CN113612949A - Direct-current power supply switching circuit and television - Google Patents
Direct-current power supply switching circuit and television Download PDFInfo
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- CN113612949A CN113612949A CN202110979591.1A CN202110979591A CN113612949A CN 113612949 A CN113612949 A CN 113612949A CN 202110979591 A CN202110979591 A CN 202110979591A CN 113612949 A CN113612949 A CN 113612949A
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- 239000003990 capacitor Substances 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 28
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
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- 238000012986 modification Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
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Abstract
The invention discloses a direct-current power supply switch circuit and a television, wherein the direct-current power supply switch circuit comprises a direct-current control module, a direct-current switch module and a relay control module; the direct current control module is sequentially connected with the direct current switch module and the relay control module; the direct current control module is used for outputting control voltage to be transmitted to the relay control module through the direct current switch module when the direct current switch module is closed, and the relay control module is used for controlling the relay control module to normally work according to the control voltage. According to the invention, the direct current switch module is arranged between the direct current control module and the relay control module, so that the direct current power supply is effectively controlled, the power switch is conveniently operated, and the size of the power switch is effectively reduced.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a direct-current power supply switching circuit and a television
Background
The existing television is not provided with a switch or only provided with an alternating current switch, and the alternating current switch is also a simple safety device and is connected in a 220V alternating current circuit in series, and the alternating current switch is mainly used for controlling the on-off of 220V alternating current power supply, so the power utilization safety can not be well guaranteed; for the television with only the alternating current switch, the volume of the alternating current switch cannot be thinned and reduced due to the volume limitation and safety requirements of the power switch, and the alternating current switch can only be placed on the back or the side of the television, so that the attractiveness of the whole television design is low, the operation is difficult, and particularly the user experience of a high-end television is poor.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
The present invention provides a dc power switch circuit and a television set, aiming at solving the above-mentioned drawbacks of the prior art, and the present invention aims to solve the technical problems of inconvenient operation and large size of the power switch.
In order to achieve the purpose, the invention adopts the following technical scheme:
a direct current power supply switch circuit comprises a direct current control module, a direct current switch module and a relay control module; the direct current control module is sequentially connected with the direct current switch module and the relay control module; the direct current control module is used for outputting control voltage to be transmitted to the relay control module through the direct current switch module when the direct current switch module is closed, and the relay control module is used for controlling the relay control module to normally work according to the control voltage.
In the dc power switching circuit, the dc control module includes: the device comprises a battery unit, a power supply unit and a charging and discharging unit; the battery unit is respectively connected with the charging and discharging unit and the direct current switch module, the power supply unit is connected with the charging and discharging unit, and the charging and discharging unit is also connected with the direct current switch module; the battery unit is used for outputting a first control voltage to the direct current switch module when the direct current switch module is closed, the power supply unit is used for outputting a second control voltage to the direct current switch module when the relay control module works normally, and the charging and discharging unit is used for outputting a third control voltage to the direct current switch module when the voltage of the battery unit is lower than that of the charging and discharging unit.
Among the direct current power supply switch circuit, its characterized in that, relay control module includes switch element and relay unit, the switch element with direct current switch module with the relay unit is connected, the relay unit still is connected with city alternating current, the switch element is used for when control voltage is greater than the turn-on voltage of switch element, output turn-on signal extremely the relay unit, the relay unit is used for according to turn-on signal carries out normal work.
In the direct-current power switch circuit, the battery unit comprises a battery pack and a first diode; the 1 st foot of group battery with the positive pole of first diode is connected, the 2 nd foot, the 3 rd foot and the 4 th foot of group battery are all ground connection, the negative pole of first diode with charge and discharge unit, VCC with the direct current switch module is connected.
In the direct-current power supply switching circuit, the power supply unit comprises a power supply port, a second diode and a first resistor; the power supply port is connected with the anode of the second diode, the cathode of the second diode is connected with one end of the first resistor, and the other end of the first resistor is connected with the charge and discharge unit.
