGA video signal input of less than 10 channels and DVI video signal output of less than 4 channels, and can provide a channel of alternating current of 220V / 50HZ to the outside. The device can control video signal switching through an RS422 serial port command, can receive a serial port command sent by control equipment with a serial port, such as a computer, and has very strong adaptability. The device can support the input of VGA signals with the resolution below 1920 * 1080, and the resolution of the output DVI signals is kept consistent with the resolution of the input path signals selected according to the switching command. The device can supply a path of 220V / 50HZ alternating current to the outside, and can supply power to display screens of various models. The external interface of the device can be suitable for related equipment on ships and warships, and has the characteristics of simple structure, stability, high reliability and flexible and configurable functions.

Description

TECHNICAL FIELD

[0001] The utility model belongs to VGA-DVI signal switching technical field, especially a kind of multiway to multiway VGA-DVI video signal switching device. BACKGROUND

[0002] In current industrial, commercial computer application occasions, DVI digital video interface and VGA analog video interface are mainstream video display interface.In large-scale production, traffic command, military command and other occasions, the video signals of multiple video equipment need to be put into the display screen of specified number to observe the situation of multiple occasions in time, so there is the demand of multiway video switching to specified line.It involves multiple VGA outputs of video equipment, selects specified several VGA video signals and switches them into DVI signals;It needs to have communication means to specify which several VGA signals are switched to which several signals;In some occasions, display screen power supply is inconvenient, and display screen power supply problem needs to be considered.

[0003] The switching device used in existing system is often less signal switching, and can only switch several display, and most of them are commercial products, and a lot of changes are needed for interfacing with other equipment, and the reliability is not high;Since most of the switching devices now have fewer switching channels, especially many devices have few external output channels, when a large number of display interfaces are switched, the switching devices need to be combined, since the external switching control signal modes of each single switching device are inconsistent, and the response time also has big difference, there are often problems such as mis-switching or asynchronous switching, and in many cases, additional switching control signal processing board is needed;Multiple devices are used in combination, which increases the number of single boards, system power consumption and wiring complexity, occupies a lot of valuable space, and often cannot meet the actual needs of military ships and other fields of multimedia display control. CONTENT OF UTILITY MODEL

[0004] The utility model aims at the problems existing in the prior art, and provides a kind of multiway to multiway VGA-DVI video signal switching device.

[0005] The technical solution that realizes the purpose of the utility model is as follows: a multi-path to multi-path VGA-DVI video signal switching device, which supports the reception of 10 paths of VGA video signals and the output of 4 paths or less of DVI video signals; the device is used for realizing the distribution conversion of 10 paths of VGA to four paths of DVI channel video signals; the device receives the serial port commands from the control equipment with a serial port and controls the video signal switching based on the serial port commands; the device supports the input of VGA signals with a resolution of 1920x1080 or less, and the resolution of the output DVI signals is consistent with that of the input channel signals selected according to the switching commands; the device supplies one path of 220V / 50HZ alternating current to power various models of display screens.

[0006] Further, the device comprises a structural member and a VGA video switching module, a VGA / DVI signal conversion module and a power module assembled inside the structural member.

[0007] The VGA video switching module is used for realizing the switching of 16x8 VGA video signals according to the externally input serial port commands.

[0008] The VGA / DVI signal conversion module is used for switching the VGA video signals output by the VGA video switching module into DVI video signals and outputting the DVI video signals to an external display.

[0009] The power module is used for converting the externally supplied AC220V alternating current into DC5V direct current to power other modules.

[0010] Further, the VGA video switching module is also used for realizing the switching control through the serial port.

[0011] Further, the VGA video switching module comprises an RGB 16x8 switching circuit, an HV circuit, an RS422 serial port control circuit, a chip control circuit and a connector signal processing circuit.

[0012] The RGB 16x8 switching circuit comprises a master control chip and is used for realizing the switching of R, G and B signal channels in 16x8 VGA video signals.

[0013] The HV circuit is used for converting the voltage of field and line signals.

[0014] The RS422 serial port circuit is used for receiving the externally input RS422 serial port commands, analyzing the RS422 serial port commands and sending the analyzed RS422 serial port commands to the master control chip.

