CN205336425U - HDMI signal transmission equipment and receiving equipment , based on power supply system of HDMI interface - Google Patents
HDMI signal transmission equipment and receiving equipment , based on power supply system of HDMI interface Download PDFInfo
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- CN205336425U CN205336425U CN201620106563.3U CN201620106563U CN205336425U CN 205336425 U CN205336425 U CN 205336425U CN 201620106563 U CN201620106563 U CN 201620106563U CN 205336425 U CN205336425 U CN 205336425U
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Abstract
The utility model discloses a HDMI signal transmission equipment and receiving equipment to and contain this HDMI signal transmission equipment and receiving equipment's the power supply system based on the HDMI interface. In HDMI signal transmission equipment, its the 14 pin ground connection, the utility model provides a HDMI signal reception equipment includes the MOS pipe, the MOS pipe switch on the voltage control who receives on the 14 pin, work as the utility model provides a HDMI signal transmission equipment with the utility model provides a HDMI signal reception is the HDMI back that links together for the equipment, and the 14 pin of the 2nd HDMI interface of HDMI signal reception equipment is also by ground connection, and at this moment, PMOS pipe grid voltage be 0, NMOS pipe grid voltage and is the high potential, and the MOS piping leads to, so, the operating voltage that the power supply unit of HDMI signal reception equipment provided can transmit the 18 pin of the 2nd HDMI interface to, therefore the power supply just can be obtained through the 18 pin pin18 of its HDMI interface to HDMI signal transmission equipment.
Description
Technical field
This utility model relates to HDMI technical field, particularly relates to a kind of HDMI apparatus for transmitting signal and reception equipment, and includes this HDMI apparatus for transmitting signal and the electric system based on HDMI of the equipment of reception。
Background technology
Commonly used along with HDMI (High-DefinitionMutimediaInterface, high-definition multimedia audio-video interface) technology, various HDMI apparatus for transmitting signal such as Blu-ray player, computers etc. containing HDMI arise at the historic moment。And along with the development of technology, HDMI apparatus for transmitting signal can be mobile equipment, such as mobile phone, iPad, computer notebook etc.。
HDMI apparatus for transmitting signal must under the premise obtaining power supply could normal operation, at present, HDMI apparatus for transmitting signal can only rely on external power supply obtain power supply or rely on built-in battery power supply system to obtain power supply。But, when be in there is no external power supply when, if being not provided with battery power supply system in HDMI apparatus for transmitting signal, then HDMI apparatus for transmitting signal can not work, if be provided with battery power supply system in HDMI apparatus for transmitting signal, HDMI apparatus for transmitting signal can only rely on the battery power supply system of himself to power, but, the electricity of battery power supply system is limited, and after electricity exhausts, HDMI apparatus for transmitting signal can not normal operation。
Utility model content
Inventor studies discovery, during HDMI apparatus for transmitting signal normal operation, generally to connect with HDMI signal receiver such as television set, display etc., and HDMI signal receiver is generally display device, these display devices are generally individually is provided with independent current source, therefore, when HDMI apparatus for transmitting signal is connected with HDMI signal receiver, HDMI signal receiver has the ability to power to HDMI apparatus for transmitting signal。Power to HDMI apparatus for transmitting signal if able to realize HDMI signal receiver, then can guarantee that the normal operation of HDMI apparatus for transmitting signal。
In view of this, this utility model provides a kind of HDMI apparatus for transmitting signal, HDMI signal receiver and include the electric power system based on HDMI of this HDMI apparatus for transmitting signal and HDMI signal receiver, utilize upstream transmitting terminal (i.e. HDMI apparatus for transmitting signal) to accepted downstream end (i.e. HDMI signal receiver) existing supplying channels, after realizing HDMI signal receiver and the connection of HDMI apparatus for transmitting signal, HDMI signal receiver is powered to HDMI apparatus for transmitting signal, avoid simultaneously upstream power and downstream power short circuit cause short circuit situation。
In order to realize above-mentioned utility model purpose, this utility model adopts the technical scheme that
A kind of HDMI apparatus for transmitting signal, including the first HDMI, the 14th pin pin14 ground connection of described first HDMI。
Alternatively, described HDMI apparatus for transmitting signal also includes: the first electric supply installation, diode and system power supply, and the power input of described first electric supply installation is connected with the 18th pin pin18 of described first HDMI and described system power supply respectively by described diode；
