CN219761103U

CN219761103U - Signal switching device based on TYPE-C sharing digital video signal port

Info

Publication number: CN219761103U
Application number: CN202320457347.3U
Authority: CN
Inventors: 鲍家明
Original assignee: Shanghai Wingtech Information Technology Co Ltd
Current assignee: Shanghai Wingtech Information Technology Co Ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-09-26
Anticipated expiration: 2033-03-10

Abstract

The disclosure relates to a signal switching device based on a TYPE-C shared digital video signal port, which comprises a first TYPE-C port, a second TYPE-C port, a first multiplexing switch, a second multiplexing switch and a digital video signal port; the first TYPE-C port is electrically connected to a first TYPE input end and a second TYPE input end of the first multiplexing switch; the second TYPE-C port is electrically connected to the other first-TYPE input terminal and the other second-TYPE input terminal of the first multiplexing switch; the first multi-path selection switch is used for selecting and outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports; the first TYPE-C port is electrically connected to a third TYPE input end and a fourth TYPE input end of the second multiplexing switch; the second TYPE-C port is electrically connected to another third TYPE input terminal and another fourth TYPE input terminal of the second multiplexing switch; the second multiplexing switch is used for selectively outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports. This enables low cost applications.

Description

Signal switching device based on TYPE-C sharing digital video signal port

Technical Field

The disclosure relates to the technical field of port sharing, in particular to a signal switching device based on a TYPE-C shared digital video signal port.

Background

Currently, more and more products on the market are not limited to one TYPE-C Port, and two TYPE-C ports are derived and the same functional requirements are needed, but the number of ports of a signal receiving end (DisplayPort Receiver, DP RX) in a digital video signal interface (Display Port, DP) of some platforms is limited, so that the functional requirements of a plurality of TYPE-C ports can be affected to a certain extent.

Although, 2 is selected in the related art: the four-way analog switch of 1 realizes that a plurality of TYPE-C ports share one DP RX port, but the switch function of the switch is realized by setting additional power supply, external crystal and other structures, which is not beneficial to low-cost application.

Disclosure of Invention

To solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a signal switching device based on a TYPE-C shared digital video signal port.

The present disclosure provides a signal switching apparatus based on a TYPE-C shared digital video signal port, comprising:

a first TYPE-C port, a second TYPE-C port, a first multiplexing switch, a second multiplexing switch, and a digital video signal port;

the first TYPE-C port is electrically connected to a first TYPE input end and a second TYPE input end of the first multiplexing switch; the second TYPE-C port is electrically connected to another first TYPE input terminal and another second TYPE input terminal of the first multiplexing switch; the first multi-path selection switch is used for selecting and outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports;

the first TYPE-C port is electrically connected to a third TYPE input end and a fourth TYPE input end of the second multiplexing switch; the second TYPE-C port is electrically connected to another third TYPE input terminal and another fourth TYPE input terminal of the second multiplexing switch; the second multiplexing switch is used for selectively outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports.

Optionally, the signal switching device further includes:

the first multiplexing switch and the second multiplexing switch are both N: 1;

wherein N is an integer greater than or equal to 2.

Optionally, in the signal switching device:

the first TYPE-C port is connected to the first TYPE input end of the first multiplexing switch through a first signal transmission line and connected to the second TYPE input end of the first multiplexing switch through a second signal transmission line;

the second TYPE-C port is connected to the other first TYPE input terminal of the first multiplexing switch through a fifth signal transmission line, and to the other second TYPE input terminal of the first multiplexing switch through a sixth signal transmission line;

the first type input end is used for inputting a first type signal, and the second type input end is used for inputting a second type signal.

Optionally, in the signal switching device:

the first TYPE-C port is connected to the third TYPE input end of the second multiplexing switch through a third signal transmission line and connected to the fourth TYPE input end of the second multiplexing switch through a fourth signal transmission line;

the second TYPE-C port is connected to the other third TYPE input terminal of the second multiplexing switch through a seventh signal transmission line, and to the other fourth TYPE input terminal of the second multiplexing switch through an eighth signal transmission line;

the third type input end is used for inputting a third type signal, and the fourth type input end is used for inputting a fourth type signal.