[0015] The chip control circuit is used for controlling the working of the RGB 16*8 switching circuit and the HV circuit, receiving and analyzing RS422 serial port commands, and switching the VGA channel according to the control signals.

[0016] The connector signal processing circuit is used for filtering noise signals.

[0017] Further, the RGB 16*8 switching circuit comprises a CPLD master control chip and further comprises three SGM6514 chips, which realize synchronous switching of R, G and B signals; pin 1 to pin 16 of the SGM6514 chip are VGA input channel 8 to VGA input channel 16 and corresponding GND, wherein odd pins are signals and even pins are GND; pin 20 to pin 41 are VGA output channel 1 to VGA output channel 8 and corresponding GND and VCC; pin 64 to pin 78 are R signals of VGA input channel 1 to VGA input channel 8 and corresponding GND, wherein odd pins are R signals and even pins are GND; pin 55, pin 56, pin 58 and pin 60 to pin 62 are pins for switching control signals, and the pins of the three SGM6514 chips are connected with the CPLD master control chip; and pin 47 to pin 54 are address pins.

[0018] Further, the HV circuit comprises an SM164245 chip and an SM4245 chip, the SM164245 chip is used for converting input H signals and V signals into 3.3V signals suitable for the CPLD master control chip, and the SM4245 chip is used for converting H signals and V signals output by the CPLD master control chip into 5V signals suitable for a display; wherein the H signals and V signals suitable for the CPLD master control chip are directly controlled to switch by the CPLD master control chip, and a specified number of signals are selected from a plurality of input H signals and V signals of the CPLD according to serial port commands and output to the SM4245 chip, so as to complete the switching function.

[0019] Further, the RS422 serial port control circuit comprises a five-core connector and an SM3096 chip, the five-core connector is adapted to RS422 serial port commands and is used for receiving externally input RS422 serial port commands; and the SM9096 chip is used for voltage conversion of the RS422 serial port commands, so as to adapt to an IO port, so that the CPLD receives and analyzes serial port commands, thereby realizing control of video signal switching.

[0020] Further, the VGA / DVI signal conversion module is further used for realizing USB communication.

[0021] Further, the VGA / DVI signal conversion module comprises a TVP7002PZPR signal conversion chip, an STM32 series MCU chip, a VGA connector, a DVI connector and a power supply circuit.

[0022] The VGA connector is configured to receive external VGA signal input.

[0023] The TVP7002PZPR signal conversion chip is configured to convert the input VGA signal into a required DVI signal.

[0024] The STM32 series MCU chip is configured to control USB communication and resolution adaptation.

[0025] The DVI connector is configured to output the converted DVI signal to a connected cable.

[0026] The power supply circuit is configured to convert external input 5V voltage into required voltage for each circuit.

[0027] Further, the power supply module adopts a 4NIC-QT40-TJ model power supply module.

[0028] Compared with the prior art, the utility model has the following advantages:

[0029] (1) 10-way VGA video signal reception is supported, and resolutions below 1920x1080 are adapted.

[0030] (2) 4-way or below DVI video signal output is supported, and the resolution is consistent with the selected input path resolution.

[0031] (3) The input RS422 serial port command is used to control the matrix distribution conversion of 10-way VGA to 4-way DVI channel video signal.

[0032] (4) One 220V / 50HZ AC output is provided for the display screen.

[0033] (5) The external interface is firm and stable, and can be adapted to ship system occasions.

[0034] The utility model will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is the component block diagram of the utility model VGA-DVI video signal switching device.

[0036] Figure 2 It is the function block diagram of the VGA video switching module in one embodiment.

[0037] Figure 3 A functional block diagram of the VGA / DVI signal conversion module in one embodiment.

[0038] Figure 4 A schematic diagram of the RGB 16x8 switching circuit of the VGA video switching module in one embodiment.

[0039] Figure 5 A schematic diagram of the HV voltage conversion circuit of the VGA video switching module in one embodiment.

[0040] Figure 6 A schematic diagram of the RS422 serial port circuit of the VGA video switching module in one embodiment.

