CN208971648U - A kind of television set and multi-functional TV electromechanical source - Google Patents
A kind of television set and multi-functional TV electromechanical source Download PDFInfo
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Abstract
The utility model discloses a kind of television set and multi-functional TV electromechanical sources, the multi-functional TV electromechanical source includes first grade rectification filtering module, second subprime rectification filtering module and set-top box power supply module, and first grade rectification filtering module exports the first supply voltage to backlight module after carrying out rectifying and wave-filtering to the first secondary voltage that transformer exports；Second subprime rectification filtering module exports the second supply voltage to TV SKD and set-top box power supply module after carrying out rectifying and wave-filtering to the second subprime voltage that transformer exports；Second supply voltage is exported to set-top box when receiving television startup signal and is powered for it by set-top box power supply module, stops the second supply voltage of output, cutting set-top box power supply when receiving television standby signal.The utility model is powered by TV set power to set-top box in television startup, is not necessarily to adapter, is reduced cost, and in television standby, turned off in synchronization set-top box is powered, and saves the idling consumption of set-top box.
Description
Technical field
The utility model relates to technical field of television sets, in particular to a kind of television set and multi-functional TV electromechanical source.
Background technique
Currently, LED television power supply power supply status is mainly that TV power supply is only supplied to main board power supply (+12V) and backlight module
Electricity only meets TV function of supplying power, and the top box of digital machine of television set collocation is all made of individual adapter power supply, and TV
Machine is then in standby when not watching, when television set is in standby, if supplying adapter and set-top box are not in time
Then there is idling consumption in closing, fail to rationally and efficiently use TV power supply.
Thus the prior art could be improved and improve.
Utility model content
Place in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of television sets and multi-functional
TV set power eliminates the supplying adapter of set-top box, can directly pass through TV set power in television startup to set-top box
Power supply, reduces system cost, and in television standby, turned off in synchronization set-top box is powered, and has saved the standby damage of set-top box
Consumption, set-top box is additionally closed without user and also ensures that system power dissipation minimizes, and is good for the environment and energy-saving and emission-reduction.
In order to achieve the above object, the utility model takes following technical scheme:
A kind of multi-functional TV electromechanical source, including EMI filter circuit, pwm control circuit and transformer, the first secondary commutation
Filter module, second subprime rectification filtering module and set-top box power supply module, the transformer include the first auxiliary winding and second
Auxiliary winding；The input AC electricity is successively becoming after EMI filter circuit, pwm control circuit and transformer carry out voltage transformation
The first auxiliary winding and the second auxiliary winding of depressor export the first secondary voltage and second subprime voltage respectively, and first grade is whole
Stream filter module is to the backlight module for exporting the first supply voltage to television set after first secondary voltage progress rectifying and wave-filtering；
The second subprime rectification filtering module exports the second supply voltage to electricity after carrying out rectifying and wave-filtering to the second subprime voltage
Depending on mainboard and set-top box power supply module；The set-top box power supply module is supplied when receiving television startup signal by described second
Piezoelectric voltage is exported to set-top box and is powered for it, stops the second supply voltage of output, cutting machine when receiving television standby signal
Top box power supply.
It further include charging module and third secondary rectification filtering module, the change in the multi-functional TV electromechanical source
Depressor further includes third auxiliary winding；The input AC electricity carries out after voltage transformation also in the third auxiliary winding output of transformer the
Three secondary voltages, output charging is electric after the third secondary rectification filtering module carries out rectifying and wave-filtering to the third secondary voltage
It is depressed into charging module；It is charging external equipment after the charging voltage is converted to predeterminated voltage by the charging module.
Further include feedback module in the multi-functional TV electromechanical source, is supplied by feedback module detection described second
The size of piezoelectric voltage simultaneously exports feedback signal to pwm control circuit, and the pwm control circuit is according to the feedback signal to filtering
Input AC electricity afterwards carries out pulsewidth modulation, keeps constant second supply voltage.
In the multi-functional TV electromechanical source, the set-top box power supply module includes the first partial pressure unit, the first filtering
Unit, first switch unit, the second partial pressure unit, the second filter unit and second switch unit；
When receiving television startup signal, the high level signal of TV SKD output successively passes through the first partial pressure unit
Control first switch unit is connected after carrying out divider filter processing with the second filter unit, makes to be divided through the second partial pressure unit
It is exported afterwards to the control voltage reduction of second switch unit, control second switch unit conducting, second supply voltage is through the
Output is powered to set-top box for it after two filtering unit filters；
When receiving television standby signal, the low level signal of TV SKD output successively passes through the first partial pressure unit
Control first switch unit turns off after carrying out divider filter processing with the second filter unit, makes second supply voltage through second
The control voltage of output to second switch unit increases after partial pressure unit is divided, and control second switch unit shutdown stops
The second supply voltage is exported to set-top box.