Optionally, the first multiplexing switch further comprises a first type output terminal and a second type output terminal;

the first type output terminal is used for outputting the first type signal, and the second type output terminal is used for outputting the second type signal.

Optionally, in the signal switching device:

the first type output terminal is connected to the digital video signal port through a first type signal transmission line, and the second type output terminal is connected to the digital video signal port through a second type signal transmission line.

Optionally, the second multiplexing switch further includes a third type output terminal and a fourth type output terminal;

the third type output terminal is used for outputting the third type signal, and the fourth type output terminal is used for outputting the fourth type signal.

Optionally, in the signal switching device:

the third type output terminal is connected to the digital video signal port through a third type signal transmission line, and the fourth type output terminal is connected to the digital video signal port through a fourth type signal transmission line.

Alternatively, the process may be carried out in a single-stage,

the first multi-path selection switch further comprises a first gating control end;

the first gating control end is used for controlling to conduct the first signal transmission line and the second signal transmission line based on the high level of an external selection signal;

or for controlled conduction of the fifth signal transmission line and the sixth signal transmission line based on a low level of the external selection signal.

Alternatively, the process may be carried out in a single-stage,

the second multi-path selection switch further comprises a second gating control end;

the second gating control end is used for controlling to conduct the third signal transmission line and the fourth signal transmission line based on the high level of an external selection signal;

or for controlled conduction of the seventh signal transmission line and the eighth signal transmission line based on a low level of the external selection signal.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the signal switching device based on TYPE-C sharing digital video signal port provided by the embodiment of the disclosure comprises: a first TYPE-C port, a second TYPE-C port, a first multiplexing switch, a second multiplexing switch, and a digital video signal port; the first TYPE-C port is electrically connected to a first TYPE input end and a second TYPE input end of the first multiplexing switch; the second TYPE-C port is electrically connected to the other first-TYPE input terminal and the other second-TYPE input terminal of the first multiplexing switch; the first multi-path selection switch is used for selecting and outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports; the first TYPE-C port is electrically connected to a third TYPE input end and a fourth TYPE input end of the second multiplexing switch; the second TYPE-C port is electrically connected to another third TYPE input terminal and another fourth TYPE input terminal of the second multiplexing switch; the second multiplexing switch is used for selectively outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports. Thus, the embodiment of the disclosure does not need to set other components and additional power supplies, and the signals of the first TYPE-C port and the second TYPE-C port are switched by using the first multiplexing switch and the second multiplexing switch, so that the digital video signal port is shared by a plurality of TYPE-C ports, and the requirement of low-cost application is met.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram of a frame structure of a signal switching device based on a TYPE-C shared digital video signal port according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of pin connection of a first multiplexing switch according to an embodiment of the disclosure;

fig. 3 is a schematic diagram of pin connection of a second multiplexing switch according to an embodiment of the disclosure.

110, a first TYPE-C port; 120. a second TYPE-C port; 210. a first multiplexing switch; 220. a second multiplexing switch; 310. a digital video signal port; 411 and 412, first type inputs; 421 and 422, second type inputs; 431 and 432, third type of input; 441 and 442, fourth type input.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

First, the defects of the related art will be briefly described.

Currently, TYPE-C products in the market are continuously rising, and based on a plurality of products having corresponding TYPE-C interface technologies, connection is generally established by using TYPE-C ports and digital video signal interfaces (DP) of certain platforms so as to transmit low-bandwidth data such as voice, video and the like. Some products are not limited to one TYPE-C Port, and two or more TYPE-C ports with the same functional requirements are required, but the limited number of ports of the signal receiving end (DisplayPort Receiver, DP RX) in the digital video signal interface (Display Port, DP) affects the functional requirements of the TYPE-C ports.

In the related art, in the case of using 2: on the basis of the four-channel analog switch, the four-channel analog switch is often additionally powered based on a power supply related to the switch, and the switching requirement of the switch is realized by arranging an external crystal oscillator and other structures in a circuit.