In the direct-current power supply switch circuit, the charge and discharge unit comprises a first capacitor and a third diode; one end of the first capacitor is connected with the anode of the third diode, and the cathode of the third diode is connected with the battery unit and the direct current switch module.
In the direct-current power supply switch circuit, the direct-current switch module comprises a direct-current switch; one end of the direct current switch is connected with the cathode of the first diode and the cathode of the third diode, and the other end of the direct current switch is connected with the relay control module.
In the dc power switching circuit, the switching unit includes: the second capacitor, the second resistor and the triode; one end of the second capacitor is connected with one end of the second resistor and the direct current switch module, the other end of the second resistor is connected with a base electrode of the triode, a collector electrode of the triode is connected with the relay unit, and one end of the second capacitor is grounded and an emitting electrode of the triode is grounded.
In the direct-current power supply switch circuit, the relay unit includes: a third resistor, a fourth diode and a relay; the other end of the third resistor is connected with the anode of the fourth diode and the 2 nd pin of the relay, the 1 st pin of the relay and the cathode of the fourth diode are both connected with VCC, and the 3 rd pin and the 4 th pin of the relay are connected with commercial alternating current.
A television comprises a PCB and a direct-current power switch, wherein the PCB is provided with a direct-current control module and a relay control module, the direct-current power switch is provided with the direct-current switch module, and the direct-current power switch is arranged at any position outside the television.
Compared with the prior art, the direct-current power supply switch circuit and the television provided by the invention comprise a direct-current control module, a direct-current switch module and a relay control module; the direct current control module is sequentially connected with the direct current switch module and the relay control module; the direct current control module is used for outputting control voltage when the direct current switch module is closed and transmitting the control voltage to the relay control module, and the relay control module is used for controlling the relay control module to normally work according to the control voltage. According to the invention, the direct current switch module is arranged between the direct current control module and the relay control module, so that the direct current power supply is effectively controlled, the power switch is conveniently operated, and the size of the power switch is effectively reduced.
Drawings
Fig. 1 is a block diagram of a dc power switch circuit according to the present invention;
fig. 2 is a circuit diagram of a dc power switch circuit provided in the present invention.
Reference numerals: 10: a DC control module; 11: a battery cell; 12: a power supply unit; 13: a charge and discharge unit; 20: a switch module; 30: a relay control module; 31: a switch unit; 32: a relay unit; r1: a first resistor; r2: a second resistor; r3: a third resistor; c1: a first capacitor; c2: a second capacitor; d1: a first diode; d2: a second diode; d3: a third diode; d4: a fourth diode; q1: a triode; k1: a DC switch; XS 1: a battery pack; u1: a relay.
Detailed Description
The direct-current power supply switching circuit and the television can effectively and conveniently use the power supply switch and reduce the volume of the switching power supply.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The following description is given of a design scheme of a dc power switch circuit by using specific exemplary embodiments, and it should be noted that the following embodiments are only used for explaining technical schemes of the invention, and are not specifically limited:
referring to fig. 1, a dc power switch circuit provided by the present invention includes a dc control module 10, a dc switch module 20 and a relay control module 30; the direct current control module 10 is sequentially connected with the direct current switch module 20 and the relay control module 30; the dc control module 10 is configured to output a control voltage to the relay control module 30 through the dc switch module 20 when the dc switch module 20 is turned on, and the relay control module 30 is configured to control the relay control module to normally operate according to the control voltage.
Specifically, under the condition that the power can be normally supplied to the television (in this embodiment, the normal power supply refers to normal connection of a power line of the television and normal supply of commercial alternating current power), if the direct current switch module 20 is in a closed state at this time, the direct current control module 10 outputs a control voltage to the direct current switch module 20, the direct current switch module 20 transmits the control voltage to the relay control module 30, the relay control module 30 controls the relay control module to normally work according to the control voltage, and then the television normally plays; if the dc switch module 20 is in the off state, the dc control module 10 cannot output the control voltage to the relay control module 30, and the tv cannot normally play.
