CN106713795A - TV stick power supply method and apparatus - Google Patents
TV stick power supply method and apparatus Download PDFInfo
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- CN106713795A CN106713795A CN201611186032.0A CN201611186032A CN106713795A CN 106713795 A CN106713795 A CN 106713795A CN 201611186032 A CN201611186032 A CN 201611186032A CN 106713795 A CN106713795 A CN 106713795A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
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Abstract
The invention discloses a TV stick power supply method. The TV stick power supply method is applied to a TV set and a TV stick, the TV set comprises an HDMI interface, a main chip, and an input detection circuit and a power supply module in circuit connection with the HDMI interface, and an RCL circuit is preset in the TV stick; the TV stick power supply method comprises the following steps: when it is detected that the HDMI interface is connected with an external terminal device, the main chip sends a detection signal to the terminal device based on the input detection circuit, and if a feedback signal fed back by the terminal device according to the detection signal is received, the main chip judges the terminal device as the TV stick and drives the power supply module to supply power to the terminal device. The invention further discloses a TV stick power supply apparatus. According to the TV stick power supply method disclosed by the invention, as the input detection circuit and the RCL circuit are added, the existing HDMI interface standard is compatible, the TV stick does not need to be connected with an external USB power line, thus the circuit is simple, and the power supply is convenient.
Description
Technical field
The present invention relates to technical field of television sets, more particularly to television rod method of supplying power to and device.
Background technology
As intelligent electrical apparatus develop, because existing common TV does not have operating system, so as to introduce one kind carry
The television rod of HDMI, television rod carries Android operation system and is connected to become television set external connection equipment by HDMI, will
General television set becomes dual system, so as to realize the iteratively faster of system for TV set.
Television rod is different from USB flash disk, and television rod operationally needs to consume electricity, television rod is powered using different sides
Formula；Existing television rod overwhelming majority needs individually connect upper USB power source line connection power supply, and not only user uses not this method
It is convenient, and television rod individually connects the more socket of upper USB power source needs, causes complex circuit to bother；It is another to have small part electricity
Directly powered using HDMI depending on rod ,+5V voltages be directly circulated on power amplifying device by the 14th pin of HDMI,
Due to existing HDMI standard, it may appear that user's maloperation in the case of ignorant or maloperation is powered to other and is not required to
In the equipment to be powered, the problems such as cause equipment to burn out.
The above is only used for auxiliary and understands technical scheme, does not represent and recognizes that the above is existing skill
Art.
The content of the invention
It is a primary object of the present invention to provide a kind of television rod method of supplying power to, it is intended to realize more easily as television rod is supplied
Electricity.
To achieve the above object, the present embodiment provides a kind of television rod method of supplying power to, it is characterised in that the television rod is supplied
Method for electrically is applied to television set and television rod, and the television set includes HDMI, master chip and connects with HDMI circuit
The input detecting circuit and power module for connecing, the default RCL circuits of the television rod, the television rod method of supplying power to：
When HDMI external devices are detected, master chip is based on input detecting circuit and sends inspection to terminal device
Survey signal；
If receive the feedback signal that terminal device feeds back according to detection signal, master chip judges that terminal device is TV
Driving power module is powered to terminal device after rod.
Alternatively, the input detecting circuit includes triode Q1, direct current tandem circuit, the exchange inspection of mutual circuit communication
Slowdown monitoring circuit and test side GPIO2, test side GPIO2 are connected with triode Q1 emitter circuits, AC detection circuit and direct current base
Plinth circuit communication is connected with triode Q1 base circuits,
It is described when HDMI external devices are detected, master chip be based on input detecting circuit to terminal device send out
Sending detection signal includes：
When HDMI external devices are detected, master chip is based on base stage of the AC detection circuit to triode Q1
AC signal is sent with terminal device, direct current signal is sent to the base stage of triode Q1 based on direct current tandem circuit.
Alternatively, if described when receiving the feedback signal that terminal device feeds back according to detection signal, master chip judges eventually
End equipment be television rod after driving power module to terminal device be powered including：
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, and obtain feedback signal, AC signal
With the total signal strength of direct current signal；
Whether master chip judges total signal strength more than preset signal strength, if total signal strength is strong more than preset signals
Degree, driving power module is powered to terminal device after master chip judges terminal device as television rod.
Alternatively, the test side GPIO2 is connected with master chip, and the direct current tandem circuit includes power vd D, the first electricity
Resistance R1, second resistance R2, the 4th resistance R4, the first electric capacity C1 and the 3rd electric capacity C3, power vd D one end and first resistor R1, the
Two resistance R2 and first electric capacity C1 one end connect；The first resistor R1 other ends and triode Q1 base stages, the 4th resistance R4 and the 3rd
One end connection of electric capacity C3；The other end of the first electric capacity C1 is connected with test side GPIO2, triode Q1 base electrodes, second resistance
The other end of R2 is connected with triode Q1 base electrodes, and the emitter stage of triode Q1 is grounded after being connected with the 4th resistance R4 other ends
End；
The AC detection circuit includes：Second electric capacity C2,3rd resistor R3, the 4th electric capacity C4 and input GPIO1, it is defeated
Enter to hold GPIO1 to be connected with 3rd resistor R3 one end, the one of the other end of 3rd resistor R3 and the second electric capacity C2 and the 4th electric capacity C4
End connection, the other end earth terminal of the 4th electric capacity C4, the second electric capacity C2 other ends are connected with the 3rd electric capacity C3 with HDMI；
The master chip is based on the step of input detecting circuit sends detection signal to terminal device to be included：
Master chip is based on direct current signals of the power vd D to input detecting circuit input voltage value V1, and direct current signal is by the
One resistance R1 sends direct current signal to the base stage of triode Q1；
Master chip is based on input GPIO1 and is input into PWM to input detecting circuit, by the second electric capacity C2 and the 4th electric capacity C4
Modulation filtering, obtains the triangular wave of pre-set peak value V2, and using by the triangular wave of the 3rd electric capacity C3 as AC signal, and by three
Angle ripple is sent to terminal device as detection signal；
The feedback signal that the receiving terminal apparatus are obtained according to AC signal, and obtain feedback signal, AC signal and
The step of total signal strength of direct current signal, includes：
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, it is main if feedback signal is to amplify signal
Chip will amplify the peak value of signal as V3, calculate the total signal strength of feedback signal, AC signal and direct current signal.
Alternatively, the default RCL circuits of the television rod, RCL circuits include the 5th electric capacity C5, the first inductance L1 and the 5th electricity
Resistance R5, the 5th resistance R5 one end is connected with first inductance L1 one end and HDMI in the RCL circuits, and the first inductance L1 is another
End be connected with the 5th electric capacity C5 one end, the 5th electric capacity C5 other ends be connected with the 5th resistance R5 other ends after earth terminal,
The feedback signal that the master chip receiving terminal apparatus are obtained according to AC signal, if feedback signal is believed to amplify
Number, master chip will amplify the peak value of signal as V3, calculate the total signal strength of feedback signal, AC signal and direct current signal
Step includes：
The AC signal that master chip will send according to AC detection circuit to terminal device, it is anti-that master chip obtains terminal device
Feedback signal, if terminal device is television rod, terminal device is based on the triangular wave of the default RCL circuit presets peak values V2 of television rod
Waveform is converted to the sine wave of pre-set peak value V3, the feedback signal of signal type is amplified to be formed.
