CN209120326U - A kind of signal switching apparatus and multimedia alarm terminal - Google Patents
A kind of signal switching apparatus and multimedia alarm terminal Download PDFInfo
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- CN209120326U CN209120326U CN201821570965.4U CN201821570965U CN209120326U CN 209120326 U CN209120326 U CN 209120326U CN 201821570965 U CN201821570965 U CN 201821570965U CN 209120326 U CN209120326 U CN 209120326U
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Abstract
This application discloses a kind of signal switching apparatus, including, it will export from non-private network equipment signal source to the non-private network interface input circuit of switch method of remote signal circuit；It will export from private network equipment signal source to the private network interface input circuit of the switch method of remote signal circuit；By the signal source through switch method of remote signal circuit switching output to the display interface output circuit for showing equipment；The switch method of remote signal circuit decrypts the output of the private network interface input circuit, and the switching between the signal source output of the non-private network interface input circuit and the signal source output of the private network interface input circuit is carried out according to the switching command of decryption.The utility model is that the information publication of private network equipment extends the channel of display, realize a variety of unlike signal source interface I/O modes, meet the non-private network equipment of accessible distinct interface and show the demand of equipment, solve the problems, such as the switching of existing panel, remote control switching, software exchange signal source without encryption, safety it is poor,.
Description
Technical Field
The utility model relates to a control of display signal source specifically relates to the signal switching device of display signal source.
Background
In the technical field of civil air defense warning equipment, civil air defense information such as civil air defense propaganda, warning, intelligent voice and the like issued by a civil air defense private network is generally issued on a display screen of non-private network equipment, so that the air defense consciousness of citizens is enhanced, and the air defense warning device is used for disaster relief and emergency report under the condition of emergency at ordinary times and is used for civil air defense in wartime.
The information displayed by the display screen is derived from an input signal source interface of the display device. With the continuous development of the current technology, people successively adopt various types of signal source interfaces in order to present a signal source with high definition and high quality. Meanwhile, the function of the signal source interface is continuously enriched. Most display devices on the market generally provide only one set of signal source input ports, and connect different products by manually plugging and unplugging wires.
Although the existing signal switching device can respectively transmit one or more signal sources to the display equipment in order to avoid the complexity of manual plug connection, most of the input ports of the signal switching device are of the same type, for example, a high-definition multimedia (HDMI) switch can only switch the signal source of an HDMI interface, and cannot be compatible with multiple types of input ports at the same time, and particularly, the existing signal switching device does not provide a corresponding signal switching function for an information distribution signal source from a private network.
Disclosure of Invention
The utility model provides a signal switching device inputs display device for the signal source that comes from the private network and provides corresponding signal switching.
The utility model provides a signal switching device, which comprises,
the non-private network interface input circuit outputs the signal from the non-private network signal source to the signal switching control circuit;
a private network interface input circuit for outputting a private network signal source to the signal switching control circuit; and
the switching instruction from the private network is output to a private network interface input switching circuit of the signal switching control circuit;
a signal source switched and output by the signal switching control circuit is transmitted to a display interface output circuit of the display equipment; wherein,
the signal switching control circuit decrypts the output of the private network interface input circuit, and switches between the output signal source of the non-private network interface input circuit and the output signal source of the private network interface input circuit according to the decrypted switching instruction.
Preferably, the device further comprises a control unit,
and the manual switching circuit is enabled to receive a first control signal from the outside according to an enable signal output by the signal switching control circuit when the switching is abnormal and output a first switching instruction to the signal switching control circuit.
Preferably, the apparatus further comprises a status display circuit for indicating the current input signal source of the display device according to the status signal output by the signal switching control circuit.
Preferably, when the signal switching control circuit detects that the private network interface input circuit has no signal input, the signal switching control circuit outputs a signal from a non-private network interface input circuit through the display interface output circuit; when the output signal of the private network interface input circuit is output to the display equipment through the display interface output circuit, the current state is kept, and the current signal switching is forbidden.
Preferably, the signal switching control circuit outputs an enable signal to the manual switching circuit when the switching is abnormal, and triggers the switching according to the first switching instruction, so as to switch the output signal source of the current non-private network interface input circuit into the output signal source of the private network interface input circuit and output the output signal source of the private network interface input circuit to the display interface output circuit, or switch the output signal source of the current private network interface input circuit into the output signal source of the non-private network interface input circuit and output the output signal source of the non-private network interface input circuit to the display interface output circuit.
Preferably, the signal switching control circuit records the number of switching abnormality times, outputs an enable signal to the manual switching circuit when the number of switching abnormality times reaches a first threshold value, and executes the current switching instruction again when the number of switching abnormality times does not reach the first threshold value.