Under the condition that the power cannot be normally supplied to the television (in this embodiment, the abnormal power supply means that a power line of the television is not connected or commercial alternating current power cannot be normally supplied), if the direct current switch module 20 is in a closed state at this time, the direct current control module 10 still outputs control voltage to be transmitted to the relay control module 30 through the direct current switch module 20, the relay control module 30 controls the relay control module to normally work according to the control voltage, and the relay control module 30 stops working until the direct current control module 10 cannot output the control voltage; if the dc switch module 20 is in the off state, the dc control module 10 cannot output the control voltage, and the relay control module 30 also cannot work normally.
In the invention, the control information is directly output by the direct current control module 10 and is transmitted to the relay control module 30 through the direct current switch module 20, so that the effective control on the relay control module 30 is formed, and the direct current switch module 20 can be randomly arranged at any place outside the television, thereby effectively facilitating the use of a switching power supply.
Further, the dc control module 10 includes: a battery unit 11, a power supply unit 12, and a charge and discharge unit 13; the battery unit 11 is respectively connected with the charging and discharging unit 13 and the direct current switch module 20, the power supply unit 12 is connected with the charging and discharging unit 13, and the charging and discharging unit 13 is also connected with the direct current switch module 20; the battery unit 11 is configured to output a first control voltage to the dc switch module 20 when the dc switch module 20 is closed, the power supply unit 12 is configured to output a second control voltage to the dc switch module 20 when the relay control module 30 normally operates, and the charging and discharging unit 13 is configured to output a third control voltage to the dc switch module 20 when the voltage of the battery unit 11 is lower than the voltage of the charging and discharging unit 13.
Specifically, under the condition of supplying power to the television normally, if the dc switch module 20 is in the closed state for the first time, the battery unit 11 will preferentially output the first control voltage to the dc switch module 20, the dc switch module 20 then transmits the first control voltage to the relay control module 30, the relay control module 30 controls itself to normally operate according to the first control voltage, and thereafter, the power supply unit 12 starts to operate, the battery unit 11 cannot output the first control voltage to the dc switch module 20, a second control voltage is output from the power supply unit 12 to the dc switch module 20 and a second control voltage is output to the charge and discharge unit 13 for charging, the dc switch module 20 transmits the second control voltage to the relay control module 30, and the relay control module 30 continues to operate; if the dc switch module 20 is in the off state, at this time, the battery unit 11, the power supply unit 12, and the charging and discharging unit 13 cannot output the control voltage to the relay control module 30, and the television cannot normally play; if the dc switch module 20 is in the closed state again, at this time, since the voltage of the battery unit 11 is lower than the voltage of the charging and discharging unit 13, the charging and discharging unit 13 preferentially outputs a third control voltage to the dc control module 10, the dc switch module 20 transmits the third control voltage to the relay control module 30, the relay control module 30 normally operates, and similarly, after that, the power supply unit 12 starts to operate, the charging and discharging unit 13 cannot output the third control voltage to the dc switch module 20, the power supply unit 12 outputs a second control voltage to the dc switch module 20, the dc switch module 20 transmits the second control voltage to the relay control module 30, and the relay control module 30 continues to operate.
In the case that the power cannot be normally supplied to the tv, if the dc switch module 20 is in the closed state, the charging and discharging unit 13 still outputs a third control voltage to be transmitted to the relay control module 30 through the dc switch module 20, the relay control module 30 still can work normally, however, since the commercial ac power is cut off, the tv set cannot normally operate until the voltage of the charge and discharge unit 13 is lower than the voltage of the battery unit 11, the charging and discharging unit 13 cannot output the third control voltage, the first control voltage output by the battery unit 11 is transmitted to the relay control module 30 through the dc switch module 20, and at this time, the relay control module 30 continues to operate until the battery unit 11 fails to output the first control voltage, at which time the relay control module 30 stops operating.
In the invention, the control information is output through the battery unit 11, the power supply unit 12 or the charging and discharging unit 13, and the relay control module 30 is finally controlled, so that the structure of the circuit is effectively simplified, and the cost of the control circuit is reduced.