To realize the method in the present invention, the present embodiment correspondence improves television set, and the television set can be with television rod electricity
Road connects, and the television set includes HDMI, master chip and the input detecting circuit and electricity that are connected with HDMI circuit
Source module, the default RCL circuits of the television rod, the master chip includes：
Detection identification module, for when HDMI external devices are detected, based on input detecting circuit to end
End equipment sends detection signal；
Conversion power supply module, if for receiving during feedback signal that terminal device feed back according to detection signal, judging end
End equipment be television rod after driving power module be powered to terminal device.
Alternatively, the input detecting circuit includes triode Q1, direct current tandem circuit, the exchange inspection of mutual circuit communication
Slowdown monitoring circuit and test side GPIO2, test side GPIO2 are connected with triode Q1 emitter circuits, AC detection circuit and direct current base
Plinth circuit communication is connected with triode Q1 base circuits, and the detection identification module includes：
Signal transmitting unit, for when HDMI external devices are detected, based on AC detection circuit to three
The base stage and terminal device of pole pipe Q1 send AC signal, and sending direct current to the base stage of triode Q1 based on direct current tandem circuit believes
Number.
Alternatively, the conversion power supply module includes：
Signal element is obtained, for the feedback signal that receiving terminal apparatus are obtained according to AC signal, and feedback letter is obtained
Number, the total signal strength of AC signal and direct current signal；
Compare power supply unit, for whether judging total signal strength more than preset signal strength, if total signal strength is more than
Preset signal strength, driving power module is powered to terminal device after master chip judges terminal device as television rod.
Alternatively, the test side GPIO2 is connected with master chip, and the direct current tandem circuit includes power vd D, the first electricity
Resistance R1, second resistance R2, the 4th resistance R4, the first electric capacity C1 and the 3rd electric capacity C3, power vd D one end and first resistor R1, the
Two resistance R2 and first electric capacity C1 one end connect；The first resistor R1 other ends and triode Q1 base stages, the 4th resistance R4 and the 3rd
One end connection of electric capacity C3；The other end of the first electric capacity C1 is connected with test side GPIO2, triode Q1 base electrodes, second resistance
The other end of R2 is connected with triode Q1 base electrodes, and the emitter stage of triode Q1 is grounded after being connected with the 4th resistance R4 other ends
End；
The AC detection circuit includes：Second electric capacity C2,3rd resistor R3, the 4th electric capacity C4 and input GPIO1, it is defeated
Enter to hold GPIO1 to be connected with 3rd resistor R3 one end, the one of the other end of 3rd resistor R3 and the second electric capacity C2 and the 4th electric capacity C4
End connection, the other end earth terminal of the 4th electric capacity C4, the second electric capacity C2 other ends are connected with the 3rd electric capacity C3 with HDMI；
The detection identification module also includes：
Direct current signal unit, for based on direct current signal from power vd D to input detecting circuit input voltage value V1, direct current
Signal sends direct current signal by first resistor R1 to the base stage of triode Q1；
AC signal unit, for being input into PWM to input detecting circuit based on input GPIO1, by the second electric capacity C2
Modulated with the 4th electric capacity C4 and filtered, obtain the triangular wave of pre-set peak value V2, and using by the triangular wave of the 3rd electric capacity C3 as friendship
Stream signal, and sent triangular wave as detection signal to terminal device；
The acquisition signal element, is additionally operable to：
The feedback signal that receiving terminal apparatus are obtained according to AC signal, if feedback signal is to amplify signal, believes amplifying
Number peak value as V3, calculate the total signal strength of feedback signal, AC signal and direct current signal.
Alternatively, the default RCL circuits of the television rod, RCL circuits include the 5th electric capacity C5, the first inductance L1 and the 5th electricity
Resistance R5, the 5th resistance R5 one end is connected with first inductance L1 one end and HDMI in the RCL circuits, and the first inductance L1 is another
End be connected with the 5th electric capacity C5 one end, the 5th electric capacity C5 other ends be connected with the 5th resistance R5 other ends after earth terminal,
The acquisition signal element, is additionally operable to
In the feedback signal that receiving terminal apparatus are obtained according to AC signal, if feedback signal will amplify to amplify signal
The peak value of signal, according to the AC signal that AC detection circuit will send to terminal device, obtains terminal device feedback as V3
Signal, if terminal device is television rod, the triangular wave that terminal device is based on the default RCL circuit presets peak values V2 of television rod will
Waveform is converted to the sine wave of pre-set peak value V3, and the feedback signal of signal type is amplified to be formed.
Television rod method of supplying power to of the present invention and device, using television set input detecting circuit, master chip, power module and electricity
Television rod is powered depending on rod preinstalled circuit；When HDMI external devices are detected, master chip is based on input detection electricity
Road direction terminal device sends detection signal；If receive the feedback signal that terminal device feeds back according to detection signal, master chip
Driving power module is powered to terminal device after judging terminal device as television rod；End is detected in television set HDMI
When end equipment is connected, input detecting circuit is identified to terminal device, and access device is determined based on the default RCL circuits of television rod
To be powered to television rod after television rod, HDMI is utilized on the premise of existing HDMI standard is not influenceed, more
Accurately easily for television rod is powered.
Brief description of the drawings
Fig. 1 is HDMI schematic diagram in television rod method of supplying power to of the present invention；
Fig. 2 is television rod method of supplying power to structural representation of the present invention；
Fig. 3 is the input detecting circuit schematic diagram that television rod method of supplying power to of the present invention is related to；
Fig. 4 is the television rod RCL realization principle figures that television rod method of supplying power to of the present invention is related to；
Fig. 5 is the schematic flow sheet of television rod method of supplying power to first embodiment of the present invention；
Fig. 6 is the refined flow chart of step S20 in Fig. 5；
Fig. 7 is the high-level schematic functional block diagram of television rod electric supply installation first embodiment of the present invention；
Fig. 8 is the refinement high-level schematic functional block diagram of detection identification module in Fig. 7；
Fig. 9 is the refinement high-level schematic functional block diagram of conversion power supply module in Fig. 7.
The realization of the object of the invention, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that specific embodiment described herein is only used to explain the present invention, it is not intended to limit the present invention.
(i.e. HDMI is English for HDMI of the present invention：High Definition Multimedia
Interface), abbreviation HDMI is a kind of digitized video/COBBAIF technology, is the tailored version digitlization for being adapted to image transmission
Interface, it can simultaneously transmit audio and video frequency signal；As shown in figure 1, it is HDMI standard A type interfaces that socket is used in the present invention
100 include 19 pins, wherein the 18th pin 101, the 5V power supplys in VCC (supply voltage) connection TV internal power supply modules,
And connect the power inlet on television rod pcb board, the 19th pin 102, the input in HPD (hot plug detection) connection television sets
Detection circuit, while the 19th pin 102 can external devices (i.e. terminal device be television rod when, television rod can be electrically connected
Internal processor and default RCL circuits), HDMI and joint connection are adapted to, pin one-to-one corresponding (if it should be noted that
The method of supplying power to being related in the present invention uses the HDMI of other models, or the present invention is connected into HDMI standard A
On type interface other pins, in the scope of protection of the invention).
Television rod method of supplying power to of the present invention is mainly used in television set and television rod, as shown in Fig. 2 television rod 200 is main
Including the default RCL circuits 201 of television rod, television set 300 mainly includes that power module 301 is used to determine that access terminal equipment is electricity
During depending on rod 200,5V power supplys are provided television rod 200, master chip 302 is used to connect input detecting circuit 303 and power module
301, while performing platform as information exchange operation；Input detecting circuit 303 is as shown in figure 3, for recognizing that access terminal sets
It is standby；Fig. 4 show the default RCL circuits 201 of television rod, and being accessed input detecting circuit can realize that triangle waveform is transformed into
Sine wave；As shown in figure 1, wherein the 18th pin 101VCC (supply voltage) connection TV internal power supply modules, the 19th pin
102, HPD (hot plug detections) connect the input detecting circuit of television set.