In view of one of the above drawbacks, an embodiment of the present disclosure provides a signal switching apparatus based on a TYPE-C shared digital video signal port, including: a first TYPE-C port, a second TYPE-C port, a first multiplexing switch, a second multiplexing switch, and a digital video signal port; the first TYPE-C port is electrically connected to a first TYPE input end and a second TYPE input end of the first multiplexing switch; the second TYPE-C port is electrically connected to the other first-TYPE input terminal and the other second-TYPE input terminal of the first multiplexing switch; the first multi-path selection switch is used for selecting and outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports; the first TYPE-C port is electrically connected to a third TYPE input end and a fourth TYPE input end of the second multiplexing switch; the second TYPE-C port is electrically connected to another third TYPE input terminal and another fourth TYPE input terminal of the second multiplexing switch; the second multiplexing switch is used for selectively outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal ports. Thus, the embodiment of the disclosure does not need to set other components and additional power supplies, and the signals of the first TYPE-C port and the second TYPE-C port are switched by using the first multiplexing switch and the second multiplexing switch, so that the digital video signal port is shared by a plurality of TYPE-C ports, and the requirement of low-cost application is met.

The signal switching apparatus based on the TYPE-C sharing digital video signal port provided in the embodiments of the present disclosure is described below with reference to the accompanying drawings.

Fig. 1 is a schematic frame structure diagram of a signal switching device based on a TYPE-C shared digital video signal port according to an embodiment of the disclosure. Referring to fig. 1, the signal switching apparatus includes: a first TYPE-C port 110, a second TYPE-C port 120, a first multiplexing switch 210, a second multiplexing switch 220, and a digital video signal port 310; the first TYPE-C port 110 is electrically connected to a first TYPE input 411 and a second TYPE input 421 of the first multiplexing switch 210; the second TYPE-C port 120 is electrically connected to another first TYPE input 412 and another second TYPE input 422 of the first multiplexing switch 210; the first multiplexing switch 210 is used for selectively outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal port 310; the first TYPE-C port 110 is electrically connected to a third TYPE input 431 and a fourth TYPE input 441 of the second multiplexing switch 220; the second TYPE-C port 120 is electrically connected to another third TYPE input 432 and another fourth TYPE input 442 of the second multiplexing switch 220; the second multiplexing switch 220 is used to select and output a signal corresponding to the TYPE-C port and is electrically connected to the digital video signal port 310.

It should be noted that, the first TYPE input 411 and the other first TYPE input 412 have the same function, and only one first TYPE input is connected to the first TYPE-C port 110, the other first TYPE input is connected to the second TYPE-C port 120, and the second TYPE input, the third TYPE input and the fourth TYPE input can be understood according to the rule of distinguishing the first TYPE input, which is not described herein.

In addition, taking the structure shown in fig. 1 as an example, the positions where the vias intersect in fig. 1 (the points where they intersect in fig. 1) are not electrically connected, and only represent that there is a staggered relationship in spatial positions.

The signal receiving terminal (DisplayPort Receiver, DP RX) in the digital video signal Port 310 (Display Port, DP) is configured to receive the DP signal input by the TYPE-C Port. Illustratively, the digital video signal port 310 may reside on a liquid crystal controller, a notebook computer, a stand-alone graphics card, or other integrated chip, without limitation.

Wherein the first TYPE-C port 110 is used for simultaneously transmitting the DP signal to the digital video signal port 310 through the first multiplexing switch 210 and the second multiplexing switch 220 in combination. Illustratively, taking the structure shown in fig. 1 as an example, a first TYPE input terminal 411 and a second TYPE input terminal 421 of the first multiplexing switch 210 are respectively connected to the first TYPE-C port 110, a third TYPE input terminal 431 and a fourth TYPE input terminal 441 of the second multiplexing switch 220 are respectively connected to the first TYPE-C port 110, and based on the four signal paths formed, the first multiplexing switch 210 and the second multiplexing switch 220 are selectively turned on, thereby further realizing that the first TYPE-C port 110 simultaneously transmits four-channel DP signals to the digital video signal port 310 through the first multiplexing switch 210 and the second multiplexing switch 220 in combination.

