CN212324235U - Video signal switching circuit and signal switching equipment - Google Patents
Video signal switching circuit and signal switching equipment Download PDFInfo
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- CN212324235U CN212324235U CN202020978807.3U CN202020978807U CN212324235U CN 212324235 U CN212324235 U CN 212324235U CN 202020978807 U CN202020978807 U CN 202020978807U CN 212324235 U CN212324235 U CN 212324235U
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Abstract
The utility model provides a video signal switching circuit and signal switching equipment, a video signal switching circuit, it includes first port, switches chip, control module, second port and third port, first port the third port reaches the second port respectively with switch chip electric connection, control module with switch chip and first port electric connection, first port passes through switch the chip to the third port with the alternative transmission signal of second port, the third port with the alternative of second port passes through switch the chip to first port transmission signal. The signal switching equipment comprises two video signal switching circuits which are respectively an input circuit and an output circuit, wherein the input circuit and the output circuit are electrically connected.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a video signal switches the field, in particular to video signal switching circuit and a signal switching equipment.
[ background of the invention ]
With the pursuit of viewing and listening, HDMI (High Definition Multimedia Interface) and Displayport (DP Interface) are widely used as High-speed video display interfaces, wherein Displayport is a new High-speed video Interface capable of transmitting video signals with High resolution and High refresh rate and is included in the USB Type-C protocol.
In present electronic equipment, DP and HDMI signal are for carrying out signal connection transmission independently separately, and the user needs the corresponding line of targeted selection and the port signal that transmits to correspond, and input port and output port all need the plug to change corresponding connecting device, be unfavorable for electronic equipment's quick plug, reduce the practicality of use.
[ Utility model ] content
In order to overcome the problem that the practicality of present signal transmission equipment is low at present, the utility model provides a video signal switching circuit and signal switching equipment.
The utility model solves the technical problem, and the technical scheme is as follows: a video signal switching circuit comprises a first port, a switching chip, a control module, a second port and a third port, wherein the first port, the third port and the second port are electrically connected with the switching chip respectively, the control module is electrically connected with the switching chip and the first port, an input end inputs a signal through the switching chip and outputs the signal from an output end, and the control module identifies the type of the input signal.
Preferably, the second port is a Type-C port or a Displayport, and the third port is an HDMI port.
Preferably, the first port is a magnetic suction port, the first port comprises 24 connecting pieces.
Preferably, the a2 pin of the first port is electrically connected to the D1-pin of the switching chip, the A3 pin of the first port is electrically connected to the D1+ pin of the switching chip, the a4 pin of the first port is electrically connected to the D0-pin of the switching chip, the a5 pin of the first port is electrically connected to the D0+ pin of the switching chip, the a7 pin of the first port is electrically connected to the SDA pin of the switching chip, the A8 pin of the first port is electrically connected to the SCL pin of the switching chip, the B5 pin of the first port is electrically connected to the HPD pin of the switching chip, the B8 pin of the first port is electrically connected to the D3-pin of the switching chip, the B9 pin of the first port is electrically connected to the D3+ pin of the switching chip, the B10 pin of the first port is electrically connected to the D2-pin of the switching chip, the pin B11 of the first port is electrically connected with the pin D2+ of the switching chip.
Preferably, the SCL _ a pin of the switching chip is electrically connected to the 15 pins of the third port, and the SDA _ a pin of the switching chip is electrically connected to the 16 pins of the third port; a pin D0+ _ A of the switching chip is electrically connected with a pin 12 of the third port, a pin D0- _ A of the switching chip is electrically connected with a pin 10 of the third port, a pin D1+ _ A of the switching chip is electrically connected with a pin 9 of the third port, a pin D1- _ A of the switching chip is electrically connected with a pin 7 of the third port, a pin D2+ _ A of the switching chip is electrically connected with a pin 6 of the third port, a pin D2- _ A of the switching chip is electrically connected with a pin 4 of the third port, a pin D3+ _ A of the switching chip is electrically connected with a pin 2 of the third port, and a pin D3- _ A of the switching chip is electrically connected with a pin 1 of the third port; and the HPD _ A pin of the switching chip is electrically connected with the 19 pin of the third port.