The television rod method of supplying power to is applied to television set and television rod, and the television set includes HDMI, master chip
And the input detecting circuit and power module being connected with HDMI circuit, the default RCL circuits of the television rod, reference picture 5,
Comprised the following steps in the embodiment of television rod method of supplying power to one：
Step S10, when HDMI external devices are detected, master chip is set based on input detecting circuit to terminal
Preparation send detection signal；
At television set HDMI external devices (such as DVD, television rod), input detecting circuit is connect by HDMI
Mouth sends detection signal (detection signal to external devices：Circuit communication form according to input detecting circuit forms spy
Determine the alternating current of frequency waveform), the detection signal that external devices can send according to input detecting circuit forms correspondence feedback
Signal, is sent to input detecting circuit；As shown in figure 3, input detecting circuit is connected with the pin that HDMI is specified, existing
HDMI1.4 standards issue after, the HDMI function of television set is defined, and the 18th pin and the 19th pin in this programme exist
After connection input detecting circuit influence will not be produced on the function of existing each pin.
Step S20, if receive the feedback signal that terminal device feeds back according to detection signal, master chip judges that terminal sets
It is standby for after television rod driving power module be powered to terminal device.
The detection signal that external devices send according to input detecting circuit forms feedback signal, and master chip is according to input
The detection feedback signal that receives of circuit, confirms that terminal device is that driving power module is supplied to terminal device after television rod
Electricity；Corresponding external devices identification decision is using the 19th pin of HDMI, the existing pin of HDMI the 19th
Function is defined as HPD (hot plug detection), and the 19th pin is used to recognize external equipment, complies fully with HDMI standard, TV
Machine realizes automatic detection identification television rod, and the 18th pin VCC pin by HDMI is powered to it, i.e. the power supply of television set
Module adds 5V power supplys to the 18th pin VCC of HDMI, and television rod is powered；(e.g., when the 19th pin of HDMI
HPD carry out hot plug detect insertion terminal device be DVD or other can HDMI input equipments when, the 19th pin connection television set
Interior input detecting circuit, can judge that the terminal device is not television rod, thus the 18th pin of television set connects power supply mould
Block will not be to the power terminal equipment, and HDMI television sets while other-end equipment normal work is ensured realize automatic inspection
Identification television rod is surveyed, and VCC pin by HDMI is supplied power for).
Television rod method of supplying power in the present embodiment：When HDMI external devices are detected, master chip is based on
Input detecting circuit sends detection signal to terminal device, if receiving the feedback signal that terminal device feeds back according to detection signal
When, driving power module is powered to terminal device after master chip judges terminal device as television rod；By relatively low cost,
Terminal device to being connected on television set is detected, when detection obtains the terminal device for television rod, it is powered
Operation, is powered without user using other equipment, is realized television rod and is easily powered, while being drawn by the 18th of HDMI the, 19
Pin, will not produce influence to existing function, and also other connection equipment will not be caused damage, and accurately easily television rod is entered
Row automatic identification is powered.
Alternatively, second embodiment is proposed on the basis of television rod method of supplying power to first embodiment, is implemented second
Input detecting circuit described in example includes triode Q1, direct current tandem circuit, AC detection circuit and the inspection of mutual circuit communication
End GPIO2 is surveyed, test side GPIO2 is connected with triode Q1 emitter circuits, and AC detection circuit is connected with direct current tandem circuit
Connected with triode Q1 base circuits,
As shown in figure 3, the connection of direct current tandem circuit 400, AC detection circuit 500, test side GPIO2 and triode Q1
Relation, it is necessary to explanation be the 3rd electric capacity C3, direct current tandem circuit 400 can be divided into, can also be divided into AC detection circuit
500；When test side GPIO2 is used to confirm that terminal device is television rod power supply signal is sent to master chip；In the present embodiment three
Pole pipe Q1 is NPN type triode.
The step S10 includes：
Step S11, when HDMI external devices are detected, master chip is based on AC detection circuit to triode
The base stage and terminal device of Q1 send AC signal, and direct current signal is sent to the base stage of triode Q1 based on direct current tandem circuit.
With reference to Fig. 3, television rod method of supplying power to of the present invention is mainly used on television set, when TV set circuit connection (start
Work) when, AC detection circuit can be based in the input detecting circuit on television set and sends exchange letter to the base stage of triode Q1
Number (AC signal：The alternating current of fixed frequency pre-set peak value), send straight to the base stage of triode Q1 based on direct current tandem circuit
Stream signal (direct current signal：The direct current of fixed voltage value)；In HDMI external devices, master chip is based on exchange and examines
Slowdown monitoring circuit sends AC signal to external devices.
Specifically, when television boot-strap works, input detecting circuit sends default to the base stage of NPN type triode Q1
The alternating current that frequency peak is fixed, while direct current tandem circuit sends the direct current of predeterminated voltage by NPN type triode Q1's
Base stage；And when HDMI external devices are detected, AC signal is sent to terminal device based on AC detection circuit；
It should be further stated that, the present embodiment is priority scheme, if input detecting circuit is improved, is identifying that terminal sets
Sending voltage signal to the base stage of triode Q1 again after standby access should also be included in the range of this programme protection.
In the present embodiment, it is triode Q1, direct current tandem circuit, the friendship of mutual circuit communication by input detecting circuit
Current detection circuit and test side GPIO2, when terminal device is connected by HDMI with television set, spy are refined as by electric signal
Determine the alternating current of frequency and the direct current of fixed voltage, the terminal device for accessing television set detects identification, can be more accurate
True carries out terminal device identification, while detecting that circuit structure is clear, cost is relatively low workable.
Alternatively, reference picture 6, propose 3rd embodiment, institute on the basis of television rod method of supplying power to second embodiment
Stating step S20 also includes：
Step S21, the feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, and obtain feedback signal,
The total signal strength of AC signal and direct current signal；
Access the detection signal (detection that the terminal device of television set HDMI will send in television set input detecting circuit
Signal：In input detecting circuit by preinstalled circuit element formed CF, waveform, peak value alternating current) reception processing
Feedback signal (feedback signal is formed afterwards：The ac signal that will be received in terminal device, the exchange telecommunications for arriving after treatment
Number), television set master chip is returned to, the feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, master chip is obtained
Negate the total signal strength (total signal strength of feedback signal, AC signal and direct current signal：All direct currents in detection circuit, hand over
Stream electricity entered the electric signal that superposition is obtained, and total signal strength is presented as Current Voltage value in this programme).
Whether step S22, master chip judges total signal strength more than preset signal strength, if total signal strength is more than default
Signal intensity, driving power module is powered to terminal device after master chip judges terminal device as television rod.
The total signal strength that master chip will get compares with by preset signal strength, and result of the comparison passes through circuit element
Performance, when total signal strength (total current magnitude of voltage) be more than preset signal strength (preset voltage value)；Master chip is according to voltage
Value identification terminal equipment, is confirming to drive the pin VCC power modules of HDMI the 18th to TV after terminal device is television rod
Rod is powered.
