CN203368616U - Automatic power supply system based on HDMI interfaces - Google Patents
Automatic power supply system based on HDMI interfaces Download PDFInfo
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- CN203368616U CN203368616U CN 201320383999 CN201320383999U CN203368616U CN 203368616 U CN203368616 U CN 203368616U CN 201320383999 CN201320383999 CN 201320383999 CN 201320383999 U CN201320383999 U CN 201320383999U CN 203368616 U CN203368616 U CN 203368616U
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Abstract
The utility model discloses an automatic power supply system based on HDMI interfaces. The automatic power supply system includes an HDMID Dongle device and a receiving device. The HDMI Dongle device includes a first HDMI interface. The receiving device includes a second HDMI interface and a power supply device. The power supply device includes a power input terminal used for inputting working voltage, a detection circuit used for detecting the second HDMI interface and outputting power supply control signals and a power supply switch used for controlling whether to supply power for the HDMI Dongle device or not according to the power supply control signals. According to the utility model, utilizing the receiving device connected with the HDMI Dongle device for supplying power for the HDMI Dongle device is realized and no external adapter is needed for power supply, so that cost is reduced. At the same time, an MHL device can also gain power from the receiving device in a condition that the receiving device is compatible to the MHL technology.
Description
Technical field
The utility model relates to the HDMI technical field, relates in particular to a kind of automatic power system based on the HDMI interface.
Background technology
Along with HDMI(High-Definition Multimedia Interface, high-definition audio and video interface) the generally application of technology, various small-sized treatment facility HDMI Dongle or other small-sized HDMI interface equipments containing the HDMI interface arise at the historic moment.At present, the IC on HDMI Dongle all needs external adapter to be powered, and could work, and external adapter is powered and needed cable to connect, and uses inconvenient.
And, current some receiving equipment HDMI SINK containing the HDMI interface compatible MHL(Mobile High-Definition Link in the HDMI interface, the mobile high definition audio/video interface) technology, be that the microcontroller of receiving equipment is detected MHL equipment by the data mask end (the second pin) of HDMI interface, the general input/output port GPIO of MCU provides the electric power system that significant level is controlled MHL equipment simultaneously.But now, this supply power mode also needs to take a pin in the HDMI interface, needs MCU to do corresponding judgement simultaneously, and whether provide control signal control to the power supply of MHL equipment.In this case, 19 pins in the HDMI standard definition are all occupied, do not have unnecessary pin to be used for detecting HDMI Dongle again.
The utility model content
Main purpose of the present utility model is to propose a kind of automatic power system based on the HDMI interface, is intended to realize that HDMI Dongle equipment obtains power supply from connected receiving equipment, does not need supplied with power through external adapter, reduces costs.
In order to achieve the above object, the utility model proposes a kind of automatic power system based on the HDMI interface, this automatic power system comprises HDMI Dongle equipment and receiving equipment, described HDMI Dongle equipment comprises a HDMI interface, described receiving equipment comprises the 2nd HDMI interface, described receiving equipment also comprises electric supply installation, described electric supply installation comprises the power input for input service voltage, for detection of described the 2nd HDMI interface and export the testing circuit of power supplying control signal and for whether control the switching circuit of power supply to the power supply of HDMI Dongle equipment according to described power supplying control signal, wherein,
A described HDMI interface is connected by the HDMI line with described the 2nd HDMI interface; The consumer electronics control end of described the 2nd HDMI interface detects input with first of described testing circuit and is connected; The output of described testing circuit is connected with the Enable Pin of described switching circuit of power supply, and the input of described switching circuit of power supply is connected with described power input, and the output of described switching circuit of power supply is connected with the feeder ear of described the 2nd HDMI interface.
Preferably, the feeder ear of a described HDMI interface is connected with the clock end with the data terminal of a described HDMI interface respectively, the consumer electronics control end ground connection of a described HDMI interface.
Preferably, described HDMI Dongle equipment also comprises the first resistance, the second resistance and the 3rd resistance, and an end of described the first resistance is connected with the consumer electronics control end of a described HDMI interface, other end ground connection; One end of described the second resistance is connected with the feeder ear of a HDMI interface, and the other end is connected with the data terminal of a HDMI interface; One end of described the 3rd resistance and the feeder ear of a HDMI interface, the other end is connected with the clock end of a HDMI interface.
