CN203289546U - Power supply standby circuit and LED (light-emitting diode) liquid crystal display television - Google Patents
Power supply standby circuit and LED (light-emitting diode) liquid crystal display television Download PDFInfo
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- CN203289546U CN203289546U CN2013202536599U CN201320253659U CN203289546U CN 203289546 U CN203289546 U CN 203289546U CN 2013202536599 U CN2013202536599 U CN 2013202536599U CN 201320253659 U CN201320253659 U CN 201320253659U CN 203289546 U CN203289546 U CN 203289546U
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Abstract
The utility model belongs to the field of circuits, and provides a power supply standby circuit and an LED (light-emitting diode) liquid crystal display television. The power supply standby circuit is connected with a mains supply, and comprises a microprocessor and a power supply, wherein the power supply comprises a first output end for outputting a 12 V voltage and a second output end for outputting a 24 V voltage. The power supply standby circuit further comprises a first energy-saving module connected with the microprocessor and the first output end respectively, and used for cutting off the output voltage of the first output end in a standby state. In the power supply standby circuit and the LED liquid crystal display television disclosed by the utility model, when the power supply is in the standby state, the voltage output by the first output end is cut off via the first energy-saving module, thus the power supply is more energy-saving in the standby state, and the problem of electric energy loss and waste caused by the voltage output in the standby state is avoided.
Description
Technical field
The utility model belongs to circuit field, relates in particular to a kind of power standby circuit and LED LCD TV.
Background technology
Society is conservation-minded society, and environmental protection, energy-conservation green power supply are more and more advocated and accept by society.Therefore, energy-conservation is an eternal theme of power source development, and visible power supply, from continuous " optimization ", needs constantly from the details aspect, to reduce meaningless energy loss.
Adopt during standby special stand-by circuit output 5V to microprocessor in traditional power supply, provide a high level ON/OFF to electric power main circuit by microprocessor again, thereby power supply just can be exported 12V, two groups of voltages of 24V, in the whole set of television of some middle low powers, often adopt independent single-ended circuit of reversed excitation can meet the needs of power, that is to say, one indirect current, 5V is just arranged, 12V, 24V Voltage-output, though this power supply architecture cost, when standby, also have certain " load " consuming electric energy in the back of 12V, 24V.
The utility model content
The utility model provides a kind of power standby electric current, is intended to solve and adopts the power circuit of independent single-ended reverse exciting to reduce the problem of electric energy loss when standby.
In order to solve the problems of the technologies described above, the utility model is achieved in that a kind of power standby circuit, be electrically connected to city, described power standby circuit comprises microprocessor and power supply, described power supply comprises the first output of output 12V voltage and the second output of output 24V voltage, and described power standby circuit also comprises:
With described microprocessor be connected the first output and the second output and be connected, have the first energy-conservation output, cut off the first energy-saving module of the output voltage of described the first output when standby.
Further, described the first energy-saving module comprises:
With described microprocessor be connected the first output and be connected, control the voltage turn-on of described the first output output or the first output control unit of cut-off;
With described the first output control unit be connected the first output and described the second output and be connected, regulate the voltage of described the first output output and the first feedback unit that feeds back.
Further, described the first output control unit comprises:
Resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, capacitor C 1, capacitor C 2, NPN type triode Q1, P type metal-oxide-semiconductor Q2, diode D1;
the anode of described diode D1 is connected with the ON/OFF holding wire of described microprocessor, the first end of described resistance R 1 is connected with the negative electrode of described diode D1, the second end of described resistance R 1 respectively with the first end of described resistance R 2, the base stage of the first end of described capacitor C 1 and described NPN type triode Q1 connects, the emitter of the second end of described resistance R 2 and the second end of described capacitor C 1 and described NPN type triode Q1 is connected to ground altogether, the first end of described resistance R 3 is connected with the collector electrode of described NPN type triode Q1, the second end of described resistance R 3 respectively with the first end of described resistance R 4, the first end of described capacitor C 2, the grid of the first end of described resistance R 5 and described P type metal-oxide-semiconductor Q2 connects, the second end of described resistance R 4 and the second end of described capacitor C 2 are connected to ground altogether, the second end of described resistance R 5 be connected the source electrode of P type metal-oxide-semiconductor Q2 and be connected with described the first output respectively, described P type metal-oxide-semiconductor Q2 drain electrode be the first energy-conservation output of described the first energy-saving module.
