CN204539302U - The system of the outside JA(junction ambient) of a kind of automatic identification HDMI - Google Patents
The system of the outside JA(junction ambient) of a kind of automatic identification HDMI Download PDFInfo
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- CN204539302U CN204539302U CN201520088659.7U CN201520088659U CN204539302U CN 204539302 U CN204539302 U CN 204539302U CN 201520088659 U CN201520088659 U CN 201520088659U CN 204539302 U CN204539302 U CN 204539302U
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Abstract
The utility model discloses the system of the outside JA(junction ambient) of a kind of automatic identification HDMI, comprise voltage low level testing circuit, voltage high-level detection, main control MCU, described main control MCU, according to the low and high level signal obtained, drives the signal mode of two-way TMDS signaling conversion circuit module controls HDMI port.System of the present utility model, can to HDMI Power supply pin voltage levels level detection, the level result that testing circuit is analyzed sends into MCU, output signal to drive circuit after analyzing judgement and transmit signals to two-way TMDS signaling conversion circuit module, control the signal mode state of two-way TMDS signaling conversion circuit module, thus determine it is signal output mode or signal input mode.Thus changing the direction of HDMI signal, such HDMI port can as being that signal input also can as being that signal exports.By automatically to change product self be as signal source output signal or automatically to change product self be role as signal receiver, ensure on same HDMI port, change Received signal strength or send signal and freely switch.
Description
Technical field
The utility model relates to high-definition data transmission communication electronics field, more precisely, relates to a kind of based on HDMI input and communication equipment or the system of applying and transmit high-definition data.
Background technology
In HDMI, have audio frequency and video output equipment and be called HD signal source (Source), the equipment receiving audio-video signal is called DH receiver (Sink).
Usual HDMI signal can only be fixing input by equipment transmission or export HD signal.The HD signalling arrangement at present with HDMI can only rely on the level signal detecting HPD (Hot plug hot plug) and judge whether connection receiving equipment.As long as there is high level signal will think Sink equipment, at once will transmit HDMI data-signal, this detection mode can to the unnecessary resource loss of signal resource.Also there is operation also not possess flexibility simultaneously.Such as there is the high definition player (HD Play) of HDMI, have signal input interface also to have signal output interface.Output interface is to provide HDMI data to Sink equipment, and input interface is that outside provides HDMI data to back up for internal data to HD Play.Need in the application select HDMI port to be input or export at connection other equipment corresponding, can not identify connect now be Source equipment or Sink equipment thus open or closing device idle component circuit, clearly can not point out the error of operator.
Utility model content
The utility model, in order to solve problems of the prior art, provides the system of the outside JA(junction ambient) of a kind of automatic identification HDMI.
In order to realize above-mentioned object, the technical solution of the utility model is: the system of the outside JA(junction ambient) of a kind of automatic identification HDMI, comprising:
Voltage low level testing circuit, for detecting the low level signal of HDMI port energization pins;
Voltage high-level detection, for detecting the high level signal of HDMI port energization pins;
And to be connected with voltage low level testing circuit, voltage high-level detection and to obtain the main control MCU of HDMI port energization pins low and high level signal, described main control MCU, according to the low and high level signal obtained, drives the signal mode of two-way TMDS signaling conversion circuit module controls HDMI port;
Described two-way TMDS signaling conversion circuit module comprises HDMI signaling interface A, HDMI signaling interface B, and drive singal inputs from HDMI signaling interface A, from the TMDS switch driving circuit A that HDMI signaling interface B exports, and drive singal inputs from HDMI signaling interface B, from the TMDS switch driving circuit B that HDMI signaling interface A exports.
Preferably, wherein, the pin of HDMI signaling interface A connects diode D7 negative electrode, and diode D7 anode and resistance R51 connect to form AND circuit; R51 is connected in TMDS switch driving circuit A provides " 0 " or level"1" to control the K2 delivery outlet with door switch; Diode D7 anode connects the pin delivery outlet of electric capacity C19 to HDMI signaling interface B;
The pin of HDMI signaling interface B connects diode D8 negative electrode, and D8 anode and resistance R43 connect to form AND circuit; R43 is connected in TMDS switch driving circuit B provides " 0 " or level"1" to control the K1 delivery outlet with door switch, and diode D8 anode connects the pin delivery outlet of electric capacity C11 to HDMI signaling interface A.