Preferably, the SCL _ B pin of the switching chip is electrically connected to the A8 pin of the second port, and the SDA _ B pin of the switching chip is electrically connected to the B8 pin of the second port; the D0+ _ B pin of the switching chip is electrically connected with the B2 pin of the second port, the D0- _ B pin of the switching chip is electrically connected with the B3 pin of the second port, the D1+ _ B pin of the switching chip is electrically connected with the A11 pin of the second port, the D1- _ B pin of the switching chip is electrically connected with the A10 pin of the second port, the D2+ _ B pin of the switching chip is electrically connected with the B11 pin of the second port, the D2- _ B pin of the switching chip is electrically connected with the B10 pin of the second port, the D3+ _ B pin of the switching chip is electrically connected with the A2 pin of the second port, and the D3- _ B pin of the switching chip is electrically connected with the A3 pin of the second port.
Preferably, the control module is electrically connected to a SEL2 pin of the switch chip, and the control module is electrically connected to a B4 pin of the first port.
Preferably, the switching chip is TS3DV642, and the control module is a single chip microcomputer.
A signal switching apparatus comprising the video signal switching circuit according to any one of claims 1 to 8, the video signal switching circuit being two in number, being an input circuit and an output circuit, respectively, the input circuit and the output circuit being electrically connected.
Preferably, the output circuit includes an output first port, an output switching chip, an output control module, an output second port, and an output third port, and the input circuit includes an input first port, an input switching chip, an input control module, an input second port, and an input third port; the output first port, the output second port and the output third port are electrically connected with the output switching chip respectively, the input first port, the input second port and the input third port are electrically connected with the input switching chip respectively, the output control module is electrically connected with the output switching chip and the output first port, and the input control module is electrically connected with the input switching chip and the input first port.
Compared with the prior art, the utility model provides a pair of video signal switching circuit and signal switching equipment have following advantage:
1. the video signal switching circuit is provided with a switching chip for switching a signal channel to transmit a signal corresponding to the channel, so that the signal of the first port can transmit the signal to a third port or a second port, or the third port or the second port transmits the signal to the first port, so that the video signal switching circuit can output a DP signal or an HDMI signal from the same port, or transmit the DP signal or the HDMI signal from the same port, and a control module for sending a control signal to the switching chip and the first port to control the type of the signal entering or outputting, so that the video signal switching circuit is suitable for electronic equipment with different signals, the applicability and the convenience of the video signal switching circuit are improved, meanwhile, the video signal switching circuit can directly plug and pull the port of the equipment, the channel transmission can be selected according to the current signal type, and further, the user can select the type of the currently output or input signal by sending an instruction to the control module, so that the video signal switching circuit can change the output channel according to the selection of the user, further change the type of the signal output, and improve the practicability of the video signal switching circuit.
2. Switch chip and control module electric connection, control module and first port electric connection, control module sends control signal to switching chip and first port, make the transmission channel that the switching chip switched current signal and corresponds, perhaps the user sends the instruction to control module, make control module send control signal to first port, make first port send the signal of user's appointed signal type, and then video signal switching circuit can change the channel according to current signal type or user's needs, make video signal switching circuit can freely switch channel transmission signal, improve video signal switching circuit's practicality.
3. The first port is a magnetic attraction port, so that the first port can be connected with a corresponding interface through magnetic connection, and the stability of the electrical connection of the first port is improved.
4. The switching chip has A, B two channels, and the A channel is to third port transmission HDMI signal, and the B channel is to second port transmission Displayport signal, and the switching chip selects a channel that A, B channel corresponds through HPD _ B pin high level or low level in order to transmit corresponding signal for the switching chip can automatic switch channel carry out the transmission signal, improves video signal switching circuit's degree of automation, can save the step of staff's operation.
5. The control module is respectively connected with an SEL2 pin and a B4 pin of the switching chip, the control module can control channel selection of the switching chip by taking a level signal as the level signal, and synchronously sends a control signal to the switching chip to control the switching chip to switch the channel to transmit a corresponding signal by identifying the signal type of the second port, so that the practicability of the video signal switching circuit is improved.