With reference to Fig. 3, the Q1 of NPN type triode is connected in input detecting circuit, (conducting voltage of NPN type triode is big
About 0.7V i.e., the electrical potential difference Ube=0.7V of base stage and emitter stage, by the Q1 base voltages V of NPN type triodeQ1Represent,
Ube=VQ1- Ve, the triode Q1 emitter voltage Ve=0 in input detecting circuit), master chip is by the Q1 bases of NPN type triode
Pole tension VQ1Size with conducting voltage Ube compares；After terminal device access, triode Q1 base voltages VQ1, it is alternating current
Voltage be superimposed with DC voltage and feedback current voltage signal after summation, when triode Q1 base stage total voltages VQ1 be more than or wait
When the conducting voltage 0.7V of triode, triode ON test side GPIO2 output power supply signal (power supply signals：In this programme
With the pulse signal of CF as power supply signal), master chip receives the power supply signal of test side GPIO2 outputs, master chip
According to the power supply signal for receiving, control power module is powered to television rod.
In the present embodiment, the ac signal of master chip receiving terminal apparatus, obtains total current magnitude of voltage in circuit, after
Whether compare total signal strength more than preset signal strength, if driving power supply after judging terminal device as television rod more than master chip
Module is powered to terminal device, and triode Q1 conducting voltages Ube as preset signal strength, is compared triode by master chip
Q1 base stages total voltage and triode Q1 conducting voltages, when triode Q1 turn on, then master chip reception test side GPIO2 powers letter
Number, master chip is powered according to the power supply signal for receiving, control power module to television rod；By the height of voltage, identification connects
The terminal device accuracy rate for entering television set is high, is not in the situation that identification mistake power supply burns out terminal device, using triode
Conducting judge access television set terminal device easily for television rod is powered, without artificial external power supply unit.
Alternatively, fourth embodiment, the test side are proposed on the basis of television rod method of supplying power to 3rd embodiment
GPIO2 is connected with master chip, and the direct current tandem circuit includes power vd D, first resistor R1, second resistance R2, the 4th resistance
R4, the first electric capacity C1 and the 3rd electric capacity C3, power vd D one end and first resistor R1, second resistance R2 and first electric capacity C1 one end
Connection；The first resistor R1 other ends are connected with one end of triode Q1 base stages, the 4th resistance R4 and the 3rd electric capacity C3；First electric capacity
The other end of C1 is connected with test side GPIO2, triode Q1 base electrodes, the other end and the triode Q1 base electrodes of second resistance R2
Connection, the emitter stage of triode Q1 be connected with the 4th resistance R4 other ends after earth terminal；
The AC detection circuit includes：Second electric capacity C2,3rd resistor R3, the 4th electric capacity C4 and input GPIO1, it is defeated
Enter to hold GPIO1 to be connected with 3rd resistor R3 one end, the one of the other end of 3rd resistor R3 and the second electric capacity C2 and the 4th electric capacity C4
End connection, the other end earth terminal of the 4th electric capacity C4, the second electric capacity C2 other ends are connected with the 3rd electric capacity C3 with HDMI；
The step S10 also includes：
Step S12, master chip is based on direct current signals of the power vd D to input detecting circuit input voltage value V1, direct current letter
Number by base stage from first resistor R1 to triode Q1 send direct current signal；
With reference to Fig. 3, the power vd D connection television set master chips power supply (master of default television set in direct current tandem circuit 400
The voltage of board chip is 3.3 volts, if television set master chip voltage is not 3.3 volts, as long as not influenceing the function of mainboard chip equal
Can), VDD provides power supply for detection circuit, and master chip is based on power vd D to be believed to the direct current of input detecting circuit input voltage value V1
Number, direct current signal sends the direct current signal of magnitude of voltage V1 by first resistor R1 to the base stage of triode Q1, the 3rd electric capacity C3 every
The straight effect for taking friendship, direct current does not interfere with AC detection circuit 500, it is assumed that exchange detection zone 500 is without by the 3rd electric capacity
The alternating current of C3, now the base voltage V of NPN type triodeQ1It is only related to first resistor R1 and the 4th resistance R4 resistances, according to
Voltage division formulas V1=VDD*R4/ (R1+R4) (e.g., suitably sets in the present embodiment for the ease of understanding the size of each magnitude of voltage
Put the resistance of R1 and R4 so that V1=350 millivolts) direct current signal of magnitude of voltage V1 is less than triode ON voltage, the mesh of setting
Be for triode ON provides a basic voltage, only needed in AC detection circuit 500 be input into lower voltage value friendship
Stream electricity can just realize the conducting of triode, simultaneously because alternating current needs to enter terminal device, the alternating current of lower voltage value
Can prevent access terminal equipment from burning out.
It should be noted that when it is television rod to identify access device, test side GPIO2 will export a power supply letter
Number master chip is given, after master chip receives signal, power module can be controlled, turned on the power 5V power supplys in module and supplied to television rod
Electricity, VDD here is television set master chip power supply, and the power module powered to television rod is then the special power supply in television set
The power source difference use of both modules is different.
Step S13, master chip is based on input GPIO1 and is input into PWM to input detecting circuit, by the second electric capacity C2 and the
Four electric capacity C4 modulation filtering, obtains the triangular wave of pre-set peak value V2, and will believe as exchange by the triangular wave of the 3rd electric capacity C3
Number, and sent triangular wave as detection signal to terminal device；
Specifically, master chip is input into PWM by input GPIO1 to input detecting circuit, by the second electric capacity C2 the 4th
Electric capacity C4 is filtered, and obtains the triangular wave of pre-set peak value V2；There is no external devices or terminal device to exchange in HDMI
During the detection signal feedback-less signal that detection circuit sends, the triangular wave of pre-set peak value V2 will directly pass through the 3rd electric capacity C3, this
When triode Q1 base voltages VQ1=VDD*R4/ (R1+R4)+V2/2；Simultaneously when external devices are not television rods, preset
The triangular wave of peak value V2 enters external devices as detection signal, and (triangle wave voltage of pre-set peak value V2 is relatively low, is added in HPD
On HDMI external devices will not be damaged), now external terminal feeds back to the voltage signal of master chip and equally can not
Turn-on transistor Q1.
Such as, master chip exports the pwm pulse am signals of a 320kHz and gives the 19th of input GPIO1, HDMI
The triangular wave that peak value is 270 millivolts is had on pin HPD, peak value is 270 millivolts of triangular wave, and being added on HPD will not be right
HDMI access terminal equipments are damaged, now triode Q1 base voltages VQ1It is 350 millivolts+270 millivolts/2=485 millivolts,
It is unable to turn-on transistor Q1.
The step S222 includes：
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, it is main if feedback signal is to amplify signal
Chip will amplify the peak value of signal as V3, calculate the total signal strength of feedback signal, AC signal and direct current signal.
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, if feedback signal is to amplify signal, i.e.,
The magnitude of voltage crest frequency of alternating current is changed in feedback signal, and originally peak value is V3's for the alternating current of V2 is converted into peak value
Alternating current, calculates the total signal strength of now feedback signal, AC signal and direct current signal.
Master chip provides the direct current of predeterminated voltage as direct current signal in the present embodiment, using resistant series partial pressure,
DC voltage is decreased below the conducting voltage of triode, low-voltage basis DC circuit is formed, further detected in input
The alternating current of low-voltage is input into circuit as ac signal, the terminal device for accessing HDMI is entered into, works as television set
What detection identification was linked into HDMI is television rod, and the alternating current of low-voltage will not cause wound to HDMI access terminal equipments
Evil, while it is the purpose of television rod to realize by HDMI detection identification, simple circuit is practical.
