CN203482318U - HDMI (High Definition Multimedia Interface) input interface circuit compatible with MHL (Mobile High-Definition Link) and electronic equipment - Google Patents
HDMI (High Definition Multimedia Interface) input interface circuit compatible with MHL (Mobile High-Definition Link) and electronic equipment Download PDFInfo
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- CN203482318U CN203482318U CN201320591211.8U CN201320591211U CN203482318U CN 203482318 U CN203482318 U CN 203482318U CN 201320591211 U CN201320591211 U CN 201320591211U CN 203482318 U CN203482318 U CN 203482318U
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Abstract
The utility model belongs to the field of electronic equipment interfaces, and provides a HDMI (High Definition Multimedia Interface) input interface circuit compatible with a MHL (Mobile High-Definition Link) and electronic equipment. A first control module outputs a high level signal or a low level signal corresponding to the data line connected with the HDMI input interface; a second control module controls a motherboard power supply whether to provide power for the 18th pin of the HDMI input interface according to the high level signal or the low level signal; and a microprocessor module judges the type of the data line and controls the HDMI input interface to carry out data exchange according to the communicating protocol corresponding to the data line type on the basis of the judgment result. According to the HDMI (High Definition Multimedia Interface) input interface circuit compatible with the MHL (Mobile High-Definition Link), no special MHL connection line is needed, the cost is lower, the design is reasonable and simple, and the circuit is stable and reliable.
Description
Technical field
The utility model belongs to electronic equipment interfaces field, relates in particular to HDMI input interface circuit and the electronic equipment of a kind of compatible MHL.
Background technology
HDMI(High Definition Multimedia Interface, HDMI (High Definition Multimedia Interface)) be a kind of unpressed digital consumption electronic product interface standard, in fields such as television sets, be used widely; MHL(Mobile High-Definition Link, mobile terminal high-definition audio and video standard interface) be a kind of audio-visual standard interface that connects portable consumer electronic device occurring recent years, can use a bars cable (data wire), HDMI input interface by compatible MHL can link together TV and mobile device (for example mobile phone), realize the harmless transmission of high-strength content and control alternately, starting at present extensive use.At present, the HDMI input interface of compatible MHL is when being connected with HDMI data wire, and the 18 pin on HDMI input interface is 5V input pin (be that HDMI information source is inputted 5V to television set, television set is processed accordingly by 5V being detected); When the HDMI of compatible MHL input interface is connected with MHL interface, the 18 pin on HDMI input interface is 5V output pin (being that television set is powered for mobile device provides 5V), hence one can see that, for compatible MHL and HDMI input, extremely important to the processing of the tenth octal of HDMI input interface.Current main methods is to process by special MHL connecting line collocation interface circuit, this kind of method needs special MHL connecting line, and treatment circuit need to be designed in this connecting line inside, and connecting line manufacture craft is very complicated, cause expensively, and reliability is lower.
Utility model content
It is a kind of that the utility model provides, and the HDMI input interface that is intended to solve existing compatible MHL needs special MHL connecting line, causes complex manufacturing technology, price is higher and reliability is low problem.
In order to solve the problems of the technologies described above, the utility model is achieved in that the HDMI input interface circuit of a kind of compatible MHL, is connected with motherboard power supply with HDMI input interface, and described HDMI input interface circuit comprises:
Input is connected with arbitrary grounding pin of described HDMI input interface, power end is connected with described motherboard power supply, when HDMI data wire or MHL data wire are connected with described HDMI input interface, export respectively the first control module of high level signal or low level signal;
Input is connected with the output of described the first control module, power end is connected with described motherboard power supply, output is connected with the 18 pin of described HDMI input interface, according to the high level signal of described the first control module output or low level signal, controls the second control module that described motherboard power supply is connected with break-make between described the 18 pin;
Input is connected with the output of described the first control module, output is connected with described the 18 pin, the type of the data wire that judgement is connected with described HDMI input interface, and control described HDMI input interface according to the microprocessor module of communication protocol swap data corresponding to the type with described data wire according to judged result.
Further, described the first control module comprises:
The first resistance, the second resistance, a NPN type triode;
The base stage of a described NPN type triode is the input of described the first control module, the first end of described the first resistance is connected with the base stage of a described NPN type triode, the collector electrode of a described NPN type triode is connected with the first end of described the second resistance, the grounded emitter of a described NPN type triode, the second end of described the first resistance and the second end of described the second resistance are the power end of described the first control module, the output of very described first control module of current collection of a described NPN type triode.
Further, described the second control module comprises:
The 3rd resistance, the 2nd NPN type triode, a NMOS pipe;
The base stage of described the 2nd NPN type triode is the input of described the second control module, the grounded emitter of described the 2nd NPN type triode, described the 2nd collector electrode of NPN type triode and the first end of described the 3rd resistance are connected with the grid of a described NMOS pipe, the second end of described the 3rd resistance and the drain electrode of a described NMOS pipe are the power end of described the second control module, and the source electrode of a described NMOS pipe is the output of described the second control module.