Preferably, described testing circuit comprises triode, the first electric capacity, the 4th resistance, the 5th resistance and the 6th resistance; Wherein,
The base stage of described triode detects input as first of described testing circuit, with the consumer electronics control end of described the 2nd HDMI interface, be connected, and be connected with described power input via described the 6th resistance, the collector electrode of described triode is as the output of described testing circuit, with the Enable Pin of described switching circuit of power supply, be connected, and be connected the grounded emitter of described triode with described power input via described the 5th resistance; One end of described the first electric capacity is connected with the collector electrode of described triode, other end ground connection, described the 4th resistance and described the first Capacitance parallel connection.
Preferably, described automatic power system also comprises MHL equipment, and described MHL equipment comprises the MHL interface, and described receiving equipment also comprises microcontroller;
The first general input/output port of described microcontroller is connected with the data mask end of described the 2nd HDMI interface, and the second general input/output port of described microcontroller is connected to second of described testing circuit and detects input;
The feeder ear of described MHL interface is connected with the feeder ear of described the 2nd HDMI interface, and the command transfer end of described MHL interface is connected with the data mask end of described the 2nd HDMI interface.
Preferably, described testing circuit comprises triode, the first double diode, the first electric capacity, the 4th resistance, the 5th resistance and the 6th resistance; Wherein,
The base stage of described triode is connected with the consumer electronics control end of described the 2nd HDMI interface, and be connected with described power input via described the 6th resistance, the collector electrode of described triode is connected with the first anode of described the first double diode, and be connected the grounded emitter of described triode with described power input via described the 5th resistance; The second plate of described the first double diode detects input as second of described testing circuit, with the second general input/output port of described microcontroller, be connected, the common cathode of described the first double diode, as the output of described testing circuit, is connected with the Enable Pin of described switching circuit of power supply; One end of described the first electric capacity is connected with the collector electrode of described triode, other end ground connection, described the 4th resistance and described the first Capacitance parallel connection.
Preferably, described testing circuit also comprises the 7th resistance and the 8th resistance; One end of described the 7th resistance is connected with the consumer electronics control end of described the 2nd HDMI interface, and the other end is connected with the base stage of described triode; One end of described the 8th resistance is connected with the base stage of described triode, other end ground connection.
Preferably, described switching circuit of power supply comprises mains switch chip and the second double diode, and described mains switch chip comprises input pin, enables pin, output pin and grounding leg; Wherein,
Described input pin is as the input of described switching circuit of power supply, with described power input, be connected, the described Enable Pin of pin as described switching circuit of power supply that enable, with the collector electrode of described triode, be connected, described output pin is as the output of described switching circuit of power supply, be connected described grounding leg ground connection with the feeder ear of described the 2nd HDMI interface; The first anode of described the second double diode is connected with described power input, and the second plate of described the second double diode is connected with described output pin, and the common cathode of described the second double diode is connected with the clock end with the data terminal of described the 2nd HDMI interface respectively.
Preferably, described switching circuit of power supply comprises mains switch chip and the second double diode, and described mains switch chip comprises input pin, enables pin, output pin and grounding leg; Wherein,
Described input pin is as the input of described switching circuit of power supply, with described power input, be connected, the described Enable Pin of pin as described switching circuit of power supply that enable, with the common cathode of described the first double diode, be connected, described output pin is as the output of described switching circuit of power supply, be connected described grounding leg ground connection with the feeder ear of described the 2nd HDMI interface; The first anode of described the second double diode is connected with described power input, and the second plate of described the second double diode is connected with described output pin, and the common cathode of described the second double diode is connected with the clock end with the data terminal of described the 2nd HDMI interface respectively.
Preferably, described switching circuit of power supply also comprises the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 9th resistance and the tenth resistance; One end of described the second electric capacity is connected with described power input, other end ground connection; One end of described the 3rd electric capacity is connected with the pin that enables of described mains switch chip, other end ground connection; The positive pole of described the 4th electric capacity is connected with the output pin of described mains switch chip, minus earth; One end of described the 5th electric capacity is connected with the output pin of described mains switch chip, other end ground connection; One end of described the 9th resistance is connected with the common cathode of described the second double diode, and the other end is connected with the data terminal of the 2nd HDMI interface; One end of described the tenth resistance is connected with the common cathode of described the second double diode, and the other end is connected with the clock end of the 2nd HDMI interface.