Further, the relay control module 30 includes a switch unit 31 and a relay U1 unit 32, the switch unit 31 is connected to the dc switch module 20 and the relay U1 unit 32, the relay U1 unit 32 is further connected to the commercial ac power, the switch unit 31 is configured to output a turn-on signal to the relay U1 unit 32 when the control voltage is greater than a turn-on voltage of the switch unit 31, and the relay U1 unit 32 is configured to perform a normal operation according to the turn-on signal.
Specifically, when the control voltage transmitted by the dc switch module 20 is greater than the turn-on voltage of the switch unit 31, the switch unit 31 outputs a turn-on signal to the relay U1 unit 32, the relay U1 unit 32 starts to operate normally according to the turn-on signal, and commercial ac power is normally connected to the circuit, so as to perform the next operation. According to the invention, the switch unit 31 changes the working state of the switch unit according to the magnitude of the control voltage, so that the working state of the relay U1 is changed, and whether commercial alternating current is normally connected into the circuit is further controlled.
Further, referring to fig. 2, the battery unit 11 includes a battery pack XS1 and a first diode D1; the 1 st pin of the battery pack XS1 is connected to the anode of the first diode D1, the 2 nd, 3 rd and 4 th pins of the battery pack XS1 are all grounded, and the cathode of the first diode D1 is connected to the charging and discharging unit 13, VCC and the DC switch module 20.
Specifically, under the condition of supplying power to the television normally, if the dc switch module 20 is in the closed state for the first time, at this time, the battery pack XS1 will preferentially output the first control voltage to be transmitted to the dc switch module 20 through the first diode D1, and the dc switch module 20 transmits the first control voltage to the relay control module 30, so that the relay control module 30 performs the next operation. The first diode D1 is a general germanium diode, model number 4148 series, and current is 100 mA.
In the invention, the battery pack XS1 is arranged on the shell of the television, when the direct current switch module 20 is closed for the first time, the first control voltage is preferentially output and transmitted to the relay control module 30 through the direct current switch module 20, so that the television is controlled to be normally started, and the control on the startup of the television is effectively formed. The battery pack XS1 may be a non-rechargeable battery or a rechargeable battery, and in this embodiment, the battery pack is a button battery, the model of which is CR2032, and the specification of which is 3.3V 210mAh, and the button battery is mounted on a housing of a television, and the button battery has the advantages of small volume and easy replacement.
Further, the power supply unit 12 includes a power supply port, a second diode D2, and a first resistor R1; the power supply port is connected to an anode of the second diode D2, a cathode of the second diode D2 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to the charge and discharge unit 13.
Specifically, after the relay control module 30 starts to operate, the power supply port starts to output a second control voltage, which is transmitted to the dc switch module 20 through the second diode D2, the first resistor R1 and the charging and discharging unit 13, and at the same time, the power supply port outputs the second control voltage to the charging and discharging unit 13 for charging, and the dc switch module 20 transmits the second control voltage to the relay control module 30, so that the relay control module 30 performs the next operation. Similarly, the second diode D2 is a general germanium diode, model number 4148, and current is 100 ma.
In the present invention, after the relay control module 30 normally works, the control voltage output by the power supply port is transmitted to the relay control module 30 through the dc switch module 20, so that the relay control module 30 continues to normally work. The power supply port is 5V _ STB, and outputs a high-level signal, namely a first control voltage, when the relay control module 30 works normally; and when the relay control module 30 cannot work normally, outputting a low level signal. The first resistor R1 has a resistance of 220 ohms, and is a chip resistor for limiting current when charging the super capacitor.
Further, the charge and discharge unit 13 includes a first capacitor C1 and a third diode D3; one end of the first capacitor C1 is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to the battery cell 11 and the dc switch module 20.