6. A signal switching device is composed of an input circuit and an output circuit, wherein the output circuit is used for outputting a first port and transmitting a signal to any port of an output third port or an output second port through an output switching chip, the input circuit is used for inputting any port of the third port or the second port and transmitting a signal to the input first port through an input switching chip, a control module can automatically identify the signal types input by the input switching chip and the input third port and the input second port, and further sends a control signal switching corresponding signal to the output switching chip so as to transmit a channel corresponding to the input first port, so that the input signal can be output at any port of the output third port or the output second port, the signal switching device can automatically switch the output channel, further, the signal can be normally transmitted through the signal device, and the automation of the signal switching device can be improved, the step of manual operation can be saved; furthermore, the control module can control the types of the output signals of the output first port and the input first port through the instruction of the user, so that the signal switching equipment outputs the signals required by the user, the signal switching equipment transmits the signals according to the requirements of the user, and the practicability of the signal switching equipment is improved.
The above is only a preferred embodiment of the present invention, and should not be limited to the present invention, and any modifications, equivalent replacements, and improvements made within the principle of the present invention should be included in the protection scope of the present invention.
[ description of the drawings ]
Fig. 1 is a block diagram of an overall structure of a video signal switching circuit according to a first embodiment of the present invention;
fig. 2 is a circuit diagram of a first port and a switching chip of a video signal switching circuit according to a first embodiment of the present invention;
fig. 3 is a circuit diagram of a switching chip, a third port and a second port of a video signal switching circuit according to a first embodiment of the present invention;
fig. 4 is a frame diagram of an overall structure of a signal switching apparatus according to a second embodiment of the present invention.
Description of the drawings reference numbers:
1. a video signal switching circuit; 11. a first port; 12. a second port; 13. a third port; 14. switching the chips; 15. a control module; 100. a signal switching device; 101. an input circuit; 102. an output circuit; 1011. inputting a first port; 1012. inputting a switching chip; 1013. inputting a third port; 1014. an input second port; 1015. an input control module; 1021. an output first port; 1022. an output switching chip; 1023. an output third port; 1024. an output second port; 1025. and an output control module.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Referring to fig. 1, a first embodiment of the present invention provides a video signal switching circuit, which is used for switching between two channels to transmit signals to one channel or one channel, and includes a first port 11, a control module 15, a switching chip 14, a third port 13, and a second port 12, where the first port 11, the third port 13, and the second port 12 are respectively electrically connected to the switching chip 14, the first port 11 is used for transmitting HDMI signals and DP signals, the third port 13 is used for transmitting the HDMI signals, the second port 12 is used for transmitting DP signals, the control module is used for controlling the switching chip 14 to select transmission ports, and the switching chip 14 is used for switching between any one of the third port 13 and the second port 12 to input or output signals.
The input end inputs signals through the switching chip 14 and outputs the signals from an output end, and the control module 15 identifies the type of the input signals.
Specifically, when the input terminal is the first port 11, the output ports are the second port 12 and the third port 13, and when the input terminal is the second port 12 and the third port 13, the output terminal is the first port 11.
It is understood that the video signal switching circuit 1 can transmit signals from either of the two ports to the first port 11, or signals are transmitted from the first port 11 to any one of the second port 12 or the third port 13, the switching chip 14 can select the current third port 13 or the second port 12 to transmit signals, so that the device can transmit signals to the electronic device matched with the transmission of the DP signal or the HDMI signal, the video signal switching circuit 1 can be applied to electronic devices of different signals, the signal required by the user is obtained by switching the corresponding channel, the applicability and the convenience of the video signal switching circuit 1 are improved, further, the video signal switching circuit 1 can directly plug and pull the port, the channel transmission can be selected according to the current signal type, so that the equipment can be conveniently and quickly plugged and unplugged, and the practicability of the video signal switching circuit 1 is improved. Further, the control module 15 can send a control signal to the switch chip 14 and the first port 11, the switch chip 14 can identify the type of its input signal to perform an output channel to transmit a signal corresponding to the input signal, the switch chip 14 can identify the type of the signal transmitted by the first port 11 and identify the type of the signal transmitted by the third port 13 and the second port 12 to determine a channel required for transmitting the signal output by the switch chip 14, so that the switch chip 14 can switch the channel to adapt to the signal currently input by the switch chip 14.
Optionally, the second port 12 can be any kind of port of Type-C port or Displayport, can understand, because Type-C port or Displayport port transmission protocol is unanimous, the second port 12 is the transmission DP signal, the utility model discloses in, the second port 12 is Displayport, but is not limited to this embodiment.