Further, described the first feedback unit comprises:
Resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, capacitor C 3, capacitor C 4, NPN type triode Q3, adjustable shunt regulator ZD1, photoelectrical coupler U1;
the first end of described resistance R 6 is connected with the negative electrode of described diode D1, the second end of described resistance R 6 respectively with the first end of described resistance R 7, the base stage of the first end of described capacitor C 3 and described NPN type triode Q3 connects, the second end of described resistance R 7 and the second end of described capacitor C 3, the emitter of described NPN type triode Q3, the second end of described resistance R 8 and the first end of described adjustable shunt regulator ZD1 are connected to ground altogether, the collector electrode of described NPN type triode Q3 respectively with the first end of described resistance R 8 be connected the first end of resistance R 9 and be connected, the second end of described resistance R 9 respectively with the second end of described resistance R 10, the second end of described resistance R 11, the 3rd end of described adjustable shunt regulator ZD1 and the first end of described capacitor C 4 connect, described the first output of the first termination of described resistance R 10, described the second output of the first termination of described resistance R 11, the second end of described capacitor C 4 respectively with the second end of described adjustable shunt regulator ZD1 be connected the second end of photoelectrical coupler U1 and be connected, the second end of described photoelectrical coupler U1 is connected with described the first output.
Further, described power standby circuit also comprises:
With described microprocessor be connected the first output and described the second output and be connected, have the second energy-conservation output, cut off the second energy-saving module of the output voltage of described the second output when standby.
Further, described the second energy-saving module comprises:
With described microprocessor be connected the first output and be connected, control the voltage turn-on of described the first output output or the second output control unit of cut-off;
With described the second output control unit be connected the first output and described the second output and be connected, regulate the voltage of described the second output output and the second feedback unit that feeds back.
Further, described the second output control unit comprises:
Resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 5, capacitor C 6, NPN type triode Q4, P type metal-oxide-semiconductor Q5, diode D2;
the anode of described diode D2 is connected with the ON/OFF holding wire of described microprocessor, the first end of described resistance R 12 is connected with the negative electrode of described diode D2, the second end of described resistance R 12 respectively with the first end of described resistance R 13, the base stage of the first end of described capacitor C 5 and described NPN type triode Q4 connects, the emitter of the second end of described resistance R 13 and the second end of described capacitor C 5 and described NPN type triode Q4 is connected to ground altogether, the first end of described resistance R 14 is connected with the collector electrode of described NPN type triode Q4, the second end of described resistance R 14 respectively with the first end of described resistance R 15, the first end of described capacitor C 6, the grid of the first end of described resistance R 16 and described P type metal-oxide-semiconductor Q5 connects, the second end of described resistance R 15 and the second end of described capacitor C 6 are connected to ground altogether, the second end of described resistance R 16 be connected the source electrode of P type metal-oxide-semiconductor Q5 and be connected with described the second output respectively, described P type metal-oxide-semiconductor Q5 drain electrode be the second energy-conservation output of described the second energy-saving module.
Further, described the second feedback unit comprises:
Resistance R 17, resistance R 18, resistance R 19, resistance R 20, resistance R 21, resistance R 22, capacitor C 7, capacitor C 8, NPN type triode Q6, adjustable shunt regulator ZD2, photoelectrical coupler U2;
the first end of described resistance R 17 is connected with the negative electrode of described diode D1, the second end of described resistance R 17 respectively with the first end of described resistance R 18, the base stage of the first end of described capacitor C 7 and described NPN type triode Q6 connects, the second end of described resistance R 18 and the second end of described capacitor C 7, the emitter of described NPN type triode Q6, the second end of described resistance R 19 and the first end of described adjustable shunt regulator ZD2 are connected to ground altogether, the collector electrode of described NPN type triode Q6 respectively with the first end of described resistance R 19 be connected the first end of resistance R 20 and be connected, the second end of described resistance R 20 respectively with the second end of described resistance R 21, the second end of described resistance R 22, the 3rd end of described adjustable shunt regulator ZD2 and the first end of described capacitor C 8 connect, described the first output of the first termination of described resistance R 21, described the second output of the first termination of described resistance R 22, the second end of described capacitor C 8 respectively with the second end of described adjustable shunt regulator ZD2 be connected the second end of photoelectrical coupler U2 and be connected, the second end of described photoelectrical coupler U2 is connected with described the second output.