[0041] Figure 7 A schematic diagram of the VGA / DVI signal conversion module board in one embodiment.

[0042] Figure 8 A schematic diagram of the power module in one embodiment. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0044] Any technical feature that may imply a software program in the present application, the implementation of its function belongs to the prior art, and the essence of the scheme is to propose and improve the composition and connection relationship of the hardware part, and does not involve improving the software program itself. The control involved in the present application is all signal-based control, and does not involve any software algorithm, nor does it involve improvement of the control algorithm.

[0045] In one embodiment, in combination with Figure 1 , a multi-channel to multi-channel VGA-DVI video signal switching device is provided, which supports receiving 10 channels of VGA video signals and outputting 4 channels or less of DVI video signals; the device is used to realize the distribution and conversion of 10 channels of VGA to four channels of DVI channel video signals; the device receives serial port commands sent from a control device with a serial port and controls the video signal switching based on the serial port commands; the device supports VGA signal input with a resolution of 1920x1080 or less, and the resolution of the output DVI signal is consistent with that of the input channel signal selected according to the switching command; the device provides one 220V / 50HZ AC power supply to power various models of display screens.

[0046] Here, the device can be installed in a cabinet, and the external interface can be adapted to relevant equipment on a ship, and the device has the characteristics of simple structure, stability, high reliability, and flexible and configurable functions.

[0047] Further, in one of the embodiments, the device comprises a structure, and a VGA video switching module, a VGA / DVI signal conversion module, and a power module assembled inside the structure;

[0048] The VGA video switching module is configured to realize 16x8 VGA video signal switching according to an external input serial port command.

[0049] The VGA / DVI signal conversion module is configured to switch the VGA video signal output by the VGA video switching module into a DVI video signal and output to an external display.

[0050] The power module is configured to convert external power supply AC 220V alternating current into DC 5V direct current to supply power to other modules.

[0051] Further, in one of the embodiments, the VGA video switching module is further configured to realize serial port control.

[0052] Further, in one of the embodiments, in combination with Figure 2 , the VGA video switching module comprises an RGB 16x8 switching circuit, an HV circuit, an RS422 serial port control circuit, a chip control circuit, and a connector signal processing circuit.

[0053] The RGB 16x8 switching circuit comprises a master control chip, and is configured to realize switching of R, G, and B signal paths in 16x8 VGA video signals; accept 16-way VGA video signal input; and output 8-way VGA signals, each of which supports a resolution below 1920x1080.

[0054] The HV circuit is configured to perform voltage conversion on field and line signals.

[0055] The RS422 serial port circuit is configured to receive an external input RS422 serial port command, analyze the RS422 serial port command, and send the analyzed RS422 serial port command to the master control chip.

[0056] The chip control circuit is configured to control the RGB 16x8 switching circuit and the HV circuit, receive and analyze the RS422 serial port command, and switch the VGA path according to the control signal.

[0057] The connector signal processing circuit is configured to filter noise signals.

[0058] Preferably, in some embodiments, in combination with Figure 4The RGB 16*8 switching circuit comprises a CPLD master chip, and further comprises three SGM6514 chips, and the synchronization switching of R, G and B signals is realized; pin 1 to pin 16 of the SGM6514 chip are VGA input channel 8 to VGA input channel 16 and corresponding GND, wherein the odd pins are signals and the even pins are GND; pin 20 to pin 41 are VGA output channel 1 to VGA output channel 8 and corresponding GND and VCC; pin 64 to pin 78 are R signals of VGA input channel 1 to VGA input channel 8 and corresponding GND, wherein the odd pins are R signals and the even pins are GND; pin 55, pin 56, pin 58, pin 60 to pin 62 are pins for switching control signals, and the pins of the three SGM6514 chips are connected with the CPLD master chip; and pin 47 to pin 54 are address pins.

[0059] Preferably, in some embodiments, in combination with Figure 5 The HV circuit comprises an SM164245 chip and an SM4245 chip, the SM164245 chip is used for converting input H signals and V signals into 3.3V signals suitable for the CPLD master chip, and the SM4245 chip is used for converting H signals and V signals output by the CPLD master chip into 5V signals suitable for the display; wherein the H signals and V signals suitable for the CPLD master chip are directly controlled to switch by the CPLD master chip, and a specified number of signals are selected from a plurality of H signals and V signals input to the CPLD according to a serial port command and output to the SM4245 chip, so as to complete the switching function.