Preferably, the switching chip 14 is TS3DV642, and the control module 15 is a single chip.
The first port 11 is a magnetic suction port, the first port 11 comprises at least 24 connecting pieces; it can be understood that the first port 11 can be connected to the port corresponding to the electronic device through magnetic connection, which is convenient for the first port 11 to be connected to the corresponding port through magnetic connection, and improves the stability of the electrical connection of the first port 11.
Referring to fig. 2 and 3, the a2 pin of the first port 11 is electrically connected to the D1-pin of the switching chip 14, the A3 pin of the first port 11 is electrically connected to the D1+ pin of the switching chip 14, the a4 pin of the first port 11 is electrically connected to the D0-pin of the switching chip 14, the a5 pin of the first port 11 is electrically connected to the D0+ pin of the switching chip 14, the a7 pin of the first port 11 is electrically connected to the SDA pin of the switching chip 14, the A8 pin of the first port 11 is electrically connected to the SCL pin of the switching chip 14, the B5 pin of the first port 11 is electrically connected to the HPD pin of the switching chip 14, the B8 pin of the first port 11 is electrically connected to the D3-pin of the switching chip 14, the B9 pin of the first port 11 is electrically connected to the D3+ pin of the switching chip 14, the pin B10 of the first port 11 is electrically connected to the pin D2-of the switch chip 14, and the pin B11 of the first port 11 is electrically connected to the pin D2+ of the switch chip 14.
Specifically, the pin a2 of the first port 11 communicates a DP-HD _ RX0P signal with the pin D1-of the switching chip 14, the pin A3 of the first port 11 communicates a DP-HD _ RX0N signal with the pin D1+ of the switching chip 14, the pin a4 of the first port 11 communicates a DP-HD _ RXCP signal with the pin D0-of the switching chip 14, the pin a5 of the first port 11 communicates a DP-HD _ RXCN signal with the pin D0+ of the switching chip 14, the pin a7 of the first port 11 communicates a DP-HD _ signal with the pin SDA of the switching chip 141, the pin A8 of the first port 11 communicates a DP-HD _ SCL signal with the pin SCL of the switching chip 14, the pin B5 of the first port 11 communicates a DP-HD _ RX signal with the pin HPD of the switching chip 14, the pin B8 of the first port 11 and the pin D3-of the switch chip 14 transmit a DP-HD _ RX2P signal, the pin B9 of the first port 11 and the pin D3+ of the switch chip 14 transmit a DP-HD _ RX2N signal, the pin B10 of the first port 11 and the pin D2-of the switch chip 14 transmit a DP-HD _ RX1P signal, and the pin B11 of the first port 11 and the pin D2+ of the switch chip 14 transmit a DP-HD _ RX1N signal.
It can be understood that the first port 11 is electrically connected to the switch chip 14, the first port 11 can transmit an HDMI signal or a DP signal to the switch chip 14, or the switch chip 14 can transmit an HDMI signal or a DP signal to the first port 11, and the channels of the first port 11 and the switch chip 14 can accommodate the transmission of any one of the HDMI signal or the DP signal.
With reference to fig. 2 and fig. 3, the control module 15 is electrically connected to the SEL2 pin of the switch chip 14, and the control module 15 is electrically connected to the B4 pin of the first port 11.
It can be understood that the control module 15 can transmit control signals to the switching chip 14 and the first port 11 through the SEL2 pin of the switching chip 14 and the B4 pin of the first port 11, respectively, so as to control the switching chip 14 to transmit signals that need to be transmitted currently, thereby improving the practicability of the video signal switching circuit 1.
The SCL _ a pin of the switching chip 141 is electrically connected to the 15 pin of the third port 13, and the SDA _ a pin of the switching chip 14 is electrically connected to the 16 pin of the third port 13; the pin D0+ _ a of the switching chip 14 is electrically connected to the pin 12 of the third port 13, the pin D0- _ a of the switching chip 14 is electrically connected to the pin 10 of the third port 13, the pin D1+ _ a of the switching chip 14 is electrically connected to the pin 9 of the third port 13, the pin D1- _ a of the switching chip 14 is electrically connected with the pin 7 of the third port 13, the pin D2+ _ a of the switching chip 141 is electrically connected to the pin 6 of the third port 13, the pin D2- _ a of the switch chip 14 is electrically connected to the pin 4 of the third port 13, the pin D3+ _ a of the switching chip 14 is electrically connected to the pin 2 of the third port 13, the pin D3- _ A of the switching chip 14 is electrically connected with the pin 1 of the third port 13; the HPD _ a pin of the switching chip 14 is electrically connected to the 19 pin of the third port 13.