Preferably, described voltage high-level detection arranges as follows: one end of R10 is connected to 19 pins of HDMI, and the other end is connected 18 pins of HDMI jointly with the emitter of triode Q4, and its collector electrode connects 15 pins of main control MCU; What be connected with triode Q4 base stage has resistance R3 and resistance R8; Wherein resistance R3 is connected between triode Q4 base stage and power supply 5V power supply; Wherein resistance R8 is connected between triode Q4 base stage and power supply ground connection.
Preferably, voltage low level testing circuit arranges as follows: have resistance R7 to be connected between triode Q5 base stage and HDMI 18 pin; Contact resistance R6 between triode Q5 emitter and base stage; Triode Q5 emitter is also connected with power supply 6V power supply; Contact resistance R4 between triode Q5 collector electrode and triode Q6 base stage; Ground connection after triode Q5 collector electrode contact resistance R5; Triode Q6 grounded emitter; Contact resistance R1 between triode Q6 collector electrode and triode Q2 base stage; Triode Q2 emitter is connected with power supply 6V power supply; Triode Q2 collector electrode connects HDMI 18 pin; Contact resistance R2 between triode Q6 collector electrode and triode Q3 base stage; Triode Q3 emitter is connected with power supply 5V power supply; Ground connection after triode Q3 collector electrode contact resistance R9; Triode Q3 collector electrode is also connected to 13 pins of main control MCU.
Preferably, also comprise be connected with main control MCU for detecting the HDMI hot plug treatment circuit that HDMI port connects.
Preferably, described HDMI hot plug treatment circuit arranges as follows: resistance R10 connects between HDMI 18 pin and 19 pins, and diode D1 connects between 8 pins of HDMI 19 pin and main control MCU; Hot plug switching circuit triode Q19 emitter connects HDMI 19 pin, triode Q19 base stage contact resistance R41 to 8 pins of main control MCU, its grounded collector.
The system of the outside JA(junction ambient) of automatic identification HDMI of the present utility model, can to HDMI Power supply pin voltage levels level detection, the level result that testing circuit is analyzed sends into MCU, output signal to drive circuit after analyzing judgement by MCU and transmit signals to two-way TMDS signaling conversion circuit module, control the signal mode state of two-way TMDS signaling conversion circuit module, thus determine it is signal output mode or signal input mode.Thus changing the direction of HDMI signal, such HDMI port can as being that signal input also can as being that signal exports.By automatically to change product self be as signal source output signal or automatically to change product self be role as signal receiver, thus ensure on same HDMI port, change Received signal strength or send signal and freely switch.
Accompanying drawing explanation
Fig. 1 shows the block diagram of the utility model system.
Fig. 2 shows the circuit theory diagrams of the utility model system.
Fig. 3 shows the circuit theory diagrams of the utility model two-way TMDS signaling conversion circuit module.
Embodiment
The technical problem solved to make the utility model, the technical scheme of employing, the technique effect easy to understand obtained, below in conjunction with concrete accompanying drawing, be described further embodiment of the present utility model.
With reference to figure 1, the utility model provides the system of the outside JA(junction ambient) of a kind of automatic identification HDMI, and it comprises main control MCU, voltage low level testing circuit, voltage high-level detection, two-way TMDS signaling conversion circuit module etc.
Wherein, voltage low level testing circuit is for detecting the low level signal of HDMI port energization pins; And voltage high-level detection is for detecting the high level signal of HDMI port energization pins;
Voltage low level testing circuit, voltage high-level detection also connects respectively at main control MCU, main control MCU is used for receiver voltage low level detection circuit, the low and high level signal of the HDMI port energization pins that voltage high-level detection detects, and according to low and high level signal, drive the signal mode of two-way TMDS signaling conversion circuit module controls HDMI port, that is when external equipment is connected to HDMI port, main control MCU is according to the low and high level signal of HDMI port energization pins, thus control two-way TMDS signaling conversion circuit module and be in signal receiving modes or signal input mode.Product can be realized thus and automatically identify that the electronic equipment of external linkage is signal source equipment or signal receiver.
In the utility model, two-way TMDS signaling conversion circuit module is the module of a control DHMI port signal transport model, and this module is the agreement based on TMDS, can select structure known in those skilled in the art.
