CN113612949B - DC power supply switching circuit and television - Google Patents
DC power supply switching circuit and television Download PDFInfo
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- CN113612949B CN113612949B CN202110979591.1A CN202110979591A CN113612949B CN 113612949 B CN113612949 B CN 113612949B CN 202110979591 A CN202110979591 A CN 202110979591A CN 113612949 B CN113612949 B CN 113612949B
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- 239000003990 capacitor Substances 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 2
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
Abstract
The invention discloses a direct-current power supply switching circuit and a television, wherein the direct-current power supply switching circuit comprises a direct-current control module, a direct-current switching 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 transmitting output control voltage 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 work normally 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 volume of the power switch is effectively reduced.
Description
Technical Field
The present invention relates to the field of electronic circuits, and in particular, to a dc power switching circuit and a television set
Background
The existing television is not provided with a switch or is provided with an alternating current switch, the alternating current switch is also provided with a simple safety device, and the alternating current switch is connected in series with a 220V alternating current circuit and is mainly used for controlling the on-off of 220V alternating current power supply, so that the power utilization safety cannot be well ensured; for the television with only the alternating current switch, because of the volume limitation of the power switch and the safety regulation requirement, the alternating current switch cannot be thinned and reduced in volume and can be placed on the back or the side of the television, so that the overall design is low in aesthetic degree and difficult to operate, and particularly, the user experience of a high-end machine type is poor.
There is thus a need for improvements and improvements in the art.
Disclosure of Invention
The invention aims to solve the technical problems of inconvenient operation and large volume of a power switch.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A DC power supply switching circuit comprises a DC control module, a DC switching 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 transmitting output control voltage 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 work normally according to the control voltage.
In the dc power switching circuit, the dc control module includes: the battery unit, the power supply unit and the charge and discharge unit; the battery unit is respectively connected with the charge and discharge unit and the direct current switch module, the power supply unit is connected with the charge and discharge unit, and the charge and discharge 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 charge and discharge 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 charge and discharge unit.
In the direct current power supply switch circuit, the relay control module comprises a switch unit and a relay unit, the switch unit is connected with the direct current switch module and the relay unit, the relay unit is also connected with commercial alternating current, the switch unit is used for outputting a conduction signal to the relay unit when the control voltage is larger than the conduction voltage of the switch unit, and the relay unit is used for normally working according to the conduction signal.
In the direct-current power supply switching 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 of group battery, 3 rd foot and 4 th foot all ground connection, the negative pole of first diode with charge and discharge unit, VCC with direct current switch module connects.
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-discharge unit.
In the direct-current power supply switching circuit, 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.
In the direct-current power supply switching circuit, the direct-current switching 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 the base electrode of the triode, the collector electrode of the triode is connected with the relay unit, and one end of the second capacitor is grounded and the emitter electrode of the triode is grounded.
In the dc power switching circuit, the relay unit includes: the third resistor, the fourth diode and the 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 connected with VCC, and the 3 rd pin and the 4 th pin of the relay are connected with AC.
The television comprises a PCB and a direct current power switch, wherein the direct current control module and the relay control module are arranged on the PCB, 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 switching circuit and the television provided by the invention comprise a direct-current control module, a direct-current switching 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, transmitting the control voltage to the relay control module, and the relay control module is used for controlling the relay control module to work normally 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 volume of the power switch is effectively reduced.
Drawings
Fig. 1 is a block diagram of a dc power switching circuit according to the present invention;
Fig. 2 is a circuit diagram of the dc power switching circuit provided by the present invention.
Reference numerals: 10: a direct current control module; 11: a battery unit; 12: a power supply unit; 13: a charge-discharge unit; 20: a switch module; 30: a relay control module; 31: a switching 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; XS1: a battery pack; u1: and a relay.
Detailed Description
The direct-current power supply switching circuit and the television provided by the invention can effectively and conveniently use the power supply switch, and reduce the volume of a switching power supply.
In order to make the objects, technical solutions and effects of the present invention clearer and more specific, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. 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. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that 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 unless defined otherwise. 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 of the design scheme of the dc power supply switch circuit is given by way of specific exemplary embodiments, and it should be noted that the following embodiments are only for explaining the technical scheme of the present invention, and are not limited to the specific embodiments:
Referring to fig. 1, the dc power switching circuit provided by the present invention includes a dc control module 10, a dc switching 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 transmit an output control voltage to the relay control module 30 via the dc switch module 20 when the dc switch module 20 is closed, and the relay control module 30 is configured to control itself to perform normal operation according to the control voltage.
