CN104935842A - Standby circuit, control method and television system of standby circuit - Google Patents
Standby circuit, control method and television system of standby circuit Download PDFInfo
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- CN104935842A CN104935842A CN201510324280.6A CN201510324280A CN104935842A CN 104935842 A CN104935842 A CN 104935842A CN 201510324280 A CN201510324280 A CN 201510324280A CN 104935842 A CN104935842 A CN 104935842A
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Abstract
The invention discloses a standby circuit. The standby circuit comprises a power sub circuit used for providing working power supply for a charging sub circuit and a television sub system; the charging sub circuit used for a standby power supply to provide charging voltages; a relay used for controlling a connecting status between the power sub circuit and a first external power supply; a control switch used for controlling a working state of the relay; a first contactor contact used for controlling the attraction of the relay while receiving the power supplied by a second external power supply, so that the power sub circuit is connected with the first external power supply; and a control chip used for outputting a control signal to the control switch in the situation that a user is connected with the second external power supply through the first contractor contact when the voltage of the standby power supply is lower than a first preset value, so that the control switch can control the attraction of the relay. The invention further discloses a control method and a television system of the standby circuit. According to the invention, the standby circuit realizes the emergency start of the standby power supply when the power of the standby power supply is lower, and improves the operation stability of the television.
Description
Technical field
The present invention relates to technical field of television sets, particularly relate to stand-by circuit, the control method of stand-by circuit and television system.
Background technology
As everyone knows, being typically provided with stand-by circuit in a television set for detecting whether receive standby wakeup signal when television set enters holding state, when there is standby wakeup signal, controlling television set and entering open state.Battery is set in traditional stand-by circuit usually as standby power, controls to charge the battery by relay adhesive.But when the not enough uncontrollable relay adhesive of cell voltage, then cannot complete the charge function of battery, television set will be caused to start.
Foregoing, only for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
Main purpose of the present invention is the control method and the television system that provide a kind of stand-by circuit, stand-by circuit, be intended to realize standby power electricity lower time emergency starting, improve the stability of television set work.
To achieve these goals, the invention provides a kind of stand-by circuit, described stand-by circuit comprises:
Power supply electronic circuit, for providing working power for charging electronic circuit and TV subsystem;
Charging electronic circuit, for providing charging voltage for standby power;
Relay, for controlling the connection status of described power supply electronic circuit and the first external power source;
Control switch, for controlling the operating state of described relay;
First contact contact, for when receiving the second external power source, control relay adhesive, is communicated with described first external power source to make described power supply electronic circuit;
Control chip, for when standby power voltage is lower than the first preset value, detect by the first contact contact connect the second external power source make relay adhesive when, output control signals to described control switch, control described relay adhesive to make described control switch.
Preferably, described control chip also for when detecting that described standby power voltage is greater than the second preset value and described TV subsystem is off-mode, outputs control signals to described control switch, controls described relay disconnect to make described control switch.
Preferably, described control chip also for when detecting described power supply electronic circuit and there is not out-put supply, outputs control signals to described control switch, controls described relay disconnect to make described control switch; When described power supply electronic circuit exists out-put supply or TV subsystem is open state, output control signals to described control switch, control described relay adhesive to make described control switch.
Preferably, described stand-by circuit also comprises storage capacitor, and the two ends of described storage capacitor connect with the described first positive and negative contact contacting contact respectively.
Preferably, described control switch comprises resistance and triode; Described triode is NPN triode, and the base stage of described triode is connected with the signal output part of described control chip by described resistance, and emitter is connected with the negative output terminal of described power supply electronic circuit, and collector electrode is connected with described relay.
In addition, for achieving the above object, the present invention also provides a kind of control method of stand-by circuit, and described stand-by circuit comprises:
Power supply electronic circuit, for providing working power for charging electronic circuit and TV subsystem;
Charging electronic circuit, for providing charging voltage for standby power;
Relay, for controlling the connection status of described power supply electronic circuit and the first external power source;
Control switch, for controlling the operating state of described relay;
First contact contact, for when receiving the second external power source, control relay adhesive, is communicated with described first external power source to make described power supply electronic circuit;
The control method of described stand-by circuit comprises the following steps:
Detect the voltage of described standby power;
When the voltage of described standby power is lower than the first preset value, and detect by the first contact contact connect the second external power source make relay adhesive time, output control signals to described control switch, control described relay adhesive to make described control switch.