Further, described microprocessor module comprises:
The 4th resistance, the 2nd NMOS pipe, microprocessor;
The first end of described the 4th resistance R 4 is the input of described microprocessor module, the second end of described the 4th resistance is connected with the grid of described the 2nd NMOS pipe, the drain electrode of described the 2nd NMOS pipe is the output of described microprocessor module, and described the 2nd source electrode of NMOS pipe and the input/output terminal of described microprocessor are connected.
The utility model also provides a kind of electronic equipment, and described electronic equipment comprises HDMI input interface circuit as above.
In the utility model, corresponding high level signal or the low level signal of data wire connecting with HDMI input interface by the first control module output, the second control module is controlled motherboard power supply whether to the 18 pin powered of HDMI input interface according to this high level signal or low level signal, then by microprocessor module, judge the type of this data wire, and according to judged result, control described HDMI input interface and carry out exchanges data according to communication protocol corresponding to the type with this data wire, the HDMI input interface of the compatible MHL that the utility model provides does not need special MHL connecting line, cost is lower, simplicity of design is reasonable and reliable and stable.
Accompanying drawing explanation
Fig. 1 is the modular structure figure of the HDMI input interface circuit of the compatible MHL that provides of the utility model embodiment;
Fig. 2 is the circuit structure diagram of the HDMI input interface circuit of the compatible MHL that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Below in conjunction with specific embodiment, specific implementation of the present utility model is described in detail:
Fig. 1 shows the modular structure of the HDMI input interface circuit of the compatible MHL that the utility model embodiment provides, for convenience of explanation, only lists the part relevant to the utility model embodiment.
As shown in Figure 1, the HDMI input interface circuit of the compatible MHL that the utility model embodiment provides is connected with motherboard power supply 100 with HDMI input interface J1, and HDMI input interface circuit comprises:
Input is connected with arbitrary grounding pin P1 of HDMI input interface J1, power end is connected with motherboard power supply 100, when HDMI data wire or MHL data wire are connected with HDMI input interface J1, export respectively the first control module 201 of high level signal or low level signal;
Input is connected with the output of the first control module 201, power end is connected with motherboard power supply 100, output is connected with the 18 pin P18 of HDMI input interface J1, according to the high level signal of the first control module 201 output or low level signal, controls the second control module 202 that motherboard power supply 100 is connected with break-make between the 18 pin P18;
Input is connected with the output of the first control module 201, output is connected with the 18 pin P18, the type of the data wire that judgement is connected with HDMI input interface J1, and control HDMI input interface J1 according to the microprocessor module 203 of communication protocol swap data corresponding to the type with this data wire according to judged result.
In the utility model embodiment, the HDMI input interface of compatible MHL is to be all arranged in electronic product, as TV, computer, projecting apparatus etc., in these electronic products, all be provided with motherboard power supply for powering to each parts, the HDMI input interface circuit that the utility model embodiment provides is also to provide operating voltage by these motherboard power supplies, wherein, microprocessor module 203 is not only connected with the 18 pin P18 of HDMI input interface J1, still there is annexation with other pins of HDMI input interface J1, for carrying out the communication protocol corresponding with the type of this data wire according to the Type Control HDMI input interface of the data wire connecting with HDMI input interface, for example, when HDMI data wire is connected with HDMI input interface J1, microprocessor module 203 is controlled HDMI input interface J1 and is carried out exchanges data according to the communication protocol corresponding with HDMI data, when MHL data wire is connected with HDMI input interface J1, microprocessor module 203 is controlled HDMI input interface J1 and is carried out exchanges data according to the communication protocol corresponding with MHL data.
Further, in the utility model embodiment, the input of the first control module 201 with being connected of pin of HDMI input interface J1 be not limited to grounding pin, can also be other idle pins.
As shown in Figure 2, as the utility model one embodiment, the first control module 201 comprises:
The first resistance R 1, the second resistance R 2, a NPN type triode Q1;
The base stage of the one NPN type triode Q1 is the input of the first control module 201, the first end of the first resistance R 1 is connected with the base stage of a NPN type triode Q1, the collector electrode of the one NPN type triode Q1 is connected with the first end of the second resistance R 2, the grounded emitter of the one NPN type triode Q1, the second end of the second end of the first resistance R 1 and the second resistance R 2 is the power end of the first control module 201, and the current collection of a NPN type triode Q1 is the output of the first control module 201 very.