The automatic power system based on the HDMI interface the utility model proposes, detect the consumer electronics control end of the 2nd HDMI interface by testing circuit, testing circuit is according to the detection signal detected, detect HDMI Dongle equipment and whether connect receiving equipment, and export corresponding power supplying control signal to switching circuit of power supply, operation is opened or turn-offed to switching circuit of power supply according to this power supplying control signal, with when the HDMI Dongle equipment connection receiving equipment, control the operating voltage of power input input and power to HDMI Dongle equipment.With respect to prior art, the automatic power system of the utility model based on the HDMI interface, consumer electronics control end by the 2nd HDMI interface on multiplexing receiving equipment, complete the detecting to HDMI Dongle equipment, realizes that HDMI Dongle equipment obtains power supply from connected receiving equipment.The power supply that is HDMI Dongle equipment in the utility model does not need supplied with power through external adapter, has reduced stube cable, makes the use of HDMI Dongle equipment more convenient, has reduced cost.Simultaneously, the utility model meets under the compatible MHL technical situation of receiving equipment, and during MHL equipment connection receiving equipment, MHL equipment also can be obtained power supply from receiving equipment.
The accompanying drawing explanation
The theory diagram that Fig. 1 is automatic power system first embodiment of the utility model based on the HDMI interface;
The theory diagram that Fig. 2 is automatic power system second embodiment of the utility model based on the HDMI interface;
The electrical block diagram that Fig. 3 is automatic power system first embodiment of the utility model based on the HDMI interface;
The electrical block diagram that Fig. 4 is automatic power system second embodiment of the utility model based on the HDMI interface.
The realization of the purpose of this utility model, functional characteristics and advantage, in connection with embodiment, and be described further with reference to accompanying drawing.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with Figure of description and specific embodiment.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.
With reference to Fig. 1, the theory diagram that Fig. 1 is automatic power system first embodiment of the utility model based on the HDMI interface.
In the utility model preferred embodiment, automatic power system based on the HDMI interface comprises HDMI Dongle equipment 10 and receiving equipment 20, HDMI Dongle equipment 10 comprises a HDMI interface 11, receiving equipment 20 comprises the 2nd HDMI interface 21 and electric supply installation 22, electric supply installation 22 comprises power input POWER, testing circuit 221 and switching circuit of power supply 222, power input POWER is for input service voltage, power supply while giving receiving equipment 20 work, testing circuit 221 is for detection of the 2nd HDMI interface 21 and export power supplying control signal, whether switching circuit of power supply 222 is controlled and is powered to HDMI Dongle equipment 10 for the power supplying control signal according to testing circuit 221 outputs.
Wherein, a HDMI interface 11 is connected by the HDMI line with the 2nd HDMI interface 21, and a HDMI interface 11 pin number contained with the 2nd HDMI interface 21 is identical.When needs connect receiving equipment 20 by HDMI Dongle equipment 10, by the HDMI line with a HDMI interface 11, the 2nd HDMI interface 21 adaptations, be connected a HDMI interface 11 and the 2nd HDMI interface 21; The consumer electronics control end of the 2nd HDMI interface 21 detects input with first of testing circuit 221 and is connected; The output of testing circuit 221 is connected with the Enable Pin of switching circuit of power supply 222, and the input of switching circuit of power supply 222 is connected with power input POWER, and the output of switching circuit of power supply 222 is connected with the feeder ear of the 2nd HDMI interface 21.
In the present embodiment, automatic power system based on the HDMI interface detects the consumer electronics control end of the 2nd HDMI interface 21 by testing circuit 221, testing circuit 221 is according to the detection signal detected, detect HDMI Dongle equipment 10 and whether connect receiving equipment 20, and export corresponding power supplying control signal to switching circuit of power supply 222, operation is opened or turn-offed to switching circuit of power supply 222 according to this power supplying control signal, with when HDMI Dongle equipment 10 connects receiving equipment 20, switching circuit of power supply 222 is open-minded, control the operating voltage of power input POWER input to 10 power supplies of HDMI Dongle equipment.
With respect to prior art, automatic power system based on the HDMI interface of the present utility model, consumer electronics control end by the 2nd HDMI interface 21 on multiplexing receiving equipment 20, complete the detecting to HDMI Dongle equipment 10, realize that HDMI Dongle equipment 10 obtains power supply from connected receiving equipment 20.The power supply that is HDMI Dongle equipment 10 in the utility model does not need supplied with power through external adapter, has reduced stube cable, makes the use of HDMI Dongle equipment 10 more convenient, has reduced cost.
With reference to Fig. 2, the theory diagram that Fig. 2 is automatic power system second embodiment of the utility model based on the HDMI interface.