Preferably, the described voltage when standby power is lower than the first preset value, and detect by the first contact contact connect the second external power source make relay adhesive time, output control signals to described control switch, with make described control switch control the step of described relay adhesive after also comprise:
When judging whether described TV subsystem is open state;
If so, then output control signals to described control switch, control described relay adhesive to make described control switch;
If not, then, when detecting that described standby power voltage is greater than the second preset value, outputing control signals to described control switch, controlling described relay to make described control switch and disconnecting.
Preferably, the described voltage when standby power is lower than the first preset value, and detect by the first contact contact connect the second external power source make relay adhesive time, output control signals to described control switch, with make described control switch control the step of described relay adhesive after also comprise:
Judge whether described power supply electronic circuit exists out-put supply;
If not, then output control signals to described control switch, control described relay to make described control switch and disconnect;
If so, then output control signals to described control switch, control described relay adhesive to make described control switch.
In addition, for achieving the above object, the present invention also provides a kind of television system, it is characterized in that, comprises TV subsystem, stand-by circuit and remote control circuit,
Described stand-by circuit comprises:
Power supply electronic circuit, for providing working power for charging electronic circuit and TV subsystem;
Charging electronic circuit, for providing charging voltage for standby power;
Relay, for controlling the connection status of described power supply electronic circuit and the first external power source;
Control switch, for controlling the operating state of described relay;
First contact contact, for when receiving the second external power source, control relay adhesive, is communicated with described first external power source to make described power supply electronic circuit;
Control chip, for when standby power voltage is lower than the first preset value, detect by the first contact contact connect the second external power source make relay adhesive when, output control signals to described control switch, control described relay adhesive to make described control switch;
Described remote control circuit comprise the second external power source and be electrically connected with described second external power source second contact contact, described second contact contact contacts contacts fit with described first.
The embodiment of the present invention, by arranging the first contact contact when standby power electricity is lower in stand-by circuit, accesses the second external power source, thus control relay adhesive; After relay adhesive, output control signals to control switch by control chip continue adhesive with control relay, thus can realize standby power electricity lower time emergency starting, improve the stability of television set work.
Accompanying drawing explanation
Fig. 1 is the circuit connection structure schematic diagram of stand-by circuit one embodiment of the present invention;
Fig. 2 is the circuit connection structure schematic diagram of remote control circuit in television system one embodiment of the present invention;
Fig. 3 is the schematic flow sheet of control method first embodiment of stand-by circuit of the present invention;
Fig. 4 is the schematic flow sheet of control method second embodiment of stand-by circuit of the present invention;
Fig. 5 is the schematic flow sheet of control method the 3rd embodiment of stand-by circuit of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of stand-by circuit, see figures.1.and.2, in one embodiment, this stand-by circuit comprises
Power supply electronic circuit 10, for providing working power for charging electronic circuit 11 and TV subsystem 12;
Charging electronic circuit 11, for providing charging voltage for standby power 13;
Relay 14, for controlling the connection status of described power supply electronic circuit 10 and the first external power source;
Control switch 15, for controlling the operating state of described relay 14;
First contact contact 16, for when receiving the second external power source 17 and powering, control relay 14 adhesive, is communicated with described first external power source to make described power supply electronic circuit 10;
Control chip 18, for when standby power 13 voltage is lower than the first preset value, detect by the first contact contact 16 connect the second external power source make relay 14 adhesive when, output control signals to described control switch 15, control the adhesive of described relay 14 to make described control switch 15.
The stand-by circuit that the present embodiment provides is mainly used in television set, during for entering stand-by operation state at television set, for TV subsystem provides stand-by operation power supply.Particularly, above-mentioned standby power 13 is preferably battery; Above-mentioned first external power source is 220V alternating current, and above-mentioned second external power source is preferably the battery in remote controller.It should be noted that above-mentioned control chip 18 also connects button electronic circuit 19 and infrared receiver electronic circuit 20, to receive corresponding control signal, such as, can receive standby signal and standby wakeup signal etc.