In combination with the first TYPE-C port 110 above, the second TYPE-C port 120 is used to simultaneously transmit DP signals to the digital video signal port 310 through the combination of the first multiplexing switch 210 and the second multiplexing switch 220. The signal transmission principles of the first TYPE-C port 110 and the second TYPE-C port 120 are the same, and will not be described herein.

It should be understood that when the first multiplexing switch 210 and the second multiplexing switch 220 are used to output signals corresponding to TYPE-C ports together, the corresponding TYPE-C ports are identical TYPE-C ports, such as the first TYPE-C port 110 (or the second TYPE-C port 120). Illustratively, the first multiplexing switch 210 may select two paths that are connected to the first TYPE-C port 110, and at this time, the second multiplexing switch 220 also switches on two paths that are connected to the first TYPE-C port 110. It should be noted that, the first multiplexing switch 210 and the second multiplexing switch 220 also need to be selectively turned on based on other signals input from the outside, and a specific conduction process is described in the following exemplary manner.

Wherein the first multiplexing switch 210 has two inputs of the first TYPE and two inputs of the second TYPE based on the first TYPE-C port 110 and the second TYPE-C port 120 having the same functional requirements. Specifically, the first type input end and the second type input end are respectively two pins of different types, and are respectively connected with different types of signal paths.

Similarly, the second multiplexing switch 220 has two third type inputs and two fourth type inputs, which will be understood from the explanation of the first multiplexing switch 210 and will not be described herein.

In other embodiments, any type of multiplexing switch known to those skilled in the art may be used, and the switching function provided by the embodiments of the present disclosure may be implemented, which is not limited herein.

It should be noted that, the electrical connection referred to herein is implemented by using a conductive path, and the first multiplexing switch 210 and the second multiplexing switch 220 switch paths to implement signal transmission, and a specific connection relationship is described in the following exemplary manner.

The signal switching device based on TYPE-C sharing digital video signal port provided by the embodiment of the disclosure comprises: a first TYPE-C port 110, a second TYPE-C port 120, a first multiplexing switch 210, a second multiplexing switch 220, and a digital video signal port 310; the first TYPE-C port 110 is electrically connected to a first TYPE input 411 and a second TYPE input 421 of the first multiplexing switch 210; the second TYPE-C port 120 is electrically connected to another first TYPE input 412 and another second TYPE input 422 of the first multiplexing switch 210; the first multiplexing switch 210 is used for selectively outputting signals corresponding to the TYPE-C ports and is electrically connected to the digital video signal port 310; the first TYPE-C port 110 is electrically connected to a third TYPE input 431 and a fourth TYPE input 441 of the second multiplexing switch 220; the second TYPE-C port 120 is electrically connected to another third TYPE input 432 and another fourth TYPE input 442 of the second multiplexing switch 220; the second multiplexing switch 220 is used to select and output a signal corresponding to the TYPE-C port and is electrically connected to the digital video signal port 310. Thus, in the embodiment of the present disclosure, other components and additional power supplies are not required to be set, signals of the first TYPE-C port 110 and the second TYPE-C port 120 are switched by using the first multiplexing switch 210 and the second multiplexing switch 220, so that a plurality of TYPE-C ports share a digital video signal port, and the requirement of low-cost application is satisfied.

In some embodiments, referring to fig. 1, in the signal switching apparatus: the first multiplexing switch 210 and the second multiplexing switch 220 are each N: 1; wherein N is an integer greater than or equal to 2.

Wherein, analog switch is N:1 the ratio for implementing the input and output paths is N:1. for example, when three TYPEs of TYPE-C ports having the same functional requirement are provided, the analog switch may be 3:1, or when two TYPEs of TYPE-C ports having the same functional requirement are provided, the analog switch may be 2:1, and may be set according to the actual on requirement, which is not limited herein.

In some embodiments, referring to fig. 1, in the signal switching apparatus: the first TYPE-C port 110 is connected to a first TYPE input 411 of the first multiplexing switch 210 through a first signal transmission line, and to a second TYPE input 421 of the first multiplexing switch 210 through a second signal transmission line; the second TYPE-C port 120 is connected to another first TYPE input terminal 412 of the first multiplexing switch 210 through a fifth signal transmission line, and to another second TYPE input terminal 422 of the first multiplexing switch 210 through a sixth signal transmission line; the first type input end is used for inputting a first type signal, and the second type input end is used for inputting a second type signal.

