CN111984569A - Interface switching circuit and electronic device using the interface switching circuit - Google Patents

Abstract

An electronic device includes a video data output module and an interface switching circuit, wherein the interface switching circuit is electrically connected to the video data output module. The interface switching circuit includes a first type communication interface, a second type communication interface and a switching control module. The switching control module is electrically connected between the first type communication interface and the second type communication interface, and the switching control module is also electrically connected with the video data output module to receive video data. When the first type of communication interface is electrically plugged into the display screen having the first type of communication interface, the switching control module sends video data to the display screen for display through the first type of communication interface. When the second-type communication interface is electrically plugged into the display screen having the second-type communication interface, the switching control module sends the video data to the display screen for display through the first-type communication interface. In this way, it is convenient for users to use.

Description

Interface switching circuit and electronic device using the interface switching circuit

technical field

The invention relates to the field of computers, in particular to an interface switching circuit and an electronic device using the interface switching circuit.

Background technique

Generally speaking, a notebook computer is usually designed with one or more display ports (DP) to be electrically connected with the electronic devices equipped with the display ports. There is also a growing need to design Thunderbolt interfaces on laptops.

However, when only the Thunderbolt interface is configured on the notebook computer to transmit signals, a communication connection cannot be established with the electronic device configured with the DP interface, which causes inconvenience to the user.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide an interface switching circuit and an electronic device applying the switching circuit, so that the electronic device can switch between the DP interface and the Thunderbolt interface, which is convenient to use.

An interface switching circuit, the interface switching circuit is electrically connected to a video data output module for receiving video data output by the video data output module, the interface switching circuit comprises a first type communication interface and a second type communication interface and a switching control module; the switching control module is electrically connected between the first type communication interface and the second type communication interface, and the switching control module is also electrically connected with the video data output module for use in receiving the video data output by the video data output module;

When the first type of communication interface is electrically plugged into a display screen having the first type of communication interface, the switching control module sends the video data to the display screen for display through the first type of communication interface ;as well as

When the second-type communication interface is electrically plugged into the display screen having the second-type communication interface, the switching control module sends the video data to the display screen for display through the second-type communication interface .

Further, the switching control module further includes a switching control chip, a first capacitor to a tenth capacitor, and the switching control chip includes a first data pin to an eighth data pin and a first signal pin to a second signal pin. pin, a first detection pin and a first ground pin, the second type of communication interface includes a first data pin to an eighth data pin, a first signal pin to a second signal pin and a detection pin pin, the first data pin to the eighth data pin of the switching control chip are respectively electrically connected to the first data pin to the eighth data pin of the second type communication interface through the first capacitor to the eighth capacitor. Eight data pins, the first signal pin to the second signal pin of the switching control chip are respectively electrically connected to the first signal pin to the second signal pin of the second type communication interface, the The first detection pin of the switching control chip is electrically connected to the detection pin of the second type communication interface, and the first ground pin of the switching control chip is grounded.

Further, the switching control chip also includes the ninth data pin to the sixteenth data pin, the third signal pin to the fourth signal pin, the second detection pin and the second ground pin, the The ninth data pin to the sixteenth data pin, the third signal pin to the fourth signal pin and the second detection pin are electrically connected to the video data output module, and the second ground pin is grounded.

Further, the switching control module includes eleventh capacitors to eighteenth capacitors and resistors, and the switching control chip includes the seventeenth data pins to the twenty-fourth data pins, and the fifth signal pins to the sixth data pins. a signal pin, a third detection pin and a third ground pin, the first type of communication interface includes a first data pin to an eighth data pin, a first signal pin to a second signal pin and a detection pin The seventeenth data pin to the twenty-fourth data pin of the switching control chip are respectively electrically connected to the first type communication interface through the first capacitor to the eighth capacitor. The first data pin to the eighth data pin, the fifth signal pin to the sixth signal pin of the switching control chip are respectively electrically connected to the first signal pin to the sixth signal pin of the first type communication interface. Two signal pins, the third detection pin of the switching control chip is electrically connected to the detection pin of the first type communication interface, and the third detection pin of the switching control chip also passes through the resistor Grounding, the third grounding pin of the switching control chip is grounded.

Further, the switching control module further includes a nineteenth capacitor, the switching control chip further includes a power supply pin, the power supply pin is electrically connected to a power supply, and the power supply pin is also grounded through the nineteenth capacitor .

Further, the power supply is used to output a voltage of 5V.

Further, the first type of communication interface is a DP interface, and the second type of communication interface is a thunderbolt interface.

An electronic device comprising a video data output module and the interface switching circuit described above.

Further, the video data output module is a motherboard, and the electronic device is a notebook computer.

The above interface switching circuit and the electronic device using the interface switching circuit detect the plugging state of the first type communication interface and the second type communication interface through the switching control chip, and switch the first type The communication interface and the connection between the second type of communication interface and the video data output module are used to output video data to the display screen, which is convenient for users to use.

Description of drawings

FIG. 1 is a block diagram of a preferred embodiment of the electronic device of the present invention.

FIG. 2 is a block diagram of a preferred embodiment of the interface switching circuit in FIG. 1 .

