CN208508508U - A kind of power supply power supply protection circuit and its television set - Google Patents
A kind of power supply power supply protection circuit and its television set Download PDFInfo
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- CN208508508U CN208508508U CN201821170350.2U CN201821170350U CN208508508U CN 208508508 U CN208508508 U CN 208508508U CN 201821170350 U CN201821170350 U CN 201821170350U CN 208508508 U CN208508508 U CN 208508508U
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Abstract
The utility model discloses a kind of power supply power supply protection circuit and its television sets, the voltage of the second power supply output end is detected by setting voltage regulator circuit and the reference voltage signal of external offer is provided, output voltage adjustment signal is transferred to power-supplying circuit, to realize the adjustment of power-supplying circuit output voltage, meet the power demands of the LED backlight lamp bar of different number, over under-voltage protection circuit also is set in the first power supply output end rear end, power-supplying circuit output voltage over-voltage or it is under-voltage when power supply of the cutting to TV motherboard, to protect the route and electronic device safety of TV motherboard, from damage.
Description
Technical field
The utility model relates to TV set power power supply circuit, especially a kind of power supply power supply protection circuit and its TV
Machine.
Background technique
Currently, the power-supplying circuit of television set generally all separate duplex feeding output supply electricity to respectively TV motherboard and
LED backlight.But the different LED backlight lamp bar of quantity needs power-supplying circuit to provide different output voltages, and TV master
Plate needs more stable supply voltage then since electronic device and route are to the more demanding of supply voltage, voltage it is higher and
The lower damage that can all cause route and electronic device of voltage.Existing power-supplying circuit is in the number according to LED backlight lamp bar
When amount adjustment output pressure regulation, the supply voltage stability to TV motherboard can be influenced simultaneously, the two cannot be considered in terms of.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of power supply power supply protection circuit and its TVs
Machine, not only adjustable output voltage met the LED backlight lamp bar supply voltage demand of different number, but also can protect TV motherboard
It is safer from the influence of overvoltage or under-voltage.
The technical solution adopted by the utility model to solve the problem is as follows:
A kind of power supply power supply protection circuit, including power-supplying circuit, voltage regulator circuit and over under-voltage protection circuit,
In:
The power-supplying circuit includes for supplying electricity to the first power supply output end of TV motherboard, for supplying electricity to LED
Second power supply output end of backlight and the Voltage Feedback adjustable side for adjusting power-supplying circuit output voltage；
The voltage regulator circuit includes voltage sampling port, reference voltage input terminal and control voltage output end, the electricity
It presses the second power supply output end of sampling end connection and detects the voltage transmission of the second power supply output end to voltage regulator circuit, the ginseng
It examines voltage input end and connects the Voltage Feedback for receiving the reference voltage signal of external offer, the control voltage output end
The regulated voltage signal that voltage regulator circuit exports simultaneously is transferred to power-supplying circuit by adjustable side；
Over under-voltage protection circuit connection the first power supply output end, for over-voltage or it is under-voltage when cutting to electricity
Depending on the power supply of mainboard.
The voltage of the second power supply output end is detected by setting voltage regulator circuit and the reference voltage of external offer is provided
Signal, output voltage adjustment signal are transferred to power-supplying circuit, thus realize the adjustment of power-supplying circuit output voltage, it is full
Also over under-voltage protection circuit is arranged in the first power supply output end rear end in the power demands of the LED backlight lamp bar of sufficient different number,
The output voltage over-voltage of power-supplying circuit or it is under-voltage when power supply of the cutting to TV motherboard, to protect the line of TV motherboard
Road and electronic device safety, from damage.
Further, the voltage regulator circuit includes optocoupler, controllable voltage-stablizer, the reference for being connected to the controllable voltage-stablizer
Pressure stabilizing feed circuit between input terminal and cathode, the first resistor for providing sampled voltage and second resistance and for mentioning
The 3rd resistor of supply reference voltage, in which:
The optocoupler includes photophore and light-receiving device, and the anode of the photophore is connected to the voltage by the 4th resistance
Sampling end, the cathode of photophore are connected to the cathode of the controllable voltage-stablizer, the plus earth of controllable voltage-stablizer；The light-receiving device
Anode be connected to the control voltage output end, the cathode ground connection of light-receiving device；
The voltage sampling port connects one end of the first resistor, and the other end of first resistor connects the second resistance
One end, second resistance the other end ground connection, the reference input of the controllable voltage-stablizer be connected to first resistor and second electricity
At the tie point of resistance；
The reference voltage input terminal is connected at the tie point of first resistor and second resistance by 3rd resistor.
