CN111984569A - Interface switching circuit and electronic device using same - Google Patents
Interface switching circuit and electronic device using same Download PDFInfo
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- CN111984569A CN111984569A CN201910426160.5A CN201910426160A CN111984569A CN 111984569 A CN111984569 A CN 111984569A CN 201910426160 A CN201910426160 A CN 201910426160A CN 111984569 A CN111984569 A CN 111984569A
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- 238000001514 detection method Methods 0.000 claims description 27
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000010586 diagram Methods 0.000 description 7
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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- Computer Hardware Design (AREA)
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
An electronic device comprises a video data output module and an interface switching circuit, wherein the interface switching circuit is electrically connected with the video data output module. The interface switching circuit comprises 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 to receive video data. 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 video data to the display screen through the first type communication interface to display. 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 first type communication interface to be displayed. Therefore, the use of the device is convenient for users.
Description
Technical Field
The present invention relates to the field of computers, and in particular, to an interface switching circuit and an electronic device using the same.
Background
Generally, one or more Display Ports (DP) are designed on a notebook computer to be electrically connected to an electronic device equipped with the display port, and as electronic devices equipped with a lightning interface (thunderbolt) are more and more, the demand for designing the lightning interface on the notebook computer is also more and more.
However, when the notebook computer is configured with only the lightning interface to transmit signals, it is impossible to establish a communication connection with the electronic device configured with the DP interface, which causes inconvenience to users.
Disclosure of Invention
In view of the above, it is desirable to provide an interface switching circuit and an electronic device using the same, so that the electronic device can be switched between a DP interface and a lightning interface, and is convenient to use.
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 comprises 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.
Further, 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.
Further, the switching control chip further includes 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.
Further, the switching control module includes eleventh to eighteenth capacitors and a resistor, the switching control chip includes seventeenth to twenty-fourth data pins, fifth to sixth signal pins, a third detection pin and a third ground pin, the first type communication interface includes first to eighth data pins, first to second signal pins and a detection pin, the seventeenth to twenty-fourth data pins of the switching control chip are electrically connected to the first to eighth data pins of the first type communication interface through the first to eighth capacitors, respectively, the fifth to sixth signal pins of the switching control chip are electrically connected to the first to second signal pins 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.
Further, the switching control module further includes a nineteenth capacitor, the switching control chip further includes a power pin, the power pin is electrically connected to a power supply, and the power pin is further grounded through the nineteenth capacitor.
Further, the power supply is used for outputting a voltage of 5V.
Further, the first type communication interface is a DP interface, and the second type communication interface is a lightning interface.
An electronic device comprises a video data output module and the interface switching circuit.
Furthermore, the video data output module is a main board, and the electronic device is a notebook computer.
According to the interface switching circuit and the electronic device applying the interface switching circuit, the switching control chip is used for detecting the plugging states of the first type communication interface and the second type communication interface and switching the connection between the first type communication interface and the video data output module and the connection between the second type communication interface and the video data output module so as to output video data to the display screen, and therefore the electronic device is convenient for users to use.
Drawings
Fig. 1 is a block diagram of a preferred embodiment of an electronic device according to the present invention.
Fig. 2 is a block diagram of a preferred embodiment of the interface switching circuit of fig. 1.
Fig. 3 is a block diagram of an interface switching circuit coupled to a display screen having a first type of communication interface.
Fig. 4 is a block diagram of the interface switching circuit connected to a display screen having a 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 the main elements
Switching control module 12
Switching control chip 122
First type communication interface 14, 32
Second type communication interface 16, 34
Video data output module 20
Power supply V1
Capacitor C1-C19
Resistor R1
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the interface switching circuit and the electronic device using the same according to the present invention will be described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, a preferred embodiment of the 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, and is configured to receive the video data output by the video data output module 20. The interface switching circuit 10 is further configured to be electrically connected to a display screen 30, so as to transmit the video data to the display screen 30 for displaying.
In this embodiment, the electronic device 100 may be a notebook computer, and in other embodiments, the electronic device 100 may be other electronic equipment. The video data output module 20 may be a main board.
Referring to fig. 2, fig. 2 is a block diagram of a preferred embodiment of the interface switching circuit 10 according to 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 communication interface 14 may be a DP interface, and the second type communication interface 16 may be a thunderbolt interface (thunderbolt).
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 (such as a DP interface), the electronic device 100 can be electrically connected to the first type communication interface 32 through the first type communication interface 14 to establish a communication connection with the display screen 30. At this time, the switching control module 12 detects the plugging state of the first type communication interface 14 and the display screen 30, so that the switching control module 12 sends the video data to the display screen 30 through the first type communication interface 14 for displaying.
Referring to fig. 4, when the display screen 30 has a second type communication interface 34 (e.g. a lightning interface), the electronic device 100 can electrically plug into the second type communication interface 34 through the second type communication interface 16 to establish a communication connection with the display screen 30. At this time, the switching control module 12 detects the plugging state of the second type communication interface 16 and the display screen 30, so that the switching control module 12 sends the video data to the display screen 30 through the second type communication interface 16 for displaying.
