CN102761723A - MHL (Mobile High-Definition Link) detection device and charge power supply management method of digital multimedia receiving device - Google Patents
MHL (Mobile High-Definition Link) detection device and charge power supply management method of digital multimedia receiving device Download PDFInfo
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- CN102761723A CN102761723A CN2012102626453A CN201210262645A CN102761723A CN 102761723 A CN102761723 A CN 102761723A CN 2012102626453 A CN2012102626453 A CN 2012102626453A CN 201210262645 A CN201210262645 A CN 201210262645A CN 102761723 A CN102761723 A CN 102761723A
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Abstract
The invention discloses an MHL (Mobile High-Definition Link) detection device and a charge power supply management method of a digital multimedia receiving device. The technical scheme is as follows: the digital multimedia receiving device comprises an MHL device detection circuit, an MHL charge power supply management circuit, a processor, a signal processor and an MHL connection wire joint. The MHL detection device is characterized in that and an MHL cable and an HDMI (High Definition Multimedia Interface) of an MHL device accessing the receiving device can be conveniently detected by the MHL device detection circuit, and the MHL charge power supply management circuit is controlled through the processor for charging the MHL device. The invention has the advantages of expanding an MHL technology and realizing hardware connection detection of the MHL device in the HDMI and charge power supply management of the MHL device.
Description
Technical field
The present invention relates to a kind of digital multimedia technology, particularly digital multimedia receiving apparatus and MHL (the Mobile HD Link) joint detection of equipment and the charge power supply of MHL equipment management.
Background technology
Develop rapidly along with the current digit technology; Most of digital multimedia receiving apparatus; All have HDMI (High Definition Multimedia) interface; The HDMI interface is a kind of digital signal interface relatively more commonly used in present audio frequency and video transmission and the receiving equipment, because it can support the display format in EIA/CEA-861B and two standards of VESA (Video Electronics Standards Association), therefore uses very extensive.In addition; Development along with smart mobile phone (Smart Mobile) technology; It is more simple and convenient that the processing of digital stream medium becomes; For adapting to interconnecting of smart mobile phone and digital multimedia receiving apparatus, a kind of novel interconnection technique Mobile HD Link (that is: MHL) has appearred on smart mobile phone.Through the MHL technology, on the one hand, can receive the high definition stream media content of the MHL interface output of smart mobile phone through the HDMI interface of digital multimedia display device; On the other hand, the digital multimedia display device can charge to smart mobile phone through this connection.
According to the MHL standard; The connection cable that MHL changes HDMI adopts 5 lines to realize interconnecting of HDMI interface and MHL interface; These 5 connect holding wires and are respectively: MHL_D+, MHL_D-, CBUS ,+5V, GND, wherein do not relate to the charge power supply management between device hardware joint detection and two multimedia equipments.
Summary of the invention
Technical problem to be solved by this invention just provides method and the method for managing power supply when MHL equipment charges of realizing the hardware joint detection between a kind of MHL interface of HDMI interface and smart mobile phone of digital multimedia receiving apparatus.
The present invention solves its technical problem, and the technical scheme of employing is that digital multimedia receiving apparatus comprises MHL Equipment Inspection circuit, MHL charge power supply management circuit, processor, signal processing and MHL connecting line joint.
The HDMI interface of digital multimedia receiving apparatus of the present invention detects MHL equipment and charge power supply management method, it is characterized in that, may further comprise the steps:
The a.HDMI interface is connected with the hardware of MHL equipment, in the HDMI of connecting line joint interface end, its 2nd pin is connected at the cable internal short-circuit with the 15th pin;
The b.MHL testing circuit detects MHL equipment and normally connects;
C. processor is according to the detection signal of testing circuit, and control MHL charge power supply management circuit is the MHL equipment charge.
The invention has the beneficial effects as follows, expanded the MHL technology, realized the hardware joint detection of MHL equipment in the HDMI interface and the charge power supply management of MHL equipment.
Description of drawings
Fig. 1 is the HDMI interface and the MHL interface pie graph of existing digital multimedia TV;
Fig. 2 is a system of the present invention pie graph;
Fig. 3 is system flow chart of the present invention and control timing figure.
Embodiment
Describe below in conjunction with the accompanying drawing specific embodiments of the invention, so that those skilled in the art understands the present invention better.What need point out especially is that in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these were described in here and will be left in the basket.
Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
The invention provides the hardware joint detection of a kind of digital multimedia receiving apparatus HDMI interface and smart mobile phone MHL interface, and digital multimedia receiving apparatus is through the method for managing power supply of connecting line when the MHL equipment charge.