Further, the 5th resistance is connected between the anode and cathode of the photophore.
Further, the pressure stabilizing feed circuit includes first capacitor, the second capacitor and the 6th resistance, the first capacitor
One end is connected to the cathode of the controllable voltage-stablizer, and the other end connects one end of the 6th resistance, the other end of the 6th resistance
Connect the reference input of controllable voltage-stablizer；One end of second capacitor connects the cathode of controllable voltage-stablizer, other end connection
The reference input of controllable voltage-stablizer.
Further, the controllable voltage-stablizer uses the pressure stabilizing standard of model TL431.
Further, over under-voltage protection circuit includes bleeder circuit, over-voltage detection circuit, undervoltage detection circuit, protection control
Circuit and ON-OFF control circuit, in which:
The first power supply output end connects the input terminal of the ON-OFF control circuit, the output of the ON-OFF control circuit
End supplies electricity to TV motherboard；The input terminal of the bleeder circuit connects the output end of the ON-OFF control circuit, the partial pressure electricity
The output end on road is respectively connected to the input terminal of over-voltage detection circuit and undervoltage detection circuit, the over-voltage detection circuit and under-voltage
The output end of detection circuit is respectively connected to the input terminal of protection control circuit, protects and opens described in the output end connection of control circuit
The control terminal of control circuit is closed, protection control circuit controls institute according to the output signal of over-voltage detection circuit and undervoltage detection circuit
State the on-off of ON-OFF control circuit.
Further, the bleeder circuit includes the 7th resistance and the 8th resistance, and the output end of the ON-OFF control circuit connects
One end of the 7th resistance is connect, the other end of the 7th resistance connects one end of the 8th resistance, the other end ground connection of the 8th resistance；
The over-voltage detection circuit includes diode and the first triode, and the cathode of the diode connects the 7th resistance and the 8th electricity
At the tie point of resistance, the anode of the diode connects the base stage of first triode, the emitter of first triode
Ground connection, the collector of first triode connect the input terminal of the protection control circuit；The undervoltage detection circuit includes
One end of second triode, the 9th resistance and the tenth resistance, the 9th resistance is connected to the 7th resistance and the 8th resistance
Tie point at, the other end of the 9th resistance is connected to the base stage of second triode and one end of the tenth resistance,
The other end of ten resistance is grounded, and the collector of the second triode connects the input terminal of the protection control circuit, the second triode
Emitter ground connection.
Further, first triode is NPN type triode, and second triode is PNP type triode.
Further, the ON-OFF control circuit includes third transistor, eleventh resistor and twelfth resistor, the third
The emitter connection of triode the first power supply output end, the collector of third transistor supply electricity to TV motherboard, and described the
One end connection the first power supply output end of 11 resistance, the base stage of the other end connection third transistor of eleventh resistor are described
The output end of one end connection protection control circuit of twelfth resistor, the base of the other end connection third transistor of twelfth resistor
Pole.
Further, the third transistor is PNP type triode.
A kind of television set protects circuit including a kind of power supply power supply described above.
The beneficial effects of the utility model are: a kind of power supply power supply protection circuit and its TV that the utility model uses
Machine detects the voltage of the second power supply output end by setting voltage regulator circuit and receives the reference voltage signal of external offer,
Output voltage adjustment signal is transferred to power-supplying circuit, to realize the adjustment of power-supplying circuit output voltage, meets not
With the power demands of the LED backlight lamp bar of quantity, over under-voltage protection circuit also is set in the first power supply output end rear end, in power supply
The output voltage over-voltage of power supply circuit or it is under-voltage when power supply of the cutting to TV motherboard, thus protect TV motherboard route and
Electronic device safety, from damage.
Detailed description of the invention
The utility model is described in further detail with example with reference to the accompanying drawing.
Fig. 1 is the schematic block circuit diagram of a kind of power supply power supply protection circuit of the utility model and its television set；
Fig. 2 be the utility model voltage regulator circuit and circuit diagram；
Fig. 3 is the schematic block circuit diagram of the utility model over-and under-voltage protection circuit；
Fig. 4 is the circuit diagram of the utility model over-and under-voltage protection circuit.