Alternatively, to propose television rod described in the 5th embodiment on the basis of television rod method of supplying power to fourth embodiment pre-
If RCL circuits, RCL circuits include the 5th electric capacity C5, the first inductance L1 and the 5th resistance R5, the 5th resistance in the RCL circuits
R5 one end is connected with first inductance L1 one end and HDMI, and the first inductance L1 other ends are connected with the 5th electric capacity C5 one end, the
The five electric capacity C5 other ends be connected with the 5th resistance R5 other ends after earth terminal,
The step S22 also includes：
The AC signal that master chip will send according to AC detection circuit to terminal device, it is anti-that master chip obtains terminal device
Feedback signal, if terminal device is television rod, terminal device is based on the triangular wave of the default RCL circuit presets peak values V2 of television rod
Waveform is converted to the sine wave of pre-set peak value V3, the feedback signal of signal type is amplified to be formed.
With reference to the AC signal that Fig. 3, master chip will send according to AC detection circuit to terminal device, when terminal device is
During television rod, i.e. RCL circuits are preset on television rod and is accessed on the 19th pin HPD, RCL circuits are preset on television rod and is examined with input
Slowdown monitoring circuit point is connected, and waveform is for conversion into the default peak in peak by the triangular wave of pre-set peak value V2 by presetting RCL circuits on television rod
The sine wave that value V3 is, now triode Q1 base voltages VQ1=VDD*R4/ (R1+R4)+V3/2 (e.g., the 19th pins of HDMI
Introduce a RCL circuit on HPD, it is 869 that original peak value is that waveform will occur to become peak-to-peak value 270 millivolts of triangular wave
The sine wave of millivolt, now V1=350 millivolts+869 millivolts/2=784 millivolts of triode Q1 base voltages, NPN triode Q1 is led
It is logical).
The present invention is improved using HDMI to television rod, television rod is not required to circumscribed USB power line, directly by electricity
The HDMI for being linked into television set depending on rod just so can both eliminate the special power supply accessory of television rod with normal work,
Cost is reduced, Consumer's Experience is improved, meanwhile, it is completely compatible existing by increasing simple detection circuit and RCL circuits
HDMI standard, simple circuit cost performance is high, great application prospect.
Television rod method of supplying power to of the present invention is applied to television set, thus television set is improved, and the television set can
It is connected with TV stick circuit, the television set includes HDMI, master chip and the input inspection being connected with HDMI circuit
Slowdown monitoring circuit and power module, the default RCL circuits of the television rod, reference picture 7, the television set include：
Detection identification module 10, for when HDMI external devices are detected, master chip to be based on input and detects
Circuit sends detection signal to terminal device；
At television set HDMI external devices (such as DVD, television rod), inspection is input into detection identification module 10
Slowdown monitoring circuit sends detection signal (detection signal by HDMI to external devices：According to the circuit of input detecting circuit
Connection form forms the alternating current of CF waveform), the detection that external devices can send according to input detecting circuit
Signal forms correspondence feedback signal, is sent to input detecting circuit；As shown in figure 3, input detecting circuit is specified with HDMI
Pin connection, after the issue of existing HDMI1.4 standards, the HDMI function of television set is defined, in this programme the
18 pins will not produce influence after input detecting circuit is connected with the 19th pin on the function of existing each pin.
Conversion power supply module 20, if for receiving during feedback signal that terminal device feeds back according to detection signal, main core
Driving power module is powered to terminal device after piece judges terminal device as television rod.
The detection signal that external devices send according to input detecting circuit forms feedback signal, and master chip is according to input
The detection feedback signal that receives of circuit, confirms that terminal device is that driving power module is supplied to terminal device after television rod
Electricity；Corresponding external devices identification decision is using the 19th pin of HDMI, the existing pin of HDMI the 19th
Function is defined as HPD (hot plug detection), and the 19th pin is used to recognize external equipment, complies fully with HDMI standard, TV
Machine realizes automatic detection identification television rod, and conversion power supply module 20 is powered by the 18th pin VCC pin of HDMI to it, i.e.,
The power module of television set adds 5V power supplys to the 18th pin VCC of HDMI, and television rod is powered；(e.g., work as HDMI
The 19th pin HPD carry out hot plug detect insertion terminal device be DVD or other can HDMI input equipments when, the 19th pin
Input detecting circuit in connection television set, can judge that the terminal device is not television rod, thus television set the 18th pin
Connection power module will not be to the power terminal equipment, HDMI television set realities while other-end equipment normal work is ensured
Show automatic detection identification television rod, and VCC pin by HDMI is supplied power for).
Television set in the present embodiment：When HDMI external devices are detected, master chip is based on input and examines
Slowdown monitoring circuit sends detection signal to terminal device, main if receive the feedback signal that terminal device feeds back according to detection signal
Driving power module is powered to terminal device after chip judges terminal device as television rod；By relatively low cost, to electricity
Depending on machine connect terminal device detected, detection obtain the terminal device for television rod when, operation is powered to it,
Powered using other equipment without user, realize television rod and easily power, while by the 18th of HDMI the, 19 pins, no
Influence can be produced on existing function, other connection equipment will not also be caused damage, accurately easily television rod is carried out certainly
Dynamic identification power supply.
Alternatively, second embodiment is proposed on the basis of television set first embodiment, for institute in second embodiment
State triode Q1 of the input detecting circuit including mutual circuit communication, direct current tandem circuit, AC detection circuit and test side
GPIO2, test side GPIO2 are connected with triode Q1 emitter circuits, AC detection circuit and direct current tandem circuit connection with
Triode Q1 base circuits are connected,
As shown in figure 3, the connection of direct current tandem circuit 400, AC detection circuit 500, test side GPIO2 and triode Q1
Relation, it is necessary to explanation be the 3rd electric capacity C3, direct current tandem circuit 400 can be divided into, can also be divided into AC detection circuit
500；When test side GPIO2 is used to confirm that terminal device is television rod power supply signal is sent to master chip；In the present embodiment three
Pole pipe Q1 is NPN type triode.
Reference picture 8, the detection identification module 10 of the television set includes：
Signal transmitting unit 11, for when HDMI external devices are detected, master chip to be based on exchange and detects
Circuit sends AC signal to the base stage and terminal device of triode Q1, is sent out to the base stage of triode Q1 based on direct current tandem circuit
Send direct current signal.
With reference to Fig. 3, when TV set circuit connection (start work), the input detection of signal transmitting unit 11 on television set
AC detection circuit can be based in circuit and sends AC signal (AC signal to the base stage of triode Q1：Fixed frequency presets peak
The alternating current of value), direct current signal (direct current signal is sent to the base stage of triode Q1 based on direct current tandem circuit：Fixed voltage value
Direct current)；In HDMI external devices, master chip is based on AC detection circuit and sends friendship to external devices
Stream signal.
Specifically, when television boot-strap works, input detecting circuit sends default to the base stage of NPN type triode Q1
The alternating current that frequency peak is fixed, while direct current tandem circuit sends the direct current of predeterminated voltage by NPN type triode Q1's
Base stage；And when HDMI external devices are detected, AC signal is sent to terminal device based on AC detection circuit；
It should be further stated that, the present embodiment is priority scheme, if input detecting circuit is improved, is identifying that terminal sets
Sending voltage signal to the base stage of triode Q1 again after standby access should also be included in the range of this programme protection.