Preferably, the private network interface input circuit includes one or any combination of a private network video graphics array VGA interface input circuit, a private network digital video interface DVI interface input circuit, and a private network high definition multimedia HDMI interface input circuit.
Preferably, the non-private network interface input circuit includes one or any combination of a non-private network video graphics array VGA interface input circuit, a non-private network digital video interface DVI interface input circuit, and a non-private network high definition multimedia HDMI interface input circuit.
Preferably, the display interface circuit includes one of a video graphics array VGA interface output circuit, a digital video interface DVI interface output circuit, a high definition multimedia HDMI interface output circuit, or any combination thereof.
The utility model discloses another aspect provides a multimedia terminal, and this terminal is including above-mentioned signal switching device.
The utility model discloses an information issuing of private network equipment has expanded the channel that shows, has realized multiple different signal source interface input/output modes, has satisfied the demand that can insert different interface non-private network equipment and display device to required high safety and reliability when having solved current panel switch, remote control switch, software switching signal source do not have the problem of encrypting, security is poor, the reliability is poor when private network information issuing.
Drawings
Fig. 1 is a schematic diagram of a signal switching device according to an embodiment of the present invention;
fig. 2 shows the non-private network device interface as VGA interface and the private network device and signal switching device connection mode.
FIG. 3 shows that the non-private network device interface is DVI interface and the private network device is connected with the signal switching device,
fig. 4 shows that the non-private network device interface is an HDMI interface and the private network device is connected to the signal switching device.
Fig. 5 shows the connection mode with the signal switching device when the non-private network device interface, the private network device and the display device are respectively three different interfaces.
Detailed Description
For the purpose of making the objects, technical means and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a signal switching device according to an embodiment of the present invention. For being different from private network equipment, non-private network equipment has included public network equipment and has not accessed the off-line equipment of network. In the figure, the handover command from the non-private network signal source, the private network signal source, and the private network may be from a specific connection device, or may be a signal from the network side.
As shown in fig. 1, the apparatus includes,
non-private network Video Graphics Array (VGA) interface input circuit, non-private network Digital Video Interface (DVI) interface input circuit, non-private network HDMI interface input circuit in non-private network interface input circuit, and
a VGA interface output circuit, a DVI interface output circuit and an HDMI interface output circuit in the display interface output circuit; and
a signal switching control circuit for switching the signal source according to the interface type of the display interface output circuit, a private network interface input switching circuit for outputting the switching instruction from the private network equipment to the signal switching control circuit, a manual switching circuit, and a state display circuit,
the non-private network VGA interface input circuit, the non-private network DVI interface input circuit and the non-private network HDMI interface input circuit in the non-private network interface input circuit are used for being more compatible with various types of equipment interfaces for providing signal sources, and in practical application, corresponding interface input circuit configuration design can be carried out according to the equipment interface types of the signal sources; the non-private network interface input circuit is respectively connected with an interface corresponding to non-private network equipment for providing a signal source and is used for accessing the input of the corresponding interface of the non-private network signal source;
the private network VGA interface input circuit, the private network DVI interface input circuit and the private network HDMI interface input circuit in the private network interface input circuit are used for being more compatible with various interface types of private network equipment, and in actual application, corresponding interface input circuit configuration design can be carried out according to the interface types of the private network equipment; corresponding configuration design can also be carried out according to the interface type supported by the private network equipment, for example, if the interface type supported by the private network equipment is an HDMI interface, a private network HDMI interface input circuit is configured and designed; the private network interface input circuit is respectively connected with the corresponding interfaces of the private network equipment and is used for accessing the input of the corresponding interfaces of the private network signal source;
the VGA interface output circuit, the DVI interface output circuit and the HDMI interface output circuit in the display interface output circuit are used for being more compatible with various types of display equipment, and the interface output circuits are respectively connected with input interfaces corresponding to the display equipment and used for outputting a non-private network signal source or a private network signal source to the display equipment of a corresponding interface; in practical application, corresponding interface output circuit configuration design can be carried out according to the interface type of the display equipment;
the manual switching circuit receives a manual switching circuit enabling signal output by the signal switching control circuit when switching is abnormal, generates a first switching instruction when the manual switching circuit enables the manual switching circuit to be effective according to a first control signal input from the outside, and outputs the first switching instruction to the signal switching control circuit, so that the signal switching control circuit is triggered to switch from the current first display to the second display based on the first switching instruction when switching is abnormal, and when the enabling is invalid, the signal switching control circuit is not triggered to switch without the first switching instruction.