The first TYPE-C port 110 and the second TYPE-C port 120 have the same functional requirements, that is, four-channel DP signals are required to be transmitted. For example, in an actual circuit, four data paths (corresponding to signal paths) of the DP signal are generally represented by lane 0, lane1, lane 2, and lane3, and illustratively, a first signal transmission line corresponds to lane 0 of the first TYPE-C port 110, a second signal transmission line corresponds to lane1 of the first TYPE-C port 110, and similarly, a fifth signal transmission line corresponds to lane 0 of the second TYPE-C port 120, and a sixth signal transmission line corresponds to lane1 of the second TYPE-C port 120.

As can be appreciated from a combination of lane 0 and lane1 above, it is herein understood that to represent the correspondence between the data paths and the input pins of the first multiplexer 210, the first type of input terminal is represented as a pin for inputting a first type of signal, the second type of input terminal is represented as a pin for inputting a second type of signal, the first type of signal may represent a signal transmitted by lane 0, and the second type of signal may represent a signal transmitted by lane 1.

In some embodiments, referring to fig. 1, the first TYPE-C port 110 is connected to a third TYPE input 431 of the second multiplexing switch 220 through a third signal transmission line, and to a fourth TYPE input 441 of the second multiplexing switch 220 through a fourth signal transmission line; the second TYPE-C port 120 is connected to another third TYPE input 432 of the second multiplexing switch 220 through a seventh signal transmission line, and to another fourth TYPE input 442 of the second multiplexing switch 220 through an eighth signal transmission line; the third type input end is used for inputting a third type signal, and the fourth type input end is used for inputting a fourth type signal.

The first TYPE-C port 110 and the second TYPE-C port 120 have the same functional requirements, that is, four-channel DP signals are required to be transmitted. In combination with the first multiplexing switch 210, it can be seen that, in the actual circuit, four data paths (corresponding to signal paths) of the DP signal are generally represented by the lane 0, the lane1, the lane 2 and the lane3, and the third signal transmission line corresponds to the lane 2 of the first TYPE-C port 110, the fourth signal transmission line corresponds to the lane3 of the first TYPE-C port 110, and the seventh signal transmission line corresponds to the lane 2 of the second TYPE-C port 120, and the eighth signal transmission line corresponds to the lane3 of the second TYPE-C port 120.

As can be appreciated from a combination of lane 2 and lane3 above, it is herein understood that to represent the correspondence between the data paths and the input pins of the second multiplexer 220, the third type of input is represented as a pin for inputting a third type of signal, the fourth type of input is represented as a pin for inputting a fourth type of signal, the third type of signal may represent a signal transmitted by lane 2, and the fourth type of signal may represent a signal transmitted by lane 3.

In some embodiments, the first multiplexing switch 210 further comprises a first type of output and a second type of output; the first type output terminal is used for outputting a first type signal, and the second type output terminal is used for outputting a second type signal.

Specifically, when the first multiplexing switch 210 selects and turns on two data paths corresponding to the first TYPE-C port 110 or the second TYPE-C port 120, signals on the two data paths are correspondingly output. Illustratively, when the first multiplexing switch 210 selects and turns on the lane 0 (corresponding to the first signal transmission line) and the lane1 (corresponding to the second signal transmission line) corresponding to the first TYPE-C port 110, the first TYPE signal is output through the first TYPE output terminal, and the second TYPE signal is output through the second TYPE output terminal.

In some embodiments, referring to fig. 1, in the signal switching apparatus: the first type output terminal is connected to the digital video signal port through a first type signal transmission line, and the second type output terminal is connected to the digital video signal port through a second type signal transmission line.

As can be seen from the above output terminal of the first multiplexing switch 210, the first type output terminal transmits the first type signal to the digital video signal port through the first type signal transmission line; the second type output end transmits a second type signal to the digital video signal port through a second type signal transmission line.

It will be appreciated that in an actual circuit, the first type of signal transmission line represents the corresponding output lane 0 and the second type of signal transmission line represents the corresponding output lane 1.