In the multi-functional TV electromechanical source, the set-top box power supply module further includes delay cell, for controlling
Voltage is connected again after controlling the second switch cell delay preset time when reducing.
In the multi-functional TV electromechanical source, first partial pressure unit includes first resistor, second resistance and the 4th
Diode, first filter unit include the 4th capacitor and the 5th capacitor；The first switch unit includes the first triode；
Second partial pressure unit includes 3rd resistor and the 4th resistance；Second filter unit includes the 6th capacitor and the 7th electricity
Hold；The second switch unit includes the first metal-oxide-semiconductor；The PS_ON letter of the anode connection TV SKD of 4th diode
Number end, the cathode of the 4th diode connects one end of the first resistor and one end of the 4th capacitor；The first resistor
The other end connect the base stage of one end of the second resistance, one end of the 5th capacitor and the first triode；4th capacitor
The other end, second resistance the other end, the other end of the 5th capacitor and the emitter of the first triode be grounded；Described first
The collector of triode connects one end of the 3rd resistor, and the other end of the 3rd resistor connects the delay cell and the
One end of four resistance；The other end of 4th resistance connects the output end of the second subprime rectification filtering module, delay list
The source electrode of member and the first metal-oxide-semiconductor；The grid of first metal-oxide-semiconductor connects the delay cell, and the drain electrode of first metal-oxide-semiconductor connects
Connect one end of the 6th capacitor, one end of the 7th capacitor and set-top box；The other end of 6th capacitor and the 7th capacitor
The other end is grounded.
In the multi-functional TV electromechanical source, the delay cell includes the 8th capacitor, the 5th resistance and the five or two pole
Pipe；One end of 5th resistance and the anode of the 5th diode are all connected with the other end of the 3rd resistor, the 5th electricity
The other end of resistance connects one end, the cathode of the 5th diode and the grid of the first metal-oxide-semiconductor of the 8th capacitor；8th electricity
The other end of appearance connects the output end of the second subprime rectification filtering module and the source electrode of the first metal-oxide-semiconductor.
In the multi-functional TV electromechanical source, the feedback module include the 6th resistance, the 7th resistance, the 8th resistance,
9th resistance, the 9th capacitor, the tenth capacitor, optocoupler and voltage-stablizer；It is whole that one end of 6th resistance connects the second subprime
Filter module is flowed, the other end of the 6th resistance connects one end, one end of the 8th resistance, the 9th capacitor of the 7th resistance
One end and voltage-stablizer voltage set end；The other end of 7th resistance and the anode of voltage-stablizer are grounded；Described 8th
The other end of resistance connects one end of the tenth capacitor；The other end of tenth capacitor connects the another of the 9th capacitor
It holds, the 2nd end of the cathode of voltage-stablizer and optocoupler；1st end of the optocoupler connects the second subprime by the 9th resistance
Rectification filtering module, the 3rd end ground connection of the optocoupler；4th end of the optocoupler connects the pwm control circuit.
A kind of television set comprising multi-functional TV electromechanical source as described above.
Compared to the prior art, described multi-functional in television set and multi-functional TV electromechanical source provided by the utility model
TV set power includes that EMI filter circuit, pwm control circuit and transformer, first grade rectification filtering module, second subprime are whole
Filter module and set-top box power supply module are flowed, the transformer includes the first auxiliary winding and the second auxiliary winding；The input AC
Electricity is successively in the first auxiliary winding of transformer and the after EMI filter circuit, pwm control circuit and transformer carry out voltage transformation
Two auxiliary winding export the first secondary voltage and second subprime voltage respectively, and first grade rectification filtering module is to described first
The backlight module of the first supply voltage to television set is exported after secondary voltage progress rectifying and wave-filtering；The second subprime rectifying and wave-filtering
Module exports the second supply voltage to TV SKD and set-top box power supply after carrying out rectifying and wave-filtering to the second subprime voltage
Module；The set-top box power supply module exports second supply voltage to set-top box when receiving television startup signal
It is powered, and stops the second supply voltage of output, cutting set-top box power supply when receiving television standby signal.Eliminate set-top box
Supplying adapter, can directly by TV set power in television startup give set-top box power supply, reduce system cost, and
In television standby, turned off in synchronization set-top box is powered, and has been saved the idling consumption of set-top box, has additionally been closed set-top box without user
It also ensures that system power dissipation minimizes, is good for the environment and energy-saving and emission-reduction.