As the utility model one embodiment, the second control module 202 comprises:
The 3rd resistance R 3, the 2nd NPN type triode Q2, a NMOS pipe Q3;
The base stage of the 2nd NPN type triode Q2 is the input of the second control module 202, the grounded emitter of the 2nd NPN type triode Q2, the 2nd collector electrode of NPN type triode Q2 and the first end of the 3rd resistance R 3 are connected with the grid of a NMOS pipe Q3, the drain electrode of the second end of the 3rd resistance R 3 and NMOS pipe Q3 is the power end of the second control module 202, and the source electrode of a NMOS pipe Q3 is the output of the second control module 202.
As the utility model one embodiment, microprocessor module 203 comprises:
The 4th resistance R 4, the 2nd NMOS pipe Q4, Micro-processor MCV;
The first end of the 4th resistance R 4 is the input of microprocessor module 203, the second end of the 4th resistance R 4 is connected with the grid of the 2nd NMOS pipe Q4, the drain electrode of the 2nd NMOS pipe Q4 is the output of microprocessor module 203, and the 2nd NMOS pipe source electrode of Q4 and the input/output terminal I/O1 of Micro-processor MCV are connected.
The operation principle of the HDMI input interface circuit of the compatible MHL below the utility model embodiment being provided describes:
1), when HDMI input interface J1 inserts HDMI signal source (data wire), the 18 pin of HDMI input interface J1 is the 5V voltage signal of HDMI signal source input; The grounding pin of HDMI input interface J1 is all connected to ground, and P1 leg signal is low level, and P1 leg signal is NPN triode Q1 cut-off of low level, the first control module 201 output high level.The first control module 201 output high level are the 2nd NPN type triode Q2 saturation conduction, the current collection of the 2nd NPN type triode Q2 is low level very, the one NMOS pipe Q3 cut-off, the 18 pin P18 that the voltage VCC that motherboard power supply 100 provides can not be HDMI input interface J1 by a NMOS pipe Q3 provides operating voltage, the first control module 201 output high level, the 2nd NMOS pipe Q4 conducting, the 18 pin P18 of HDMI input interface J1 and an input/output terminal I/O1 of Micro-processor MCV link together, it is the I/O1 mouth that the 5V voltage signal of HDMI signal source input inputs to Micro-processor MCV, the voltage signal that Micro-processor MCV recognizes I/O1 mouth is 5V, is judged as the access of HDMI signal source, and controls HDMI input interface and carry out exchanges data according to the communication protocol corresponding with HDMI data type.
2) when HDMI input interface J1 inserts MHL mobile terminal (data wire), P1 pin will be by vacant, simultaneously because P1 pin is pulled to motherboard power supply 100 by the first resistance R 1, P1 pin can be regarded high level as, make a NPN type triode Q1 saturation conduction, the first control module 201 output low level signals, the first control module 201 output low level signals are the 2nd NPN type triode Q2 cut-off, the collector electrode of the 2nd NPN type triode Q2, NMOS pipe Q3 conducting, the voltage VCC of motherboard power supply 100 outputs provides operating voltage by a NMOS pipe Q3 to the 18 pin P18, the operating voltage of the 18 pin P18 provides to mobile terminal for TV, the first control module 201 output low level signals, the 2nd NMOS pipe Q4 cut-off, the input/output terminal I/O1 of the 18 pin P18 and MCU disconnects, do not have 5V voltage signal to input to the I/O1 mouth of MCU, be judged as the access of MHL signal source, and control HDMI input interface and carry out exchanges data according to the communication protocol corresponding with MHL data type.
The utility model embodiment also provides a kind of electronic equipment, and this electronic equipment comprises HDMI input interface circuit as above.
In the utility model embodiment, electronic equipment comprises that television set, computer, panel computer etc. are provided with the equipment of HDMI input interface.
In the utility model embodiment, corresponding high level signal or the low level signal of data wire connecting with HDMI input interface by the first control module output, the second control module is controlled motherboard power supply whether to the 18 pin powered of HDMI input interface according to this high level signal or low level signal, then by microprocessor module, judge the type of this data wire, and according to judged result, control described HDMI input interface and carry out exchanges data according to the communication protocol corresponding with this data wire type, the HDMI input interface of the compatible MHL that the utility model provides does not need special MHL connecting line, cost is lower, simplicity of design is reasonable and reliable and stable.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. a HDMI input interface circuit of compatible MHL, is connected with motherboard power supply with HDMI input interface, it is characterized in that, described HDMI input interface circuit comprises:
Input is connected with arbitrary grounding pin of described HDMI input interface, power end is connected with described motherboard power supply, when HDMI data wire or MHL data wire are connected with described HDMI input interface, export respectively the first control module of high level signal or low level signal;
Input is connected with the output of described the first control module, power end is connected with described motherboard power supply, output is connected with the 18 pin of described HDMI input interface, according to the high level signal of described the first control module output or low level signal, controls the second control module that described motherboard power supply is connected with break-make between described the 18 pin;
Input is connected with the output of described the first control module, output is connected with described the 18 pin, the type of the data wire that judgement is connected with described HDMI input interface, and control described HDMI input interface according to the microprocessor module of communication protocol swap data corresponding to the type with described data wire according to judged result.