Specifically, under the condition of normally supplying power to the television, if the dc switch module 20 is in the closed state for the first time and the relay U1 unit 32 starts to operate normally, the power supply unit 12 starts to output the first control voltage to the dc switch module 20 and the first capacitor C1, so that the dc switch module 20 performs the next operation and charges the first capacitor C1.
Under the condition that the power can be normally supplied to the television, if the dc switch module 20 is in the closed state again, at this time, since the voltage of the battery pack XS1 is lower than the voltage of the first capacitor C1, and the first diode D1 is cut off, the first capacitor C1 preferentially outputs the third control voltage to be transmitted to the dc control module 10 through the third diode D3, the dc switch module 20 transmits the third control voltage to the relay control module 30, the relay control module 30 normally operates, and then the power supply port starts to output the second control voltage to the relay control module 30, so that the relay control module 30 can continue to operate. The first capacitor C1 is a super capacitor with the specification of 0.22F/5.5V and the model of C631. Similarly, the third diode D3 is a general germanium diode, model number 4148, and current is 100 ma.
Further, the dc switch module 20 includes a dc switch K1; one end of the dc switch K1 is connected to the cathode of the first diode D1 and the cathode of the third diode D3, and the other end of the dc switch K1 is connected to the relay control module 30.
Specifically, when the television can be normally powered and the dc switch K1 is closed, the dc switch K1 transmits the first control voltage, the second control voltage, or the third control voltage to the relay control module 30, so that the relay control module 30 can normally operate. According to the invention, the DC switch K1 with small volume is adopted to replace an AC switch with large volume, so that the volume of the power switch can be effectively reduced, the attractiveness of a television is improved, the power switch can be placed at any position of the shell of the television, even connected to the television, and the operation of the power switch can be effectively facilitated; and effectively form the control to the relay through direct current switch to normally insert the city alternating current, replace and directly adopt alternating current switch to insert the city alternating current, promoted switch's security effectively.
Further, the switching unit 31 includes: the second capacitor C2, the second resistor R2 and the triode Q1; one end of the second capacitor C2 is connected to one end of the second resistor R2 and the dc switch module 20, the other end of the second resistor R2 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the relay U1 unit 32, and one end of the second capacitor C2 is grounded and the emitter of the transistor Q1 is grounded.
Specifically, when the dc switch K1 transmits the control voltage to the base of the transistor Q1 through the second resistor R2, it is first determined whether the control voltage is greater than the on-state voltage of the transistor Q1, and if so, the transistor Q1 is turned on, the switch unit 31 operates normally, and at this time, the relay U1 unit 32 also operates normally. The second capacitor C2 is used for high-frequency filtering to prevent high-frequency interference when the wire is too long; the resistance of the second resistor R2 is generally 20K, and is packaged as 0402.
Further, the relay U1 unit 32 includes: a third resistor R3, a fourth diode D4, and a relay U1; the other end of the third resistor R3 is connected with the anode of the fourth diode D4 and the 2 nd pin of the relay U1, the 1 st pin of the relay U1 and the cathode of the fourth diode D4 are both connected with VCC, and the 3 rd pin and the 4 th pin of the relay U1 are connected with commercial alternating current.
Specifically, when the control voltage is greater than the conduction voltage of the transistor Q1, the transistor Q1 is turned on, the relay U1 starts to operate normally, commercial alternating current is normally connected, and the power supply interface starts to output the first control voltage.
For better understanding of the present invention, the operation principle of the dc power switching circuit of the present invention will be described in detail with reference to fig. 2 as follows:
under the condition that the power line of the television is normally connected and commercial alternating current power is normally supplied, if the direct current switch K1 is closed for the first time, at this time, since commercial alternating current is not normally connected yet, no voltage is output from the charging port, and since the voltage of the first capacitor C1 is smaller than the voltage of the battery pack XS1, the third diode D3 is turned off, the first control voltage output by the battery pack XS1 is transmitted to the base of the triode Q1 through the direct current switch K1, and since the first control voltage at this time is larger than the conduction voltage of the triode Q1, the triode Q1 is turned on, the relay U1 normally operates, at this time, the second control voltage output by the power supply port is larger than the first control voltage, the first diode D1 is turned off, the second control voltage output by the power supply port is transmitted to the base of the triode Q1 through the direct current switch K1, and at the second control voltage output by the power supply port is transmitted to the first capacitor C1 for charging, since the first control voltage is also greater than the turn-on voltage of the transistor Q1, the transistor Q1 is turned on and the relay U1 continues to operate normally.