The utility model also provides a kind of LED LCD TV, and described LED LCD TV comprises power standby circuit as above.
In the utility model, power supply cuts off the voltage of the first output output by the first energy-saving module when standby, can make power supply more energy-conservation when standby, avoids also having Voltage-output when standby, causes the problem of electric energy loss waste.
Description of drawings
Fig. 1 is the modular structure figure of the power standby circuit that provides of the utility model the first embodiment;
Fig. 2 is the electric current structure chart of the power standby circuit that provides of the utility model the first embodiment;
Fig. 3 is the modular structure figure of the power standby circuit that provides of the utility model the second embodiment;
Fig. 4 is the electric current structure chart of the power standby circuit that provides of the utility model the second embodiment.
Embodiment
, in order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Below in conjunction with specific embodiment, specific implementation of the present utility model is described in detail:
Embodiment one:
Fig. 1 shows the power standby circuit that the utility model the first embodiment provides, and for convenience of explanation, the present embodiment is only enumerated the part relevant to the first embodiment, and details are as follows:
Power standby circuit 200 is connected with civil power AC, comprises microprocessor 100 and power supply 201, and power supply 201 comprises the first output end p 1 of output 12V voltage and the second output end p 2 of output 24V voltage, and power standby circuit 200 also comprises:
Respectively with microprocessor 100 be connected output end p 1 and the second output end p 2 and be connected, have the first energy-conservation output end p p1, cut off the first energy-saving module 202 of the output voltage of the first output end p 1 when standby.
As the utility model one embodiment, the first energy-saving module 202 comprises:
With microprocessor 100 be connected output end p 1 and be connected, control the voltage turn-on of the first output end p 1 output or the first output control unit 2021 of cut-off;
With the first output control unit 2021 be connected output end p 1 and the second output end p 2 and be connected, regulate the voltage of the first output end p 1 output and the first feedback unit 2022 that feeds back.
As shown in Figure 2, as the utility model one embodiment, the first output control unit 2021 comprises:
Resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, capacitor C 1, capacitor C 2, NPN type triode Q1, P type metal-oxide-semiconductor Q2, diode D1;
the anode of diode D1 is connected with the ON/OFF holding wire of microprocessor 100, the first end of resistance R 1 is connected with the negative electrode of diode D1, the second end of resistance R 1 respectively with the first end of resistance R 2, the base stage of the first end of capacitor C 1 and NPN type triode Q1 connects, the emitter of the second end of resistance R 2 and the second end of capacitor C 1 and NPN type triode Q1 is connected to ground altogether, the first end of resistance R 3 is connected with the collector electrode of NPN type triode Q1, the second end of resistance R 3 respectively with the first end of resistance R 4, the first end of capacitor C 2, the grid of the first end of resistance R 5 and P type metal-oxide-semiconductor Q2 connects, the second end of resistance R 4 and the second end of capacitor C 2 are connected to ground altogether, the second end of resistance R 5 is connected source electrode and is connected with the first output respectively with P type metal-oxide-semiconductor Q2, P type metal-oxide-semiconductor Q2 drain electrode be the first energy-conservation output end p p1 of the first energy-saving module 202.