In some embodiments, referring to fig. 1, the second multiplexing switch 220 further comprises a third type of output and a fourth type of output; the third type output terminal is used for outputting a third type signal, and the fourth type output terminal is used for outputting a fourth type signal.

Specifically, when the second multiplexing switch 220 selects and turns on two data paths corresponding to the first TYPE-C port 110 or the second TYPE-C port 120, signals on the two data paths are correspondingly output. Illustratively, when the second multiplexing switch 220 selects and turns on the lane 2 (corresponding to the third signal transmission line) and the lane3 (corresponding to the fourth signal transmission line) corresponding to the first TYPE-C port 110, the third TYPE signal is output through the third TYPE output terminal, and the fourth TYPE signal is output through the fourth TYPE output terminal.

In some embodiments, referring to fig. 1, in the signal switching apparatus: the third type output terminal is connected to the digital video signal port through a third type signal transmission line, and the fourth type output terminal is connected to the digital video signal port through a fourth type signal transmission line.

As can be seen from the above output terminal of the second multiplexing switch 220, the third type output terminal transmits the third type signal to the digital video signal port through the third type signal transmission line; the fourth type output terminal transmits a fourth type signal to the digital video signal port through a fourth type signal transmission line.

It will be appreciated that in an actual circuit, the third type of signal transmission line represents a corresponding output lane 2 and the fourth type of signal transmission line represents a corresponding output lane 3.

In some embodiments, the first multiplexing switch 210 further includes a first gating control terminal (not shown); the first gating control end is used for controlling to conduct the first signal transmission line and the second signal transmission line based on the high level of the external selection signal; or for controlled turn-on of the fifth signal transmission line and the sixth signal transmission line based on a low level of an external selection signal.

Wherein the external selection signal is from a device or means with a digital video signal port 310. In an actual circuit, the selection signal is generally referred to as a select signal, and when the select signal is at a high level, the first gate control terminal is controlled to turn on lane 0 corresponding to the first signal transmission line and lane1 corresponding to the second signal transmission line; alternatively, when the select signal is at a low level, the first gate control terminal is controlled to turn on Lane 0 corresponding to the fifth signal transmission line and Lane1 corresponding to the sixth signal transmission line.

In some embodiments, the second multiplexing switch 220 further includes a second gating control terminal (not shown); the second gating control end is used for controlling to conduct the third signal transmission line and the fourth signal transmission line based on the high level of the external selection signal; or for controlled conduction of the seventh signal transmission line and the eighth signal transmission line based on a low level of the external selection signal.

In combination with the first gate control terminal, the external selection signal input to the first gate control terminal and the external selection signal input to the second gate control terminal are the same external selection signal. Also, in the actual circuit, when the select signal is at a high level, the second gate control terminal is controlled to turn on lane 2 corresponding to the third signal transmission line and lane3 corresponding to the fourth signal transmission line; alternatively, when the select signal is at a low level, the second gate control terminal is controlled to turn on lane 2 corresponding to the seventh signal transmission line and lane3 corresponding to the eighth signal transmission line.

Fig. 2 is a schematic diagram of pin connection of a first multiplexing switch according to an embodiment of the disclosure. Referring to fig. 2, the various pins and corresponding connected signal paths of the first multiplexing switch are shown. For example, when the select signal is high, pins 3 and 4 correspond to data paths to which pins 15 and 14 are connected, and pins 7 and 8 correspond to data paths to which pins 13 and 13 are connected; similarly, when the select signal is low, pins 3 and 4 correspond to the data paths to which pins 19 and 18 are connected, and pins 7 and 8 correspond to the data paths to which pins 17 and 16 are connected.

Fig. 3 is a schematic diagram of pin connection of a second multiplexing switch according to an embodiment of the disclosure. The explanation of the first multiplexing switch pin can be understood herein, and will not be repeated here.

It should be noted that, pins 12 to 19 in fig. 2 are pins for connecting with a TYPE-C port, such as the first TYPE-C port, pins 3, 4, 7 and 8 are pins for connecting with a DP RX port, pin 9 is a pin for inputting an external selection signal, and other pins except for this are conventional pins connected to ground or a power supply. Here, the pins in fig. 3 are different from the pins in fig. 2, and will not be described in detail.