Detailed description of the invention
Fig. 1 is the structural block diagram of multi-functional TV electromechanical source provided by the utility model；
Fig. 2 is the circuit diagram of multi-functional TV electromechanical source provided by the utility model；
Fig. 3 is the circuit diagram of set-top box power supply module in multi-functional TV electromechanical source provided by the utility model；
Fig. 4 is the circuit diagram of machine charging module in multi-functional TV electromechanical source provided by the utility model.
Specific embodiment
The disadvantages of causing system cost and high power consumption, the utility model are had a single function in view of TV set power in the prior art
Be designed to provide a kind of television set and multi-functional TV electromechanical source, eliminate the supplying adapter of set-top box, can directly lead to
It crosses TV set power to power in television startup to set-top box, reduces system cost, and the turned off in synchronization in television standby
Set-top box power supply, has saved the idling consumption of set-top box, set-top box is additionally closed without user and also ensures that system power dissipation is down to
It is minimum, it is good for the environment and energy-saving and emission-reduction.
To keep the purpose of this utility model, technical solution and effect clearer, clear, develop simultaneously implementation referring to the drawings
The utility model is further described in example.It should be appreciated that specific embodiment described herein is only practical to explain
It is novel, it is not used to limit the utility model.
Referring to Fig. 1, multi-functional TV electromechanical source provided by the utility model, including EMI filter circuit 10, PWM control
Circuit 20,30, first grade rectification filtering modules 100 of transformer, second subprime rectification filtering module 200 and set-top box power supply mould
Block 300, the transformer 30 include the first auxiliary winding and the second auxiliary winding, the EMI filter circuit 10, pwm control circuit 20
Be sequentially connected with 30 main winding of transformer, the first auxiliary winding of first grade rectification filtering module 100 and transformer 30 and
The backlight module of television set connects, the second auxiliary winding, the television set of the second subprime rectification filtering module 200 and transformer 30
Mainboard and set-top box power supply module 300 connect, and the set-top box power supply module 300 is connect with set-top box.Wherein, input AC electricity
Auxiliary winding successively after EMI filter circuit 10, pwm control circuit 20 and transformer 30 carry out voltage transformation in transformer 30 is defeated
Corresponding rear step voltage, specific input AC electricity carry out pulsewidth by pwm control circuit 20 again after EMI is filtered and is rectified out
Modulation is to adjust voltage waveform, the main winding of input primary voltage to transformer 30, after transformer 30 carries out voltage conversion
The first auxiliary winding and the second auxiliary winding of transformer 30 export the first secondary voltage and second subprime voltage respectively, should be noted
It is that the EMI filter circuit 10, pwm control circuit 20 and transformer 30 are the prior art, its connection relationship is not done herein
It repeats.
Two-way secondary voltage is exported after voltage transformation exports, by first grade rectification filtering module 100 to described
The backlight module of the first supply voltage to television set, the second subprime rectification are exported after first secondary voltage progress rectifying and wave-filtering
Filter module 200 exports the second supply voltage to TV SKD and machine top after carrying out rectifying and wave-filtering to the second subprime voltage
Box power supply module 300, i.e., secondary voltage exports and gives backlight module power supply all the way, and another way secondary voltage then exports and gives TV owner
Plate power supply, while also voltage source is provided for set-top box power supply module 300, it is preferable that second subprime voltage also may be output to intelligence
The WIFI module of TV is powered, and set-top box power supply module 300 is when receiving television startup signal by second supply voltage
Output is powered to set-top box for it, stops the second supply voltage of output when receiving television standby signal, and cutting set-top box supplies
Electricity, i.e. the utility model are set-top box power supply without additional supplying adapter, effectively reduce system cost, and pass through
Set-top box power supply state and television boot-strap standby mode can be realized in the working condition for controlling the set-top box power supply module 300
Synchronism switching, synchronize and power in television startup set-top box, power off television standby set-top box is synchronous, user is without additional
Open or close set-top box power supply, provide convenience for user's operation, and when due to television standby can turned off in synchronization set-top box supply
Electricity, therefore the stand-by power consumption of set-top box is completely eliminated, realize more environmentally-friendly energy-efficient power supply plan.