Referring to fig. 5, fig. 5 is a circuit diagram of the interface switching circuit 10 according to the preferred embodiment of 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 a power pin PWR. The first type communication interface 14 includes eight data pins D25-D32, two signal pins S7-S8, and a detect pin Z4. The second type communication interface 16 includes eight data pins D33-D40, two signal pins S9-S10, and a detect pin Z5.
The eight data pins D1-D8 of the switching control chip 122 are electrically connected to the eight data pins D33-D40 of the second-type communication interface 16 through capacitors C1-C8, respectively, the two signal pins S1-S2 of the switching control chip 122 are electrically connected to the two signal pins S9-S10 of the second-type communication interface 16 through capacitors C9-C10, respectively, and the detection pin Z1 of the switching control chip 122 is electrically connected to the detection pin Z5 of the second-type communication interface 16. 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 electrically connected to the eight data pins D25-D32 of the first type communication interface 14 through eight capacitors C11-C18, respectively, the two signal pins S5-S6 of the switching control chip 122 are electrically connected to the two signal pins S7-S8 of the first type communication interface 14, respectively, and the detecting pin Z3 of the switching control chip 122 is electrically connected to the detecting pin Z4 of the first 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 a capacitor C19.
In the present embodiment, the power supply V1 is used to output a voltage of 5V.
The operation of the interface switching circuit 10 according to the present invention will be described in detail below.
In 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 connected to the first type communication interface 32 of the display screen 30, at this time, the electronic device 100 is in communication connection with the display screen 30, and the switching control chip 122 receives the video data output by the video data output module 20 through the eight data signal pins D9-D16, and transmits the video data to the eight data pins D25-D32 of the first type communication interface 14 through the eight data pins D17-D24. At this time, the electronic device 100 may transmit the video data to the display screen 30 for display through the first type 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 at this time, the electronic device 100 establishes a communication connection with the display screen 30, and the switching control chip 122 receives the video data output by the video data output module 20 through the eight data signal pins D9-D16, and transmits the video data to the eight data pins D33-D40 of the second-type communication interface 16 through the eight data pins D1-D8. At this time, the electronic device 100 may transmit the video data to the display screen 30 for display through the second type communication interface 16.
The interface switching circuit 10 and the electronic device 100 using the interface switching circuit 10 detect the plugging states of the first type communication interface 14 and the second type communication interface 16 through the switching control chip 122, and switch the connection between the first type communication interface 14 and the second type communication interface 16 and the video data output module 20 to output video data to the display screen 30, which is convenient for a user to use.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited, although the present invention is described in detail with reference to the preferred embodiments.
It will be understood by those skilled in the art that various modifications and equivalent arrangements can be made without departing from the spirit and scope of the present invention.
Moreover, based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426160.5A CN111984569A (en) | 2019-05-21 | 2019-05-21 | Interface switching circuit and electronic device using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426160.5A CN111984569A (en) | 2019-05-21 | 2019-05-21 | Interface switching circuit and electronic device using same |
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| Publication Number | Publication Date |
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| CN111984569A true CN111984569A (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910426160.5A Pending CN111984569A (en) | 2019-05-21 | 2019-05-21 | Interface switching circuit and electronic device using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116610277A (en) * | 2023-07-19 | 2023-08-18 | 深圳市研盛芯控电子技术有限公司 | Intelligent display control system and intelligent display control method |
| CN116741038A (en) * | 2023-08-16 | 2023-09-12 | 广东匠芯创科技有限公司 | Display screen interface switching circuit, control method thereof and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693117A (en) * | 2011-03-25 | 2012-09-26 | 启碁科技股份有限公司 | Interface circuit and electronic device with same |
| US20160335212A1 (en) * | 2015-05-11 | 2016-11-17 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Device for switching between communication modes |
| CN107302677A (en) * | 2016-04-14 | 2017-10-27 | 鸿富锦精密工业(武汉)有限公司 | HDMI and DP compatibility interface circuits |
-
2019
- 2019-05-21 CN CN201910426160.5A patent/CN111984569A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693117A (en) * | 2011-03-25 | 2012-09-26 | 启碁科技股份有限公司 | Interface circuit and electronic device with same |
| US20160335212A1 (en) * | 2015-05-11 | 2016-11-17 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Device for switching between communication modes |
| CN107302677A (en) * | 2016-04-14 | 2017-10-27 | 鸿富锦精密工业(武汉)有限公司 | HDMI and DP compatibility interface circuits |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116610277A (en) * | 2023-07-19 | 2023-08-18 | 深圳市研盛芯控电子技术有限公司 | Intelligent display control system and intelligent display control method |
| CN116741038A (en) * | 2023-08-16 | 2023-09-12 | 广东匠芯创科技有限公司 | Display screen interface switching circuit, control method thereof and electronic equipment |
| CN116741038B (en) * | 2023-08-16 | 2023-11-03 | 广东匠芯创科技有限公司 | Display screen interface switching circuit, control method thereof and electronic equipment |
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