Based on the first embodiment, propose automatic power system second embodiment of the utility model based on the HDMI interface, in the present embodiment, the automatic power system based on the HDMI interface also comprises MHL equipment 30, MHL equipment 30 comprises MHL interface 31, and receiving equipment 20 also comprises microcontroller 23; The first general input/output port of microcontroller 23 is connected with the data mask end of the 2nd HDMI interface 21, and the second general input/output port of microcontroller 23 is connected to testing circuit 221; The feeder ear of MHL interface 31 is connected with the feeder ear of the 2nd HDMI interface 21, and the command transfer end of MHL interface 31 is connected with the data mask end of the 2nd HDMI interface 21.
When the present embodiment detects MHL equipment 30 connection receiving equipment 20 by microcontroller 23, microcontroller 23 output MHL detection signals are to testing circuit 221, testing circuit 221 is according to this MHL detection signal, export corresponding power supplying control signal, open-minded to control switching circuit of power supply 222, while making receiving equipment 20 connect MHL equipment 30, MHL equipment 30 also can power taking from receiving equipment 20.Meet the 2nd HDMI interface 21 at receiving equipment 20 under compatible MHL technical situation, electric supply installation 22 can be detected HDMI Dongle equipment 10, can detect MHL equipment 30 again, and MHL equipment 30 also can be obtained power supply from receiving equipment 20.
In the lump with reference to Fig. 1 and Fig. 3, the electrical block diagram that wherein Fig. 3 is automatic power system first embodiment of the utility model based on the HDMI interface.
In the present embodiment, the one HDMI interface 11 is connected by the HDMI line with the 2nd HDMI interface 21, the one HDMI interface 11 number of pins contained with the 2nd HDMI interface 21 is identical, and a HDMI interface 11 and the 2nd HDMI interface 21 are the HDMI interface of standard, all contain 19 stitch.The present embodiment only illustrates the annexation of part stitch, as shown in Figure 3, the feeder ear VCC1 of the one HDMI interface 11 is connected with the feeder ear VCC2 of the 2nd HDMI interface 21, the data terminal SDA1 of the one HDMI interface 11 is connected with the data terminal SDA2 of the 2nd HDMI interface 21, the clock end SCL1 of the one HDMI interface 11 is connected with the clock end SCL2 of the 2nd HDMI interface 21, and the consumer electronics control end CEC1 of a HDMI interface 11 is connected with the consumer electronics control end CEC2 of the 2nd HDMI interface 21.
The feeder ear VCC1 of the one HDMI interface 11 is connected with clock end SCL1 with the data terminal SDA1 of a HDMI interface 11 respectively, the consumer electronics control end CEC1 ground connection of a HDMI interface 11.
Particularly, HDMI Dongle equipment 10 also comprises the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3, the first resistance R 1 is as the isolation resistance of the consumer electronics control end CEC1 of a HDMI interface 11, one end of the first resistance R 1 is connected with the consumer electronics control end CEC1 of a HDMI interface 11, the other end ground connection of the first resistance R 1; One end of the second resistance R 2 is connected with the feeder ear VCC1 of a HDMI interface 11, and the other end is connected with the data terminal SDA1 of a HDMI interface; The feeder ear VCC1 of one end of the 3rd resistance R 3 and a HDMI interface, the other end is connected with the clock end SCL1 of a HDMI interface 11.。
In the present embodiment, testing circuit 221 comprises triode Q1, the first capacitor C 1, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6, and in the present embodiment, triode Q1 is NPN type triode.
Wherein, the base stage of triode Q1 detects input as first of testing circuit 221, with the consumer electronics control end CEC2 of the 2nd HDMI interface 21, be connected, and be connected with power input POWER via the 6th resistance R 6, the collector electrode of triode Q1 is as the output of testing circuit 221, be connected with the Enable Pin of switching circuit of power supply 222, and be connected the grounded emitter of triode Q1 via the 5th resistance R 5 with power input POWER; One end of the first capacitor C 1 is connected with the collector electrode of triode Q1, other end ground connection, and the 4th resistance R 4 is in parallel with the first capacitor C 1.
Particularly, testing circuit 221 also comprises the 7th resistance R 7 and the 8th resistance R 8, and wherein the 7th resistance R 7 is as the isolation resistance of the consumer electronics control end CEC2 of the 2nd HDMI interface 21.One end of the 7th resistance R 7 is connected with the consumer electronics control end CEC2 of the 2nd HDMI interface 21, and the other end of the 7th resistance R 7 is connected with the base stage of triode Q1.One end of the 8th resistance R 8 is connected with the base stage of triode Q1, the other end ground connection of the 8th resistance R 8.