FIG. 3 is a block diagram showing the connection of an interface switching circuit with a display screen having a first type of communication interface.

FIG. 4 is a block diagram showing the connection of the interface switching circuit with the display screen having the second type of communication interface.

FIG. 5 is a circuit diagram of a preferred embodiment of the interface switching circuit in FIG. 1 .

Description of main component symbols

Electronic Devices 100

Interface switching circuit 10

Switch Control Module 12

Switch control chip 122

Type 1 communication interface 14, 32

The second type of communication interface 16, 34

Video data output module 20

Display 30

Power V1

Capacitors C1-C19

Resistor R1

The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the following will describe the interface switching circuit and the electronic device using the interface switching circuit in the present invention in detail and related aspects with reference to the accompanying drawings and embodiments. illustrate.

Please refer to FIG. 1 , a preferred embodiment of the present invention provides an electronic device 100 . The electronic device 100 includes an interface switching circuit 10 and a video data output module 20 .

The interface switching circuit 10 is electrically connected to the video data output module 20 for receiving video data output from the video data output module 20 . The interface switching circuit 10 is also used for electrical connection with the display screen 30 to transmit the video data to the display screen 30 for display.

In this embodiment, the electronic device 100 can be a notebook computer, and in other embodiments, the electronic device 100 can also be other electronic devices. The video data output module 20 can be a mainboard.

Please refer to FIG. 2 , which is a block diagram of a preferred embodiment of the interface switching circuit 10 of the present invention. The interface switching circuit 10 includes a switching control module 12 , a first-type communication interface 14 and a second-type communication interface 16 . In this embodiment, the first type of communication interface 14 may be a DP interface, and the second type of communication interface 16 may be a thunderbolt interface.

Specifically, in the embodiment of the present application, the switching control module 12 is electrically connected between the first type communication interface 14 and the second type communication interface 16 . The switching control module 12 is also electrically connected to the video data output module 20 to receive the video data output by the video data output module 20 .

Referring to FIG. 3 , when the display screen 30 has a first-type communication interface 32 (eg, a DP interface), the electronic device 100 can electrically communicate with the first-type communication interface 32 through the first-type communication interface 14 It can be plugged and connected to establish a communication connection with the display screen 30 . At this time, the switching control module 12 detects the plug-in state of the first type communication interface 14 and the display screen 30, so the switching control module 12 communicates the video data through the first type communication The interface 14 is sent to the display screen 30 for display.

Referring to FIG. 4 , when the display screen 30 has a second-type communication interface 34 (eg, a thunderbolt interface), the electronic device 100 can electrically communicate with the second-type communication interface 34 through the second-type communication interface 16 It can be plugged and connected to establish a communication connection with the display screen 30 . At this time, the switching control module 12 detects the plug-in state of the second-type communication interface 16 and the display screen 30, and thus, the switching control module 12 communicates the video data through the second-type communication The interface 16 is sent to the display screen 30 for display.

Please refer to FIG. 5 , which is a circuit diagram of a preferred embodiment of the interface switching circuit 10 according to the present application. The switching control module 12 may include a switching control chip 122, nineteen capacitors C1-C19 and a resistor R1. The switching control chip 122 includes twenty-four data pins D1-D24, six signal pins S1-S6, three detection pins Z1-Z3, three ground pins G1-G3 and power supply pins pin PWR. The first type communication interface 14 includes eight data pins D25-D32, two signal pins S7-S8 and a detection pin Z4. The second type of communication interface 16 includes eight data pins D33-D40, two signal pins S9-S10 and a detection pin Z5.

The eight data pins D1-D8 of the switching control chip 122 are respectively electrically connected to the eight data pins D33-D40 of the second type communication interface 16 through the capacitors C1-C8, and the two data pins D33-D40 of the switching control chip 122 are respectively electrically connected. The signal pins S1-S2 are respectively electrically connected to the two signal pins S9-S10 of the second type communication interface 16 through capacitors C9-C10, and the detection pin Z1 of the switching control chip 122 is electrically connected to the two signal pins S9-S10 of the second type communication interface 16. The detection pin Z5 of the second type of communication interface 16 is described. The data pins D9-D16, the signal pins S3-S4 and the detection pin Z2 of the switching control chip 122 are electrically connected to the video data output module 20. The eight data pins D17-D24 of the switching control chip 122 are respectively electrically connected to the eight data pins D25-D32 of the first type communication interface 14 through eight capacitors C11-C18, and the switching control chip 122 The two signal pins S5-S6 are respectively electrically connected to the two signal pins S7-S8 of the first type communication interface 14, and the detection pin Z3 of the switching control chip 122 is electrically connected to the first type communication interface 14. The detection pin Z4 of the type communication interface 14 . The detection pin Z3 of the switching control chip 122 is also grounded through the resistor R1. The ground pins G1-G3 of the switching control chip 122 are grounded respectively. The power supply pin PWR of the switching control chip 122 is electrically connected to the power supply V1, and the power supply pin PWR of the switching control chip 122 is also grounded through the capacitor C19.

In this embodiment, the power supply V1 is used to output a voltage of 5V.