Specifically, in the case that the television can be normally powered (in this embodiment, the normal power supply means that a power line of the television is normally connected and commercial ac power is normally provided), if the dc switch module 20 is in a closed state at this time, the dc control module 10 will output a control voltage to the dc switch module 20, the dc switch module 20 transmits the control voltage to the relay control module 30, the relay control module 30 controls itself to perform normal operation according to the control voltage, and then the television normally plays; if the dc switch module 20 is in the off state at this time, the dc control module 10 cannot output the control voltage to the relay control module 30, and the tv cannot play normally.
Under the condition that the television cannot be normally powered (in this embodiment, the power line of the television is not connected or the commercial ac power cannot be normally supplied), if the dc switch module 20 is in the closed state at this time, the dc control module 10 still outputs the control voltage to transmit to the relay control module 30 through the dc switch module 20, the relay control module 30 controls itself to normally operate according to the control voltage until the dc control module 10 cannot output the control voltage, and the relay control module 30 stops operating; if the dc switch module 20 is in the off state at this time, the dc control module 10 cannot output the control voltage, and the relay control module 30 cannot work normally.
In the invention, the control information is directly output through 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 of the relay control module 30 is formed, and the direct current switch module 20 can be arranged at any place outside the television, thereby effectively facilitating the use of a switch 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 charge and discharge unit 13 and the direct current switch module 20, the power supply unit 12 is connected with the charge and discharge unit 13, and the charge and discharge 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 is operating normally, and the charge/discharge 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 charge/discharge unit 13.
Specifically, under the condition that the television can be normally powered, if the dc switch module 20 is in the closed state for the first time, at this time, the battery unit 11 will output the first control voltage to the dc switch module 20 preferentially, the dc switch module 20 transmits the first control voltage to the relay control module 30, the relay control module 30 controls itself to work normally according to the first control voltage, after that, the power supply unit 12 starts to work, the battery unit 11 cannot output the first control voltage to the dc switch module 20, and then the power supply unit 12 outputs the second control voltage to the dc switch module 20 and outputs the second control voltage to the charge and discharge unit 13 to charge, and the dc switch module 20 transmits the second control voltage to the relay control module 30, and the relay control module 30 continues to work; 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 charge/discharge unit 13 cannot output the control voltage to the relay control module 30, and the television cannot play normally; 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 charge/discharge unit 13, the charge/discharge unit 13 will preferentially output the 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 operates normally, and after that, the power supply unit 12 starts to operate, the charge/discharge unit 13 cannot output the third control voltage to the dc switch module 20, and then the power supply unit 12 outputs the second control voltage to the dc switch module 20, and 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.
Under the condition that the television cannot be normally powered, if the dc switch module 20 is in the closed state at this time, the charge-discharge unit 13 still outputs a third control voltage to be transmitted to the relay control module 30 through the dc switch module 20, and the relay control module 30 can still work normally, but since the ac mains is disconnected, the television cannot work normally until the voltage of the charge-discharge unit 13 is lower than the voltage of the battery unit 11, the charge-discharge unit 13 cannot output the third control voltage, the battery unit 11 outputs the first control voltage to be transmitted to the relay control module 30 through the dc switch module 20, and at this time, the relay control module 30 continues to work until the battery unit 11 cannot output the first control voltage, and at this time, the relay control module 30 stops working.
In the invention, the control information is output through the battery unit 11, the power supply unit 12 or the charge and discharge unit 13, and finally the relay control module 30 is controlled, so that the circuit structure 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 with the dc switch module 20 and the relay U1 unit 32, the relay U1 unit 32 is further connected with the ac power supply, 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 the turn-on voltage of the switch unit 31, and the relay U1 unit 32 is configured to perform normal operation according to the turn-on signal.
Specifically, when the control voltage transmitted by the dc switch module 20 is greater than the on voltage of the switch unit 31, the switch unit 31 outputs an on signal to the relay U1 unit 32, and the relay U1 unit 32 starts to work normally according to the on signal, and the ac power supply is connected to the circuit normally, so as to perform the next operation. In the invention, the switch unit 31 changes the working state of the switch unit according to the magnitude of the control voltage, thereby changing the working state of the relay U1 and further controlling whether the commercial alternating current is normally connected to the circuit.
Further, referring to fig. 2, the battery unit 11 includes a battery XS1 and a first diode D1; the 1 st pin of the battery XS1 is connected with the anode of the first diode D1, the 2 nd pin, the 3 rd pin and the 4 th pin of the battery XS1 are all grounded, and the cathode of the first diode D1 is connected with the charge/discharge unit 13, VCC and the dc switch module 20.