Concrete pie graph such as Fig. 2 of technical scheme of the present invention, its system flow chart and control timing such as Fig. 3, prior art contrast pie graph such as Fig. 1.
Like Fig. 2, there are detection circuitry, charge power supply management circuit system in system in constituting.Wherein detection circuitry comprises D1, R2, processor, MHL connecting line joint; Charge power supply management circuit system comprises Q1, R1, processor, MHL connecting line joint.During the digital multimedia receiving apparatus operate as normal ,+5VD is effective, at this moment; Inserting the HDMI interface that shows receiving equipment like the MHL connecting line, is high level through testing circuit D1 output MHL_ID_OUTPUT then, because connecting line joint inside is with MHL_ID_OUTPUT and MHL_ID_INPUT short circuit; So it is high level that processor receives the MHL_ID_INPUT signal; Processor is again according to system's setting, opens charging circuit Q1 through the Charge_SW signal controlling, make+5VD is to+5V_MHL charging.
The flow process of system works and control timing figure are as shown in Figure 3.
Contrast MHL interface and the HDMI interface that can find out prior art by Fig. 1 and Fig. 2 and can't realize hardware joint detection and charge power supply management, detection system of the present invention, charge power supply management system can satisfy related needs.
Technical scheme according to the invention is equally applicable to panel TV, projection TV, CRT TV, LCD LCD TV, the forwarding of HDMI relaying etc.
Although above the illustrative embodiment of the present invention is described; So that the technical staff in present technique field understands the present invention, but should be clear, the invention is not restricted to the scope of embodiment; To those skilled in the art; As long as various variations appended claim limit and the spirit and scope of the present invention confirmed in, these variations are conspicuous, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (4)
1. a digital multimedia receiving apparatus detects MHL equipment; Comprise processor, MHL Equipment Inspection circuit, MHL equipment charge electric power management circuit, signal processing unit, HDMI interface connection cable; It is characterized in that; The processor of digital multimedia receiving apparatus, MHL Equipment Inspection circuit, MHL equipment charge electric power management circuit connect, and signal processing unit is connected with HDMI interface connecting line, and signal processing unit is connected with processor.
2. digital multimedia receiving apparatus according to claim 1 detects MHL equipment; It is characterized in that; It is characterized in that said digital multimedia shows that receiving equipment comprises panel TV, projection TV, CRT TV, LCD LCD TV etc., the forwarding of HDMI relaying etc.
3. the method for the charge power supply management of a digital multimedia receiving apparatus detection MHL equipment is characterized in that, may further comprise the steps:
A.HDMI interface and MHL equipment carry out hardware and connect through the cable at inner two line short circuits;
The b.MHL testing circuit detects MHL equipment and normally connects;
C. detection signal is transferred to processor and confirms that two equipment connect.
4. digital multimedia receiving apparatus according to claim 3 detects the method for the charge power supply management of MHL equipment, it is characterized in that, may further comprise the steps:
A.HDMI interface and MHL equipment carry out hardware and connect through the cable at inner two line short circuits;
B. processor is according to the detection signal of testing circuit, and control MHL charge power supply management circuit is the MHL equipment charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102626453A CN102761723A (en) | 2012-07-27 | 2012-07-27 | MHL (Mobile High-Definition Link) detection device and charge power supply management method of digital multimedia receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102626453A CN102761723A (en) | 2012-07-27 | 2012-07-27 | MHL (Mobile High-Definition Link) detection device and charge power supply management method of digital multimedia receiving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102761723A true CN102761723A (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102626453A Pending CN102761723A (en) | 2012-07-27 | 2012-07-27 | MHL (Mobile High-Definition Link) detection device and charge power supply management method of digital multimedia receiving device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103491412A (en) * | 2013-09-27 | 2014-01-01 | 广州视源电子科技股份有限公司 | MHL equipment identification circuit with standby charging function |
| CN103944218A (en) * | 2014-04-02 | 2014-07-23 | 苏州佳世达电通有限公司 | Charging protection method and display device |
-
2012
- 2012-07-27 CN CN2012102626453A patent/CN102761723A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103491412A (en) * | 2013-09-27 | 2014-01-01 | 广州视源电子科技股份有限公司 | MHL equipment identification circuit with standby charging function |
| CN103491412B (en) * | 2013-09-27 | 2016-08-17 | 广州视源电子科技股份有限公司 | MHL equipment identification circuit with standby charging function |
| CN103944218A (en) * | 2014-04-02 | 2014-07-23 | 苏州佳世达电通有限公司 | Charging protection method and display device |
| CN103944218B (en) * | 2014-04-02 | 2016-08-17 | 苏州佳世达电通有限公司 | Charge protection method and display device |
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Application publication date: 20121031 |