Particularly, when standby power 13 voltage enough allows relay 14 adhesive, export first by control chip 18 and control signal to control switch 15, disconnect with control relay 14, the first external power source and power supply electronic circuit 10 are disconnected.Now, standby power 13 provides power supply, wait-receiving mode standby wakeup signal for control chip 18, normally works again to control TV subsystem.When control chip 18 receives standby wakeup signal by connecing button electronic circuit 19 and/or infrared receiver electronic circuit 20, the second control signal control switch 15 will be exported by control chip 18, with control relay 14 adhesive, the first external power source is connected with power supply electronic circuit 10.Now, the voltage of the first external power source carries out changing rear output one road voltage to TV subsystem 12 by power supply electronic circuit 10, for TV subsystem is powered, export another road voltage to charging electronic circuit 11, for standby power 13 charges, simultaneously for control chip 18 and relay 14 provide working power, thus TV subsystem normally can be worked, ensure that TV subsystem 12 can switch to normal operating condition from holding state simultaneously.
Lower at standby power 13 voltage, can not allow relay 14 adhesive when, when control chip 18 receives standby wakeup signal by connecing button electronic circuit 19 and infrared receiver electronic circuit 20, even if control chip 18 exports second and controls signal to described control switch 15, relay 14 adhesive also cannot be made.Only when user connects above-mentioned second external power source 17 by the first contact contact 16, by the second external power source 17 control relay 14 adhesive, the first external power source is connected with power supply electronic circuit 10.Now the voltage of the first external power source carries out changing rear output one road voltage to TV subsystem 12 by power supply electronic circuit 10, for TV subsystem is powered, exports another road voltage to charging electronic circuit 11, for standby power 13 charges; Exporting second by control chip 18 controls signal to control switch 15 simultaneously, keeps attracting state, to ensure that TV subsystem 12 can normally start with control relay 14.
The embodiment of the present invention, by arranging the first contact contact 16 when standby power 13 electricity is lower in stand-by circuit, accesses the second external power source 17, thus control relay 14 adhesive; After relay 14 adhesive, output control signals to control switch 15 by control chip 18 continue adhesive with control relay 14, thus can realize standby power 13 electricity lower time emergency starting, improve the stability of television set work.
Further, based on above-described embodiment, in the present embodiment, when described TV subsystem 12 is open state, control chip 18 outputs control signals to described control switch 15, controls the adhesive of described relay 14 to make described control switch 15.Above-mentioned control chip 18 also for when detect described standby power 13 voltage be greater than the second preset value and described TV subsystem 12 for off-mode time, output control signals to described control switch 15, control described relay 14 to make described control switch 15 and disconnect.
In the present embodiment, above-mentioned control chip 18 is provided with a voltage sense pin and is electrically connected with TV subsystem 12, whether is in open state to detect TV subsystem; Control chip 18 is also provided with a voltage sense pin and is connected with standby power 13, and obtains the voltage of standby power 13 by the A/D digital to analog converter established in control chip 18.The size of above-mentioned second preset value can be arranged according to actual needs, and in the present embodiment, this second preset value is preferably 4.1V, the magnitude of voltage of standby power 13 under the state be namely full of at standby power 13.In the above-described embodiments, control chip 18 exports second and controls signal to after control switch 15 makes relay 14 adhesive, and charging electronic circuit 11 will start as standby power 13 charges, and provides operating voltage for control chip 18.Under TV subsystem 12 is in holding state, when control chip 18 detects standby power 13 charging complete, control chip 18 will export first and control signal to control switch 15, disconnects to make relay 14.Television set is made to be restored to Zero-power-consumption standby state.
Further, based on above-described embodiment, in the present embodiment, above-mentioned control chip 18 is also for when detecting described power supply electronic circuit 10 and there is not out-put supply, output control signals to described control switch 15, control described relay 14 to make described control switch 15 and disconnect; When described power supply electronic circuit 10 exists out-put supply, output control signals to described control switch 15, control the adhesive of described relay 14 to make described control switch 15.
The present embodiment detects power supply electronic circuit 10 in real time and whether there is out-put supply under the state of relay 14 adhesive, the input of charging electronic circuit 11 can be connected particularly, to determine whether power supply electronic circuit 10 exists out-put supply by a voltage sense pin of control chip 18.When power supply electronic circuit 10 does not exist out-put supply, namely the first external power source disconnects with power supply electronic circuit 10, and now output first is controlled signal to control switch 15 by control chip 18, disconnects to make relay 14.Thus effectively reduce the kwh loss of standby power 13.