In the present embodiment, it is triode Q1, direct current tandem circuit, the friendship of mutual circuit communication by input detecting circuit
Current detection circuit and test side GPIO2, when terminal device is connected by HDMI with television set, spy are refined as by electric signal
Determine the alternating current of frequency and the direct current of fixed voltage, the terminal device for accessing television set detects identification, can be more accurate
True carries out terminal device identification, while detecting that circuit structure is clear, cost is relatively low workable.
Alternatively, reference picture, 9,3rd embodiment is proposed on the basis of second embodiment, the television set conversion is supplied
Electric module 20 includes：
Signal element 21 is obtained, for the feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, and is obtained
Negate the total signal strength of feedback signal, AC signal and direct current signal；
Access the detection signal (detection that the terminal device of television set HDMI will send in television set input detecting circuit
Signal：In input detecting circuit by preinstalled circuit element formed CF, waveform, peak value alternating current) reception processing
Feedback signal (feedback signal is formed afterwards：The ac signal that will be received in terminal device, the exchange telecommunications for arriving after treatment
Number), television set master chip is returned to, obtain the feedback that the master chip receiving terminal apparatus of signal element 21 are obtained according to AC signal
Signal, master chip obtains the total signal strength (total signal strength of feedback signal, AC signal and direct current signal：In detection circuit
All direct currents, alternating current entered the electric signal that superposition is obtained, and total signal strength is presented as Current Voltage value in this programme).
Compare power supply unit 22, whether total signal strength is judged more than preset signal strength for master chip, if resultant signal
Intensity is more than preset signal strength, and driving power module is supplied to terminal device after master chip judges terminal device as television rod
Electricity.
The total signal strength that master chip will get compares with by preset signal strength, and comparing power supply unit 22 will compare
The performance that result passes through circuit element, when total signal strength (total current magnitude of voltage) is more than preset signal strength (predeterminated voltage
Value)；Master chip drives the pin of HDMI the 18th according to magnitude of voltage identification terminal equipment after confirming terminal device for television rod
VCC power modules are powered to television rod.
With reference to Fig. 3, the Q1 of NPN type triode is connected in input detecting circuit, (conducting voltage of NPN type triode is big
About 0.7V i.e., the electrical potential difference Ube=0.7V of base stage and emitter stage, by the Q1 base voltages V of NPN type triodeQ1Represent,
Ube=VQ1- Ve, the triode Q1 emitter voltage Ve=0 in input detecting circuit), master chip is by the Q1 bases of NPN type triode
Pole tension VQ1Size with conducting voltage Ube compares；After terminal device access, triode Q1 base voltages VQ1, it is alternating current
Voltage be superimposed with DC voltage and feedback current voltage signal after summation, when triode Q1 base stage total voltages VQ1 be more than or wait
When the conducting voltage 0.7V of triode, triode ON test side GPIO2 output power supply signal (power supply signals：In this programme
With the pulse signal of CF as power supply signal), master chip receives the power supply signal of test side GPIO2 outputs, master chip
According to the power supply signal for receiving, control power module is powered to television rod.
In the present embodiment, the ac signal of master chip receiving terminal apparatus, obtains total current magnitude of voltage in circuit, after
Whether compare total signal strength more than preset signal strength, if driving power supply after judging terminal device as television rod more than master chip
Module is powered to terminal device, and triode Q1 conducting voltages Ube as preset signal strength, is compared triode by master chip
Q1 base stages total voltage and triode Q1 conducting voltages, when triode Q1 turn on, then master chip reception test side GPIO2 powers letter
Number, master chip is powered according to the power supply signal for receiving, control power module to television rod；By the height of voltage, identification connects
The terminal device accuracy rate for entering television set is high, is not in the situation that identification mistake power supply burns out terminal device, using triode
Conducting judge access television set terminal device easily for television rod is powered, without artificial external power supply unit.
Alternatively, fourth embodiment, the test side GPIO2 and master are proposed on the basis of television set 3rd embodiment
Chip is connected, and the direct current tandem circuit includes power vd D, first resistor R1, second resistance R2, the 4th resistance R4, the first electricity
Hold C1 and the 3rd electric capacity C3, power vd D one end is connected with first resistor R1, second resistance R2 and first electric capacity C1 one end；First
The resistance R1 other ends are connected with one end of triode Q1 base stages, the 4th resistance R4 and the 3rd electric capacity C3；First electric capacity C1's is another
End is connected with test side GPIO2, triode Q1 base electrodes, and the other end of second resistance R2 is connected with triode Q1 base electrodes, and three
The emitter stage of pole pipe Q1 be connected with the 4th resistance R4 other ends after earth terminal；
The AC detection circuit includes：Second electric capacity C2,3rd resistor R3, the 4th electric capacity C4 and input GPIO1, it is defeated
Enter to hold GPIO1 to be connected with 3rd resistor R3 one end, the one of the other end of 3rd resistor R3 and the second electric capacity C2 and the 4th electric capacity C4
End connection, the other end earth terminal of the 4th electric capacity C4, the second electric capacity C2 other ends are connected with the 3rd electric capacity C3 with HDMI；
The detection identification module 10 also includes：
Direct current signal unit 12, direct currents of the power vd D to input detecting circuit input voltage value V1 is based on for master chip
Signal, direct current signal sends direct current signal by first resistor R1 to the base stage of triode Q1；
With reference to Fig. 3, the power vd D connection television set master chips power supply (master of default television set in direct current tandem circuit 400
The voltage of board chip is 3.3 volts, if television set master chip voltage is not 3.3 volts, as long as not influenceing the function of mainboard chip equal
Can), VDD provides power supply for detection circuit, and master chip direct current signal unit 12 is based on power vd D and is input into electricity to input detecting circuit
The direct current signal of pressure value V1, direct current signal is believed by first resistor R1 to the direct current that the base stage of triode Q1 sends magnitude of voltage V1
Number, the 3rd electric capacity C3 blockings take the effect of friendship, and direct current does not interfere with AC detection circuit 500, it is assumed that exchange detection zone 500
Pass through the 3rd electric capacity C3 without alternating current, now the base voltage V of NPN type triodeQ1Only with first resistor R1 and the 4th resistance R4
Resistance is related, according to voltage division formulas V1=VDD*R4/ (R1+R4) (e.g., for the ease of understanding the size of each magnitude of voltage in this reality
Apply the resistance that R1 and R4 are appropriately arranged with example so that V1=350 millivolts) direct current signal of magnitude of voltage V1 is less than triode ON electricity
Pressure, the purpose of setting is, for triode ON provides a basic voltage, input to be only needed in AC detection circuit 500 relatively low
The alternating current of magnitude of voltage can just realize the conducting of triode, simultaneously because alternating current needs to enter terminal device, low voltage
The alternating current of value can prevent access terminal equipment from burning out.
It should be noted that when it is television rod to identify access device, test side GPIO2 will export a power supply letter
Number master chip is given, after master chip receives signal, power module can be controlled, turned on the power 5V power supplys in module and supplied to television rod
Electricity, VDD here is television set master chip power supply, and the power module powered to television rod is then the special power supply in television set
The power source difference use of both modules is different.