As the utility model one embodiment, the first feedback unit 2022 comprises:
Resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, capacitor C 3, capacitor C 4, NPN type triode Q3, adjustable shunt regulator ZD1, photoelectrical coupler U1;
the first end of resistance R 6 is connected with the negative electrode of diode D1, the second end of resistance R 6 respectively with the first end of resistance R 7, the base stage of the first end of capacitor C 3 and NPN type triode Q3 connects, the second end of resistance R 7 and the second end of capacitor C 3, the emitter of NPN type triode Q3, the second end of resistance R 8 and the first end 1 of adjustable shunt regulator ZD1 are connected to ground altogether, the collector electrode of NPN type triode Q3 is connected with the first end that the first end of resistance R 8 is connected with resistance R respectively, the second end of resistance R 9 respectively with the second end of resistance R 10, the second end of resistance R 11, the 3rd end 3 of adjustable shunt regulator ZD1 and the first end of capacitor C 4 connect, first termination the first output of resistance R 10, first termination the second output of resistance R 11, the second end of capacitor C 4 is connected the second end 2 with the second end 2 of adjustable shunt regulator ZD1 respectively and is connected with photoelectrical coupler U1, the second end 2 of photoelectrical coupler U1 is connected with the first output end p 1.
The technical scheme that below provides with the utility model the first embodiment describes the operation principle of power standby circuit 200.
When the voltage that (one) when the ON/OFF of microprocessor 100 holding wire, provides is high level (during power supply 201 normal power supply):
(1), in the first feedback unit 2022, NPN type triode Q3 forward conduction, and the current collection of NPN type triode Q3 is low level 0V very, electric current is through the Collector Emitter of NPN type triode Q3 and the ground that arrives, the 24V voltage of the 12V voltage of the first output end p 1 output and the second output end p 2 outputs is through resistance R 10, resistance R 11 and NPN type triode Q3 form loop, be sent to the phototriode of photoelectrical coupler U1 by the light-emitting diode of adjustable shunt regulator ZD1 and photoelectrical coupler U1, make the voltage constant of emitter output of phototriode of photoelectrical coupler U1 constant.
(2), in the first output control unit 2021, the voltage of diode D1 negative electrode is after resistance R 1 and resistance R 2 dividing potential drops, through capacitor C 2 filtering, the base stage forward conduction of NPN type triode Q1, the current collection of NPN type triode Q1 is low level 0V very, electric current through NPN type triode Q1 Collector Emitter and the ground that arrives, the 12V voltage of the first output end p 1 output is after resistance R 5 and resistance R 3 and resistance R 4 dividing potential drops, through capacitor C 2 filtering, make P type metal-oxide-semiconductor Q2 conducting, the Voltage-output that 12V is arranged in the drain electrode of P type metal-oxide-semiconductor Q2, namely when power supply 201 normal power supply, the first energy-saving module 202 can not affect the voltage of power supply 201 outputs.
When the voltage that (two) when the ON/OFF of microprocessor 100 holding wire, provides is low level (during power supply 201 holding state):
(1), in the first feedback unit 2022, the base stage of NPN type triode Q3 is that 0V oppositely ends, the current collection of NPN type triode Q3 very the electric current of high level and output through R8 and resistance R 9 to ground, the 24V voltage of the 12V voltage of the first output end p 1 output and the second output end p 2 outputs is through resistance R 10, resistance R 11 and resistance R 8, resistance R 9 forms loop, the resistance of putting below resistance R 8 and resistance R 9 series connection of this loop increases, the 24V voltage of the 12V voltage of the first output end p 1 output and the second output end p 2 outputs just reduces, be sent to the phototriode of photoelectrical coupler U1 by the light-emitting diode of adjustable shunt regulator ZD1 and photoelectrical coupler U1, make the voltage constant of emitter output of phototriode of photoelectrical coupler U1 constant.
(2), in the first output control unit 2021, the voltage of diode D1 negative electrode is after resistance R 1 and resistance R 2 dividing potential drops, through capacitor C 1 filtering, the base voltage of NPN type triode Q1 is that 0V oppositely ends, the current collection of NPN type triode Q1 very high level and electric current through R4 to ground, the 12V voltage of the first output end p 1 output is after resistance R 5 and resistance R 3 and resistance R 4 dividing potential drops, through capacitor C 2 filtering, the voltage that obtains at the grid of P type metal-oxide-semiconductor Q2 approximates the voltage of P type metal-oxide-semiconductor Q2 source electrode, P type metal-oxide-semiconductor Q2 can't conducting, the Voltage-output that just there is no 12V in the drain electrode of P type metal-oxide-semiconductor Q2.Namely when power supply 201 standby, the first energy-saving module 202 cuts off the 12V voltage that the first output end p 1 is exported.And the second output end p 2 is exported the voltage of 24V as usual due to energy-saving module not being set when power supply 201 standby.