Specifically, the SCL _ a pin of the switching chip 14 communicates the DD _ CSCL signal with the 15 pin of the third port 13, the SDA _ a pin of the switching chip 14 communicates the DD _ CSDA signal with the 16 pin of the third port 13, the D0+ _ a pin of the switching chip 14 communicates the RXCN _1 signal with the 12 pin of the third port 13, the D0 _apin of the switching chip 14 communicates the RXCP _1 signal with the 10 pin of the third port 13, the D1+ _ a pin of the switching chip 14 communicates the RX0N _1 signal with the 9 pin of the third port 13, the D1- _ a pin of the switching chip 141 communicates the RX0P _1 signal with the 7 pin of the third port 13, the D2+ _ a pin of the switching chip 141 communicates the RX1N _1 signal with the 6 pin of the third port 13, the D2- _ a pin of the switching chip 14 communicates the RX1 _ 1P _ 3 pin with the 3 pin of the third port 864, the pin D3+ _ a of the switch chip 14 and the pin 2 of the third port 13 transmit an RX2N _1 signal, the pin D3- _ a of the switch chip 14 and the pin 1 of the third port 13 transmit an RX2P _1 signal, and the pin HPD _ a of the switch chip 141 and the pin 19 of the third port 13 transmit an HDMI-HPD signal.
The SCL _ B pin of the switch chip 14 is electrically connected to the A8 pin of the second port 12, and the SDA _ B pin of the switch chip 14 is electrically connected to the B8 pin of the second port 12; the pin D0+ _ B of the switch chip 14 is electrically connected with the pin B2 of the second port 12, the pin D0- _ B of the switch chip 14 is electrically connected with the pin B3 of the second port 12, the D1+ _ B pin of the switch chip 14 is electrically connected with the a11 pin of the second port 12, the D1- _ B pin of the switch chip 14 is electrically connected with the a10 pin of the second port 12, the pin D2+ _ B of the switch chip 14 is electrically connected with the pin B11 of the second port 12, the pin D2- _ B of the switch chip 14 is electrically connected with the pin B10 of the second port 12, the D3+ _ B pin of the switch chip 14 is electrically connected with the a2 pin of the second port 12, the D3- _ B pin of the switch chip 14 is electrically connected with the A3 pin of the second port 12.
Specifically, the SCL _ B pin of the switching chip 14 and the a8 pin of the second port 12 transmit an AUXP signal, the SDA _ B pin of the switching chip 14 and the B8 pin of the second port 12 transmit an AUXN signal, the D0+ _ B pin of the switching chip 14 and the B2 pin of the second port 12 transmit a LANE0P _1 signal, the D0 _ B pin of the switching chip 141 and the B3 pin of the second port 12 transmit a LANE0N _1 signal, the D1+ _ B pin of the switching chip 14 and the a11 of the second port 12 transmit a LANE1P _1 signal, the D1 _ B pin of the switching chip 14 and the a10 pin of the second port 12 transmit a LANE1N _1 signal, the D2+ _ B pin of the switching chip 141 and the B8 pin 6862 _ B2 pin of the second port 12 transmit a LANE1 signal, the D10 _ B356 _ B signal and the D10 pin of the second port 12, the pin D3+ _ B of the switching chip 14 and the pin a2 of the second port 12 transfer the LANE3P _1 signal, and the pin D3- _ B of the switching chip 14 and the pin A3 of the second port 12 transfer the LANE3N _1 signal.