Specifically, if the dc switch module 20 is in the closed state for the first time under the condition that the television can be normally powered, the battery XS1 will preferentially output the first control voltage and transmit the first control voltage 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 common germanium diode, the model is 4148 series, and the current is 100mA.
In the invention, by arranging the battery pack XS1 on the television shell, 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, thereby controlling the normal starting of the television and effectively forming the control on the starting of the television. The battery pack XS1 may be a non-rechargeable battery or a rechargeable battery, in this embodiment, a button battery, the model is CR2032, the specification is 3.3v 210mah, and the button battery is installed on a casing of a television, and 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 with the anode of the second diode D2, the cathode of the second diode D2 is connected with one end of the first resistor R1, and the other end of the first resistor R1 is connected with the charge-discharge unit 13.
Specifically, after the relay control module 30 starts to work, the power supply port starts to output the second control voltage to transmit the second control voltage to the dc switch module 20 through the second diode D2, the first resistor R1 and the charge/discharge unit 13, and at the same time, the power supply port outputs the second control voltage to the charge/discharge 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 common germanium diode, and the model is 4148 series, and the current is 100ma.
After the relay control module 30 works normally, the control voltage output by the power supply port is transmitted to the relay control module 30 through the direct current switch module 20, so that the relay control module 30 can work normally. Wherein, the power supply port is a 5v_stb, and outputs a high level signal, i.e. a first control voltage, when the relay control module 30 works normally; when the relay control module 30 fails to operate normally, a low level signal is output. The resistance value of the first resistor R1 is 220 ohms, and the first resistor R1 is a chip resistor and is used for limiting current when the super capacitor is charged.
Further, the charge-discharge unit 13 includes a first capacitor C1 and a third diode D3; one end of the first capacitor C1 is connected to an anode of the third diode D3, and a cathode of the third diode D3 is connected to the battery unit 11 and the dc switch module 20.
Specifically, in the case that the television can be normally powered, if the dc switch module 20 is in the closed state for the first time, and the relay U1 unit 32 starts to work 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 television can be normally powered, if the dc switch module 20 is in the closed state again, at this time, since the voltage of the battery XS1 is lower than the voltage of the first capacitor C1, the first diode D1 is cut off, so the first capacitor C1 will preferentially output 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 works normally, 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 work. The first capacitor C1 is a super capacitor, and has a specification of 0.22F/5.5V and a model number of C631. Similarly, the third diode D3 is a common germanium diode, and the model is 4148 series, and the current is 100ma.
Further, the dc switch module 20 includes a dc switch K1; one end of the direct current switch K1 is connected with the cathode of the first diode D1 and the cathode of the third diode D3, and the other end of the direct current switch K1 is connected with the relay control module 30.
Specifically, when the television can be normally powered and the dc switch K1 is turned on, 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 work normally. According to the invention, the direct current switch K1 with smaller volume is adopted to replace the alternating current switch with larger volume, so that the volume of the power switch can be effectively reduced, the aesthetic degree of the television is improved, and the direct current switch K1 can be placed at any position of the television shell and even connected to the television, and can be effectively convenient for operating the power switch; and the control of the relay is effectively formed through the direct current switch, so that the alternating current in the city is normally connected, the direct adoption of the alternating current switch to connect the alternating current in the city is replaced, and the safety of the power switch is effectively improved.
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 triode Q1, the collector of the triode Q1 is connected to the relay U1 unit 32, and one end of the second capacitor C2 is grounded and the emitter of the triode Q1 is grounded.
Specifically, when the dc switch K1 transmits the control voltage to the base electrode of the triode Q1 through the second resistor R2, it is first determined whether the control voltage is greater than the turn-on voltage of the triode Q1, if so, the triode Q1 is turned on, the switch unit 31 operates normally, and 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 overlong; the resistance value of the second resistor R2 is generally 20K, and is encapsulated to 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 connected with VCC, and the 3 rd pin and the 4 rd pin of the relay U1 are connected with AC.
Specifically, when the control voltage is greater than the conduction voltage of the triode Q1, the triode Q1 is turned on, the relay U1 starts to work normally, the commercial alternating current is connected normally, and the power supply interface starts to output the first control voltage.