AC signal unit 13, is based on input GPIO1 and is input into PWM to input detecting circuit, by for master chip
Two electric capacity C2 and the 4th electric capacity C4 modulation filtering, obtains the triangular wave of pre-set peak value V2, and by by the triangle of the 3rd electric capacity C3
Ripple is sent to terminal device as AC signal using triangular wave as detection signal；
Specifically, AC signal unit 13 is input into PWM by input GPIO1 to input detecting circuit, by the second electricity
Hold the electric capacity C4 of C2 the 4th filtering, obtain the triangular wave of pre-set peak value V2；There is no external devices or terminal to set in HDMI
During for the detection signal feedback-less signal sent to AC detection circuit, the triangular wave of pre-set peak value V2 will directly by the 3rd electricity
Hold C3, now triode Q1 base voltages VQ1=VDD*R4/ (R1+R4)+V2/2；Simultaneously when external devices are not television rods
When, the triangular wave of pre-set peak value V2 as detection signal enter external devices (triangle wave voltage of pre-set peak value V2 is relatively low,
Being added on HPD will not damage to HDMI external devices), now external terminal feed back to master chip voltage signal it is same
Sample is unable to turn-on transistor Q1.
Such as, master chip exports the pwm pulse am signals of a 320kHz and gives the 19th of input GPIO1, HDMI
The triangular wave that peak value is 270 millivolts is had on pin HPD, peak value is 270 millivolts of triangular wave, and being added on HPD will not be right
HDMI access terminal equipments are damaged, now triode Q1 base voltages VQ1It is 350 millivolts+270 millivolts/2=485 millivolts,
It is unable to turn-on transistor Q1.
The power supply unit 22 that compares includes：
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, it is main if feedback signal is to amplify signal
Chip will amplify the peak value of signal as V3, calculate the total signal strength of feedback signal, AC signal and direct current signal.
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, if feedback signal is to amplify signal, i.e.,
The magnitude of voltage crest frequency of alternating current is changed in feedback signal, and originally peak value is V3's for the alternating current of V2 is converted into peak value
Alternating current, calculates the total signal strength of now feedback signal, AC signal and direct current signal.
Master chip provides the direct current of predeterminated voltage as direct current signal in the present embodiment, using resistant series partial pressure,
DC voltage is decreased below the conducting voltage of triode, low-voltage basis DC circuit is formed, further detected in input
The alternating current of low-voltage is input into circuit as ac signal, the terminal device for accessing HDMI is entered into, works as television set
What detection identification was linked into HDMI is television rod, and the alternating current of low-voltage will not cause wound to HDMI access terminal equipments
Evil, while it is the purpose of television rod to realize by HDMI detection identification, simple circuit is practical.
Alternatively, the 5th embodiment, the default RCL circuits of the television rod, RCL are proposed on the basis of fourth embodiment
Circuit includes the 5th electric capacity C5, the first inductance L1 and the 5th resistance R5, the 5th resistance R5 one end and the first electricity in the RCL circuits
Sense L1 one end and HDMI connection, the first inductance L1 other ends are connected with the 5th electric capacity C5 one end, the 5th electric capacity C5 other ends
Earth terminal after being connected with the 5th resistance R5 other ends,
The power supply unit 22 that compares also includes：
The AC signal that master chip will send according to AC detection circuit to terminal device, it is anti-that master chip obtains terminal device
Feedback signal, if terminal device is television rod, terminal device is based on the triangular wave of the default RCL circuit presets peak values V2 of television rod
Waveform is converted to the sine wave of pre-set peak value V3, the feedback signal of signal type is amplified to be formed.
With reference to the AC signal that Fig. 3, master chip will send according to AC detection circuit to terminal device, when terminal device is
During television rod, i.e. RCL circuits are preset on television rod and is accessed on the 19th pin HPD, RCL circuits are preset on television rod and is examined with input
Slowdown monitoring circuit point is connected, and waveform is for conversion into the default peak in peak by the triangular wave of pre-set peak value V2 by presetting RCL circuits on television rod
The sine wave that value V3 is, now triode Q1 base voltages VQ1=VDD*R4/ (R1+R4)+V3/2 (e.g., the 19th pins of HDMI
Introduce a RCL circuit on HPD, it is 869 that original peak value is that waveform will occur to become peak-to-peak value 270 millivolts of triangular wave
The sine wave of millivolt, now V1=350 millivolts+869 millivolts/2=784 millivolts of triode Q1 base voltages, NPN triode Q1 is led
It is logical).
The HDMI of television set of the present invention is connected adaptation with the HDMI joints of television rod；When terminal device is television rod
When, television rod receives the detection signal that television set sends, and treatment is carried out to detection signal based on RCL circuits forms feedback signal,
And television rod is improved based on television set, television rod is not required to circumscribed USB power line, television rod is directly linked into TV
The HDMI of machine just so can both eliminate the special power supply accessory of television rod, the realization of lower cost with normal work
The convenient charging of television rod realizes the convenient charging of television rod, and workable, compatible existing HDMI standard will not
There is user in the case of maloperation, cause equipment to reduce cost the problems such as burning out, improve Consumer's Experience, by increasing
Simple R CL circuits, completely compatible existing HDMI standard, simple circuit cost performance is high, great application prospect.
The preferred embodiments of the present invention are these are only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of television rod method of supplying power to, it is characterised in that the television rod method of supplying power to is applied to television set and television rod, institute
Stating television set includes HDMI, master chip and the input detecting circuit and power module that are connected with HDMI circuit, institute
State the default RCL circuits of television rod, the television rod method of supplying power to：
When HDMI external devices are detected, master chip is based on input detecting circuit and sends detection letter to terminal device
Number；
If receive the feedback signal that terminal device feeds back according to detection signal, after master chip judges terminal device as television rod
Driving power module is powered to terminal device.
2. television rod method of supplying power to as claimed in claim 1, it is characterised in that the input detecting circuit includes mutual circuit
The triode (Q1) of connection, direct current tandem circuit, AC detection circuit and test side (GPIO2), test side (GPIO2) and three poles
Pipe (Q1) emitter circuit connection, AC detection circuit and the connection of direct current tandem circuit connect with triode (Q1) base circuit
It is logical,
It is described when HDMI external devices are detected, master chip be based on input detecting circuit to terminal device send examine
Surveying signal includes：
When HDMI external devices are detected, master chip be based on base stage from AC detection circuit to triode (Q1) and
Terminal device sends AC signal, and direct current signal is sent to the base stage of triode (Q1) based on direct current tandem circuit.
3. television rod method of supplying power to as claimed in claim 2, it is characterised in that if the terminal device that receives is according to detection
During the feedback signal of signal feedback, driving power module is supplied to terminal device after master chip judges terminal device as television rod
Electricity includes：
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, and obtain feedback signal, AC signal and straight
Flow the total signal strength of signal；
Whether master chip judges total signal strength more than preset signal strength, main if total signal strength is more than preset signal strength
Driving power module is powered to terminal device after chip judges terminal device as television rod.