When the power line of the television is not connected or the commercial alternating current power cannot be normally supplied, that is, the power line is directly pulled out or the power is cut off, if the direct current switch K1 is in the closed state, because the voltage of the first capacitor C1 is greater than the voltage of the battery pack XS1 at this time, the first diode D1 is cut off, and the power supply port cannot output the second control voltage, only the first capacitor C1 outputs the third control voltage which is transmitted to the base of the triode Q1 through the direct current switch K1, and because the third control voltage is greater than the conducting voltage of the triode Q1 at this time, the triode Q1 is turned on, the relay U1 normally operates, because the commercial alternating current is cut off at this time, the television cannot normally operate until the voltage of the first capacitor C1 is lower than the voltage of the battery pack XS1, the third diode D3 is cut off, and the first capacitor C1 cannot output the third control voltage, the battery pack XS1 outputs the first control voltage, the first control voltage is transmitted to the triode Q1 through the direct current switch K1, at the moment, the triode Q1 is connected, and the relay U1 continues to work, and similarly, since the commercial alternating current is disconnected at the moment, the television cannot normally work until the battery pack XS1 outputs the first control voltage lower than the connection voltage of the triode Q1, at the moment, the triode Q1 is cut off, and the relay U1 stops working.
Further, the invention also provides a television, which comprises a PCB board and a dc power switch, and is characterized in that the PCB board is provided with the dc control module 10 and the relay control module 30, the dc power switch is provided with the dc switch module 20, and the dc power switch is arranged at any position outside the television, which is not described herein again because the circuit has been described in detail above.
In summary, the dc power switch circuit and the television provided by the invention include a dc control module, a dc switch module and a relay control module; the direct current control module is sequentially connected with the direct current switch module and the relay control module; the direct current control module is used for outputting control voltage to be transmitted to the relay control module through the direct current switch module when the direct current switch module is closed, and the relay control module is used for controlling the relay control module to normally work according to the control voltage. According to the invention, the direct current switch module is arranged between the direct current control module and the relay control module, so that the direct current power supply is effectively controlled, the power switch is conveniently operated, and the size of the power switch is effectively reduced.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A direct current power supply switch circuit is characterized by comprising a direct current control module, a direct current switch module and a relay control module; the direct current control module is sequentially connected with the direct current switch module and the relay control module; the direct current control module is used for outputting control voltage to be transmitted to the relay control module through the direct current switch module when the direct current switch module is closed, and the relay control module is used for controlling the relay control module to normally work according to the control voltage.
2. The dc power switching circuit of claim 1, wherein the dc control module comprises: the device comprises a battery unit, a power supply unit and a charging and discharging unit; the battery unit is respectively connected with the charging and discharging unit and the direct current switch module, the power supply unit is connected with the charging and discharging unit, and the charging and discharging unit is also connected with the direct current switch module; the battery unit is used for outputting a first control voltage to the direct current switch module when the direct current switch module is closed, the power supply unit is used for outputting a second control voltage to the direct current switch module when the relay control module works normally, and the charging and discharging unit is used for outputting a third control voltage to the direct current switch module when the voltage of the battery unit is lower than that of the charging and discharging unit.
3. The dc power switch circuit according to claim 1, wherein the relay control module includes a switch unit and a relay unit, the switch unit is connected to the dc switch module and the relay unit, the relay unit is further connected to commercial ac power, the switch unit is configured to output a turn-on signal to the relay unit when the control voltage is greater than a turn-on voltage of the switch unit, and the relay unit is configured to perform normal operation according to the turn-on signal.