Specific embodiment
Referring to Fig.1, a kind of power supply power supply of the utility model protects circuit, including power-supplying circuit 1, voltage to adjust electricity
Road 2 and over under-voltage protection circuit 3, in which:
The power-supplying circuit 1 includes for supplying electricity to the first power supply output end O1 of TV motherboard 10, for powering
The second power supply output end O2 to LED backlight 20 and the Voltage Feedback for adjusting 1 output voltage of power-supplying circuit are adjusted
Hold DYTJ；
The voltage regulator circuit 2 includes voltage sampling port CY, reference voltage input terminal CKDY and control voltage output end
KZSC, the power supply output end O2 of voltage sampling port CY connection second simultaneously detect the voltage transmission of the second power supply output end O2 to electricity
Voltage regulator circuit 2, the reference voltage input terminal CKDY are used to receive the reference voltage signal of external offer, the control voltage
Output end KZSC connects the Voltage Feedback adjustable side DYTJ and is transferred to the regulated voltage signal that voltage regulator circuit 2 exports
Power-supplying circuit 1；
The over under-voltage protection circuit 3 connect it is described first power supply output end O1, for over-voltage or it is under-voltage when cut off
Power supply to TV motherboard 10.
The voltage of the second power supply output end O2 is detected by setting voltage regulator circuit 2 and the reference electricity of external offer is provided
Signal is pressed, output voltage adjustment signal is transferred to power-supplying circuit 1, to realize the tune of 1 output voltage of power-supplying circuit
It is whole, meet the power demands of the LED backlight lamp bar of different number, is also protected in the first power supply rear end output end O1 setting overvoltage/undervoltage
Circuit 3, power-supplying circuit 1 output voltage over-voltage or it is under-voltage when power supply of the cutting to TV motherboard 10, to protect
Route and the electronic device safety of TV motherboard 10, from damage.
Referring to Fig. 2, the voltage regulator circuit 2 include optocoupler GDOH, controllable voltage-stablizer WYQ, be connected to it is described controllable steady
Pressure stabilizing feed circuit between the reference input and cathode of depressor WYQ, the first resistor R1 for providing sampled voltage and
Two resistance R2 and for providing the 3rd resistor R3 of reference voltage, in which: the optocoupler GDOH includes photophore and light-receiving device,
The anode of the photophore is connected to the voltage sampling port CY by the 4th resistance R4, the cathode of photophore be connected to it is described can
Control the cathode of voltage-stablizer WYQ, the plus earth of controllable voltage-stablizer WYQ；The anode of the light-receiving device is connected to the control voltage
Output end KZSC, the cathode ground connection of light-receiving device；The voltage sampling port CY connects one end of the first resistor R1, first resistor
The other end of R1 connects one end of the second resistance R2, and the other end of second resistance R2 is grounded, the controllable voltage-stablizer WYQ's
Reference input is connected at the tie point of first resistor R1 and second resistance R2；The reference voltage input terminal CKDY passes through the
Three resistance R3 are connected at the tie point of first resistor R1 and second resistance R2；It is connected between the anode and cathode of the photophore
There is the 5th resistance R5；The pressure stabilizing feed circuit includes first capacitor C1, the second capacitor C2 and the 6th resistance R6, first electricity
The one end for holding C1 is connected to the cathode of the controllable voltage-stablizer WYQ, and the other end connects one end of the 6th resistance R6, the 6th electricity
The other end of resistance R6 connects the reference input of controllable voltage-stablizer WYQ；One end of the second capacitor C2 connects controllable voltage-stablizer
The cathode of WYQ, the other end connect the reference input of controllable voltage-stablizer WYQ；The controllable voltage-stablizer WYQ uses model
The pressure stabilizing standard of TL431.
Specifically, the output voltage of the second power supply of voltage sampling port CY detection output end O2, as the second power supply output end O2
Output voltage when increasing, by the way that the voltage of acquisition is linked into controllable voltage-stablizer after first resistor R1 and second resistance R2 partial pressure
The voltage value of reference input is compared by the reference input of WYQ, controllable voltage-stablizer WYQ with its internal reference voltage.