The working principle of the interface switching circuit 10 of the present invention will be described in detail below.

During operation, when the display screen 30 has the first type communication interface 32, the first type communication interface 14 of the electronic device 100 is electrically plugged into the first type communication interface 32 of the display screen 30, at this time The electronic device 100 establishes a communication connection with the display screen 30, and the switching control chip 122 will receive the video data output by the video data output module 20 through eight data signal pins D9-D16, and pass the eight data signal pins D9-D16. Pins D17-D24 transmit the video data to the eight data pins D25-D32 of the first type communication interface 14 . At this time, the electronic device 100 can send the video data to the display screen 30 for display through the first type of communication interface 14 .

When the display screen 30 has the second type communication interface 34, the second type communication interface 16 of the electronic device 100 is electrically connected to the second type communication interface 34 of the display screen 30, and the electronic The device 100 establishes a communication connection with the display screen 30, and the switching control chip 122 will receive the video data output by the video data output module 20 through eight data signal pins D9-D16, and pass the eight data pins D1. -D8 transmits the video data to the eight data pins D33-D40 of the second type of communication interface 16. At this time, the electronic device 100 can send the video data to the display screen 30 for display through the second-type communication interface 16 .

The above-mentioned interface switching circuit 10 and the electronic device 100 using the interface switching circuit 10 detect the plugging state of the first type communication interface 14 and the second type communication interface 16 through the switching control chip 122 , and The connections between the first type communication interface 14 and the second type communication interface 16 and the video data output module 20 are switched to output video data to the display screen 30 for the convenience of the user.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them, although the present invention has been described in detail with reference to the preferred embodiments.

Those skilled in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

In addition, based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts will fall within the protection scope of the present invention.

Claims (9)

1. An interface switching circuit is electrically connected with a video data output module and used for receiving video data output by the video data output module, and is characterized by comprising a first type communication interface, a second type communication interface and a switching control module; the switching control module is electrically connected between the first type communication interface and the second type communication interface, and is also electrically connected with the video data output module so as to be used for receiving the video data output by the video data output module;

When the first type communication interface is electrically connected with a display screen with the first type communication interface in an inserting mode, the switching control module sends the video data to the display screen through the first type communication interface for displaying; and

when the second type communication interface is electrically connected with a display screen with the second type communication interface in an inserting mode, the switching control module sends the video data to the display screen through the second type communication interface to be displayed.

2. The interface switching circuit according to claim 1, wherein the switching control module further comprises a switching control chip, a first capacitor to a tenth capacitor, the switching control chip comprises a first data pin to an eighth data pin, a first signal pin to a second signal pin, a first detection pin and a first ground pin, the second-type communication interface comprises a first data pin to an eighth data pin, a first signal pin to a second signal pin and a detection pin, the first data pin to the eighth data pin of the switching control chip are electrically connected to the first data pin to the eighth data pin of the second-type communication interface through the first capacitor to the eighth capacitor, respectively, the first signal pin to the second signal pin of the switching control chip are electrically connected to the first signal pin to the second signal pin of the second-type communication interface, respectively, the first detection pin of the switching control chip is electrically connected to the detection pin of the second type communication interface, and the first grounding pin of the switching control chip is grounded.

3. The interface switching circuit according to claim 2, wherein the switching control chip further comprises a ninth data pin to a sixteenth data pin, a third signal pin to a fourth signal pin, a second detection pin and a second ground pin, the ninth data pin to the sixteenth data pin, the third signal pin to the fourth signal pin and the second detection pin are electrically connected to the video data output module, and the second ground pin is grounded.

4. The interface switching circuit according to claim 3, wherein the switching control module comprises an eleventh capacitor to an eighteenth capacitor and a resistor, the switching control chip comprises a seventeenth data pin to a twenty-fourth data pin, a fifth signal pin to a sixth signal pin, a third detection pin and a third ground pin, the first type communication interface comprises a first data pin to an eighth data pin, a first signal pin to a second signal pin and a detection pin, the seventeenth data pin to the twenty-fourth data pin of the switching control chip are electrically connected to the first data pin to the eighth data pin of the first type communication interface through the first capacitor to the eighth capacitor, respectively, the fifth signal pin to the sixth signal pin of the switching control chip are electrically connected to the first signal pin to the second signal pin of the first type communication interface, respectively, the third detection pin of the switching control chip is electrically connected to the detection pin of the first type communication interface, the third detection pin of the switching control chip is also grounded through the resistor, and the third grounding pin of the switching control chip is grounded.

5. The interface switching circuit of claim 4, wherein the switching control module further comprises a nineteenth capacitor, the switching control chip further comprising a power pin, the power pin being electrically connected to a power supply, the power pin also being grounded through the nineteenth capacitor.

6. The interface switching circuit of claim 5, wherein the power supply is configured to output a voltage of 5V.

7. The interface switching circuit of claim 1 wherein the first type of communication interface is a DP interface and the second type of communication interface is a lightning interface.

8. An electronic device, comprising a video data output module and the interface switching circuit according to any one of claims 1 to 7.

9. The electronic device of claim 8, wherein the video data output module is a motherboard and the electronic device is a notebook computer.

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