It can be understood that there are A, B two channels in the switch chip 14 for respectively transmitting HDMI signals and DP signals, the first port 11 is connected to the switch chip 14 for transmitting HDMI signals or DP signals, the switch chip 14 is further connected to A, B channels for respectively transmitting HDMI signals or DP signals to the third port 13 or the second port 12, or any one of the third port 13 and the second port 12 for transmitting HDMI signals or DP signals to the switch chip 14, the switch chip 14 switches A, B channels for transmitting signals corresponding to the switch chip 14, so that the video signal switch circuit 1 can transmit corresponding signals according to the corresponding signals, further, the switch chip 14 selects a channel corresponding to A, B channels for transmitting corresponding signals according to the high level or low level of the signals transmitted by the HPD _ B pin, so that the switch chip 14 can automatically switch channels for transmitting signals, the automation degree of the video signal switching circuit 1 is improved, and the manual operation step can be omitted.
It can be understood that the HPD _ a pin of the switching chip 14 and the 19 pin of the third port 13 transmit an HDMI-HPD signal, the B5 pin of the first port 11 and the HPD pin of the switching chip 14 transmit a DP-HD _ HPD signal, and the DP-HD _ HPD signal is distinguished by a high-low level signal of the DP-HD _ HPD signal, so that the switching chip 14 knows the current signal type transmitted by the first port 11, and further switches A, B channels to transmit corresponding signals, and controls the on-off of the third port 13 by sending the HDMI-HPD signal to the third port 13, so as to transmit the corresponding HDMI signal or DP signal to the corresponding port; in addition, when any one of the third port 13 or the second port 12 transmits a signal to the switching chip 14, the HDMI-HPD signal is transmitted through the third port 13, whether the current port transmits a signal to the switching chip 14 is identified through the HDMI-HPD signal, so as to identify the type of the signal transmitted to the switching chip 14, and further transmit a corresponding signal to the first port 11, and at the same time, the switching chip 14 transmits a control signal to the control module 15, so that the first port 11 can transmit a corresponding signal to the outside, further, the control module 15 can switch the channel of the switching chip 14 by transmitting a control signal, so that the switching chip 14 switches the corresponding channel, so that the control module 15 can control the switching chip 14 to switch the channel, and a user can transmit a command to the control module 15 to transmit the control signal to control the switching chip 14 to switch the channel to transmit the signal, the video signal switching circuit 1 can output corresponding signals according to the needs of users, and the practicability of the signal switching signals is improved.
It can be understood that the control module 15 is respectively connected to the SEL2 pin and the B4 pin of the switching chip 14, the control module 15 can control the channel selection of the switching chip 14 by using the level signal as the level signal, and by identifying the signal type of the second port 12, synchronously sends the control signal to the switching chip 14 to control the switching chip 14 to switch the channel to transmit the corresponding signal, so that the practicability of the video signal switching circuit 1 is improved.
Referring to fig. 4, a second embodiment of the present invention provides a signal switching apparatus 100, including the video signal switching circuit 1, where the number of the video signal switching circuits 1 is two, and the two video signal switching circuits are an input circuit 101 and an output circuit 102, and the input circuit 101 is electrically connected to the output circuit 102.
The first port 11 is divided into an input first port 1011 and an output first port 1021; the output circuit 102 includes an output first port 1021, an output switching chip 1022, an output control module 1025, an output third port 1023, and an output second port 1024, and the input circuit 101 includes an input first port 1011, an input switching chip 1012, an input control module 1015, an input third port 1013, and an input second port 1014.
Specifically, the output circuit 102 transmits a signal to the output third port 1023 or the output second port 1024 for the output first port 1021 through the output switching chip 1022, the input circuit 101 transmits a signal to the input first port 1011 through the input switching chip 1012 for either the input third port 1013 or the input second port 1014, the output control module 1025 is electrically connected to the output switch chip 1022 and the output first port 1021 respectively, the input control module is electrically connected to the input switch chip 1012 and the input first port 1011 respectively, the input control module 1015 is configured to send a control signal to control the input switching chip 1012 to transmit a signal according to a corresponding channel, the output control module 1025 is configured to send a control signal to control the output first port 1021 to output a signal corresponding to the signal type.
It can be understood that the input control module 1015 can automatically recognize the signal types input by the input switching chip 1012 and the input third port 1013 and the input second port 1014, and further transmit the control signal switching corresponding signal to the output switching chip 1022 to transfer the channel corresponding to the input first port 1011, so that the input signal can be output at any one of the output third port 1023 or the output second port 1024, and the signal switching apparatus 100 can automatically switch the output channel, so that the signal can be normally transmitted through the signal apparatus, thereby improving the automation of the signal switching apparatus 100 and omitting the manual operation step; further, the input control module 1015 and the output control module 1025 can send corresponding instructions through the user, and further control the types of the output signals of the output first port 1021 and the input first port 1011, so that the signal switching device 100 outputs the signals required by the user, the signal switching device 100 transmits the signals according to the requirements of the user, and the practicability of the signal switching device 100 is improved.