Further, the multi-functional TV electromechanical source further includes charging module 400 and third secondary rectification filtering module
500, the transformer 30 further includes third auxiliary winding, the third secondary rectification filtering module 500 and the third auxiliary winding
It is connected with charging module 400, i.e., in the present embodiment, it is in addition secondary all the way to export that the transformer 30 also has third auxiliary winding
Voltage, the specific input AC electricity also export third secondary electrical in the third auxiliary winding of transformer 30 after carrying out voltage transformation
Pressure, the third secondary rectification filtering module 500 export charging voltage extremely after carrying out rectifying and wave-filtering to the third secondary voltage
Charging module 400 is charging external equipment after the charging voltage is converted to predeterminated voltage by the charging module 400,
For example, mobile phone, mobile power source, tablet computer etc. provide charge function, and the specific predeterminated voltage can be set according to actual needs
It sets, to meet the charging requirement of external equipment, such as is set as common 5V charging voltage and meets filling for most electronic equipments
Electricity demanding further enriches the function of TV set power, provides users with the convenient.
Preferably, the multi-functional TV electromechanical source further includes feedback module 600, and the feedback module 600 connects described
Second subprime rectification filtering module 200 and pwm control circuit 20 detect currently export second by the feedback module 600
The size of supply voltage simultaneously exports the second power supply of corresponding feedback signal to pwm control circuit 20, such as currently practical output
Whether the size of voltage, which is more than or less than preset value, is caused TV SKD power supply instability, the then basis of pwm control circuit 20
The feedback signal carries out pulsewidth modulation to by the filtered input AC electricity of EMI, is input to transformer 30 to adjust
Primary voltage, the second subprime voltage for exporting 30 second auxiliary winding of transformer accordingly change, and then control the second supply voltage
It keeps constant, that realizes the second supply voltage stablizes output, it is ensured that the electrical stability of mainboard.
Further, referring to Fig. 2, the set-top box power supply module 300 is filtered including the first partial pressure unit 301, first
Unit 302, first switch unit 303, the second partial pressure unit 304, the second filter unit 305 and second switch unit 306, it is described
First partial pressure unit 301, the first filter unit 302 and first switch unit 303 are sequentially connected, first partial pressure unit 301
It is also connected with TV SKD, the first switch unit 303 connects second partial pressure unit 304, second partial pressure unit
The output end of the 304 connection second subprime rectification filtering modules 200 also by second switch unit 306 connects described second
Filter unit 305, second filter unit 305 connect set-top box.
When it is implemented, when receiving television startup signal, TV SKD will export a high level signal to described
Set-top box power supply module 300, the high level signal successively passes through the first partial pressure unit 301 and the second filter unit 305 carries out
Control first switch unit 303 is connected after divider filter processing, and the conducting of first switch unit 303 at this time enables single by the second partial pressure
The control voltage that exports reduces after member 304 is divided, and when controlling voltage drop down to default turn-on voltage, described second is opened
Unit 306 to be closed to be connected, second supply voltage output after the filtering of the second filter unit 305 is powered to set-top box for it, into
And realize the synchronous function for set-top box power supply of TV set power, system overall construction is saved, additional set-top box power supply is saved
Adapter.
And when receiving television standby signal, TV SKD will export a low level signal to the set-top box and power
Module 300, the low level signal successively passes through the first partial pressure unit 301 and the second filter unit 305 carries out at divider filter
First switch unit 303 is controlled after reason to turn off, it similarly, will be so that the control voltage liter when first switch unit 303 turns off
Height, when described control unit is greater than default turn-on voltage, the second switch unit 306 is turned off, and stops output the at this time
Two supply voltages cut off the power supply of set-top box to set-top box, therefore can stop completely to the defeated of set-top box in television standby
It powers out, completely eliminates the stand-by power consumption of set-top box, will not occur to forget that additionally closing set-top box makes in electricity due to user
Energy loss caused by still working depending on standby set-top box, effectively save resource, low-carbon environment-friendly.
Preferably, the set-top box power supply unit further includes delay cell 307, and the delay cell 307 connects described
Two partial pressure units 304 and second switch unit 306, the delay cell 307 are used to control described the when controlling voltage reduces
It is connected again after two switch units 306 delay preset time, i.e., after when receiving television startup signal, the control voltage is reduced
Second switch unit 306 is not connected not instead of immediately, is connected again after postponing preset time, specific delay time can set as needed
It is fixed, by the delay cell 307 can prevent the moment switched in television boot-strap motor status generate excessively high current spike from
And back end device is damaged, effectively increase the safety and reliability of device work.