When the voltage value of reference input is greater than the reference voltage of its inside, so that the voltage between controllable voltage-stablizer WYQ anode and cathode
It reduces, so that the electric current for the photophore for flowing through optocoupler GDOH be made to become larger, the dynamic electric resistor of light-receiving device reduces, and voltage is lower, thus
The level for being transferred to power-supplying circuit 1 from control voltage output end KZSC reduces, to make the output electricity of power-supplying circuit 1
Pressure drop is low.Similarly, when the voltage value of reference input is less than the reference voltage of its inside, power-supplying circuit 1 can be made
Output voltage increase.
Referring to Fig. 3, over under-voltage protection circuit 3 include bleeder circuit 31, over-voltage detection circuit 32, undervoltage detection circuit 33,
Protect control circuit 34 and ON-OFF control circuit 35, in which:
The first power supply output end O1 connects the input terminal of the ON-OFF control circuit 35, the ON-OFF control circuit 35
Output end supply electricity to TV motherboard 10；The input terminal of the bleeder circuit 31 connects the output of the ON-OFF control circuit 35
End, the output end of the bleeder circuit 31 are respectively connected to the input terminal of over-voltage detection circuit 32 and undervoltage detection circuit 33, institute
The output end for stating over-voltage detection circuit 32 and undervoltage detection circuit 33 is respectively connected to protect the input terminal of control circuit 34, protection
The output end of control circuit 34 connects the control terminal of the ON-OFF control circuit 35, and protection control circuit 34 detects electricity according to over-voltage
The output signal of road 32 and undervoltage detection circuit 33 controls the on-off of the ON-OFF control circuit 35.
Referring to Fig. 4, the bleeder circuit 31 includes the 7th resistance R7 and the 8th resistance R8, the ON-OFF control circuit 35
Output end connects one end of the 7th resistance R7, and the other end of the 7th resistance R7 connects one end of the 8th resistance R8, the 8th electricity
Hinder the other end ground connection of R8；The over-voltage detection circuit 32 includes diode D1 and the first triode Q1, the diode D1's
Cathode connects at the tie point of the 7th resistance R7 and the 8th resistance R8, and the anode of the diode D1 connects the one or three pole
The base stage of pipe Q1, the emitter ground connection of the first triode Q1, the collector of the first triode Q1 connect the protection
The input terminal of control circuit 34；The undervoltage detection circuit 33 includes the second triode Q2, the 9th resistance R9 and the tenth resistance
One end of R10, the 9th resistance R9 are connected at the tie point of the 7th resistance R7 and the 8th resistance R8, the 9th resistance R9
The other end be connected to the base stage of the second triode Q2 and one end of the tenth resistance R10, the tenth resistance R10's is another
End ground connection, the collector of the second triode Q2 connect the input terminal of the protection control circuit 34, the transmitting of the second triode Q2
Pole ground connection；The first triode Q1 is NPN type triode, and the second triode Q2 is PNP type triode；The switch control
Circuit 35 processed includes third transistor Q3, eleventh resistor R11 and twelfth resistor R12, the transmitting of the third transistor Q3
Pole connection the first power supply output end O1, the collector of third transistor Q3 supply electricity to TV motherboard 10, the 11st electricity
The base stage of the other end connection third transistor Q3 of the first power supply of one end connection the output end O1, eleventh resistor R11 of R11 are hindered,
The output end of one end connection protection control circuit 34 of the twelfth resistor R12, the other end connection the of twelfth resistor R12
The base stage of three triode Q3；The third transistor Q3 is PNP type triode.
Specifically, the 7th resistance R7 and the 8th resistance R8 are connected between the output end and ground terminal of ON-OFF control circuit 35,
Over-voltage detection circuit 32 and undervoltage detection circuit 33 are transferred to after the output voltage of ON-OFF control circuit 35 is divided.When owing
When pressure, diode D1 is unable to reach breakdown conducting voltage, therefore the first triode Q1 does not have voltage input, and the first triode Q1 is cut
Only；And the 9th resistance R9 and the tenth resistance R10 partial pressure is transferred to the base stage of the second triode Q2, the second triode Q2 is connected, from
And export under-voltage control signal and give protection control circuit 34, control signal is exported by protection control circuit 34 and controls third transistor
Q3 cut-off, stops power supply to TV motherboard 10.When there is over-voltage, the 9th resistance R9 and the tenth resistance R10 partial pressure is excessively high makes the
Two triode Q2 cut-off；And diode D1 reaches breakdown conducting voltage, diode D1 breakdown conducting, the first triode Q1 is triggered
Conducting exports control signal control the by protection control circuit 34 so that output overvoltage control signal gives protection control circuit 34
Three triode Q3 cut-off, stops power supply to TV motherboard 10.Wherein the utility model does not provide the tool of protection control circuit 34
Body realizes circuit, but the function of protecting control circuit 34 to realize is relatively simple, and those skilled in the art are not paying creative labor
Numerous embodiments can be obtained easily in the case where dynamic, therefore are no longer provided separately.
The utility model also provides a kind of television set, protects circuit including a kind of power supply power supply described above.
The above, the only preferred embodiment of the utility model, the utility model are not limited to above-mentioned implementation
Mode, as long as its technical effect for reaching the utility model with identical means, all should belong to the protection scope of the utility model.
Claims (10)
1. a kind of power supply power supply protects circuit, which is characterized in that including power-supplying circuit (1), voltage regulator circuit (2) and mistake
Under-voltage protecting circuit (3), in which:
The power-supplying circuit (1) includes for supplying electricity to the first power supply output end (O1) of TV motherboard (10), for supplying
The second power supply output end (O2) for supplying electricity to LED backlight (20) and the voltage for adjusting power-supplying circuit (1) output voltage
Feedback regulation end (DYTJ)；
The voltage regulator circuit (2) includes voltage sampling port (CY), reference voltage input terminal (CKDY) and control voltage output
It holds (KZSC), second power supply output end (O2) of voltage sampling port (CY) connection and the electricity for detecting the second power supply output end (O2)
Pressure is transferred to voltage regulator circuit (2), and the reference voltage input terminal (CKDY) is used to receive the reference voltage letter of external offer
Number, the control voltage output end (KZSC) connects the Voltage Feedback adjustable side (DYTJ) and voltage regulator circuit (2) is defeated
Regulated voltage signal out is transferred to power-supplying circuit (1)；
The over under-voltage protection circuit (3) connection first power supply output end (O1), for over-voltage or it is under-voltage when cut off
Power supply to TV motherboard (10).
2. a kind of power supply power supply according to claim 1 protects circuit, which is characterized in that the voltage regulator circuit (2)
Including optocoupler (GDOH), controllable voltage-stablizer (WYQ), the reference input for being connected to the controllable voltage-stablizer (WYQ) and cathode it
Between pressure stabilizing feed circuit, the first resistor (R1) for providing sampled voltage and second resistance (R2) and for providing reference
The 3rd resistor (R3) of voltage, in which:
The optocoupler (GDOH) includes photophore and light-receiving device, and the anode of the photophore is connected to institute by the 4th resistance (R4)
It states voltage sampling port (CY), the cathode of photophore is connected to the cathode of the controllable voltage-stablizer (WYQ), controllable voltage-stablizer (WYQ)
Plus earth；The anode of the light-receiving device is connected to the control voltage output end (KZSC), the cathode ground connection of light-receiving device；
The voltage sampling port (CY) connects one end of the first resistor (R1), described in the other end connection of first resistor (R1)
One end of second resistance (R2), the other end ground connection of second resistance (R2), the reference input of the controllable voltage-stablizer (WYQ) connect
It is connected at the tie point of first resistor (R1) and second resistance (R2)；
The reference voltage input terminal (CKDY) is connected to first resistor (R1) and second resistance (R2) by 3rd resistor (R3)
Tie point at.
3. a kind of power supply power supply according to claim 2 protects circuit, which is characterized in that the anode of the photophore and negative
The 5th resistance (R5) is connected between pole.
4. a kind of power supply power supply according to claim 2 protects circuit, which is characterized in that the pressure stabilizing feed circuit includes
First capacitor (C1), the second capacitor (C2) and the 6th resistance (R6), one end of the first capacitor (C1) are connected to described controllable
The cathode of voltage-stablizer (WYQ), the other end connect one end of the 6th resistance (R6), and the other end connection of the 6th resistance (R6) can
Control the reference input of voltage-stablizer (WYQ)；One end of second capacitor (C2) connects the cathode of controllable voltage-stablizer (WYQ), separately
One end connects the reference input of controllable voltage-stablizer (WYQ).
5. a kind of power supply power supply according to claim 2 protects circuit, which is characterized in that the controllable voltage-stablizer (WYQ)
Using the pressure stabilizing standard of model TL431.