4. The dc power switching circuit of claim 2, wherein the battery cell includes a battery pack and a first diode; the 1 st foot of group battery with the positive pole of first diode is connected, the 2 nd foot, the 3 rd foot and the 4 th foot of group battery are all ground connection, the negative pole of first diode with charge and discharge unit, VCC with the direct current switch module is connected.
5. The direct-current power switching circuit according to claim 4, wherein the power supply unit includes a power supply port, a second diode, and a first resistor; the power supply port is connected with the anode of the second diode, the cathode of the second diode is connected with one end of the first resistor, and the other end of the first resistor is connected with the charge and discharge unit.
6. The DC power switching circuit of claim 5, wherein the charging and discharging unit comprises a first capacitor and a third diode; one end of the first capacitor is connected with the anode of the third diode, and the cathode of the third diode is connected with the battery unit and the direct current switch module.
7. The DC power switching circuit of claim 6, wherein the DC switching module comprises a DC switch; one end of the direct current switch is connected with the cathode of the first diode and the cathode of the third diode, and the other end of the direct current switch is connected with the relay control module.
8. The direct-current power switching circuit according to claim 3, wherein the switching unit includes: the second capacitor, the second resistor and the triode; one end of the second capacitor is connected with one end of the second resistor and the direct current switch module, the other end of the second resistor is connected with a base electrode of the triode, a collector electrode of the triode is connected with the relay unit, and one end of the second capacitor is grounded and an emitting electrode of the triode is grounded.
9. The direct-current power switching circuit according to claim 7, wherein the relay unit includes: a third resistor, a fourth diode and a relay; the other end of the third resistor is connected with the anode of the fourth diode and the 2 nd pin of the relay, the 1 st pin of the relay and the cathode of the fourth diode are both connected with VCC, and the 3 rd pin and the 4 th pin of the relay are connected with commercial alternating current.
10. A television set, comprising a PCB board and a dc power switch, wherein the dc control module and the relay control module as claimed in any one of claims 1 to 9 are disposed on the PCB board, the dc power switch is disposed with the dc switch module as claimed in any one of claims 1 to 9, and the dc power switch is disposed at any position outside the television set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110979591.1A CN113612949B (en) | 2021-08-25 | 2021-08-25 | DC power supply switching circuit and television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110979591.1A CN113612949B (en) | 2021-08-25 | 2021-08-25 | DC power supply switching circuit and television |
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| CN113612949B CN113612949B (en) | 2024-04-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202503594U (en) * | 2012-03-12 | 2012-10-24 | 姚晓虎 | Automatic digital television power controller |
| CN203301611U (en) * | 2013-06-06 | 2013-11-20 | 深圳Tcl新技术有限公司 | Direct-current switching circuit and switching power source |
| CN203522501U (en) * | 2013-09-17 | 2014-04-02 | 西安Tcl软件开发有限公司 | Dc power on-off control circuit and DC power device |
| CN107257201A (en) * | 2017-07-12 | 2017-10-17 | 刘世文 | TV set power controls circuit |
| CN110996027A (en) * | 2019-12-27 | 2020-04-10 | 深圳康佳电子科技有限公司 | Standby circuit, method and television |
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2021
- 2021-08-25 CN CN202110979591.1A patent/CN113612949B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202503594U (en) * | 2012-03-12 | 2012-10-24 | 姚晓虎 | Automatic digital television power controller |
| CN203301611U (en) * | 2013-06-06 | 2013-11-20 | 深圳Tcl新技术有限公司 | Direct-current switching circuit and switching power source |
| CN203522501U (en) * | 2013-09-17 | 2014-04-02 | 西安Tcl软件开发有限公司 | Dc power on-off control circuit and DC power device |
| CN107257201A (en) * | 2017-07-12 | 2017-10-17 | 刘世文 | TV set power controls circuit |
| CN110996027A (en) * | 2019-12-27 | 2020-04-10 | 深圳康佳电子科技有限公司 | Standby circuit, method and television |
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| CN113612949B (en) | 2024-04-19 |
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