Specifically, first grade rectification filtering module 100 includes first diode D1 and first capacitor C1, and described the
Secondary stage rectification filtering module 200 includes the second diode D2 and the second capacitor C2, the third secondary rectification filtering module 500
Including third diode D3 and third capacitor C3, the anode of the first diode D1 connects one end of first auxiliary winding
(transformer PIN11), the cathode of the first diode D1 connect one end and the backlight module of the first capacitor C1, and described
The other end of one capacitor C1 connects the other end (transformer PIN10) and ground of first auxiliary winding；The second diode D2
Anode connect one end (transformer PIN9) of second auxiliary winding, the cathode of the second diode D2 connects the feedback
Module 600, one end of the second capacitor C2, TV SKD and set-top box power supply module 300；The other end of the second capacitor C2
Connect the other end (transformer PIN8) and ground of second auxiliary winding；The anode of the third diode D3 connects the third
One end (transformer PIN7) of auxiliary winding, the cathode of the third diode D3 connect one end and the charging of the third capacitor C3
The other end of module 400, the third capacitor C3 connects the other end (transformer PIN6) and ground of the third auxiliary winding.
In the present embodiment, the input AC electricity successively passes through EMI filter circuit 10, pwm control circuit 20 and transformer
Three road secondary voltages are exported after 30, the first secondary voltage of first via output is through first diode D1 and first capacitor C1 rectification filter
It after wave, powers to LED Driver (backlight module), specific LED Driver can take BOOST Boost topology or BUCK to be depressured and open up
Framework is flutterred, this is the prior art；The second subprime voltage of second tunnel output is through the second diode D2 and the second capacitor C2 rectification filter
It exports+12V voltage after wave to power to TV SKD and WIFI module, and also after output to set-top box power supply module 300
It powers to set-top box；The third secondary voltage of third road output exports after third diode D3 and third capacitor C3 rectifying and wave-filtering
Charging voltage Vcin is converted into predeterminated voltage after carrying out boost or depressurization by charging module 400, is external connected electronic equipment
Power supply increases the functional requirement of television set to utmostly utilize TV set power, keeps user more convenient to use fast
Victory, and effective saved energy consumption.
Further, first partial pressure unit 301 includes first resistor R1, second resistance R2 and the 4th diode D4,
First filter unit 302 includes the 4th capacitor C4 and the 5th capacitor C5；The first switch unit 303 includes the one or three pole
Pipe Q1；Second partial pressure unit 304 includes 3rd resistor R3 and the 4th resistance R4；Second filter unit 305 includes the
Six capacitor C6 and the 7th capacitor C7；The second switch unit 306 includes the first metal-oxide-semiconductor M1；The 4th diode D4 is just
Pole connects the PS_ON signal end of TV SKD, and the cathode of the 4th diode D4 connects one end of the first resistor R1
With one end of the 4th capacitor C4；The other end of the first resistor R1 connects one end of the second resistance R2, the 5th capacitor C5
One end and the first triode Q1 base stage；The other end, the 5th capacitor of the other end of the 4th capacitor C4, second resistance R2
The emitter of the other end of C5 and the first triode Q1 are grounded；The collector of the first triode Q1 connects the third electricity
One end of R3 is hindered, the other end of the 3rd resistor R3 connects one end of the delay cell 307 and the 4th resistance R4；Described
The other end of four resistance R4 connects output end, delay cell 307 and the first MOS of the second subprime rectification filtering module 200
The source electrode of pipe M1；The grid of the first metal-oxide-semiconductor M1 connects the delay cell 307, the drain electrode connection of the first metal-oxide-semiconductor M1
One end of the 6th capacitor C6, one end of the 7th capacitor C7 and set-top box；The other end of the 6th capacitor C6 and the 7th electricity
The other end for holding C7 is grounded.In the present embodiment, the first metal-oxide-semiconductor M1 is PMOS tube.
The delay cell 307 includes the 8th capacitor C8, the 5th resistance R5 and the 5th diode D5；The 5th resistance R5
One end and the anode of the 5th diode D5 be all connected with the other end of the 3rd resistor R3, the other end of the 5th resistance R5
Connect one end, the cathode of the 5th diode D5 and the grid of the first metal-oxide-semiconductor M1 of the 8th capacitor C8；The 8th capacitor C8
The other end connect the output end of the second subprime rectification filtering module 200 and the source electrode of the first metal-oxide-semiconductor M1.