The power input of described system power supply is connected with the 18th pin pin18 of described first HDMI。
A kind of HDMI signal receiver, including the second HDMI, the second electric supply installation, metal-oxide-semiconductor and the first resistance；
Wherein, when described metal-oxide-semiconductor is PMOS, the power input of described second electric supply installation is connected with the source electrode of described PMOS；The drain electrode of described PMOS is connected with the 18th pin pin18 of described second HDMI, and the grid of described metal-oxide-semiconductor is connected with the source electrode of described metal-oxide-semiconductor by described first resistance；The grid of described metal-oxide-semiconductor is connected with the 14th pin pin14 of described second HDMI；
When described metal-oxide-semiconductor is NMOS tube, described HDMI signal receiver also includes: be arranged on the phase inverter between the 14th pin pin14 and the described NMOS tube grid of described second HDMI；The input of described phase inverter is connected with described 14th pin pin14, and the outfan of described phase inverter is connected with the grid of described NMOS tube；
The power input of described second electric supply installation is connected with the drain electrode of described NMOS tube；
The grid of described NMOS tube is connected with the source electrode of described NMOS tube by described first resistance, and the outfan of described phase inverter is connected with described first resistance；
The source electrode of described NMOS tube is connected with the 18th pin pin18 of described second HDMI。
Alternatively, described HDMI signal receiver also includes: the second resistance being serially connected and the 3rd resistance, one end of described second resistance is connected with the 18th pin pin18 of described second HDMI, the other end of described second resistance is connected with one end of described 3rd resistance, the other end ground connection of described 3rd resistance。
Alternatively, described HDMI signal receiver also includes the microprocessor being arranged between the 14th pin pin14 and the described metal-oxide-semiconductor grid of described second HDMI, described microprocessor is for detecting the current potential of the 14th pin pin14 of described second HDMI, and the conducting of metal-oxide-semiconductor is whether according to the control of Electric potentials of the 14th pin pin14 of described second HDMI。
Alternatively, described HDMI signal receiver also includes the current detection circuit being arranged between the 18th pin pin18 and the drain electrode of described metal-oxide-semiconductor of described second HDMI, described current detection circuit is for detecting the current signal on its place branch road, and by described current signal transfer to described microprocessor；
Described microprocessor is additionally operable to judge that whether described current signal is qualified, if it is, control metal-oxide-semiconductor conducting, if it does not, control metal-oxide-semiconductor cut-off。
A kind of electric power system based on HDMI, including: HDMI apparatus for transmitting signal and HDMI signal receiver, described HDMI apparatus for transmitting signal is the HDMI apparatus for transmitting signal described in any of the above-described item, and described HDMI signal receiver is the HDMI signal receiver described in any of the above-described item
Wherein, described first HDMI is connected by HDMI wire with described second HDMI。
Compared to prior art, this utility model has the advantages that
In traditional HDMI apparatus for transmitting signal, 14th pin pin14 of its HDMI is unsettled, it is idle pin, the HDMI apparatus for transmitting signal that this utility model provides is by the 14th pin Pin14 ground connection, the HDMI signal receiver that this utility model provides includes metal-oxide-semiconductor, when metal-oxide-semiconductor is PMOS, the grid of PMOS and the 14th pin of the second HDMI are directly connected to, when metal-oxide-semiconductor is NMOS tube, the grid of NMOS tube is connected by the 14th pin of phase inverter and the second HDMI, therefore, the conducting of metal-oxide-semiconductor is by the Control of Voltage on the 14th pin, after the HDMI apparatus for transmitting signal of this utility model offer and the HDMI signal receiver HDMI of this utility model offer link together, 14th pin pin14 of the second HDMI of HDMI signal receiver is also grounded, now, gate pmos pole tension is 0, NMOS tube grid voltage is high potential, therefore, metal-oxide-semiconductor turns on, so, utilize upstream transmitting terminal and HDMI apparatus for transmitting signal to accepted downstream end and the existing supplying channels of HDMI signal receiver (the 18th pin pin18 of the HDMI in two equipment connects the passage formed), the running voltage that the electric supply installation of HDMI signal receiver provides can be transferred to the 18th pin pin18 of the second HDMI, so, HDMI apparatus for transmitting signal just can pass through the 18th pin pin18 of its first HDMI and obtain power supply。
So, the electric power system of the HDMI apparatus for transmitting signal provided by this utility model and reception equipment composition, HDMI apparatus for transmitting signal can obtain power supply from connected HDMI signal receiver, so, this electric power system solves how HDMI apparatus for transmitting signal obtains the problem of power supply from HDMI signal receiver, greatly reduces HDMI apparatus for transmitting signal and causes the possibility of its cisco unity malfunction because lacking power supply。
Additionally, this utility model embodiment is simply by idle pin ground connection original in HDMI, the HDMI after change still conforms to HDMI specification。
It addition, in the HDMI signal receiver of this utility model embodiment offer, increase only a metal-oxide-semiconductor, so, compared to the circuit structure of prior art, this circuit structure is changed less, and circuit structure is simple, less costly。
Accompanying drawing explanation
In order to be expressly understood detailed description of the invention of the present utility model, the accompanying drawing used when this utility model detailed description of the invention is described below does a brief description。
Fig. 1 is the electric power system structural representation based on HDMI that this utility model embodiment one provides；
Fig. 2 is the electric power system structural representation based on HDMI that this utility model embodiment two provides；
Fig. 3 is the electric power system structural representation based on HDMI that this utility model embodiment one provides；
Fig. 4 is the electric power system structural representation based on HDMI that this utility model embodiment one provides。
Detailed description of the invention
For making utility model purpose of the present utility model, technical scheme and technique effect clearly, completely, below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail。
Embodiment one
Fig. 1 is the electric power system structural representation based on HDMI that this utility model embodiment provides。As shown in Figure 1, HDMI apparatus for transmitting signal 10 and HDMI signal receiver 20 should be included based on the electric power system of HDMI, wherein, HDMI apparatus for transmitting signal 10 includes the first HDMI 11, HDMI signal receiver 20 includes the second HDMI 21, wherein, the first HDMI 11 and the second HDMI 21 are connected by HDMI wire 30。
In this utility model embodiment, the first HDMI 11 and the second HDMI 21 are standard HDMI, all include 19 pins。Exemplarily, Fig. 1 only illustrates and part pin, and wherein, the part pin exemplified includes the 14th pin pin14nc and the 18 pin pin18vcc。Wherein, the 14th pin pin14nc1 of the first HDMI 11 connects the 14th pin pin14nc2 of the second HDMI 21, and the 18th pin pin18vcc1 of the first HDMI 11 connects the 18th pin pin18vcc2 of the second HDMI 21 and connects。The 18th pin pin18vcc1 and the 18 pin pin18vcc2 after connection constitutes the supplying channels that HDMI signal receiver is powered to HDMI apparatus for transmitting signal。
It should be noted that, in the prior art, the 18th pin pin18 of the 18th pin pin18 and HDMI signal receiver of HDMI apparatus for transmitting signal is connected the supplying channels that the passage formed is HDMI apparatus for transmitting signal and upstream transmitting terminal is powered to HDMI signal receiver and accepted downstream end。This is because, in existing HDMI apparatus for transmitting signal work process, HDMI apparatus for transmitting signal generally to provide a running voltage more than 100mA to HDMI signal receiver, this running voltage is generally 5V, this running voltage is returned to transmission equipment by reception equipment, it is used to refer to reception equipment to be connected, this running voltage provides power supply also to the EDIDEPROM of reception equipment simultaneously, facilitate transmission equipment when reception equipment does not power on, read the important information of accepted downstream equipment。
Therefore, the electric power system based on HDMI that this utility model provides, utilize existing upstream transmitting terminal (i.e. HDMI apparatus for transmitting signal) to accepted downstream end (i.e. HDMI signal receiver) existing supplying channels, after achieving HDMI signal receiver and the connection of HDMI apparatus for transmitting signal, HDMI signal receiver is powered to HDMI apparatus for transmitting signal, avoid simultaneously upstream power and downstream power short circuit cause short circuit situation。
In HDMI specification, the 18th pin pin18vcc is+5Vpower, and HDMI apparatus for transmitting signal provides 5Vpower to pin18, HDMI signal receiver to detect the voltage on this pin。
Concrete structure below in conjunction with Fig. 1 HDMI apparatus for transmitting signal 10 that this utility model embodiment is provided and HDMI signal receiver 20 is described in detail。
As it is shown in figure 1, this HDMI apparatus for transmitting signal 10 is except including the first HDMI 11, it is also possible to include the first electric supply installation 12, diode 13 and system power supply 14。
It should be noted that in this utility model embodiment, the 14th pin pin14nc1 ground connection, the current potential of the pin pin14nc1 after ground connection is down to 0。
The power input of described first electric supply installation 12 is connected with described system power supply 14 by described diode 13。The power input of the first electric supply installation 12 is connected by the 18th pin pin18vcc1 of described diode 13 with described first HDMI 11；The power input of described system power supply 14 is connected with the 18th pin pin18vcc1 of described first HDMI 11。The effect of diode 13 is in that the power delivery that can be exported by the first electric supply installation 12 is to the 18th pin pin18vcc1 of system power supply 14 and the first HDMI, and electrical transfer on system power supply the 14 and the 18th pin pin18vcc1 can not be made to the first electric supply installation 12。
It should be noted that in this utility model embodiment, the first electric supply installation 12 can be arranged on the battery power supply system within HDMI apparatus for transmitting signal 10, it is also possible to for external power adapter。After the external power adapter of HDMI apparatus for transmitting signal connects upper external power supply, when this HDMI apparatus for transmitting signal works, it can pass through external power adapter and external power supply obtains power supply。When having electricity in the battery power supply system of HDMI apparatus for transmitting signal, when this HDMI apparatus for transmitting signal works, it can V acquirement power supply in this battery power supply system。
It should be noted that the HDMI apparatus for transmitting signal conventional compared to this area, the 14th pin pin14 of its first HDMI is only changed by the HDMI apparatus for transmitting signal 10 that this utility model provides。Owing to, in conventional HDMI apparatus for transmitting signal, what signal the 14th pin pin14 does not take over, so, the HDMI apparatus for transmitting signal 10 that this utility model provides can be connected normal use with the HDMI signal receiver of this area routine and HDMISink。In other words, the HDMI apparatus for transmitting signal 10 that this utility model provides can the conventional HDMI signal receiver in compatible this area。
Additionally, when the HDMI apparatus for transmitting signal 10 that utility model provides does not connect with HDMI signal receiver, HDMI apparatus for transmitting signal 10 can pass through the first electric supply installation 12 and obtain power supply, now, the power supply of the first electric supply installation output is supplied on the 18th pin pin18vcc1 of the first HDMI 11 by diode 13。If the first electric supply installation 12 can not be powered for HDMI apparatus for transmitting signal 10, now, HDMI apparatus for transmitting signal 10 cannot obtain power supply, it is impossible to normal operation。
The detailed description of the invention of the HDMI apparatus for transmitting signal provided for this utility model embodiment above。
Below in conjunction with Fig. 1, the detailed description of the invention of the HDMI signal receiver that this utility model embodiment provides is described in detail。
It should be noted that, the HDMI apparatus for transmitting signal that the HDMI signal receiver that this utility model embodiment provides can provide with this utility model embodiment can be with the use of, and the HDMI apparatus for transmitting signal that this utility model embodiment provides is when can not obtain power supply, after its HDMI signal receiver provided with this utility model embodiment connects, this HDMI apparatus for transmitting signal can obtain power supply from this HDMI signal receiver, thus realizing the normal operation of whole system。
Additionally, the HDMI signal receiver that this utility model embodiment provides can also be conventional with this area HDMI apparatus for transmitting signal with the use of。In other words, the HDMI signal receiver that this utility model embodiment provides can the conventional HDMI apparatus for transmitting signal in compatible this area。
As it is shown in figure 1, a kind of HDMI signal receiver 20 that this utility model embodiment provides is except the second HDMI 21, also include the second electric supply installation 22, PMOS 23 and the first resistance R1；
As it has been described above, the second HDMI 21 is standard HDMI, containing 19 pins。Exemplarily, Fig. 1 only illustrates part pin, and wherein, the part exemplified includes the 14th pin pin14nc2 and the 18 pin pin18vcc2。
Wherein, described second electric supply installation 22 includes the power input for input service voltage, and this power input is connected with the source electrode of described PMOS 23；
The drain electrode of described PMOS 23 is connected with the 18th pin pin18vcc2 of described second HDMI 21, and the grid of described PMOS 23 is connected with the source electrode of described PMOS 23 by described first resistance R1；The grid of described PMOS 23 is connected with the 14th pin pin14nc2 of described second HDMI 21。Exemplarily, the resistance of the first resistance R1 can be 10k Ω。
Owing to PMOS is low-voltage conducting, so, when current potential on the 14th pin pin14 of the second HDMI 21 is electronegative potential, the grid voltage of PMOS 23 is low-voltage, now, PMOS 23 turns on, and so, the running voltage of the power input output of the second electric supply installation 22 can be transferred on the 18th pin pin18vcc of the second HDMI 21。
In addition, continue as shown in Figure 1, HDMI apparatus for transmitting signal described above can also include: the second resistance R2 and the three resistance R3 being serially connected, one end of described second resistance R2 is connected with the 18th pin pin18vcc2 of described second HDMI 21, the other end of described second resistance R2 is connected with one end of described 3rd resistance R3, the other end ground connection of described 3rd resistance R3。Wherein, the second resistance R2 and the three resistance R3 can be regarded as the divider resistance of the pin pin18vcc2 of the second HDMI 21。Can detect whether PMOS 23 turns on by detecting the voltage between the second resistance R2 and the 3rd resistance R3。When PMOS 23 turns on, the source voltage of this PMOS is identical with drain voltage or differs only small, owing to the source electrode of this PMOS 23 and the power input of the second electric supply installation 22 connect, when the second electric supply installation 22 is outwards powered, the running voltage that the source voltage of PMOS provides for the second electric supply installation 22, is generally 5V。Thus, when PMOS turns on, the running voltage 5V that the voltage in PMOS 23 drain electrode also provides for the second electric supply installation。Owing to the 18th pin pin18vcc2 of the second HDMI 21 is connected with the drain electrode of PMOS 23, so, the running voltage 5V that the voltage on the 18th pin pin18vcc2 of the second HDMI also provides for the second electric supply installation 22。In this case, under the dividing potential drop effect of the second resistance R2 and the three resistance R3, the running voltage that the voltage detected between the second resistance R2 and the 3rd resistance R3 provides for the second electric supply installation 22, the detection current potential obtained is high potential, the running voltage provided due to the second electric supply installation 21 is generally 5V, so, when PMOS 23 turns on, the voltage detected between the second resistance R2 and the 3rd resistance R3 is also for 5V。When PMOS 23 turns off, the running voltage that the second electric supply installation 22 provides can not reach on the 18th pin pin18vcc2 of the second HDMI 21, so, now, the voltage detected between the second resistance R2 and the 3rd resistance R3 is 0V。
It should be noted that, when the HDMI signal receiver that the HDMI apparatus for transmitting signal that this utility model embodiment provides provides with this utility model embodiment is connected by HDMI wire, the 14th pin pin14nc1 ground connection due to the first HDMI of this HDMI apparatus for transmitting signal, thus, the current potential of the 14th pin pin14nc1 of the second HDMI of this HDMI signal receiver is pulled low to 0, now, gate pmos pole tension is 0, thus, PMOS turns on, now, if detecting voltage between the second resistance R2 and the 3rd resistance R3, the running voltage that the detection voltage obtained provides for the second electric supply installation。Otherwise, when the HDMI signal receiver that the HDMI apparatus for transmitting signal that this utility model embodiment provides provides with this utility model embodiment does not connect, PMOS 23 can not turn on, now, the voltage detected between the second resistance R2 and the 3rd resistance R3 is 0, therefore, the HDMI signal receiver whether the HDMI apparatus for transmitting signal provided by detecting the voltage between the second resistance R2 and the 3rd resistance R3 can detect embodiment provides with this utility model embodiment connects。
And, when the HDMI signal receiver that the HDMI apparatus for transmitting signal that utility model embodiment provides provides with this utility model embodiment is connected by HDMI wire, PMOS turns on, the running voltage that second electric supply installation provides can be supplied on the 18th pin pin18vcc2 of the second HDMI, now, if HDMI apparatus for transmitting signal does not have the first electric supply installation or cannot pass through the first electric supply installation acquirement power supply, HDMI apparatus for transmitting signal 10 can by obtaining power supply on the 18th pin pin18vcc1 of the first HDMI from HDMI signal receiver, when the electric supply installation that HDMI apparatus for transmitting signal 10 can pass through self obtains power supply, HDMI apparatus for transmitting signal 10 can preferentially adopt the electric supply installation of self to obtain power supply。Therefore, when the HDMI signal receiver that the HDMI apparatus for transmitting signal that utility model embodiment provides provides with this utility model embodiment is connected by HDMI wire, the HDMI apparatus for transmitting signal that this utility model embodiment provides can obtain power supply from the HDMI signal receiver that this utility model embodiment provides, in other words, the HDMI signal receiver that this utility model embodiment provides can be powered for the HDMI apparatus for transmitting signal that this utility model embodiment provides。
Additionally, when the HDMI signal receiver 20 that this utility model embodiment provides connects with the HDMI apparatus for transmitting signal of this area routine, owing to the 14th pin pin14nc of the HDMI of conventional HDMI apparatus for transmitting signal is unsettled, it can not drag down the current potential of the 14th pin pin14nc of the second HDMI of the HDMI signal receiver that this utility model embodiment provides, now, PMOS cannot turn on, therefore, the HDMI apparatus for transmitting signal that the HDMI signal receiver that embodiment provides can not be this area routine is powered, now, the function of the HDMI signal receiver that the function of the HDMI signal receiver that embodiment provides is conventional with this area is identical, it can carry out the transmission of HDMI signal with conventional HDMI apparatus for transmitting signal。
The detailed description of the invention of a kind of HDMI signal receiver provided for this utility model embodiment above。In this embodiment, metal-oxide-semiconductor is PMOS。Additionally, as another specific embodiment of the present utility model, it is also possible to PMOS is replaced with NMOS tube, but, owing to NMOS tube is high potential conducting, so, now need to arrange a phase inverter between the 14th pin pin14 and described NMOS tube grid of the second HDMI。The detailed description of the invention of the electric power system based on HDMI formed based on the HDMI signal receiver of this this detailed description of the invention is referring to embodiment two。
Embodiment two
Fig. 2 is the structural representation of the electric power system based on HDMI that this utility model embodiment two provides。The structure based on the electric power system of HDMI that the electric power system based on HDMI that embodiment two provides provides with embodiment one is essentially identical, it is specially, embodiment two provide based in the electric power system of HDMI, the structure of the HDMI apparatus for transmitting signal 10 that it includes is identical with the structure of the HDMI apparatus for transmitting signal 10 that embodiment one provides, and the annexation between HDMI apparatus for transmitting signal 10 with HDMI signal receiver 30 is also identical with the annexation of embodiment one。Its difference, is only that the internal structure of HDMI signal receiver 30。
As in figure 2 it is shown, the HDMI signal receiver 30 that this utility model embodiment provides includes second HDMI the 31, second electric supply installation 32, NMOS tube 33 and the first resistance R1 and the second resistance R2 and the three resistance R3 being serially connected。Additionally, the HDMI signal receiver shown in Fig. 2 also includes the phase inverter 34 being arranged between the 14th pin pin14 and described NMOS tube 33 grid of described second HDMI 31。
It should be noted that, in this specific embodiment, second HDMI the 31, second electric supply installation 32 of HDMI signal receiver 30 and the first resistance R1 and the second resistance R2 and the three resistance R3 structure of being serially connected are identical with the structure of second HDMI the 21, second electric supply installation 22 of the HDMI signal receiver 20 shown in embodiment one and the first resistance R1 and the second resistance R2 being serially connected and the 3rd resistance R3。For the sake of brevity, it is not described in detail at this。
In HDMI signal receiver 30, the annexation of its each components and parts is as follows:
The input of described phase inverter 34 is connected with described 14th pin pin14nc2, and the outfan of described phase inverter 34 is connected with the grid of described NMOS tube 33；
The power input of described second electric supply installation 32 is connected with the drain electrode of described NMOS tube 33；
The grid of described NMOS tube 33 is connected with the source electrode of described NMOS tube 33 by described first resistance R1, and the outfan of described phase inverter 34 is connected with described first resistance R1；
The source electrode of described NMOS tube 33 is connected with the 18th pin pin18 of described second HDMI 31。
Owing to NMOS tube is high potential conducting, after phase inverter 34, when the current potential of the pin pin14nc2 in the second HDMI is 0, through phase inverter 34 anti-phase after, the current potential of phase inverter 34 outfan output is high potential, this high potential is input to the grid of NMOS tube, and the grid that current potential is high potential controls NMOS tube conducting。After NMOS tube conducting, the running voltage of the second electric supply installation 32 output arrives source electrode and then the 18th pin pin18vcc2 of arrival the second HDMI 31 through the drain electrode of NMOS tube, further up to the 18th pin pin18vcc1 of the first HDMI 11。
Thus realizing after the HDMI apparatus for transmitting signal 10 that this utility model embodiment provides connects with HDMI signal receiver 30, HDMI signal receiver 30 can be powered for HDMI apparatus for transmitting signal 10。
The detailed description of the invention of the electric power system based on HDMI provided for this utility model embodiment two above。
Additionally, in order to improve HDMI signal receiver and the stability of the equipment of transmission, above-described embodiment one or embodiment two provide based in the electric power system of HDMI, it is also possible to set up a microprocessor。Referring specifically to embodiment three。
Embodiment three
Fig. 3 is the electric power system structural representation based on HDMI that this utility model embodiment three provides。It should be noted that Fig. 3 be embodiment one provide based on the basis of the electric power system of HDMI on improve。Therefore, the electric power system structure based on HDMI that the electric power system structure based on HDMI shown in Fig. 3 provides with embodiment one is essentially identical, it the difference is that only, shown in Fig. 3 based in the electric power system structure of HDMI, can also include: be arranged on the microprocessor 41 between the 14th pin pin14 and the PMOS grid of the second HDMI, this microprocessor 41 is for detecting the current potential of the 14th pin pin14nc2 of described second HDMI, and the conducting of metal-oxide-semiconductor is whether according to the control of Electric potentials of the 14th pin pin14nc2 of described second HDMI。
HDMI signal receiver shown in Fig. 3 is by whether microprocessor 41 controls the conducting of metal-oxide-semiconductor, rather than the conducting of metal-oxide-semiconductor is directly controlled by the electric potential signal of the 14th pin pin14nc2, owing to whether the conducting of metal-oxide-semiconductor is related to whether HDMI signal receiver powers to HDMI apparatus for transmitting signal, so, by microprocessor 41, the HDMI signal receiver shown in Fig. 3 controls whether it powers to HDMI apparatus for transmitting signal。
Additionally, in the HDMI signal receiver shown in Fig. 3, even if the current potential that microprocessor 41 detects the 14th pin pin14nc2 of the second HDMI is 0, the running voltage that the second electric supply installation in practical situation according to HDMI signal receiver such as HDMI signal receiver provides is unstable, it can also control metal-oxide-semiconductor and be not turned on, and does not power to HDMI apparatus for transmitting signal thus controlling HDMI signal receiver。So, the microprocessor 41 by setting up can improve stability and the reliability of HDMI signal receiver and the equipment of transmission。
It should be noted that the HDMI signal receiver shown in Fig. 3 is to be additionally arranged a microprocessor 41 on the basis of the HDMI signal receiver shown in Fig. 1 to illustrate for example。In Fig. 3 except microprocessor, other each components and parts are identical with the structure of the components and parts in Fig. 1 and annexation, are not described in detail at this。
It practice, as another detailed description of the invention of the present utility model, it is also possible on the basis of the HDMI signal receiver shown in embodiment two, set up microprocessor。For the sake of brevity, it is not described in detail at this。
Additionally, in order to improve HDMI signal receiver further and send the stability of equipment and reliability, above-described embodiment three provide based in the electric power system of HDMI, it is also possible to set up a current detection circuit, to detect the electric current on its place branch road。Referring specifically to embodiment four。
Embodiment four
The electric power system based on HDMI that embodiment four provides be embodiment three provide based on the basis of the electric power system of HDMI on improve and obtain。The structure based on the electric power system of HDMI that the electric power system based on HDMI that embodiment four provides provides with embodiment three has many similarities, for the sake of brevity, its difference is only described by this utility model embodiment, and its similarity refers to the associated description of embodiment three。
Fig. 4 is the electric power system structural representation based on HDMI that this utility model embodiment four provides。As shown in Figure 4, the electric power system based on HDMI that this utility model embodiment four provides is except each structure including the electric power system based on HDMI described in embodiment three, it is also possible to including:
It is arranged on the current detection circuit 51 between the 18th pin pin18vcc2 and the drain electrode of described metal-oxide-semiconductor 23 of the second HDMI, described current detection circuit 51 is for detecting the current signal on its place branch road, and by described current signal transfer to described microprocessor 41；
Described microprocessor 41 is additionally operable to judge that whether described current signal is qualified, if it is, control metal-oxide-semiconductor conducting, if it does not, control metal-oxide-semiconductor cut-off。Specifically, arranging a predetermined current, microprocessor 41 judges that whether the current signal received is more than predetermined current (crossing stream), if not, illustrate that this current signal is qualified, control metal-oxide-semiconductor conducting, if, illustrate that this current signal is defective, control metal-oxide-semiconductor cut-off