In the present embodiment, switching circuit of power supply 222 comprises mains switch chip U1 and the second double diode D2, when wherein the second double diode D2 turn-offs for the switching tube in mains switch chip U1 inside, prevent from outputing to from the operating voltage of power input POWER input the feeder ear VCC2 of the 2nd HDMI interface 21; Mains switch chip U1 comprises input pin VIN, enables pin EN, output pin VOUT and grounding leg GND, input pin VIN is as the input of switching circuit of power supply 222, with power input, POWER is connected, enable the Enable Pin of pin EN as switching circuit of power supply 222, with the collector electrode of triode Q1, be connected, output pin VOUT, as the output of switching circuit of power supply 222, is connected grounding leg GND ground connection with the feeder ear VCC2 of the 2nd HDMI interface 21; The first anode b1 of the second double diode D2 is connected with power input POWER, the second plate b2 of the second double diode D2 is connected with output pin VOUT, and the common cathode b3 of the second double diode D2 is connected with clock end SCL2 with the data terminal SDA2 of the 2nd HDMI interface 21 respectively.
Particularly, switching circuit of power supply 222 also comprises the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 9th resistance R 9 and the tenth resistance R 10; One end of the second capacitor C 2 is connected with power input POWER, other end ground connection; One end of the 3rd capacitor C 3 is connected with the pin EN that enables of mains switch chip U1, other end ground connection; The positive pole of the 4th capacitor C 4 is connected with the output pin VOUT of mains switch chip U1, the minus earth of the 4th capacitor C 4; One end of the 5th capacitor C 5 is connected with the output pin VOUT of mains switch chip U1, other end ground connection; One end of the 9th resistance R 9 is connected with the common cathode b3 of the second double diode D2, the other end is connected with the data terminal SDA2 of the 2nd HDMI interface 21, one end of the tenth resistance R 10 is connected with the common cathode b3 of the second double diode D2, and the other end is connected with the clock end SCL2 of the 2nd HDMI interface 21.
As shown in Figure 3, the operation principle of the automatic power system based on the HDMI interface is as follows:
When HDMI Dongle equipment 10 connects receiving equipment 20(as television set), when a HDMI interface 11 is connected by the HDMI line with the 2nd HDMI interface 21, because the consumer electronics control end CEC1 of a HDMI interface 11 receives ground via the first resistance R 1, therefore the consumer electronics control end CEC2 of the 2nd HDMI interface 21 is also dragged down, thereby the base stage of triode Q1 is low level, triode Q1 cut-off, owing on the 5th resistance R 5, drawing effect, the collector electrode of triode Q1 is high level, thereby the pin EN that enables of mains switch chip U1 is also high level, the switching tube conducting of mains switch chip U1 inside, the operating voltage of inputting from power input POWER outputs to the feeder ear VCC2 of the 2nd HDMI interface 21 by the output pin VOUT of mains switch chip U1, and then output to again the feeder ear VCC1 of a HDMI interface 11 on HDMI Dongle equipment 10 by the HDMI line, give HDMI Dongle equipment 10 power supplies.
In the lump with reference to Fig. 2 and Fig. 4, the electrical block diagram that wherein Fig. 4 is automatic power system second embodiment of the utility model based on the HDMI interface.
In the present embodiment, MHL interface 31 is connected by the MHL line with the 2nd HDMI interface 21, and the HDMI interface that the 2nd HDMI interface 21 is standard, contain 19 stitch, and the MHL interface that MHL interface 31 is standard contains 5 stitch.The present embodiment only illustrates the annexation of part stitch, as shown in Figure 4, the first general input/output port GPIO1 of microcontroller 23 is connected with the data mask end Data2 shield of the 2nd HDMI interface 21, and the second general input/output port GPIO2 of microcontroller 23 is connected to second of testing circuit 221 and detects input; The feeder ear VBUS of MHL interface 31 is connected with the feeder ear VCC2 of the 2nd HDMI interface 21, and the command transfer end CBUS of MHL interface 31 is connected with the data mask end Data2 shield of the 2nd HDMI interface 21.
In Fig. 4, testing circuit 221 comprises the first double diode D1, triode Q1, the first capacitor C 1, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6.
Wherein, the base stage of triode Q1 is connected with the consumer electronics control end CEC2 of the 2nd HDMI interface 21, and be connected with power input POWER via the 6th resistance R 6, the collector electrode of triode Q1 is connected with the first anode a1 of the first double diode D1, and be connected the grounded emitter of triode Q1 with power input POWER via the 5th resistance R 5; The second plate a2 of the first double diode D1 detects input as second of testing circuit 221, with the second general input/output port GPIO2 of microcontroller 23, be connected, the common cathode a3 of the first double diode D1, as the output of testing circuit 221, is connected with the Enable Pin of switching circuit of power supply 222; One end of the first capacitor C 1 is connected with the collector electrode of triode Q1, other end ground connection, and the 4th resistance R 4 is in parallel with the first capacitor C 1.