When it is implemented, television set when not watching, is in standby, when television set switchs to the shape that is switched on by standby mode
When state, after exporting power-on instruction to mainboard using remote controler or standby key, mainboard issues PS_ON high level signal, through the 4th
Diode D4, first resistor R1 and second resistance R2 are divided and after the 4th capacitor C4 and the 5th capacitor C5 filtering, make first
Triode Q1 saturation conduction, so that the grid of output to the first metal-oxide-semiconductor M1 are electric after 3rd resistor R3 and the 4th resistance R4 partial pressure
Force down+12V the voltage in source electrode, the first metal-oxide-semiconductor M1 conducting, after after the 6th capacitor C6 and the 7th capacitor C7 filtering, pass through
Port Socket output, then be connected by connecting line with set-top box supply port, it powers when realizing booting to set-top box.And it is
The safety for improving circuit work, the delay circuit being made up of the 8th capacitor C8, the 5th resistance R5 and the 5th diode D5,
So that the first metal-oxide-semiconductor M1 delay is opened, prevent switching moment from generating excessively high current spike, reaches the mesh of protection back end device
's.
And when TV standby, after exporting standby command to mainboard using remote controler or standby key, mainboard issues PS_
ON low level signal divides through the 4th diode D4, first resistor R1 and second resistance R2 and passes through the 4th capacitor C4 and the 5th
After capacitor C5 filtering, end the first triode Q1, so that exporting after 3rd resistor R3 and the 4th resistance R4 partial pressure to first
The grid voltage of metal-oxide-semiconductor M1 is suitable with source electrode+12V voltage, the first metal-oxide-semiconductor M1 cut-off, port Socket Non voltage output, thus
Top box of digital machine power supply is cut off, set-top box is in off-mode, this set-top box is without electric energy loss.
Preferably, the feedback module 600 includes the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance
R9, the 9th capacitor C9, the tenth capacitor C10, optocoupler U1 and voltage-stablizer U2；Described second of one end connection of the 6th resistance R6
Grade rectification filtering module 200, specifically connects the cathode of the second diode D2, and the other end of the 6th resistance R6 connects institute
State the voltage setting end of one end of the 7th resistance R7, one end of the 8th resistance R8, one end of the 9th capacitor C9 and voltage-stablizer U2；Institute
The anode of the other end and voltage-stablizer U2 of stating the 7th resistance R7 is grounded；The other end connection the described tenth of the 8th resistance R8
One end of capacitor C10；The other end of the tenth capacitor C10 connect the other end of the 9th capacitor C9, voltage-stablizer U2 it is negative
2nd end of pole and optocoupler U1；The 1st end of the optocoupler U1 passes through the 9th resistance R9 connection second subprime rectifying and wave-filtering
Module 200 specifically connects the cathode of the second diode D2, the 3rd end ground connection of the optocoupler U1；The 4th of the optocoupler U1
End connects the pwm control circuit 20, TL431 three terminal regulator is used in the present embodiment, by utilizing voltage-stablizer U2 and optocoupler
U1 constitutes feed circuit, when the second supply voltage fluctuates, the sampling voltage that is obtained through divider resistance in voltage-stablizer U2
Reference voltage be compared, form error voltage on cathode, so that the LED operation electric current in optocoupler U1 is changed, then lead to
It crosses optocoupler U1 and exports feedback signal to pwm control circuit 20, the duty ratio of input voltage is adjusted by pwm control circuit 20, from
And realization+12V exports pressure stabilizing, it is ensured that TV SKD powered stable.
Further, referring to Figure 4 together, it is the schematic diagram of the charging module 400, passes through the pair in transformer 30
Side increases third auxiliary winding PIN7-PIN5, and third secondary voltage is defeated after third diode D3 and third capacitor C3 rectifying and wave-filtering
Charging voltage is specifically accessed lifting/voltage reducing converter, i.e. BUCK-BOOST topology to charging module 400 by charging voltage Vcin out
Circuit, due to allowing charging voltage Vcin to have fluctuation range using after the lifting/voltage reducing converter, can be without pressure stabilizing at
Reason, charging voltage Vcin export Vcout variable voltage after BUCK-BOOST circuit, when with external equipment progress charge protocol
After scheme matching, be connected the second metal-oxide-semiconductor under the control of charging chip, output predeterminated voltage to charging interface J1 is external
Equipment charge, the specific charging chip are preferably quick charge chip, such as the fast charge IC of model LP28300 etc.,
Due to TV generally can in booting or standby both of which all can be by charging interface J1 to external under the both of which
Equipment charges, and TV power supply is utmostly utilized, and enriches TV power supply function, which can be located at TV
Main board in interior power part or TV can also be fixed in TV, by easily exporting as a separate modular
Charging interface, it is user-friendly.