Further, based on above-described embodiment, in the present embodiment, above-mentioned stand-by circuit also comprises storage capacitor C, and the two ends of described storage capacitor C connect with the described first positive and negative contact contacting contact 16 respectively.
In the present embodiment, due to the positive and negative contact shunt storage capacitor in the first contact contact 16, thus be connected on the positive and negative contact of the first contact contact 16 at the second external power source 17, can charge to storage capacitor C while control relay 14 conducting, therefore contacting at the second external power source 17 moment that contact 16 disconnects with first can be relay 14 adhesive by storage capacitor C, until control chip 18 exports second control signal to control switch 15, with control relay 14 adhesive.
Particularly, the structure of above-mentioned control switch 15 can be arranged according to actual needs, and in the present embodiment, preferably, above-mentioned control switch 15 comprises resistance R and triode Q; Described triode Q is NPN triode, and the base stage of described triode Q is connected with the signal output part of described control chip 18 by described resistance, and emitter is connected with the negative output terminal of described power supply electronic circuit 10, and collector electrode is connected with described relay 14.
In the present embodiment, above-mentioned second control signal is high level signal, above-mentioned first control signal low level signal.When control chip 18 exports high level signal to the base stage of triode Q, triode Q is in conducting state, and relay 14 is by adhesive; When control chip 18 output low level signal is to the base stage of triode Q, triode Q is in by state, and relay 14 will disconnect.
Further, with reference to Fig. 3, based on above-described embodiment, the present invention also provides a kind of control method of stand-by circuit, and described stand-by circuit comprises:
Power supply electronic circuit, for providing working power for charging electronic circuit and TV subsystem;
Charging electronic circuit, for providing charging voltage for standby power;
Relay, for controlling the connection status of described power supply electronic circuit and the first external power source;
Control switch, for controlling the operating state of described relay;
First contact contact, for when receiving the second external power source, control relay adhesive, is communicated with described first external power source to make described power supply electronic circuit;
The control method of described stand-by circuit comprises the following steps:
Step S10, detects the voltage of described standby power;
Step S20, when the voltage of described standby power is lower than the first preset value, and detect by the first contact contact connect the second external power source make relay adhesive time, output control signals to described control switch, control described relay adhesive to make described control switch.
Further, with reference to Fig. 4, based on above-described embodiment, in the present embodiment, also comprise after above-mentioned steps S20:
Step S30, judges whether described TV subsystem is open state; If then perform step S40, otherwise perform step S50;
Step S40, outputs control signals to described control switch, controls described relay adhesive to make described control switch;
Step S50, when detecting that described standby power voltage is greater than the second preset value, outputs control signals to described control switch, controls described relay disconnect to make described control switch.
Further, with reference to Fig. 5, based on above-described embodiment, in the present embodiment, also comprise after above-mentioned steps S20:
Step S60, judges whether described power supply electronic circuit exists out-put supply; If then perform step S70, otherwise perform step S80;
Step S70, outputs control signals to described control switch, controls described relay adhesive to make described control switch.
Step S80, outputs control signals to described control switch, controls described relay disconnect to make described control switch.
To it should be noted that in each embodiment of the control method of stand-by circuit owing to have employed the stand-by circuit in above-described embodiment, therefore there is the beneficial effect that above-mentioned stand-by circuit is all.In the control method embodiment of this external stand-by circuit, be above-mentioned control chip for performing the main body of this control method; Carried out the output of voltage detecting and control signal by control chip, thus realize the emergency starting of stand-by circuit.
In conjunction with seeing figures.1.and.2, the present invention also provides a kind of television system, and this television system comprises TV subsystem 12, stand-by circuit and remote control circuit, and the structure of this stand-by circuit can refer to above-described embodiment, does not repeat them here; Described remote control circuit comprise the second external power source 17 and be electrically connected with described second external power source 17 second contact contact 21, described second contact contact 21 contacts contact 16 adaptation with described first.Naturally, the television system due to the present embodiment have employed the technical scheme of above-mentioned stand-by circuit, and therefore this television system has all beneficial effects of above-mentioned stand-by circuit.It should be noted that above-mentioned remote control circuit is located on remote controller, and the function that the existing remote controller of tool is all (i.e. remote control electronic circuit can realize all functions), be not further described at this particularly.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a stand-by circuit, is characterized in that, comprising:
Power supply electronic circuit, for providing working power for charging electronic circuit and TV subsystem;
Charging electronic circuit, for providing charging voltage for standby power;
Relay, for controlling the connection status of described power supply electronic circuit and the first external power source;
Control switch, for controlling the operating state of described relay;
First contact contact, for when receiving the second external power source, control relay adhesive, is communicated with described first external power source to make described power supply electronic circuit;
Control chip, for when standby power voltage is lower than the first preset value, detect by the first contact contact connect the second external power source make relay adhesive when, output control signals to described control switch, control described relay adhesive to make described control switch.