In the utility model specific embodiment, also comprise be connected with main control MCU for detecting the HDMI hot plug treatment circuit that HDMI port connects.Described HDMI hot plug treatment circuit arranges as follows: resistance R10 connects between HDMI 18 pin and 19 pins, and diode D1 connects between 8 pins of HDMI 19 pin and main control MCU; Detect be signal source time, main control MCU 8 pin heat outputtings plug signal codes pass to HDMI 19 pin through diode D1, provide hot plug voltage to signal source equipment.Hot plug switching circuit triode Q19 emitter connects HDMI 19 pin, triode Q19 base stage contact resistance R41 to 8 pins of main control MCU, its grounded collector.The double check communicated with miscellaneous equipment can be realized.
The detection of HDMI power-supplying circuit includes the triode Q4 emitter be connected with R10 and connects HDMI 18 pin, and collector electrode connects 15 pins of main control MCU; What be connected with triode Q4 base stage has resistance R3 and resistance R8; Wherein resistance R3 is connected between triode Q4 base stage and power supply 5V power supply; Wherein resistance R8 is connected between triode Q4 base stage and power supply ground connection.What triode Q4 base stage connected has resistance R3 and resistance R8, and these two resistance composition triode Q4 base stage sample circuits, ensure triode Q4 voltage and provide transistor base electric current.Triode Q4 emitter connects HDMI 18 pin.
When after the outside connection signal source device of HDMI 18 pin, if HDMI 18 pin voltage is higher than triode Q4 base stage sampling voltage, triode Q4 conducting, export high level from triode Q4 collector electrode and pass to 15 pins connecting main control MCU, after 15 pins of main control MCU receive high level, 8 pins of main control MCU change high level into by original low level, 8 pin high level hot connecting and disconnectings of main control MCU flow through pole pipe D1 and pass to HDMI 19 pin, the switching circuit of hot plug simultaneously triode Q19 emitter connects HDMI 19 pin, triode Q19 base stage contact resistance R41 is to 8 pins of main control MCU, triode Q19 grounded collector.Because of main control MCU from 8 pin heat outputtings plug high level signal electric currents to resistance R41 time, triode Q19 ends.By HDMI 19 pin, hot plug signal code is sent to the equipment of HDMI outside connection.
In the utility model, voltage low level testing circuit can identification signal receiving equipment (Sink): between described circuit current limiting resistance R7 connecting triode Q5 base stage and HDMI 18 pin; Triode Q5 emitter be connected upper offset resistance R6 between base stage; Triode Q5 emitter is also connected with power supply 6V power supply, when HDMI outside connect be signal receiver (Sink) time, HDMI 18 pin is low level, current-limiting resistance R7 has electric current to pass through, between triode Q5 emitter and base stage, voltage produces pressure reduction and is greater than 0.3V, triode Q5 collector electrode output current, electric current is from current-limiting resistance R4 to the triode Q6 base stage be connected with triode Q5 collector electrode; Triode Q6 conducting; Triode Q6 collector voltage is drop-down, between triode Q6 collector electrode and triode Q2 base stage, contact resistance R1 has electric current to pass through, triode Q2 collector electrode output voltage 5.2V, between triode Q6 collector electrode and triode Q3 base stage, contact resistance R2 has electric current to pass through simultaneously, triode Q3 collector electrode output voltage 4.2V is to 13 pins of main control MCU, 19 pin output signal voltages of main control MCU, there is provided the signal of telecommunication to triode Q7 base stage, because of contact resistance R13 between triode Q7 base stage and triode Q7 emitter with 19 pin contact resistance R14 of main control MCU; Triode Q7 grounded emitter; Resistance connects between power supply 5V and triode Q7 collector electrode; Triode Q1 base stage and the middle contact resistance R11 of triode Q7; Triode Q1 emitter connects power supply 5V voltage; So triode Q1 collector electrode output signal voltage is to the pin being connected two-way TMDS (differential signal) signaling conversion circuit module with it, the TMDS output signal of two-way TMDS (differential signal) signaling conversion circuit module respective channel, now HDMI is signal source output port.