Particularly, testing circuit 221 also comprises the 7th resistance R 7 and the 8th resistance R 8, and wherein the 7th resistance R 7 is as the isolation resistance of the consumer electronics control end CEC2 of the 2nd HDMI interface 21.One end of the 7th resistance R 7 is connected with the consumer electronics control end CEC2 of the 2nd HDMI interface 21, and the other end of the 7th resistance R 7 is connected with the base stage of triode Q1.One end of the 8th resistance R 8 is connected with the base stage of triode Q1, the other end ground connection of the 8th resistance R 8.
In the present embodiment, switching circuit of power supply 222 comprises mains switch chip U1 and the second double diode D2, wherein the second double diode D2 is for when the switching tube of mains switch chip U1 inside turn-offs, and prevents from the feeder ear VCC2 of the 2nd HDMI interface 21 of the operating voltage output of power input POWER input; Mains switch chip U1 comprises input pin VIN, enables pin EN, output pin VOUT and grounding leg GND, input pin VIN is as the input of switching circuit of power supply 222, with power input, POWER is connected, enable the Enable Pin of pin EN as switching circuit of power supply 222, with the common cathode a3 of the first double diode D1, be connected, output pin VOUT, as the output of switching circuit of power supply 222, is connected grounding leg GND ground connection with the feeder ear VCC2 of the 2nd HDMI interface 21; The first anode b1 of the second double diode D2 is connected with power input POWER, the second plate b2 of the second double diode D2 is connected with output pin VOUT, and the common cathode b3 of the second double diode D2 is connected with clock end SCL2 with the data terminal SDA2 of the 2nd HDMI interface 21 respectively.
Particularly, switching circuit of power supply 222 also comprises the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 9th resistance R 9 and the tenth resistance R 10; One end of the second capacitor C 2 is connected with power input POWER, other end ground connection; One end of the 3rd capacitor C 3 is connected with the pin EN that enables of mains switch chip U1, other end ground connection; The positive pole of the 4th capacitor C 4 is connected with the output pin VOUT of mains switch chip U1, the minus earth of the 4th capacitor C 4; One end of the 5th capacitor C 5 is connected with the output pin VOUT of mains switch chip U1, other end ground connection; One end of the 9th resistance R 9 is connected with the common cathode b3 of the second double diode D2, the other end is connected with the data terminal SDA2 of the 2nd HDMI interface 21, one end of the tenth resistance R 10 is connected with the common cathode b3 of the second double diode D2, and the other end is connected with the clock end SCL2 of the 2nd HDMI interface 21.
As shown in Figure 4, the operation principle of the automatic power system based on the HDMI interface is as follows:
In the situation of the compatible MHL technology of the 2nd HDMI interface 21 of receiving equipment 20, MHL equipment 30 is the same with HDMI Dongle equipment 10 also can connect receiving equipment 20, be that receiving equipment 20 both can be connected with HDMI Dongle equipment 10 by the 2nd HDMI interface 21, can be connected with MHL equipment 30 again.When receiving equipment 20 connects MHL equipment 30, when the 2nd HDMI interface 21 is connected by the MHL line with MHL interface 31, export the MHL connection signal MHL_CD_SEN of high level from the data mask end Data2 shield of the 2nd HDMI interface 21, this MHL connects signal MHL_CD_SEN and outputs on the first general input/output port GPIO1 of microcontroller 23, after microcontroller 23 detects the MHL connection signal MHL_CD_SEN of this high level, the MHL detection signal MHL_SEN of output high level is to the second plate a2 of the first double diode D1, the second plate a2 of the first double diode D1 is high level.While due to receiving equipment 20, connecting MHL equipment 30, the consumer electronics control end CEC2 of the 2nd HDMI interface 21 is in vacant state, therefore the conducting of triode Q1 or cut-off are not subject to the control of the consumer electronics control end CEC2 of the 2nd HDMI interface 21, and due to have the 6th resistance R 6 on draw effect, be added to the base stage of triode Q1 through the 6th resistance R 6 from the operating voltage of power input POWER input, the base stage of triode Q1 is high level, triode Q1 conducting, thereby the collector electrode of triode Q1 is low level, the first anode a1 of the first double diode D1 is also low level.Now the first anode a1 due to the first double diode D1 is low level, and the second plate a2 of the first double diode D1 is high level, therefore the power supplying control signal of the common cathode a3 of the first double diode D1 output high level enables pin EN to mains switch chip U1, the pin EN that enables of mains switch chip U1 is high level, the switching tube conducting of mains switch chip U1 inside, output to the feeder ear VCC2 of the 2nd HDMI interface 21 by mains switch chip U1 from the operating voltage of power input POWER input, and then output to again the feeder ear VBUS of MHL interface 31 on MHL equipment 30 by the MHL line, give MHL equipment 30 power supplies.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (10)