For a better understanding of the present invention, the following describes the working principle of the dc power switching circuit of the present invention in detail with reference to fig. 2:
Under the condition that a 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 the moment, since commercial alternating current is not normally connected, no voltage is output from the charging port, and because the voltage of the first capacitor C1 is smaller than the voltage of the battery pack XS1, the third diode D3 is cut off, the first control voltage output by the battery pack XS1 is transmitted to the base electrode of the triode Q1 through the direct current switch K1, and because the first control voltage at the moment is larger than the conducting voltage of the triode Q1, the triode Q1 is conducted, the relay U1 works normally, at the moment, the second control voltage output by the power supply port is larger than the first control voltage, the first diode D1 is cut off, the second control voltage output by the power supply port is transmitted to the base electrode of the triode Q1 through the direct current switch K1, meanwhile, the second control voltage is output by the power supply port to charge the first capacitor C1, and because the first control voltage is also larger than the conducting voltage of the triode Q1, and the triode Q1 is conducted normally.
When the power line of the television is not connected or the commercial alternating current power cannot be normally provided, namely, when the power line is directly pulled out or the power is cut off, if the direct current switch K1 is in a closed state, the television cannot normally work until the voltage of the first capacitor C1 is lower than the voltage of the battery set XS1, the first diode D1 is cut off, the power supply port cannot output the second control voltage, the first capacitor C1 only outputs the third control voltage, the first control voltage is transmitted to the base electrode of the triode Q1 through the direct current switch K1, the triode Q1 is conducted because the third control voltage is higher than the conducting voltage of the triode Q1 at the moment, the relay U1 is normally operated, and the television cannot normally operate until the voltage of the first capacitor C1 is lower than the voltage of the battery set XS1, the first capacitor C1 cannot output the third control voltage, the battery set XS1 outputs the first control voltage, the direct current switch K1 is used for transmitting the voltage to the base electrode of the triode Q1, and the relay U1 is turned off until the triode Q1 is turned off, and the relay Q1 is normally operated until the triode Q1 is turned off.
Further, the present invention also provides a television, including a PCB board and a dc power switch, wherein the PCB board is provided with the dc control module 10 and the relay control module 30 as described above, the dc power switch is provided with the dc switch module 20 as described above, and the dc power switch is disposed at any position outside the television, and since the circuit has been described in detail above, the details are not repeated here.
In summary, the direct-current power supply switching circuit and the television provided by the invention comprise a direct-current control module, a direct-current switching 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 transmitting output control voltage 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 work normally 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 volume of the power switch is effectively reduced.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (7)
1. The direct-current power supply switching circuit is characterized by comprising a direct-current control module, a direct-current switching 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 transmitting output control voltage 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 work normally according to the control voltage;
The direct current control module comprises: the battery unit, the power supply unit and the charge and discharge unit; the battery unit is respectively connected with the charge and discharge unit and the direct current switch module, the power supply unit is connected with the charge and discharge unit, and the charge and discharge 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 charge and discharge 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 the voltage of the charge and discharge unit;
The battery unit comprises a battery pack and a first diode; the 1 st pin of the battery pack is connected with the anode of the first diode, the 2 nd pin, the 3 rd pin and the 4 th pin of the battery pack are all grounded, and the cathode of the first diode is connected with the charging and discharging unit, VCC and the direct current switch module;
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-discharge unit.
2. The direct current power supply switching circuit according to claim 1, wherein the relay control module includes a switching unit and a relay unit, the switching unit is connected with the direct current switching module and the relay unit, the relay unit is further connected with the alternating current of the city, the switching unit is used for outputting a conduction signal to the relay unit when the control voltage is greater than a conduction voltage of the switching unit, and the relay unit is used for performing normal operation according to the conduction signal.
3. The direct current power switching circuit according to claim 2, wherein the charge-discharge unit includes 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.
4. A dc power switching circuit according to claim 3, 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.
5. The direct current power supply switching circuit according to claim 2, 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 the base electrode of the triode, the collector electrode of the triode is connected with the relay unit, and one end of the second capacitor is grounded and the emitter electrode of the triode is grounded.
6. The direct current power supply switching circuit according to claim 4, wherein the relay unit includes: the third resistor, the fourth diode and the 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 connected with VCC, and the 3 rd pin and the 4 th pin of the relay are connected with AC.
7. A television, comprising a PCB board and a dc power switch, wherein the television further comprises a dc power switch circuit according to any one of claims 1 to 6, the PCB board is provided with the dc control module and the relay control module according to any one of claims 1 to 6, the dc power switch is provided with the dc switch module according to any one of claims 1 to 6, and the dc power switch is disposed at any position outside the television.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113612949A CN113612949A (en) | 2021-11-05 |
| CN113612949B true CN113612949B (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110979591.1A Active CN113612949B (en) | 2021-08-25 | 2021-08-25 | DC power supply switching circuit and television |
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| CN (1) | CN113612949B (en) |
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 |
-
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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| CN113612949A (en) | 2021-11-05 |
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