For example, when the current non-private network display is a non-private network display (a signal source from a non-private network device is displayed on a display device), but a switching abnormality occurs during operation and control, the current non-private network display is triggered to be switched to a private network display when a manual switching function is enabled; or, the current private network display is a private network display (a signal source from the private network device is displayed on the display device), but a switching abnormality occurs during the operation and control, and when the manual switching function is enabled, the current private network display is triggered to be switched to a non-private network display. Because the manual switching can be effective only when the private network or non-private network is abnormally switched, the problem that the alarm information cannot normally respond due to the fact that people carry out malicious switching when the alarm information is provided in a private network state is avoided, and therefore safety and reliability of the alarm information are improved.
The state display circuit indicates the source state of the input signal of the current display equipment according to the state signal output by the signal switching control circuit; for example, when the input signal of the display device is from a private network, the corresponding private network indicator light is in a bright state, and when the input signal of the display device is from a non-private network, the corresponding non-private network indicator light is in a bright state.
The switching instruction comprises a second switching instruction for outputting the signal from the private network interface input circuit to the display device through the display interface output circuit and a third switching instruction for outputting the signal from the non-private network interface input circuit to the display device through the display interface output circuit.
When no signal input from the private network interface input circuit is detected, the signal switching control circuit defaults a non-private network signal source, namely, the signal from the non-private network interface input circuit is output to the display equipment through the display interface output circuit;
when detecting that the interface input circuit from the private network has input, selecting a signal from the interface input circuit according to a switching instruction from the private network, converting according to the type of the display interface output circuit, and outputting to display equipment through the display interface output circuit; when the output signal of the private network interface input circuit is output to the display equipment through the display interface output circuit, the current display state is kept, and the current signal switching is forbidden until the third switching instruction is received; the input signal source of the private network interface input circuit is decrypted at the network side, and the switching instruction input by the private network interface input switching circuit is decrypted at the network side. The control center firstly sends an encryption switching instruction before issuing the encryption information data.
When the switching abnormity occurs, an enabling signal is output to the manual switching circuit so that the manual switching circuit can receive an external control instruction.
Furthermore, the signal switching control circuit counts the switching abnormity every time so as to avoid that the signal switching device can not work normally when switching is wrong. Specifically, the signal switching control circuit responds to a current switching instruction, clears the number of switching errors, records the number of switching errors if the switching errors occur, outputs an enabling signal to the manual switching circuit when the number of switching errors reaches a first threshold value so that the manual switching circuit can receive an external control instruction, and executes the current switching instruction again when the number of switching errors does not reach the first threshold value.
The signal switching device of the embodiment can switch the signal source only through the switching instruction from the private network equipment, otherwise, the signal source cannot be switched at will, and the manual switching operation can only be switched from the current non-private network state to the private network state but cannot be switched from the private network state to the non-private network state through the enabling control of the manual switching circuit, so that the problem that alarm information cannot be normally responded due to malicious switching of people when the alarm information is issued in the private network state is avoided, and the safety and the reliability of the signal switching device are improved; and the current switching instruction is re-executed after the switching fails, so that a switching mechanism is re-triggered after the switching fails is established for the signal switching device, and the normal switching of the non-private network and the private network is ensured.
Referring to fig. 2, fig. 2 shows a connection mode of the non-private network device interface being a VGA interface and the private network device and the signal switching device. The VGA interface output circuit of the non-private network equipment is connected with the non-private network VGA interface input circuit of the signal switching device, the HDMI interface output circuit of the private network equipment is connected with the private network HDMI interface input circuit of the signal switching device, and the VGA interface output circuit of the signal switching device is connected with the VGA interface input circuit of the display equipment. Through the signal switching device, the non-private network equipment and the private network equipment can share the same display equipment in a time-sharing mode.
Referring to fig. 3, fig. 3 shows that the non-private network device interface is a DVI interface, and the private network device is connected to the signal switching device, the DVI interface output circuit of the non-private network device is connected to the non-private network DVI interface input circuit of the signal switching device, the HDMI interface output circuit of the private network device is connected to the private network HDMI interface input circuit of the signal switching device, and the DVI interface output circuit of the signal switching device is connected to the DVI interface input circuit of the display device. Through the signal switching device, the non-private network equipment and the private network equipment can share the same display equipment in a time-sharing mode.
Referring to fig. 4, fig. 4 shows that the non-private network device interface is an HDMI interface and the private network device is connected to the signal switching device. The HDMI interface output circuit of the non-private network equipment is connected with the non-private network HDMI interface input circuit of the signal switching device, the HDMI interface output circuit of the private network equipment is connected with the private network HDMI interface input circuit of the signal switching device, and the HDMI interface output circuit of the signal switching device is connected with the HDMI interface input circuit of the display equipment. Through the signal switching device, the non-private network equipment and the private network equipment can share the same display equipment in a time-sharing mode.