1. the automatic power system based on the HDMI interface, comprise HDMIDongle equipment and receiving equipment, described HDMIDongle equipment comprises a HDMI interface, described receiving equipment comprises the 2nd HDMI interface, it is characterized in that, described receiving equipment also comprises electric supply installation, and described electric supply installation comprises for the power input of input service voltage, for detection of described the 2nd HDMI interface and export the testing circuit of power supplying control signal and for whether control the switching circuit of power supply to the power supply of HDMIDongle equipment according to described power supplying control signal; Wherein,
A described HDMI interface is connected by the HDMI line with described the 2nd HDMI interface; The consumer electronics control end of described the 2nd HDMI interface detects input with first of described testing circuit and is connected; The output of described testing circuit is connected with the Enable Pin of described switching circuit of power supply, and the input of described switching circuit of power supply is connected with described power input, and the output of described switching circuit of power supply is connected with the feeder ear of described the 2nd HDMI interface.
2. automatic power system as claimed in claim 1, is characterized in that, the feeder ear of a described HDMI interface is connected with the clock end with the data terminal of a described HDMI interface respectively, the consumer electronics control end ground connection of a described HDMI interface.
3. automatic power system as claimed in claim 2, it is characterized in that, described HDMIDongle equipment also comprises the first resistance, the second resistance and the 3rd resistance, and an end of described the first resistance is connected with the consumer electronics control end of a described HDMI interface, other end ground connection; One end of described the second resistance is connected with the feeder ear of a HDMI interface, and the other end is connected with the data terminal of a HDMI interface; One end of described the 3rd resistance and the feeder ear of a HDMI interface, the other end is connected with the clock end of a HDMI interface.
4. automatic power system as claimed in claim 3, is characterized in that, described testing circuit comprises triode, the first electric capacity, the 4th resistance, the 5th resistance and the 6th resistance; Wherein,
The base stage of described triode detects input as first of described testing circuit, with the consumer electronics control end of described the 2nd HDMI interface, be connected, and be connected with described power input via described the 6th resistance, the collector electrode of described triode is as the output of described testing circuit, with the Enable Pin of described switching circuit of power supply, be connected, and be connected the grounded emitter of described triode with described power input via described the 5th resistance; One end of described the first electric capacity is connected with the collector electrode of described triode, other end ground connection, described the 4th resistance and described the first Capacitance parallel connection.
5. automatic power system as claimed in claim 1, is characterized in that, described automatic power system also comprises MHL equipment, and described MHL equipment comprises the MHL interface, and described receiving equipment also comprises microcontroller;
The first general input/output port of described microcontroller is connected with the data mask end of described the 2nd HDMI interface, and the second general input/output port of described microcontroller is connected to second of described testing circuit and detects input;
The feeder ear of described MHL interface is connected with the feeder ear of described the 2nd HDMI interface, and the command transfer end of described MHL interface is connected with the data mask end of described the 2nd HDMI interface.
6. automatic power system as claimed in claim 5, is characterized in that, described testing circuit comprises triode, the first double diode, the first electric capacity, the 4th resistance, the 5th resistance and the 6th resistance; Wherein,
The base stage of described triode is connected with the consumer electronics control end of described the 2nd HDMI interface, and be connected with described power input via described the 6th resistance, the collector electrode of described triode is connected with the first anode of described the first double diode, and be connected the grounded emitter of described triode with described power input via described the 5th resistance; The second plate of described the first double diode detects input as second of described testing circuit, with the second general input/output port of described microcontroller, be connected, the common cathode of described the first double diode, as the output of described testing circuit, is connected with the Enable Pin of described switching circuit of power supply; One end of described the first electric capacity is connected with the collector electrode of described triode, other end ground connection, described the 4th resistance and described the first Capacitance parallel connection.
7. automatic power system as described as claim 4 or 6, is characterized in that, described testing circuit also comprises the 7th resistance and the 8th resistance; One end of described the 7th resistance is connected with the consumer electronics control end of described the 2nd HDMI interface, and the other end is connected with the base stage of described triode; One end of described the 8th resistance is connected with the base stage of described triode, other end ground connection.
8. automatic power system as claimed in claim 4, is characterized in that, described switching circuit of power supply comprises mains switch chip and the second double diode, and described mains switch chip comprises input pin, enables pin, output pin and grounding leg; Wherein,
Described input pin is as the input of described switching circuit of power supply, with described power input, be connected, the described Enable Pin of pin as described switching circuit of power supply that enable, with the collector electrode of described triode, be connected, described output pin is as the output of described switching circuit of power supply, be connected described grounding leg ground connection with the feeder ear of described the 2nd HDMI interface; The first anode of described the second double diode is connected with described power input, and the second plate of described the second double diode is connected with described output pin, and the common cathode of described the second double diode is connected with the clock end with the data terminal of described the 2nd HDMI interface respectively.
9. automatic power system as claimed in claim 6, is characterized in that, described switching circuit of power supply comprises mains switch chip and the second double diode, and described mains switch chip comprises input pin, enables pin, output pin and grounding leg; Wherein,
Described input pin is as the input of described switching circuit of power supply, with described power input, be connected, the described Enable Pin of pin as described switching circuit of power supply that enable, with the common cathode of described the first double diode, be connected, described output pin is as the output of described switching circuit of power supply, be connected described grounding leg ground connection with the feeder ear of described the 2nd HDMI interface; The first anode of described the second double diode is connected with described power input, and the second plate of described the second double diode is connected with described output pin, and the common cathode of described the second double diode is connected with the clock end with the data terminal of described the 2nd HDMI interface respectively.
10. automatic power system as claimed in claim 8 or 9, is characterized in that, described switching circuit of power supply also comprises the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 9th resistance and the tenth resistance; One end of described the second electric capacity is connected with described power input, other end ground connection; One end of described the 3rd electric capacity is connected with the pin that enables of described mains switch chip, other end ground connection; The positive pole of described the 4th electric capacity is connected with the output pin of described mains switch chip, minus earth; One end of described the 5th electric capacity is connected with the output pin of described mains switch chip, other end ground connection; One end of described the 9th resistance is connected with the common cathode of described the second double diode, and the other end is connected with the data terminal of the 2nd HDMI interface; One end of described the tenth resistance is connected with the common cathode of described the second double diode, and the other end is connected with the clock end of the 2nd HDMI interface.
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| CN 201320383999 CN203368616U (en) | 2013-06-28 | 2013-06-28 | Automatic power supply system based on HDMI interfaces |
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| CN 201320383999 CN203368616U (en) | 2013-06-28 | 2013-06-28 | Automatic power supply system based on HDMI interfaces |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105100667A (en) * | 2015-08-31 | 2015-11-25 | 深圳创维－Rgb电子有限公司 | Play device and signal input control method thereof |
| CN105554428A (en) * | 2016-01-29 | 2016-05-04 | 龙迅半导体（合肥）股份有限公司 | HDMI signal sending device and receiving device and power supply system based on HDMI interface |
| CN106713795A (en) * | 2016-12-20 | 2017-05-24 | 深圳Tcl数字技术有限公司 | TV stick power supply method and apparatus |
| WO2018086221A1 (en) * | 2016-11-09 | 2018-05-17 | 深圳Tcl数字技术有限公司 | Hdmi interface circuit for master device and method for supplying power to slave device on basis of hdmi interface |
| WO2019062519A1 (en) * | 2017-09-27 | 2019-04-04 | 京东方科技集团股份有限公司 | Interface device and display device |
-
2013
- 2013-06-28 CN CN 201320383999 patent/CN203368616U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105100667A (en) * | 2015-08-31 | 2015-11-25 | 深圳创维－Rgb电子有限公司 | Play device and signal input control method thereof |
| CN105100667B (en) * | 2015-08-31 | 2018-05-08 | 深圳创维－Rgb电子有限公司 | playing device and its signal input control method |
| CN105554428A (en) * | 2016-01-29 | 2016-05-04 | 龙迅半导体（合肥）股份有限公司 | HDMI signal sending device and receiving device and power supply system based on HDMI interface |
| WO2018086221A1 (en) * | 2016-11-09 | 2018-05-17 | 深圳Tcl数字技术有限公司 | Hdmi interface circuit for master device and method for supplying power to slave device on basis of hdmi interface |
| CN106713795A (en) * | 2016-12-20 | 2017-05-24 | 深圳Tcl数字技术有限公司 | TV stick power supply method and apparatus |
| WO2019062519A1 (en) * | 2017-09-27 | 2019-04-04 | 京东方科技集团股份有限公司 | Interface device and display device |
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