2. HDMI input interface circuit as claimed in claim 1, is characterized in that, described the first control module comprises:
The first resistance, the second resistance, a NPN type triode;
The base stage of a described NPN type triode is the input of described the first control module, the first end of described the first resistance is connected with the base stage of a described NPN type triode, the collector electrode of a described NPN type triode is connected with the first end of described the second resistance, the grounded emitter of a described NPN type triode, the second end of described the first resistance and the second end of described the second resistance are the power end of described the first control module, the output of very described first control module of current collection of a described NPN type triode.
3. HDMI input interface circuit as claimed in claim 1, is characterized in that, described the second control module comprises:
The 3rd resistance, the 2nd NPN type triode, a NMOS pipe;
The base stage of described the 2nd NPN type triode is the input of described the second control module, the grounded emitter of described the 2nd NPN type triode, described the 2nd collector electrode of NPN type triode and the first end of described the 3rd resistance are connected with the grid of a described NMOS pipe, the second end of described the 3rd resistance and the drain electrode of a described NMOS pipe are the power end of described the second control module, and the source electrode of a described NMOS pipe is the output of described the second control module.
4. HDMI input interface circuit as claimed in claim 1, is characterized in that, described microprocessor module comprises:
The 4th resistance, the 2nd NMOS pipe, microprocessor;
The first end of described the 4th resistance is the input of described microprocessor module, the second end of described the 4th resistance is connected with the grid of described the 2nd NMOS pipe, the drain electrode of described the 2nd NMOS pipe is the output of described microprocessor module, and described the 2nd source electrode of NMOS pipe and the input/output terminal of described Micro-processor MCV are connected.
5. an electronic equipment, is characterized in that, described electronic equipment comprises the HDMI input interface circuit as described in as arbitrary in claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591211.8U CN203482318U (en) | 2013-09-24 | 2013-09-24 | HDMI (High Definition Multimedia Interface) input interface circuit compatible with MHL (Mobile High-Definition Link) and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591211.8U CN203482318U (en) | 2013-09-24 | 2013-09-24 | HDMI (High Definition Multimedia Interface) input interface circuit compatible with MHL (Mobile High-Definition Link) and electronic equipment |
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| CN203482318U true CN203482318U (en) | 2014-03-12 |
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| CN201320591211.8U Expired - Lifetime CN203482318U (en) | 2013-09-24 | 2013-09-24 | HDMI (High Definition Multimedia Interface) input interface circuit compatible with MHL (Mobile High-Definition Link) and electronic equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301651A (en) * | 2014-09-26 | 2015-01-21 | 四川长虹电器股份有限公司 | Connector, television compatible with MHL, television system compatible with MHL and method |
| CN104994320A (en) * | 2015-06-12 | 2015-10-21 | 青岛海信信芯科技有限公司 | HDMI service equipment |
| CN114253191A (en) * | 2021-12-17 | 2022-03-29 | 深圳市莫尼迪科技有限责任公司 | HDMI (high-definition multimedia interface) reverse power supply circuit and power supply method |
-
2013
- 2013-09-24 CN CN201320591211.8U patent/CN203482318U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301651A (en) * | 2014-09-26 | 2015-01-21 | 四川长虹电器股份有限公司 | Connector, television compatible with MHL, television system compatible with MHL and method |
| CN104301651B (en) * | 2014-09-26 | 2018-03-23 | 四川长虹电器股份有限公司 | Compatible MHL television system and method |
| CN104994320A (en) * | 2015-06-12 | 2015-10-21 | 青岛海信信芯科技有限公司 | HDMI service equipment |
| CN104994320B (en) * | 2015-06-12 | 2018-05-15 | 青岛海信电器股份有限公司 | A kind of HDMI service equipments |
| CN114253191A (en) * | 2021-12-17 | 2022-03-29 | 深圳市莫尼迪科技有限责任公司 | HDMI (high-definition multimedia interface) reverse power supply circuit and power supply method |
| CN114253191B (en) * | 2021-12-17 | 2024-03-19 | 深圳市莫尼迪科技有限责任公司 | HDMI interface reverse power supply circuit and power supply method |
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Effective date of registration: 20210709 Address after: Room 821, No. 333, jiufo Jianshe Road, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Skyworth Group Intelligent Technology Co.,Ltd. Address before: 510530 No.99, Kaida Road, Science City, Guangzhou Development Zone, Guangdong Province Patentee before: GUANGZHOU SKYWORTH FLAT DISPLAY TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20140312 |
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