[0060] Preferably, in some embodiments, in combination with Figure 6 The RS422 serial port control circuit comprises a five-core connector and an SM9096 chip, the five-core connector is adapted to the RS422 serial port command and is used for receiving the externally input RS422 serial port command; and the SM9096 chip is used for voltage conversion of the RS422 serial port command, so as to adapt to the IO port, so that the CPLD receives and analyzes the serial port command, thereby realizing the control of the video signal switching.

[0061] Here, since the input RS422 signal voltage is too high and is not suitable for the IO port of the CPLD chip, the SM9096 chip is required to perform voltage conversion.

[0062] Further, in one of the embodiments, the VGA / DVI signal conversion module is further used for realizing USB communication.

[0063] Further, in one of the embodiments, in combination with Figure 3 and Figure 7The VGA / DVI signal conversion module can adapt resolutions below 1920*1080, and comprises a TVP7002PZPR signal conversion chip, an STM32 series MCU chip, a VGA connector, a DVI connector and a power supply circuit.

[0064] The VGA connector is configured to receive external VGA signal input.

[0065] The TVP7002PZPR signal conversion chip is configured to convert the input VGA signal into a required DVI signal.

[0066] The STM32 series MCU chip is configured to control USB communication and resolution adaptation (the MCU chip can make the video signal resolution more stable).

[0067] The DVI connector is configured to output the converted DVI signal to a cable connected thereto.

[0068] The power supply circuit is configured to convert external input 5V voltage into voltage required by each part of the circuit.

[0069] Here, preferably, the TVP7002PZPR signal conversion chip adopts a signal conversion chip TFP410MPAPREP, which can convert a VGA signal into an intermediate signal and convert the intermediate signal into a specified signal.

[0070] Further, in one of the embodiments, the power supply module adopts a power supply module of 4NIC-QT40-TJ type. Figure 8 The power supply module has an outer size (length* width* height) of 160mm*120mm*35mm. The power supply module is wall-mounted for heat dissipation, adopts a non-standard mounting structure, has four mounting holes with a diameter of 4.5mm, a hole distance of 120mm*112mm, and a mounting hole thickness of 3mm, and the structure design considers the design of a grounding thread hole. The power supply module can convert external input 220V alternating current into 5V direct current.

[0071] Preferably, in some embodiments, the structure has an outer size of 233.35mm (length)*160mm (width), an external interface definition in line with the CPCI specification, and a circuit power taken from a P1-bit CPCI connector. Input and output DVI-D digital video signals and VGA signals are located at P4 and P5-bit CPCI connectors.

[0072] Preferably, in some embodiments, the utility model discloses a multi-channel VGA-DVI video signal switching device, and the external size is 430mm*520mm*235mm, and the sharp edge of the upper surface of the panel is blunt 4.0*45 degrees. The shell adopts aluminum alloy 2A12 material, and the structural member is mainly composed of an interface plate, an upper cover plate, a lower cover plate, a pad plate and a cover plate, is machined by a numerical control center, is treated by oxidation according to Al / Ct.0 cd GB / T3764-1996, and the paint film adopts matt acrylic polyurethane enamel or fluorocarbon paint, the surface level is II level, exposed non-metallic materials should adopt flame-retardant (oxygen index is greater than or equal to 30), moisture-resistant, salt mist-resistant, mildew-resistant, low-toxicity materials. The panel and the socket character identification font adopt black, the height is 5mm, the width coefficient is 0.8, and the color is medium green gray.

[0073] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A multi-path VGA-DVI video signal switching device, characterized in that, The device supports receiving 10 VGA video signals and outputting 4 DVI video signals; the device is used to realize the distribution and conversion of 10 VGA to 4 DVI channel video signals; the device receives serial port commands from a control device with a serial port and controls the switching of the video signals based on the serial port commands; the device supports VGA signal input with a resolution below 1920x1080, and the resolution of the output DVI signal is consistent with that of the selected input channel signal according to the switching command; the device provides a 220V / 50HZ AC power supply for powering various types of display screens.

2. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 1, wherein, The device comprises a structural member and a VGA video switching module, a VGA / DVI signal conversion module and a power supply module assembled inside the structural member; The VGA video switching module is used to switch 16x8 VGA video signals according to externally input serial port commands. The VGA / DVI signal conversion module is used to switch the VGA video signals output by the VGA video switching module into DVI video signals and output them to external displays. The power supply module is used to convert the externally supplied AC 220V AC power into DC 5V DC power to supply power to other modules.

3. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 2, wherein, The VGA video switching module is also used to realize switching control through a serial port.

4. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 2, wherein, The VGA video switching module comprises an RGB 16x8 switching circuit, an HV circuit, an RS422 serial port control circuit, a chip control circuit and a connector signal processing circuit. The RGB 16x8 switching circuit comprises a master control chip and is used to switch the R, G and B signal channels in the 16x8 VGA video signals. The HV circuit is used to convert the field and line signals. The RS422 serial port control circuit is used to receive externally input RS422 serial port commands, analyze the RS422 serial port commands and send them to the master control chip. The chip control circuit is used to control the operation of the RGB 16x8 switching circuit and the HV circuit, receive and analyze RS422 serial port commands and switch the VGA channels according to the control signals. The connector signal processing circuit is used to filter out noise signals.

5. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 4, wherein, The RGB 16*8 switching circuit comprises a CPLD master chip, and further comprises three SGM6514 chips, which realize synchronous switching of R, G and B signals; the pin 1 to the pin 16 of the SGM6514 chip are VGA input channels 8 to 16 and corresponding GND, wherein the odd pins are signals and the even pins are GND; the pin 20 to the pin 41 are VGA output channels 1 to 8 and corresponding GND and VCC; the pin 64 to the pin 78 are R signals of the VGA input channels 1 to 8 and corresponding GND, wherein the odd pins are R signals and the even pins are GND; the pin 55, the pin 56, the pin 58, the pin 60 to the pin 62 are pins for switching control signals, and the pins of the three SGM6514 chips are connected with the CPLD master chip; and the pin 47 to the pin 54 are address pins.

6. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 5, wherein, The HV circuit comprises an SM164245 chip and an SM4245 chip, the SM164245 chip is used for converting input H signals and V signals into 3.3V signals suitable for the CPLD master chip, and the SM4245 chip is used for converting H signals and V signals output by the CPLD master chip into 5V signals suitable for a display; wherein the H signals and the V signals suitable for the CPLD master chip are directly controlled to switch by the CPLD master chip, and a specified number of signals are selected from a plurality of H signals and V signals input to the CPLD according to a serial port command and output to the SM4245 chip, so as to complete the switching function.

7. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 5, wherein, The RS422 serial port control circuit comprises a five-core connector and an SM3096 chip, the five-core connector is adapted to RS422 serial port commands and is used for receiving external input RS422 serial port commands; and the SM3096 chip is used for voltage conversion of the RS422 serial port commands, so as to adapt to IO ports, so that the CPLD receives and analyzes serial port commands, thereby realizing control of video signal switching.

8. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 2, wherein, The VGA / DVI signal conversion module is further used for realizing USB communication.

9. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 8, wherein, The VGA / DVI signal conversion module comprises a TVP7002PZPR signal conversion chip, an STM32 series MCU chip, a VGA connector, a DVI connector and a power supply circuit; The VGA connector is used for receiving external VGA signal input; The TVP7002PZPR signal conversion chip is used for converting input VGA signals into required DVI signals; The STM32 series MCU chip is used for controlling USB communication and resolution adaptation; The DVI connector is used for outputting the converted DVI signals to a cable connected therewith; The power supply circuit is used for converting external input 5V voltage into required voltages of each part of the circuit.

10. The multi-path, multi-path VGA-DVI video signal switching apparatus of claim 2, wherein, The power supply module adopts a power supply module of the 4NIC-QT40-TJ model.

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