Illustratively, table 1 is a truth table for the first and second multiplexing switch functions provided by embodiments of the present disclosure, as shown in table 1 below:

table 1 truth table

Function	Select signal SEL	Ground signal PD
			A _N to B _N	L	L
A _N to C _N	H	L
			All Switches Hi-z	x	H

Wherein, based on Table 1, L represents low level, H represents high level, PD in Table 1 represents the 2-pin signal in FIGS. 2 and 3, SEL represents external selection signal (simply referred to as selection signal), A _N to B _N The conducting direction of the pins in the representative diagrams of fig. 2 and 3 is a _N to B _N ，A _N to C _N The conducting direction of the pins in the representative diagrams of fig. 2 and 3 is a _N to C _N All switches hi-z represent All possible switches, it being noted that the subscript N in table 1 represents a value of 0 or 1.

In addition, the selection signal in table 1 is x, which represents an indeterminate level value, and since pin 2 in fig. 2 and 3 is grounded in use, PD is low (L).

Referring to Table 1, as an example, taking the first multi-way switch in FIG. 2 as an example, when the select signal is low, the conduction direction is A ₀ to B ₀ And A ₁ to B ₁ Thereby realizing the conduction function of the switch. Here, the conduction rule of the second multiplexing switch in fig. 3 is similar to that of the first multiplexing switch in fig. 2, and it can be understood based on the above conduction rule, and the description thereof will not be repeated here. It should be noted that, table 1 is only for illustrating the functions of the switches, and the specific working principles of the first multiplexing switch 210 and the second multiplexing switch 220 provided in the embodiments of the present disclosure may be understood according to the data paths that are actually turned on.

Accordingly, when the external selection signal is at the high level, the first multiplexing switch 210 and the second multiplexing switch 220 transmit the DP signal of the first TYPE-C port 110, and turn on the lane 0, the lane1, the lane 2 and the lane3 corresponding to the first TYPE-C port 110, and switch to the digital video signal port 310; when the external selection signal is at the low level, the first multiplexing switch 210 and the second multiplexing switch 220 transmit the DP signal of the second TYPE-C port 120, and turn on the lane 0, lane1, lane 2 and lane3 corresponding to the second TYPE-C port 120, and switch to the digital video signal port 310. Accordingly, two TYPE-C ports share one DP RX port.

It should be noted that, the signal switching device provided by the embodiment of the disclosure performs the path switching based on only two analog switches, is simple to implement and has lower power consumption, and certain advantages are occupied under the condition that the DP RX port of the platform end is limited.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A signal switching apparatus based on TYPE-C sharing digital video signal port, comprising:

2. The signal switching apparatus of claim 1 wherein the first multiplexing switch and the second multiplexing switch are each N: 1;

wherein N is an integer greater than or equal to 2.

3. The signal switching apparatus of claim 1 wherein the first TYPE-C port is connected to the first TYPE input of the first multiplexing switch by a first signal transmission line and to the second TYPE input of the first multiplexing switch by a second signal transmission line;

4. The signal switching apparatus of claim 1 wherein the first TYPE-C port is connected to the third TYPE input of the second multiplexing switch by a third signal transmission line and to the fourth TYPE input of the second multiplexing switch by a fourth signal transmission line;

5. The signal switching apparatus of claim 3 wherein said first multiplexing switch further comprises a first type output and a second type output;

6. The signal switching apparatus of claim 5 wherein the first type of output is connected to the digital video signal port via a first type of signal transmission line and the second type of output is connected to the digital video signal port via a second type of signal transmission line.

7. The signal switching apparatus of claim 4 wherein the second multiplexing switch further comprises a third type of output and a fourth type of output;

8. The signal switching apparatus of claim 7 wherein the third type of output is connected to the digital video signal port through a third type of signal transmission line and the fourth type of output is connected to the digital video signal port through a fourth type of signal transmission line.

9. The signal switching apparatus of claim 3 wherein said first multiplexing switch further comprises a first gating control terminal;

10. The signal switching apparatus of claim 4 wherein said second multiplexing switch further comprises a second gating control terminal;