Embodiment two:
Fig. 3 shows the power standby circuit that the utility model the second embodiment provides, and for convenience of explanation, the present embodiment is only enumerated the part relevant to the second embodiment, and details are as follows:
As the utility model one embodiment, power standby circuit 200 also comprises:
With microprocessor 100 be connected output end p 1 and the second output end p 2 and be connected, have the second energy-conservation output end p p2, cut off the second energy-saving module 203 of the output voltage of the second output end p 2 when standby.
As the utility model one embodiment, the second energy-saving module 203 comprises:
With microprocessor 100 be connected output end p 2 and be connected, control the voltage turn-on of the second output end p 2 outputs or the second output control unit 2031 of cut-off;
With the second output control unit 2031 be connected output end p 1 and the second output end p 2 and be connected, regulate the voltage of the second output end p 2 outputs and the first feedback unit 2022 that feeds back.
As the utility model one embodiment, the second output control unit 2031 comprises:
Resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 5, capacitor C 6, NPN type triode Q4, P type metal-oxide-semiconductor Q5, diode D2;
the anode of diode D2 is connected with the ON/OFF holding wire of microprocessor 100, the first end of resistance R 12 is connected with the negative electrode of diode D2, the second end of resistance R 12 respectively with the first end of resistance R 13, the base stage of the first end of capacitor C 5 and NPN type triode Q4 connects, the emitter of the second end of resistance R 13 and the second end of capacitor C 5 and NPN type triode Q4 is connected to ground altogether, the first end of resistance R 14 is connected with the collector electrode of NPN type triode Q4, the second end of resistance R 14 respectively with the first end of resistance R 15, the first end of capacitor C 6, the grid of the first end of resistance R 16 and P type metal-oxide-semiconductor Q5 connects, the second end of resistance R 15 and the second end of capacitor C 6 are connected to ground altogether, the second end of resistance R 16 is connected source electrode and is connected with the second output respectively with P type metal-oxide-semiconductor Q5, P type metal-oxide-semiconductor Q5 drain electrode be the second energy-conservation output end p p2 of the second energy-saving module 203.
As the utility model one embodiment, the second feedback unit 2032 comprises:
Resistance R 17, resistance R 18, resistance R 19, resistance R 20, resistance R 21, resistance R 22, capacitor C 7, capacitor C 8, NPN type triode Q6, adjustable shunt regulator ZD2 photoelectrical coupler U2;
the first end of resistance R 17 is connected with the negative electrode of diode D1, the second end of resistance R 17 respectively with the first end of resistance R 18, the base stage of the first end of capacitor C 7 and NPN type triode Q6 connects, the second end of resistance R 18 and the second end of capacitor C 7, the emitter of NPN type triode Q6, the second end of resistance R 19 and the first end 1 of adjustable shunt regulator ZD2 are connected to ground altogether, the collector electrode of NPN type triode Q6 is connected with the first end that the first end of resistance R 19 is connected with resistance R respectively, the second end of resistance R 20 respectively with the second end of resistance R 21, the second end of resistance R 22, the 3rd end 3 of adjustable shunt regulator ZD2 and the first end of capacitor C 8 connect, first termination the first output of resistance R 21, first termination the second output of resistance R 22, the second end of capacitor C 8 is connected the second end 2 with the second end 2 of adjustable shunt regulator ZD2 respectively and is connected with photoelectrical coupler U2, the second end 2 of photoelectrical coupler U2 is connected with the second output end p 2.
In the utility model the first and second embodiment, the first energy-saving module 202 is identical with the circuit structure that the second energy-saving module 203 adopts, and just the specification of components and parts is different, in order to control respectively the output voltage of 12V and the output voltage of 24V, its operation principle is identical, just no longer describes here.