2. stand-by circuit as claimed in claim 1, it is characterized in that, described control chip is also for when detecting that described standby power voltage is greater than the second preset value and described TV subsystem is off-mode, output control signals to described control switch, control described relay to make described control switch and disconnect.
3. stand-by circuit as claimed in claim 1, is characterized in that, described control chip also for when detecting described power supply electronic circuit and there is not out-put supply, outputs control signals to described control switch, controls described relay disconnect to make described control switch; When described power supply electronic circuit exists out-put supply or TV subsystem is open state, output control signals to described control switch, control described relay adhesive to make described control switch.
4. stand-by circuit as claimed in claim 1, it is characterized in that, described stand-by circuit also comprises storage capacitor, and the two ends of described storage capacitor connect with the described first positive and negative contact contacting contact respectively.
5. stand-by circuit as claimed in claim 1, it is characterized in that, described control switch comprises resistance and triode; Described triode is NPN triode, and the base stage of described triode is connected with the signal output part of described control chip by described resistance, and emitter is connected with the negative output terminal of described power supply electronic circuit, and collector electrode is connected with described relay.
6. a control method for stand-by circuit, is characterized in that, described stand-by circuit comprises:
Power supply electronic circuit, for providing working power for charging electronic circuit and TV subsystem;
Charging electronic circuit, for providing charging voltage for standby power;
Relay, for controlling the connection status of described power supply electronic circuit and the first external power source;
Control switch, for controlling the operating state of described relay;
First contact contact, for when receiving the second external power source, control relay adhesive, is communicated with described first external power source to make described power supply electronic circuit;
The control method of described stand-by circuit comprises the following steps:
Detect the voltage of described standby power;
When the voltage of described standby power is lower than the first preset value, and detect by the first contact contact connect the second external power source make relay adhesive time, output control signals to described control switch, control described relay adhesive to make described control switch.
7. the control method of stand-by circuit as claimed in claim 6, it is characterized in that, the described voltage when standby power is lower than the first preset value, and detect by the first contact contact connect the second external power source make relay adhesive time, output control signals to described control switch, with make described control switch control the step of described relay adhesive after also comprise:
Judge whether described TV subsystem is open state;
If so, then output control signals to described control switch, control described relay adhesive to make described control switch;
If not, then, when detecting that described standby power voltage is greater than the second preset value, outputing control signals to described control switch, controlling described relay to make described control switch and disconnecting.
8. the control method of stand-by circuit as claimed in claim 6, it is characterized in that, the described voltage when standby power is lower than the first preset value, and detect by the first contact contact connect the second external power source make relay adhesive time, output control signals to described control switch, with make described control switch control the step of described relay adhesive after also comprise:
Judge whether described power supply electronic circuit exists out-put supply;
If not, then output control signals to described control switch, control described relay to make described control switch and disconnect;
If so, then output control signals to described control switch, control described relay adhesive to make described control switch.
9. a television system, it is characterized in that, comprise TV subsystem, stand-by circuit and remote control circuit, the stand-by circuit of described stand-by circuit according to any one of claim 1 to 5, described remote control circuit comprise the second external power source and be electrically connected with described second external power source second contact contact, described second contact contact contacts contacts fit with described first.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510324280.6A CN104935842B (en) | 2015-06-12 | 2015-06-12 | The control method and television system of stand-by circuit, stand-by circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510324280.6A CN104935842B (en) | 2015-06-12 | 2015-06-12 | The control method and television system of stand-by circuit, stand-by circuit |
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| CN104935842B CN104935842B (en) | 2019-04-16 |
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| CN104935842B (en) | 2019-04-16 |
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