Compared with the prior art, the utility model provides a pair of video signal switching circuit and signal switching equipment has following advantage:
1. the video signal switching circuit is provided with a switching chip for switching a signal channel to transmit a signal corresponding to the channel, so that the signal of the first port can transmit the signal to a third port or a second port, or the third port or the second port transmits the signal to the first port, so that the video signal switching circuit can output a DP signal or an HDMI signal from the same port, or transmit the DP signal or the HDMI signal from the same port, and a control module for sending a control signal to the switching chip and the first port to control the type of the signal entering or outputting, so that the video signal switching circuit is suitable for electronic equipment with different signals, the applicability and the convenience of the video signal switching circuit are improved, meanwhile, the video signal switching circuit can directly plug and pull the port of the equipment, the channel transmission can be selected according to the current signal type, and further, the user can select the type of the currently output or input signal by sending an instruction to the control module, so that the video signal switching circuit can change the output channel according to the selection of the user, further change the type of the signal output, and improve the practicability of the video signal switching circuit.
2. Switch chip and control module electric connection, control module and first port electric connection, control module sends control signal to switching chip and first port, make the transmission channel that the switching chip switched current signal and corresponds, perhaps the user sends the instruction to control module, make control module send control signal to first port, make first port send the signal of user's appointed signal type, and then video signal switching circuit can change the channel according to current signal type or user's needs, make video signal switching circuit can freely switch channel transmission signal, improve video signal switching circuit's practicality.
3. The first port is a magnetic attraction port, so that the first port can be connected with a corresponding interface through magnetic connection, and the stability of the electrical connection of the first port is improved.
4. The switching chip has A, B two channels, and the A channel is to third port transmission HDMI signal, and the B channel is to second port transmission Displayport signal, and the switching chip selects a channel that A, B channel corresponds through HPD _ B pin high level or low level in order to transmit corresponding signal for the switching chip can automatic switch channel carry out the transmission signal, improves video signal switching circuit's degree of automation, can save the step of staff's operation.
5. The control module is respectively connected with an SEL2 pin and a B4 pin of the switching chip, the control module can control channel selection of the switching chip by taking a level signal as the level signal, and synchronously sends a control signal to the switching chip to control the switching chip to switch the channel to transmit a corresponding signal by identifying the signal type of the second port, so that the practicability of the video signal switching circuit is improved.
6. A signal switching device is composed of an input circuit and an output circuit, wherein the output circuit inputs signals with different formats through at least two output ports and inputs the signals into the input circuit from one port, the input circuit correspondingly outputs signals with different formats through at least two input ports, an output switching chip can switch channels of the input signals, the input switching chip can transmit the signals according to the corresponding channels, port transmission signals with multiple signal types are output through a single port, and the signals are correspondingly output through multiple ports, so that the video signal switching device can transmit the signals with multiple formats, the change of the original signals is avoided, the authenticity of signal transmission is ensured, furthermore, the video signal switching device can disconnect the transmission of the signals by disconnecting the input first port from the output first port, namely the input first port is connected with the output first port in a breakable manner, the rapid plugging of the equipment is realized to disconnect the signal transmission path, the video signal switching equipment can directly plug the port, and the convenience and the practicability of the video signal switching equipment are improved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A video signal switching circuit, characterized by: comprises a first port, a switching chip, a control module, a second port and a third port, wherein the first port, the third port and the second port are respectively electrically connected with the switching chip, the control module is electrically connected with the switching chip and the first port,
the input end inputs signals through the switching chip and outputs the signals from an output end, and the control module identifies the type of the input signals.
2. The video signal switching circuit of claim 1, wherein: the second port is a Type-C port or a Displayport, and the third port is an HDMI port.
3. The video signal switching circuit of claim 1, wherein: the first port is a magnetic suction port and comprises 24 connecting pieces.