Voltage low level testing circuit can identification signal source device (Source): when after the outside connection signal source device of HDMI 18 pin, if HDMI 18 pin voltage is higher than triode Q4 base stage sampling voltage, triode Q4 conducting, export high level from triode Q4 collector electrode and pass to 15 pins connecting main control MCU, after 15 pins of main control MCU receive high level, 8 pins of main control MCU change high level into by original low level, 19 pins of main control MCU change low level 0V into by original high level simultaneously, the signal of telecommunication is provided to be 0V to triode Q7 base stage with 19 pin contact resistance R14 of main control MCU, because of contact resistance R13 between triode Q7 base stage and triode Q7 emitter, triode Q7 grounded emitter, resistance connects between power supply 5V and triode Q7 collector electrode, triode Q1 base stage and the middle contact resistance R11 of triode Q7, triode Q1 emitter connects power supply 5V voltage, so triode Q1 collector electrode does not have output signal voltage to arrive the pin being connected two-way TMDS (differential signal) signaling conversion circuit module with it, the TMDS of two-way TMDS (differential signal) signaling conversion circuit module respective channel is converted to Received signal strength, and now HDMI is receiver port.
In the utility model, described main control MCU controls two-way TMDS signaling conversion circuit module by signal switching drive circuit.Described signal switching drive circuit arranges as follows: the base stage of 19 pin contact resistance R14 to triode Q7 of main control MCU; Contact resistance R13 between the base stage of triode Q7 and triode Q7 emitter; Triode Q7 grounded emitter; Resistance R12 connects between power supply 5V power supply and triode Q7 collector electrode; Triode Q1 base stage and the middle contact resistance R11 of triode Q7 collector electrode; Triode Q1 emitter connects power supply 5V power supply; Triode Q1 collector electrode connects the pin of two-way TMDS signaling conversion circuit module.
Two-way TMDS signaling conversion circuit module of the present utility model, comprise main control MCU, and HDMI signaling interface A, HDMI signaling interface B, and TMDS signal inputs from HDMI signaling interface A, from the TMDS switch driving circuit A that HDMI signaling interface B exports, and TMDS signal inputs from HDMI signaling interface B, from the TMDS switch driving circuit B that HDMI signaling interface A exports.
Main control MCU can detect HDMI signaling interface A or detect pin 18 signal voltage of HDMI signaling interface B input, judgement is input signal pattern or output mode signal, then export control signal to TMDS signal switching drive circuit from S1 or S2, the change-over circuit being outputed signal control TMDS transmitted in both directions by TMDS switch driving circuit is transformed into sense the pattern wanted.
Particularly, input from HDMI signaling interface A with reference to figure 3, TMDS, be transferred to HDMI signaling interface B and export, configure as follows:
A. in described circuit, the pin 1 of HDMI signaling interface A connects D7 negative electrode, and D7 anode and resistance R51 connect to form AND circuit.R51 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data2+ " signal of TMDS, " Data2+ " signal is transferred to pin 1 delivery outlet of HDMI signaling interface B, with reference to figure 3 by the electric capacity C19 be connected with D7 anode.
B. in described circuit, the pin 3 of HDMI signaling interface A connects D9 negative electrode, and D9 anode and resistance R52 connect to form AND circuit.R52 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data2-" signal of TMDS, " Data2-" signal is transferred to pin 3 delivery outlet of HDMI signaling interface B by the electric capacity C20 be connected with D9 anode.Signal passes through the TMDS signal differential of the above HDMI signaling interface A transmission to (Data2+; Data2-/hereinafter referred to as A mono-group) be transferred to the negative electrode of A mono-group of TMDS to D7, D9, with reference to figure 3.
C. in described circuit, the pin 4 of HDMI signaling interface A connects D11 negative electrode, and D11 anode and resistance R53 connect to form AND circuit.R53 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data1+ " signal of TMDS, " Data1+ " signal is transferred to pin 4 delivery outlet of HDMI signaling interface B, with reference to figure 3 by the electric capacity C21 be connected with D11 anode.
D. in described circuit, the pin 6 of HDMI signaling interface A connects D13 negative electrode, and D13 anode and resistance R54 connect to form AND circuit.R54 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data1-" signal of TMDS, " Data1-" signal is transferred to pin 6 delivery outlet of HDMI signaling interface B, with reference to figure 3 by the electric capacity C22 be connected with D13 anode.Signal passes through the TMDS signal differential of the above HDMI signaling interface A transmission to (Data1+; Data1-/hereinafter referred to as A bis-groups) be transferred to the negative electrode of A bis-groups of TMDS to D11, D13.