The utility model also provides a kind of LED LCD TV, and the LED LCD TV comprises power standby circuit as above.
In the utility model embodiment, power supply cuts off the voltage of the first output output by the first energy-saving module when standby, can make power supply more energy-conservation when standby, avoids also having Voltage-output when standby, causes the problem of electric energy loss waste.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (9)
1. power standby circuit, be electrically connected to city, described power standby circuit comprises microprocessor and power supply, and described power supply comprises the first output of output 12V voltage and the second output of output 24V voltage, it is characterized in that, described power standby circuit also comprises:
With described microprocessor be connected the first output and the second output and be connected, have the first energy-conservation output, cut off the first energy-saving module of the output voltage of described the first output when standby.
2. power standby circuit as claimed in claim 1, is characterized in that, described the first energy-saving module comprises:
With described microprocessor be connected the first output and be connected, control the voltage turn-on of described the first output output or the first output control unit of cut-off;
With described the first output control unit be connected the first output and described the second output and be connected, regulate the voltage of described the first output output and the first feedback unit that feeds back.
3. power standby circuit as claimed in claim 2, is characterized in that, described the first output control unit comprises:
Resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, capacitor C 1, capacitor C 2, NPN type triode Q1, P type metal-oxide-semiconductor Q2, diode D1;
the anode of described diode D1 is connected with the ON/OFF holding wire of described microprocessor, the first end of described resistance R 1 is connected with the negative electrode of described diode D1, the second end of described resistance R 1 respectively with the first end of described resistance R 2, the base stage of the first end of described capacitor C 1 and described NPN type triode Q1 connects, the emitter of the second end of described resistance R 2 and the second end of described capacitor C 1 and described NPN type triode Q1 is connected to ground altogether, the first end of described resistance R 3 is connected with the collector electrode of described NPN type triode Q1, the second end of described resistance R 3 respectively with the first end of described resistance R 4, the first end of described capacitor C 2, the grid of the first end of described resistance R 5 and described P type metal-oxide-semiconductor Q2 connects, the second end of described resistance R 4 and the second end of described capacitor C 2 are connected to ground altogether, the second end of described resistance R 5 be connected the source electrode of P type metal-oxide-semiconductor Q2 and be connected with described the first output respectively, described P type metal-oxide-semiconductor Q2 drain electrode be the first energy-conservation output of described the first energy-saving module.
4. power standby circuit as claimed in claim 3, is characterized in that, described the first feedback unit comprises:
Resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, capacitor C 3, capacitor C 4, NPN type triode Q3, adjustable shunt regulator ZD1, photoelectrical coupler U1;
the first end of described resistance R 6 is connected with the negative electrode of described diode D1, the second end of described resistance R 6 respectively with the first end of described resistance R 7, the base stage of the first end of described capacitor C 3 and described NPN type triode Q3 connects, the second end of described resistance R 7 and the second end of described capacitor C 3, the emitter of described NPN type triode Q3, the second end of described resistance R 8 and the first end of described adjustable shunt regulator ZD1 are connected to ground altogether, the collector electrode of described NPN type triode Q3 respectively with the first end of described resistance R 8 be connected the first end of resistance R 9 and be connected, the second end of described resistance R 9 respectively with the second end of described resistance R 10, the second end of described resistance R 11, the 3rd end of described adjustable shunt regulator ZD1 and the first end of described capacitor C 4 connect, described the first output of the first termination of described resistance R 10, described the second output of the first termination of described resistance R 11, the second end of described capacitor C 4 respectively with the second end of described adjustable shunt regulator ZD1 be connected the second end of photoelectrical coupler U1 and be connected, the second end of described photoelectrical coupler U1 is connected with described the first output.
5. power standby circuit as claimed in claim 1, is characterized in that, described power standby circuit also comprises:
With described microprocessor be connected the first output and described the second output and be connected, have the second energy-conservation output, cut off the second energy-saving module of the output voltage of described the second output when standby.