Therefore, shown in Fig. 4 based in the electric power system of HDMI, whether metal-oxide-semiconductor turns on is not directly controlled by the electric potential signal of the 14th pin pin14, but by microprocessor control, wherein, whether microprocessor is when controlling metal-oxide-semiconductor and turning on, not only will according to the electric potential signal of the 14th pin pin14, and it is also contemplated that practical situation and the size of current of HDMI signal receiver, therefore, the electric power system based on HDMI shown in Fig. 4 can improve stability and the reliability of the electric power system based on HDMI further compared to the electric power system based on HDMI that embodiment three provides。
It it is more than preferred embodiment of the present utility model。It should be noted that those skilled in the art are without departing from the concept of the premise utility, any improvements and modifications that above-described embodiment is made, only at the row of protection domain of the present utility model。
Claims (7)
1. a HDMI apparatus for transmitting signal, it is characterised in that include the first HDMI, the 14th pin pin14 ground connection of described first HDMI。
2. HDMI apparatus for transmitting signal according to claim 1, it is characterized in that, also including: the first electric supply installation, diode and system power supply, the power input of described first electric supply installation is connected with the 18th pin pin18 of described first HDMI and described system power supply respectively by described diode；
The power input of described system power supply is connected with the 18th pin pin18 of described first HDMI。
3. a HDMI signal receiver, it is characterised in that include the second HDMI, the second electric supply installation, metal-oxide-semiconductor and the first resistance；
Wherein, when described metal-oxide-semiconductor is PMOS, the power input of described second electric supply installation is connected with the source electrode of described PMOS；The drain electrode of described PMOS is connected with the 18th pin pin18 of described second HDMI, and the grid of described metal-oxide-semiconductor is connected with the source electrode of described metal-oxide-semiconductor by described first resistance；The grid of described metal-oxide-semiconductor is connected with the 14th pin pin14 of described second HDMI；
When described metal-oxide-semiconductor is NMOS tube, described HDMI signal receiver also includes: be arranged on the phase inverter between the 14th pin pin14 and the described NMOS tube grid of described second HDMI；The input of described phase inverter is connected with described 14th pin pin14, and the outfan of described phase inverter is connected with the grid of described NMOS tube；
The power input of described second electric supply installation is connected with the drain electrode of described NMOS tube；
The grid of described NMOS tube is connected with the source electrode of described NMOS tube by described first resistance, and the outfan of described phase inverter is connected with described first resistance；
The source electrode of described NMOS tube is connected with the 18th pin pin18 of described second HDMI。
4. HDMI signal receiver according to claim 3, it is characterized in that, also include: the second resistance being serially connected and the 3rd resistance, one end of described second resistance is connected with the 18th pin pin18 of described second HDMI, the other end of described second resistance is connected with one end of described 3rd resistance, the other end ground connection of described 3rd resistance。
5. the HDMI signal receiver according to claim 3 or 4, it is characterized in that, described HDMI signal receiver also includes the microprocessor being arranged between the 14th pin pin14 and the described metal-oxide-semiconductor grid of described second HDMI, described microprocessor is for detecting the current potential of the 14th pin pin14 of described second HDMI, and the conducting of metal-oxide-semiconductor is whether according to the control of Electric potentials of the 14th pin pin14 of described second HDMI。
6. HDMI signal receiver according to claim 5, it is characterized in that, described HDMI signal receiver also includes the current detection circuit being arranged between the 18th pin pin18 and the drain electrode of described metal-oxide-semiconductor of described second HDMI, described current detection circuit is for detecting the current signal on its place branch road, and by described current signal transfer to described microprocessor；
Described microprocessor is additionally operable to judge that whether described current signal is qualified, if it is, control metal-oxide-semiconductor conducting, if it does not, control metal-oxide-semiconductor cut-off。
7. the electric power system based on HDMI, it is characterized in that, including: HDMI apparatus for transmitting signal and HDMI signal receiver, described HDMI apparatus for transmitting signal is the HDMI apparatus for transmitting signal described in claim 1 or 2, described HDMI signal receiver is the HDMI signal receiver described in any one of claim 3-6
Wherein, described first HDMI is connected by HDMI wire with described second HDMI。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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