4. The video signal switching circuit of claim 1, wherein: the pin A2 of the first port is electrically connected with the pin D1-of the switching chip, the pin A3 of the first port is electrically connected with the pin D1+ of the switching chip, the pin A4 of the first port is electrically connected with the pin D0-of the switching chip, the pin A5 of the first port is electrically connected with the pin D0+ of the switching chip, the pin A7 of the first port is electrically connected with the pin SDA of the switching chip, the pin A8 of the first port is electrically connected with the pin SCL of the switching chip, the pin B5 of the first port is electrically connected with the pin HPD of the switching chip, the pin B8 of the first port is electrically connected with the pin D3-of the switching chip, the pin B9 of the first port is electrically connected with the pin D3+ of the switching chip, and the pin B10 of the first port is electrically connected with the pin D2-of the switching chip, the pin B11 of the first port is electrically connected with the pin D2+ of the switching chip.
5. The video signal switching circuit of claim 1, wherein: the SCL _ A pin of the switching chip is electrically connected with the 15 pins of the third port, and the SDA _ A pin of the switching chip is electrically connected with the 16 pins of the third port;
a pin D0+ _ A of the switching chip is electrically connected with a pin 12 of the third port, a pin D0- _ A of the switching chip is electrically connected with a pin 10 of the third port, a pin D1+ _ A of the switching chip is electrically connected with a pin 9 of the third port, a pin D1- _ A of the switching chip is electrically connected with a pin 7 of the third port, a pin D2+ _ A of the switching chip is electrically connected with a pin 6 of the third port, a pin D2- _ A of the switching chip is electrically connected with a pin 4 of the third port, a pin D3+ _ A of the switching chip is electrically connected with a pin 2 of the third port, and a pin D3- _ A of the switching chip is electrically connected with a pin 1 of the third port;
and the HPD _ A pin of the switching chip is electrically connected with the 19 pin of the third port.
6. The video signal switching circuit of claim 1, wherein: the SCL _ B pin of the switching chip is electrically connected with the A8 pin of the second port, and the SDA _ B pin of the switching chip is electrically connected with the B8 pin of the second port;
the D0+ _ B pin of the switching chip is electrically connected with the B2 pin of the second port, the D0- _ B pin of the switching chip is electrically connected with the B3 pin of the second port, the D1+ _ B pin of the switching chip is electrically connected with the A11 pin of the second port, the D1- _ B pin of the switching chip is electrically connected with the A10 pin of the second port, the D2+ _ B pin of the switching chip is electrically connected with the B11 pin of the second port, the D2- _ B pin of the switching chip is electrically connected with the B10 pin of the second port, the D3+ _ B pin of the switching chip is electrically connected with the A2 pin of the second port, and the D3- _ B pin of the switching chip is electrically connected with the A3 pin of the second port.
7. The video signal switching circuit of claim 1, wherein: the control module is electrically connected with an SEL2 pin of the switching chip, and the control module is electrically connected with a B4 pin of the first port.
8. The video signal switching circuit of claim 1, wherein: the switching chip model is TS3DV642, and the control module is a single chip microcomputer.
9. A signal switching apparatus, characterized by: the video signal switching circuit according to any one of claims 1 to 8, wherein the number of the video signal switching circuits is two, and the two video signal switching circuits are an input circuit and an output circuit, and the input circuit and the output circuit are electrically connected.
10. The signal switching apparatus of claim 9, wherein: the output circuit comprises an output first port, an output switching chip, an output control module, an output second port and an output third port, and the input circuit comprises an input first port, an input switching chip, an input control module, an input second port and an input third port;
the output first port, the output second port and the output third port are electrically connected with the output switching chip respectively, the input first port, the input second port and the input third port are electrically connected with the input switching chip respectively, the output control module is electrically connected with the output switching chip and the output first port, and the input control module is electrically connected with the input switching chip and the input first port.
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| CN202020978807.3U CN212324235U (en) | 2020-05-30 | 2020-05-30 | Video signal switching circuit and signal switching equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112462102A (en) * | 2021-01-26 | 2021-03-09 | 长沙国通电力科技有限公司 | Portable electrical variable detection equipment with quick-connect plug |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462102A (en) * | 2021-01-26 | 2021-03-09 | 长沙国通电力科技有限公司 | Portable electrical variable detection equipment with quick-connect plug |
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