Based on above-mentioned multi-functional TV electromechanical source, the utility model correspondingly provides a kind of television set, the television set packet
Multi-functional TV electromechanical source as described above is included, since the multi-functional TV electromechanical source being described in detail above,
It is not described further herein.
In conclusion in television set provided by the utility model and multi-functional TV electromechanical source, the multi-function TV set
Power supply includes EMI filter circuit, pwm control circuit and transformer, first grade rectification filtering module, second subprime rectifying and wave-filtering
Module and set-top box power supply module, the transformer include the first auxiliary winding and the second auxiliary winding；The input AC electricity is successively
After EMI filter circuit, pwm control circuit and transformer carry out voltage transformation the first auxiliary winding of transformer and second it is secondary around
Group exports the first secondary voltage and second subprime voltage respectively, and first grade rectification filtering module is to first secondary electrical
The backlight module of the first supply voltage to television set is exported after pressure progress rectifying and wave-filtering；The second subprime rectification filtering module pair
The second subprime voltage exports the second supply voltage to TV SKD and set-top box power supply module after carrying out rectifying and wave-filtering；Institute
It states set-top box power supply module and exports second supply voltage to set-top box when receiving television startup signal and power for it,
Stop the second supply voltage of output, cutting set-top box power supply when receiving television standby signal.Eliminate the power supply of set-top box
Adapter can directly be powered to set-top box in television startup by TV set power, reduce system cost, and in TV
Turned off in synchronization set-top box is powered when standby, has saved the idling consumption of set-top box, set-top box is additionally closed without user also can be true
Insurance system power consumption minimizes, and is good for the environment and energy-saving and emission-reduction.
It is understood that for those of ordinary skills, can with technical solution according to the present utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement all should belong to appended by the utility model
Scope of protection of the claims.
Claims (9)
1. a kind of multi-functional TV electromechanical source, including EMI filter circuit, pwm control circuit and transformer, which is characterized in that also
Including first grade rectification filtering module, second subprime rectification filtering module and set-top box power supply module, the transformer includes
First auxiliary winding and the second auxiliary winding；Input AC electricity successively carries out electricity through EMI filter circuit, pwm control circuit and transformer
Buckling in the first auxiliary winding of transformer and the second auxiliary winding exports the first secondary voltage and second subprime voltage, institute after changing respectively
It states after first grade rectification filtering module carries out rectifying and wave-filtering to first secondary voltage and exports the first supply voltage to TV
The backlight module of machine；The second subprime rectification filtering module exports second after carrying out rectifying and wave-filtering to the second subprime voltage
Supply voltage is to TV SKD and set-top box power supply module；The set-top box power supply module is when receiving television startup signal
Second supply voltage is exported to set-top box and is powered for it, stops the second power supply of output when receiving television standby signal
Voltage, cutting set-top box power supply.
2. multi-functional TV electromechanical source according to claim 1, which is characterized in that further include that charging module and third are secondary
Rectification filtering module, the transformer further include third auxiliary winding；Also in transformation after the input AC electricity progress voltage transformation
The third auxiliary winding of device exports third secondary voltage, and the third secondary rectification filtering module carries out the third secondary voltage
Charging voltage is exported after rectifying and wave-filtering to charging module；After the charging voltage is converted to predeterminated voltage by the charging module
For charging external equipment.
3. multi-functional TV electromechanical source according to claim 1, which is characterized in that further include feedback module, by described anti-
Feedback module detects the size of second supply voltage and exports feedback signal to pwm control circuit, the pwm control circuit root
Pulsewidth modulation is carried out to filtered input AC electricity according to the feedback signal, keeps constant second supply voltage.
4. multi-functional TV electromechanical source according to claim 1, which is characterized in that the set-top box power supply module includes the
One partial pressure unit, the first filter unit, first switch unit, the second partial pressure unit, the second filter unit and second switch unit；
When receiving television startup signal, the high level signal of TV SKD output successively passes through the first partial pressure unit and the
Two filter units carry out control first switch unit conducting after divider filter processing, make defeated after the second partial pressure unit is divided
It is reduced out to the control voltage of second switch unit, control second switch unit conducting, second supply voltage is through the second filter
It exports after the filtering of wave unit and powers to set-top box for it；
When receiving television standby signal, the low level signal of TV SKD output successively passes through the first partial pressure unit and the
Two filter units carry out control first switch unit shutdown after divider filter processing, make second supply voltage through the second partial pressure
The control voltage of output to second switch unit increases after unit is divided, and control second switch unit shutdown stops output
Second supply voltage is to set-top box.