E. in described circuit, the pin 7 of HDMI signaling interface A connects D15 negative electrode, and D15 anode and resistance R55 connect to form AND circuit.R55 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data0+ " signal of TMDS, " Data0+ " signal is transferred to pin 7 delivery outlet of HDMI signaling interface B, with reference to figure 3 by the electric capacity C23 be connected with D15 anode.
F. in described circuit, the pin 9 of HDMI signaling interface A connects D17 negative electrode, and D17 anode and resistance R56 connect to form AND circuit.R56 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data0-" signal of TMDS, " Data0-" signal is transferred to pin 9 delivery outlet of HDMI signaling interface B, with reference to figure 3 by the electric capacity C24 be connected with D17 anode.Signal passes through the TMDS signal differential of the above HDMI signaling interface A transmission to (Data0+; Data0-/hereinafter referred to as A tri-groups) be transferred to the negative electrode of A tri-groups of TMDS to D15, D17.
G. in described circuit, the pin 10 of HDMI signaling interface A connects D19 negative electrode, and D19 anode and resistance R57 connect to form AND circuit.R57 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data Cock+ " signal of TMDS, " Data Cock+ " signal is transferred to pin 10 delivery outlet of HDMI signaling interface B, with reference to figure 3 by the electric capacity C25 be connected with D19 anode.
H. in described circuit, the pin 12 of HDMI signaling interface A connects D21 negative electrode, and D21 anode and resistance R58 connect to form AND circuit.R58 is connected to the K2 delivery outlet of TMDS switch driving circuit A, K2 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data Cock-" signal of TMDS, " Data Cock-" signal is transferred to pin 12 delivery outlet of HDMI signaling interface B, with reference to figure 3 by the electric capacity C26 be connected with D21 anode.Signal passes through the TMDS signal differential of the above HDMI signaling interface A transmission to (Data Cock+; Data Cock-/hereinafter referred to as A tetra-groups) be transferred to the negative electrode of A tetra-groups of TMDS to D19, D21.
TMDS inputs from HDMI signaling interface B, is transferred to HDMI signaling interface A and exports, configuration following (with reference to figure 3):
A. in described circuit, the pin 1 of HDMI signaling interface B connects D8 negative electrode, and D8 anode and resistance R43 connect to form AND circuit.R43 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data2+ " signal of TMDS, " Data2+ " signal is transferred to pin 1 delivery outlet of HDMI signaling interface A by the electric capacity C11 be connected with D8 anode.
B. in described circuit, the pin 3 of HDMI signaling interface B connects D10 negative electrode, and D10 anode and resistance R44 connect to form AND circuit.R44 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data2-" signal of TMDS, " Data2-" signal is transferred to pin 3 delivery outlet of HDMI signaling interface A by the electric capacity C12 be connected with D10 anode.
Signal passes through the TMDS signal differential of the above HDMI signaling interface B transmission to (Data2+; Data2-/hereinafter referred to as B mono-group) be transferred to the negative electrode of B mono-group of TMDS to D8, D10.
C. in described circuit, the pin 4 of HDMI signaling interface B connects D12 negative electrode, and D12 anode and resistance R45 connect to form AND circuit.R45 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data1+ " signal of TMDS, " Data1+ " signal is transferred to pin 4 delivery outlet of HDMI signaling interface A by the electric capacity C13 be connected with D12 anode.
D. in described circuit, the pin 6 of HDMI signaling interface B connects D14 negative electrode, and D14 anode and resistance R46 connect to form AND circuit.R46 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data1-" signal of TMDS, " Data1-" signal is transferred to pin 6 delivery outlet of HDMI signaling interface A by the electric capacity C14 be connected with D14 anode.
Signal passes through the TMDS signal differential of the above HDMI signaling interface B transmission to (Data1+; Data1-/hereinafter referred to as B bis-groups) be transferred to the negative electrode of B bis-groups of TMDS to D12, D14.
E. in described circuit, the pin 7 of HDMI signaling interface B connects D16 negative electrode, and D16 anode and resistance R47 connect to form AND circuit.R47 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data0+ " signal of TMDS, " Data0+ " signal is transferred to pin 7 delivery outlet of HDMI signaling interface A by the electric capacity C15 be connected with D16 anode.