Referring to fig. 5, fig. 5 shows that the non-private network device interface is a DVI interface, and the private network device is connected to the signal switching device, the DVI interface output circuit of the non-private network device is connected to the non-private network DVI interface input circuit of the signal switching device, the HDMI interface output circuit of the private network device is connected to the private network HDMI interface input circuit of the signal switching device, and the VGA interface output circuit of the signal switching device is connected to the VGA interface input circuit of the display device. Through the signal switching device, the non-private network equipment and the private network equipment can share the same display equipment in a time-sharing mode, and the compatibility of three different interfaces of the private network equipment, the display equipment and the non-private network equipment is realized.
The non-private network equipment with different interfaces can be a multimedia terminal, and the private network equipment can be a multimedia alarm terminal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A signal switching device, characterized in that the device comprises,
the non-private network interface input circuit outputs the signal from the non-private network signal source to the signal switching control circuit;
a private network interface input circuit for outputting a private network signal source to the signal switching control circuit;
the switching instruction from the private network is output to a private network interface input switching circuit of the signal switching control circuit; and
a signal source switched and output by the signal switching control circuit is transmitted to a display interface output circuit of the display equipment; wherein,
and the signal switching control circuit switches the output signal source of the non-private network interface input circuit and the output signal source of the private network interface input circuit according to the switching instruction, and performs signal conversion according to the interface type of the display interface output circuit.
2. The apparatus of claim 1, further comprising,
and the manual switching circuit is enabled to receive a first control signal from the outside according to an enable signal output by the signal switching control circuit when the switching is abnormal and output a first switching instruction to the signal switching control circuit.
3. The apparatus of claim 1 or 2, further comprising,
and the state display circuit indicates the current state of the input signal source of the display equipment according to the state signal output by the signal switching control circuit.
4. The apparatus according to claim 1, wherein the signal switching control circuit outputs a signal from the non-private network interface input circuit through the display interface output circuit when detecting that the private network interface input circuit has no signal input; when the output signal of the private network interface input circuit is output to the display equipment through the display interface output circuit, the current state is kept, and the current signal switching is forbidden.
5. The apparatus according to claim 2, wherein the signal switching control circuit outputs an enable signal to the manual switching circuit when switching is abnormal, and triggers switching according to the first switching instruction, so as to switch the output signal source of the current non-private network interface input circuit to the output signal source of the private network interface input circuit and output the output signal source of the current private network interface input circuit to the display interface output circuit, or switch the output signal source of the current private network interface input circuit to the output signal source of the non-private network interface input circuit and output the output signal source of the current private network interface input circuit to the display interface output circuit.
6. The apparatus of claim 5, wherein the signal switching control circuit records the number of switching abnormality times, outputs an enable signal to the manual switching circuit when the number of switching abnormality times reaches a first threshold value, and executes the current switching instruction again when the number of switching abnormality times does not reach the first threshold value.
7. The apparatus of claim 1, wherein the private network interface input circuit comprises one of a private network Video Graphics Array (VGA) interface input circuit, a private network Digital Video Interface (DVI) interface input circuit, a private network High Definition Multimedia (HDMI) interface input circuit, or any combination thereof.
8. The apparatus of claim 1, wherein the non-private network interface input circuit comprises one of a non-private network Video Graphics Array (VGA) interface input circuit, a non-private network Digital Video Interface (DVI) interface input circuit, a non-private network High Definition Multimedia (HDMI) interface input circuit, or any combination thereof.
9. The apparatus of claim 1, wherein the display interface circuit comprises one of a Video Graphics Array (VGA) interface output circuit, a Digital Video Interface (DVI) interface output circuit, a High Definition Multimedia (HDMI) interface output circuit, or any combination thereof.
10. A multimedia warning terminal, characterized in that it comprises a signal switching device according to claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821570965.4U CN209120326U (en) | 2018-09-26 | 2018-09-26 | A kind of signal switching apparatus and multimedia alarm terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821570965.4U CN209120326U (en) | 2018-09-26 | 2018-09-26 | A kind of signal switching apparatus and multimedia alarm terminal |
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| Publication Number | Publication Date |
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| CN209120326U true CN209120326U (en) | 2019-07-16 |
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| CN201821570965.4U Active CN209120326U (en) | 2018-09-26 | 2018-09-26 | A kind of signal switching apparatus and multimedia alarm terminal |
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