4. television rod method of supplying power to as claimed in claim 3, it is characterised in that the test side (GPIO2) connects with master chip
Connect, the direct current tandem circuit includes power supply (VDD), first resistor (R1), second resistance (R2), the 4th resistance (R4), first
Electric capacity (C1) and the 3rd electric capacity (C3), power supply (VDD) one end and first resistor (R1), second resistance (R2) and the first electric capacity (C1)
One end connects；One end of first resistor (R1) other end and triode (Q1) base stage, the 4th resistance (R4) and the 3rd electric capacity (C3)
Connection；The other end of the first electric capacity (C1) is connected with test side (GPIO2), triode (Q1) base electrode, second resistance (R2)
The other end is connected with triode (Q1) base electrode, and the emitter stage of triode (Q1) is grounded after being connected with the 4th resistance (R4) other end
End；
The AC detection circuit includes：Second electric capacity (C2), 3rd resistor (R3), the 4th electric capacity (C4) and input
(GPIO1), input (GPIO1) is connected with 3rd resistor (R3) one end, the other end and the second electric capacity of 3rd resistor (R3)
(C2) and the 4th electric capacity (C4) one end connection, the other end earth terminal of the 4th electric capacity (C4), the second electric capacity (C2) other end with
3rd electric capacity (C3) and HDMI are connected；
The master chip is based on the step of input detecting circuit sends detection signal to terminal device to be included：
Master chip is based on direct current signal of the power supply (VDD) to input detecting circuit input voltage value V1, and direct current signal is by first
Resistance (R1) sends direct current signal to the base stage of triode (Q1)；
Master chip is based on input (GPIO1) and is input into PWM to input detecting circuit, by the second electric capacity (C2) and the 4th electric capacity
(C4) modulation filtering, obtains the triangular wave of pre-set peak value V2, and using by the triangular wave of the 3rd electric capacity (C3) as AC signal,
And sent triangular wave as detection signal to terminal device；
The feedback signal that the receiving terminal apparatus are obtained according to AC signal, and obtain feedback signal, AC signal and direct current
The step of total signal strength of signal, includes：
The feedback signal that master chip receiving terminal apparatus are obtained according to AC signal, if feedback signal is amplification signal, master chip
The peak value of signal will be amplified as V3, the total signal strength of feedback signal, AC signal and direct current signal is calculated.
5. television rod method of supplying power to as claimed in claim 4, it is characterised in that the default RCL circuits of the television rod, RCL electricity
Road include the 5th electric capacity (C5), the first inductance (L1) and the 5th resistance (R5), in the RCL circuits the 5th resistance (R5) one end and
First inductance (L1) one end and HDMI are connected, and the first inductance (L1) other end is connected with the 5th electric capacity (C5) one end, and the 5th
Electric capacity (C5) other end be connected with the 5th resistance (R5) other end after earth terminal,
The feedback signal that the master chip receiving terminal apparatus are obtained according to AC signal, it is main if feedback signal is to amplify signal
Chip will amplify the peak value of signal as V3, the step of calculate the total signal strength of feedback signal, AC signal and direct current signal
Including：
The AC signal that master chip will send according to AC detection circuit to terminal device, master chip obtains terminal device feedback letter
Number, if terminal device is television rod, terminal device is based on the triangular wave of the default RCL circuit presets peak values V2 of television rod by ripple
Shape is converted to the sine wave of pre-set peak value V3, and the feedback signal of signal type is amplified to be formed.
6. a kind of television rod electric supply installation, it is characterised in that the TV function is connected with TV stick circuit, the television set bag
HDMI, master chip and the input detecting circuit and power module that are connected with HDMI circuit are included, the television rod is pre-
If RCL circuits, the master chip includes：
Detection identification module, for when HDMI external devices are detected, being set to terminal based on input detecting circuit
Preparation send detection signal；
Conversion power supply module, if for receiving during feedback signal that terminal device feed back according to detection signal, judgement terminal sets
It is standby for after television rod driving power module be powered to terminal device.
7. television rod electric supply installation as claimed in claim 6, it is characterised in that the input detecting circuit includes mutual circuit
The triode (Q1) of connection, direct current tandem circuit, AC detection circuit and test side (GPIO2), test side (GPIO2) and three poles
Pipe (Q1) emitter circuit connection, AC detection circuit and the connection of direct current tandem circuit connect with triode (Q1) base circuit
Logical, the detection identification module includes：
Signal transmitting unit, for when HDMI external devices are detected, based on AC detection circuit to triode
(Q1) base stage and terminal device sends AC signal, and sending direct current to the base stage of triode (Q1) based on direct current tandem circuit believes
Number.
8. television rod electric supply installation as claimed in claim 7, it is characterised in that the conversion power supply module includes：
Signal element is obtained, for the feedback signal that receiving terminal apparatus are obtained according to AC signal, and feedback signal is obtained, is handed over
The total signal strength of stream signal and direct current signal；
Compare power supply unit, for whether judging total signal strength more than preset signal strength, if total signal strength is more than default
Signal intensity, driving power module is powered to terminal device after master chip judges terminal device as television rod.
9. television rod electric supply installation as claimed in claim 7, it is characterised in that the test side (GPIO2) connects with master chip
Connect, the direct current tandem circuit includes power supply (VDD), first resistor (R1), second resistance (R2), the 4th resistance (R4), first
Electric capacity (C1) and the 3rd electric capacity (C3), power supply (VDD) one end and first resistor (R1), second resistance (R2) and the first electric capacity (C1)
One end connects；One end of first resistor (R1) other end and triode (Q1) base stage, the 4th resistance (R4) and the 3rd electric capacity (C3)
Connection；The other end of the first electric capacity (C1) is connected with test side (GPIO2), triode (Q1) base electrode, second resistance (R2)
The other end is connected with triode (Q1) base electrode, and the emitter stage of triode (Q1) is grounded after being connected with the 4th resistance (R4) other end
End；
The AC detection circuit includes：Second electric capacity (C2), 3rd resistor (R3), the 4th electric capacity (C4) and input
(GPIO1), input (GPIO1) is connected with 3rd resistor (R3) one end, the other end and the second electric capacity of 3rd resistor (R3)
(C2) and the 4th electric capacity (C4) one end connection, the other end earth terminal of the 4th electric capacity (C4), the second electric capacity (C2) other end with
3rd electric capacity (C3) and HDMI are connected；
The detection identification module also includes：
Direct current signal unit, for based on direct current signal from power supply (VDD) to input detecting circuit input voltage value V1, direct current letter
Number by base stage from first resistor (R1) to triode (Q1) send direct current signal；
AC signal unit, for being input into PWM to input detecting circuit based on input (GPIO1), by the second electric capacity (C2)
Modulated with the 4th electric capacity (C4) and filtered, obtain the triangular wave of pre-set peak value V2, and will make by the triangular wave of the 3rd electric capacity (C3)
It is AC signal, and is sent triangular wave as detection signal to terminal device；
The acquisition signal element, is additionally operable to：
The feedback signal that receiving terminal apparatus are obtained according to AC signal, if feedback signal is to amplify signal, will amplify signal
Peak value calculates the total signal strength of feedback signal, AC signal and direct current signal as V3.
10. television rod electric supply installation as claimed in claim 9, it is characterised in that the default RCL circuits of the television rod, RCL electricity
Road include the 5th electric capacity (C5), the first inductance (L1) and the 5th resistance (R5), in the RCL circuits the 5th resistance (R5) one end and
First inductance (L1) one end and HDMI are connected, and the first inductance (L1) other end is connected with the 5th electric capacity (C5) one end, and the 5th
Electric capacity (C5) other end be connected with the 5th resistance (R5) other end after earth terminal,
The acquisition signal element, is additionally operable to
In the feedback signal that receiving terminal apparatus are obtained according to AC signal, if feedback signal will amplify signal to amplify signal
Peak value as V3, according to the AC signal that AC detection circuit will send to terminal device, obtain terminal device feedback signal,
If terminal device is television rod, terminal device is based on the triangular wave of the default RCL circuit presets peak values V2 of television rod by waveform
The sine wave of pre-set peak value V3 is converted to, the feedback signal of signal type is amplified to be formed.
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| CN201611186032.0A CN106713795B (en) | 2016-12-20 | 2016-12-20 | Television stick power supply method and device |
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| CN201611186032.0A CN106713795B (en) | 2016-12-20 | 2016-12-20 | Television stick power supply method and device |
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| 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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| CN106713795B (en) | 2020-04-24 |
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