F. in described circuit, the pin 9 of HDMI signaling interface B connects D18 negative electrode, and D18 anode and resistance R48 connect to form AND circuit.R48 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data0-" signal of TMDS, " Data0-" signal is transferred to pin 9 delivery outlet of HDMI signaling interface A by the electric capacity C16 be connected with D18 anode.
Signal passes through the TMDS signal differential of the above HDMI signaling interface B transmission to (Data0+; Data0-/hereinafter referred to as B tri-groups) be transferred to the negative electrode of B tri-groups of TMDS to D16, D18.
G. in described circuit, the pin 10 of HDMI signaling interface B connects D20 negative electrode, and D20 anode and resistance R49 connect to form AND circuit.R49 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data Cock+ " signal of TMDS, " Data Cock+ " signal is transferred to pin 10 delivery outlet of HDMI signaling interface A by the electric capacity C17 be connected with D20 anode.
H. in described circuit, the pin 12 of HDMI signaling interface B connects D22 negative electrode, and D22 anode and resistance R50 connect to form AND circuit.R50 is connected to the K1 delivery outlet of TMDS switch driving circuit B, K1 delivery outlet can provide " 0 " or level"1" to control the switch with door, thus open or close " Data Cock-" signal of TMDS, " Data Cock-" signal is transferred to pin 12 delivery outlet of HDMI signaling interface A by the electric capacity C18 be connected with D22 anode.
Signal passes through the TMDS signal differential of the above HDMI signaling interface B transmission to (DataCock+; Data Cock-/hereinafter referred to as B tetra-groups) be transferred to the negative electrode of B tetra-groups of TMDS to D20, D22.
The system of the outside JA(junction ambient) of automatic identification HDMI of the present utility model, can to HDMI Power supply pin voltage levels level detection, the level result that testing circuit is analyzed sends into MCU, output signal to drive circuit after analyzing judgement by MCU and transmit signals to two-way TMDS signaling conversion circuit module, control the signal mode state of two-way TMDS signaling conversion circuit module, thus determine it is signal output mode or signal input mode.Thus changing the direction of HDMI signal, such HDMI port can as being that signal input also can as being that signal exports.By automatically to change product self be as signal source output signal or automatically to change product self be role as signal receiver, thus ensure on same HDMI port, change Received signal strength or send signal and freely switch.
The disclosed system automatically identifying the outside JA(junction ambient) of HDMI of the utility model, may be used for all digital electronic goods with HDMI high-definition interface now, such as high definition DVD (comprising HDMI high definition 3D blue-ray DVD, HDMI ultra high-definition 4K DVD etc.); High resolution audio and video digital product as, digital camera, panel computer, desktop computer, DV etc.; Home appliance as, high definition display device (comprising ultra high-definition) television set, projector, computer monitor etc.; Outdoor display device is as, outdoor high-definition advertisement screen etc.; Engineering project as, subway display system, the display of building high definition and supervisory control system, conference system, family's display system etc.
The utility model is by preferred embodiment having carried out detailed explanation.But, by studying carefully above, concerning the change of each execution mode with to increase be apparent for one of ordinary skill in the art.Being intended that these changes all and increasing of applicant has all dropped in scope that the utility model claim protects.
Claims (6)
1. automatically identify a system for the outside JA(junction ambient) of HDMI, it is characterized in that, comprising:
Voltage low level testing circuit, for detecting the low level signal of HDMI port energization pins;
Voltage high-level detection, for detecting the high level signal of HDMI port energization pins;
And to be connected with voltage low level testing circuit, voltage high-level detection and to obtain the main control MCU of HDMI port energization pins low and high level signal, described main control MCU, according to the low and high level signal obtained, drives the signal mode of two-way TMDS signaling conversion circuit module controls HDMI port;
Described two-way TMDS signaling conversion circuit module comprises HDMI signaling interface A, HDMI signaling interface B, and drive singal inputs from HDMI signaling interface A, from the TMDS switch driving circuit A that HDMI signaling interface B exports, and drive singal inputs from HDMI signaling interface B, from the TMDS switch driving circuit B that HDMI signaling interface A exports.