5. multi-functional TV electromechanical source according to claim 4, which is characterized in that the set-top box power supply module further includes
Delay cell, for being connected again after controlling the second switch cell delay preset time when controlling voltage reduces.
6. multi-functional TV electromechanical source according to claim 5, which is characterized in that first partial pressure unit includes first
Resistance, second resistance and the 4th diode, first filter unit include the 4th capacitor and the 5th capacitor；The first switch
Unit includes the first triode；Second partial pressure unit includes 3rd resistor and the 4th resistance；The second filter unit packet
Include the 6th capacitor and the 7th capacitor；The second switch unit includes the first metal-oxide-semiconductor；The anode connection electricity of 4th diode
Depending on the PS_ON signal end of mainboard, the cathode of the 4th diode connects one end and the 4th capacitor of the first resistor
One end；The other end of the first resistor connects one end of the second resistance, one end of the 5th capacitor and the first triode
Base stage；The other end of 4th capacitor, the other end of second resistance, the 5th capacitor the other end and the first triode transmitting
Extremely it is grounded；The collector of first triode connects one end of the 3rd resistor, and the other end of the 3rd resistor connects
Connect one end of the delay cell and the 4th resistance；The other end of 4th resistance connects the second subprime rectifying and wave-filtering mould
The source electrode of the output end of block, delay cell and the first metal-oxide-semiconductor；The grid of first metal-oxide-semiconductor connects the delay cell, described
The drain electrode of first metal-oxide-semiconductor connects one end of the 6th capacitor, one end of the 7th capacitor and set-top box；6th capacitor it is another
The other end of one end and the 7th capacitor is grounded.
7. multi-functional TV electromechanical source according to claim 6, which is characterized in that the delay cell includes the 8th electricity
Appearance, the 5th resistance and the 5th diode；One end of 5th resistance and the anode of the 5th diode are all connected with the third electricity
The other end of the other end of resistance, the 5th resistance connects the cathode and first of one end of the 8th capacitor, the 5th diode
The grid of metal-oxide-semiconductor；The other end of 8th capacitor connects the output end and the first MOS of the second subprime rectification filtering module
The source electrode of pipe.
8. multi-functional TV electromechanical source according to claim 3, which is characterized in that the feedback module includes the 6th electricity
Resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 9th capacitor, the tenth capacitor, optocoupler and voltage-stablizer；The one of 6th resistance
End connects the second subprime rectification filtering module, and the other end of the 6th resistance connects one end of the 7th resistance, the
The voltage of one end of eight resistance, one end of the 9th capacitor and voltage-stablizer sets end；The other end and voltage-stablizer of 7th resistance
Anode be grounded；The other end of 8th resistance connects one end of the tenth capacitor；The other end of tenth capacitor
Connect the other end, the cathode of voltage-stablizer and the 2nd end of optocoupler of the 9th capacitor；1st end of the optocoupler passes through described the
Nine resistance connect the second subprime rectification filtering module, the 3rd end ground connection of the optocoupler；4th end of the optocoupler connects institute
State pwm control circuit.
9. a kind of television set, which is characterized in that including the multi-functional TV electromechanical source as described in claim 1-8 any one.
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| CN201821747772.1U CN208971648U (en) | 2018-10-26 | 2018-10-26 | A kind of television set and multi-functional TV electromechanical source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110913159A (en) * | 2019-11-29 | 2020-03-24 | 京东方科技集团股份有限公司 | Digital television, electronic equipment and control method |
| CN112216245A (en) * | 2020-10-09 | 2021-01-12 | 深圳创维－Rgb电子有限公司 | Adjusting circuit and method for module backlight lamp bar of television |
-
2018
- 2018-10-26 CN CN201821747772.1U patent/CN208971648U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110913159A (en) * | 2019-11-29 | 2020-03-24 | 京东方科技集团股份有限公司 | Digital television, electronic equipment and control method |
| CN110913159B (en) * | 2019-11-29 | 2022-08-09 | 高创(苏州)电子有限公司 | Digital television, electronic equipment and control method |
| CN112216245A (en) * | 2020-10-09 | 2021-01-12 | 深圳创维－Rgb电子有限公司 | Adjusting circuit and method for module backlight lamp bar of television |
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