6. a kind of power supply power supply according to claim 1 protects circuit, which is characterized in that over under-voltage protection circuit (3) packet
Include bleeder circuit (31), over-voltage detection circuit (32), undervoltage detection circuit (33), protection control circuit (34) and switch control electricity
Road (35), in which:
First power supply output end (O1) connects the input terminal of the ON-OFF control circuit (35), the ON-OFF control circuit
(35) output end supplies electricity to TV motherboard (10)；
The input terminal of the bleeder circuit (31) connects the output end of the ON-OFF control circuit (35), the bleeder circuit (31)
Output end be respectively connected to the input terminal of over-voltage detection circuit (32) and undervoltage detection circuit (33), the over-voltage detection circuit
(32) and the output end of undervoltage detection circuit (33) is respectively connected to protect the input terminal of control circuit (34), protects control circuit
(34) output end connects the control terminal of the ON-OFF control circuit (35), protects control circuit (34) according to over-voltage detection circuit
(32) and the output signal of undervoltage detection circuit (33) controls the on-off of the ON-OFF control circuit (35).
7. a kind of power supply power supply according to claim 6 protects circuit, which is characterized in that the bleeder circuit (31) includes
The output end of 7th resistance (R7) and the 8th resistance (R8), the ON-OFF control circuit (35) connects the 7th resistance (R7)
One end, the other end of the 7th resistance (R7) connect one end of the 8th resistance (R8), the other end ground connection of the 8th resistance (R8)；It is described
Over-voltage detection circuit (32) includes diode (D1) and the first triode (Q1), and the cathode of the diode (D1) connects the described 7th
At the tie point of resistance (R7) and the 8th resistance (R8), the anode of the diode (D1) connects first triode (Q1)
Base stage, the emitter ground connection of first triode (Q1), the collector of first triode (Q1) connect the protection control
The input terminal of circuit (34) processed；The undervoltage detection circuit (33) includes the second triode (Q2), the 9th resistance (R9) and the tenth
One end of resistance (R10), the 9th resistance (R9) is connected to the tie point of the 7th resistance (R7) and the 8th resistance (R8)
Place, the other end of the 9th resistance (R9) be connected to second triode (Q2) base stage and the tenth resistance (R10) one
End, the other end ground connection of the tenth resistance (R10), collector connection protection control circuit (34) of the second triode (Q2)
Input terminal, the emitter ground connection of the second triode (Q2).
8. a kind of power supply power supply according to claim 7 protects circuit, which is characterized in that first triode (Q1) is
NPN type triode, second triode (Q2) are PNP type triode.
9. a kind of power supply power supply according to claim 6 protects circuit, which is characterized in that the ON-OFF control circuit (35)
Including third transistor (Q3), eleventh resistor (R11) and twelfth resistor (R12), the transmitting of the third transistor (Q3)
Pole connection first power supply output end (O1), the collector of third transistor (Q3) supplies electricity to TV motherboard (10), and described the
The first power supply output end (O1) of one end connection of 11 resistance (R11), the other end of eleventh resistor (R11) connect the three or three pole
Manage the base stage of (Q3), the output end of one end connection protection control circuit (34) of the twelfth resistor (R12), twelfth resistor
(R12) base stage of other end connection third transistor (Q3)；The third transistor (Q3) is PNP type triode.
10. a kind of television set, which is characterized in that protect circuit including a kind of any power supply power supply of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821170350.2U CN208508508U (en) | 2018-07-23 | 2018-07-23 | A kind of power supply power supply protection circuit and its television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821170350.2U CN208508508U (en) | 2018-07-23 | 2018-07-23 | A kind of power supply power supply protection circuit and its television set |
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| Publication Number | Publication Date |
|---|---|
| CN208508508U true CN208508508U (en) | 2019-02-15 |
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ID=65291123
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821170350.2U Expired - Fee Related CN208508508U (en) | 2018-07-23 | 2018-07-23 | A kind of power supply power supply protection circuit and its television set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396453A (en) * | 2019-11-22 | 2021-09-14 | 京东方科技集团股份有限公司 | Backlight control circuit, driving method thereof, backlight module and display device |
-
2018
- 2018-07-23 CN CN201821170350.2U patent/CN208508508U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396453A (en) * | 2019-11-22 | 2021-09-14 | 京东方科技集团股份有限公司 | Backlight control circuit, driving method thereof, backlight module and display device |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 Termination date: 20200723 |