2. system according to claim 1, is characterized in that: wherein, and the pin of HDMI signaling interface A connects diode D7 negative electrode, and diode D7 anode and resistance R51 connect to form AND circuit; R51 is connected in TMDS switch driving circuit A provides " 0 " or level"1" to control the K2 delivery outlet with door switch; Diode D7 anode connects the pin delivery outlet of electric capacity C19 to HDMI signaling interface B;
The pin of HDMI signaling interface B connects diode D8 negative electrode, and D8 anode and resistance R43 connect to form AND circuit; R43 is connected in TMDS switch driving circuit B provides " 0 " or level"1" to control the K1 delivery outlet with door switch, and diode D8 anode connects the pin delivery outlet of electric capacity C11 to HDMI signaling interface A.
3. system according to claim 1, it is characterized in that: described voltage high-level detection arranges as follows: one end of R10 is connected to 19 pins of HDMI, the other end is connected 18 pins of HDMI jointly with the emitter of triode Q4, and its collector electrode connects 15 pins of main control MCU; What be connected with triode Q4 base stage has resistance R3 and resistance R8; Wherein resistance R3 is connected between triode Q4 base stage and power supply 5V power supply; Wherein resistance R8 is connected between triode Q4 base stage and power supply ground connection.
4. system according to claim 1, is characterized in that: voltage low level testing circuit arranges as follows: have resistance R7 to be connected between triode Q5 base stage and HDMI 18 pin; Contact resistance R6 between triode Q5 emitter and base stage; Triode Q5 emitter is also connected with power supply 6V power supply; Contact resistance R4 between triode Q5 collector electrode and triode Q6 base stage; Ground connection after triode Q5 collector electrode contact resistance R5; Triode Q6 grounded emitter; Contact resistance R1 between triode Q6 collector electrode and triode Q2 base stage; Triode Q2 emitter is connected with power supply 6V power supply; Triode Q2 collector electrode connects HDMI 18 pin; Contact resistance R2 between triode Q6 collector electrode and triode Q3 base stage; Triode Q3 emitter is connected with power supply 5V power supply; Ground connection after triode Q3 collector electrode contact resistance R9; Triode Q3 collector electrode is also connected to 13 pins of main control MCU.
5. system according to claim 1, is characterized in that: also comprise be connected with main control MCU for detecting the HDMI hot plug treatment circuit that HDMI port connects.
6. system according to claim 5, is characterized in that: described HDMI hot plug treatment circuit arranges as follows: resistance R10 connects between HDMI 18 pin and 19 pins, and diode D1 connects between 8 pins of HDMI 19 pin and main control MCU; Hot plug switching circuit triode Q19 emitter connects HDMI 19 pin, triode Q19 base stage contact resistance R41 to 8 pins of main control MCU, its grounded collector.
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| CN201520088659.7U CN204539302U (en) | 2015-02-09 | 2015-02-09 | The system of the outside JA(junction ambient) of a kind of automatic identification HDMI |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111818287A (en) * | 2020-07-03 | 2020-10-23 | 深圳市炬力北方微电子有限公司 | Wireless video and audio transmitter and wireless video and audio transmission method |
| CN114329513A (en) * | 2021-11-29 | 2022-04-12 | 苏州浪潮智能科技有限公司 | Device, method and server for limiting external access of physical interface |
| US20220303497A1 (en) * | 2021-03-19 | 2022-09-22 | ShenZhen Hongfei Precision Technology Co.,Ltd. | Electronic device and signal processing method |
-
2015
- 2015-02-09 CN CN201520088659.7U patent/CN204539302U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111818287A (en) * | 2020-07-03 | 2020-10-23 | 深圳市炬力北方微电子有限公司 | Wireless video and audio transmitter and wireless video and audio transmission method |
| US20220303497A1 (en) * | 2021-03-19 | 2022-09-22 | ShenZhen Hongfei Precision Technology Co.,Ltd. | Electronic device and signal processing method |
| CN114329513A (en) * | 2021-11-29 | 2022-04-12 | 苏州浪潮智能科技有限公司 | Device, method and server for limiting external access of physical interface |
| CN114329513B (en) * | 2021-11-29 | 2023-11-03 | 苏州浪潮智能科技有限公司 | Device, method and server for limiting external access of physical interface |
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