6. power standby circuit as claimed in claim 5, is characterized in that, described the second energy-saving module comprises:
With described microprocessor be connected the first output and be connected, control the voltage turn-on of described the first output output or the second output control unit of cut-off;
With described the second output control unit be connected the first output and described the second output and be connected, regulate the voltage of described the second output output and the second feedback unit that feeds back.
7. power standby circuit as claimed in claim 6, is characterized in that, described the second output control unit comprises:
Resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 5, capacitor C 6, NPN type triode Q4, P type metal-oxide-semiconductor Q5, diode D2;
the anode of described diode D2 is connected with the ON/OFF holding wire of described microprocessor, the first end of described resistance R 12 is connected with the negative electrode of described diode D2, the second end of described resistance R 12 respectively with the first end of described resistance R 13, the base stage of the first end of described capacitor C 5 and described NPN type triode Q4 connects, the emitter of the second end of described resistance R 13 and the second end of described capacitor C 5 and described NPN type triode Q4 is connected to ground altogether, the first end of described resistance R 14 is connected with the collector electrode of described NPN type triode Q4, the second end of described resistance R 14 respectively with the first end of described resistance R 15, the first end of described capacitor C 6, the grid of the first end of described resistance R 16 and described P type metal-oxide-semiconductor Q5 connects, the second end of described resistance R 15 and the second end of described capacitor C 6 are connected to ground altogether, the second end of described resistance R 16 be connected the source electrode of P type metal-oxide-semiconductor Q5 and be connected with described the second output respectively, described P type metal-oxide-semiconductor Q5 drain electrode be the second energy-conservation output of described the second energy-saving module.
8. power standby circuit as claimed in claim 7, is characterized in that, described the second feedback unit comprises:
Resistance R 17, resistance R 18, resistance R 19, resistance R 20, resistance R 21, resistance R 22, capacitor C 7, capacitor C 8, NPN type triode Q6, adjustable shunt regulator ZD2, photoelectrical coupler U2;
the first end of described resistance R 17 is connected with the negative electrode of described diode D1, the second end of described resistance R 17 respectively with the first end of described resistance R 18, the base stage of the first end of described capacitor C 7 and described NPN type triode Q6 connects, the second end of described resistance R 18 and the second end of described capacitor C 7, the emitter of described NPN type triode Q6, the second end of described resistance R 19 and the first end of described adjustable shunt regulator ZD2 are connected to ground altogether, the collector electrode of described NPN type triode Q6 respectively with the first end of described resistance R 19 be connected the first end of resistance R 20 and be connected, the second end of described resistance R 20 respectively with the second end of described resistance R 21, the second end of described resistance R 22, the 3rd end of described adjustable shunt regulator ZD2 and the first end of described capacitor C 8 connect, described the first output of the first termination of described resistance R 21, described the second output of the first termination of described resistance R 22, the second end of described capacitor C 8 respectively with the second end of described adjustable shunt regulator ZD2 be connected the second end of photoelectrical coupler U2 and be connected, the second end of described photoelectrical coupler U2 is connected with described the second output.
9. a LED LCD TV, is characterized in that, described LED LCD TV comprises described power standby circuit as arbitrary in claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202536599U CN203289546U (en) | 2013-05-10 | 2013-05-10 | Power supply standby circuit and LED (light-emitting diode) liquid crystal display television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202536599U CN203289546U (en) | 2013-05-10 | 2013-05-10 | Power supply standby circuit and LED (light-emitting diode) liquid crystal display television |
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| Publication Number | Publication Date |
|---|---|
| CN203289546U true CN203289546U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202536599U Expired - Lifetime CN203289546U (en) | 2013-05-10 | 2013-05-10 | Power supply standby circuit and LED (light-emitting diode) liquid crystal display television |
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| Country | Link |
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| CN (1) | CN203289546U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993726A (en) * | 2015-06-29 | 2015-10-21 | 刘勇 | Power circuit in electronic equipment, and electronic equipment |
-
2013
- 2013-05-10 CN CN2013202536599U patent/CN203289546U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993726A (en) * | 2015-06-29 | 2015-10-21 | 刘勇 | Power circuit in electronic equipment, and electronic equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |