CN217718631U - Power supply circuit based on sequential control circuit - Google Patents
Power supply circuit based on sequential control circuit Download PDFInfo
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- CN217718631U CN217718631U CN202221472356.1U CN202221472356U CN217718631U CN 217718631 U CN217718631 U CN 217718631U CN 202221472356 U CN202221472356 U CN 202221472356U CN 217718631 U CN217718631 U CN 217718631U
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Abstract
The application provides a power supply circuit based on sequential control circuit. The power supply circuit comprises a time sequence control circuit, a mainboard, a power supply and a switch circuit; the main board is respectively connected with the time sequence control circuit and the switch circuit; the sequential control circuit is connected with the switch circuit, and the switch circuit is connected with the power supply; the switch circuit is disconnected when detecting a disconnection signal of the mainboard, so that the connection between the power supply and the sequential control circuit is disconnected; and the disconnection signal represents that the mainboard is in a power-down state. Through setting up switch circuit, avoid after the mainboard falls the electricity, mains voltage flows backward the mainboard, leads to unusually, guarantees circuit safety work.
Description
Technical Field
The present application relates to circuit technologies, and in particular, to a power supply circuit based on a sequential control circuit.
Background
The power supply circuit can be arranged in terminal equipment such as a display and the like and is used for ensuring the normal work of the terminal equipment. For example, the power supply circuit may be installed in a tablet device.
In the prior art, the power supply circuit may be a circuit that supplies voltage from a motherboard to a T-CON (Timing Controller). The lines between the motherboard and the T-CON cannot carry excessive current, and therefore, power supplies can be added, which supply power to the T-CON via the electronic harness.
However, the motherboard and the power supply are connected together at two ends of the T-CON, and when the motherboard is turned off and the power supply is not powered off, the power supply voltage may flow back to the motherboard, resulting in circuit abnormality and affecting the safe operation of the circuit.
SUMMERY OF THE UTILITY MODEL
The application provides a supply circuit based on sequential control circuit for avoid voltage to flow backward to the mainboard, guarantee supply circuit safety work.
In a first aspect, the present application provides a power supply circuit based on a sequential control circuit, including a sequential control circuit, a main board, a power supply, and a switch circuit;
the main board is respectively connected with the time sequence control circuit and the switch circuit; the time sequence control circuit is connected with the switch circuit, and the switch circuit is connected with the power supply;
the switch circuit is disconnected when detecting a disconnection signal of the mainboard, so that the connection between the power supply and the sequential control circuit is disconnected; and the disconnection signal represents that the mainboard is in a power-down state.
In some embodiments, the switching circuit includes a circuit opening and closing unit and a power transmission unit; the circuit switching unit is respectively connected with the power transmission unit, the main board and the power supply, and the power transmission unit is connected with the sequential control circuit;
and the circuit opening and closing unit is disconnected when detecting a disconnection signal of the main board, so that the connection between the power supply and the power transmission unit is disconnected.
In some embodiments, the turn-off signal is a low level voltage signal.
In some embodiments, the main board supplies power to the timing control circuit through a flexible flat cable.
In some embodiments, a power supply supplies power to the timing control circuit when the switch circuit is closed.
In some embodiments, the main board and the timing control circuit are connected in series, the power supply and the timing control circuit are connected in series, and the main board and the power supply are connected in parallel.
In some embodiments, the switching circuit includes a resistor, a capacitor, a diode, and a metal oxide semiconductor field effect transistor.
In some embodiments, the main board is a main board for providing 12 volts to the timing control circuit.
In some embodiments, the power supply is a power supply for providing 12 volts.
In some embodiments, the main board includes a power supply unit and a signal transfer unit, the power supply unit is connected with the timing control circuit, and the signal transfer unit is connected with the switch circuit;
the power supply unit is used for transmitting power to the sequential control circuit;
the switching circuit detects the disconnection signal through the signal transfer unit.
In a second aspect, the present application provides an interactive tablet comprising a timing control circuit based power supply circuit according to the first aspect of the present application.
The application provides a power supply circuit based on sequential control circuit, through connect a switch circuit between mainboard and power, makes the mainboard can control the power and supply power to sequential control circuit. If the mainboard is in a power-down state, the switch circuit can detect a disconnection signal of the mainboard, and the switch circuit is disconnected, so that the connection between the power supply and the time sequence control circuit is disconnected, and the connection between the power supply and the mainboard can also be disconnected. This application has solved prior art through setting up switch circuit, and after the mainboard falls the electricity, mains voltage flows backward to the problem of mainboard, avoids the mainboard to take place unusually, guarantees supply circuit safety work.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a power supply circuit based on a timing control circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a power supply circuit based on a timing control circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a power supply circuit based on a timing control circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a switching circuit according to an embodiment of the present disclosure.
Specific embodiments of the present application have been shown by way of example in the drawings and will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power supply circuit based on a sequential control circuit according to an embodiment of the present disclosure. In fig. 1, a power supply circuit 10 based on a timing control circuit includes a timing control circuit 101, a main board 102, and a power supply 103. The motherboard 102 may provide voltage to the timing control circuit 101 via a cable. Because the current on the line is too high, the cable cannot be charged, so that the power supply 103 can be added to supply power to the sequence control circuit 101 through the electronic wire harness.
The main board 102 and the power supply 103 are directly connected together at two ends of the timing control circuit 101, so that after the power failure of the main board 102 occurs and the power supply 103 is not powered off, the voltage of the power supply 103 flows back to the main board 102 to cause an abnormality. The power failure in this application may refer to a situation where the motherboard 102 cannot normally operate due to power failure, power loss, or a lack of power quality. The reverse flow of the voltage of the power supply 103 easily causes circuit damage, and influences the normal and safe operation of the power supply circuit. The embodiment of the application provides a power supply circuit based on a sequential control circuit to solve the above problems.
Fig. 2 is a schematic structural diagram of a power supply circuit based on a timing control circuit according to an embodiment of the present disclosure. The power supply circuit 10 based on the timing control circuit of the embodiment can be applied to a terminal device, and the terminal device can be an interactive tablet. As shown in fig. 2, the timing control circuit-based power supply circuit 10 may include a timing control circuit 101, a main board 102, a power supply 103, and a switch circuit 104.
The main board 102 is connected to the timing control circuit 101 and the switch circuit 104, respectively, the timing control circuit 101 is connected to the switch circuit 104, and the switch circuit 104 is connected to the power supply 103.
In this embodiment, if the motherboard 102 is in a power-down state, the switch circuit 104 may be turned off after detecting a turn-off signal of the motherboard 102, so as to disconnect the connection between the power supply 103 and the timing control circuit 101; the off signal indicates that the motherboard is in a power-down state, for example, the off signal may be a voltage signal indicating a low level.
Illustratively, the main board 102 is connected to the timing control circuit 101, and the main board 102 can supply power to the timing control circuit 101. The main board 102 may also be connected to the switch circuit 104, and the main board 102 may control the switch circuit 104 to open or close.
When the main board 102 is in a power-down state, the switch circuit 104 can detect a turn-off signal of the main board 102, and the switch circuit 104 has an automatic on-off function.
For example, a relay, a Metal Oxide Semiconductor (MOS) transistor, or another transistor in the switch circuit 104 may detect a voltage signal of the main board 102 changing from a high level to a low level as the off signal. For example, the high level is 1, the low level is 0, and if the low level 0 is detected, it is determined that the off signal is detected. The disconnect signal is used to indicate that the motherboard 102 has been powered down. The switching circuit 104 may turn itself off upon detecting the turn-off signal. In this embodiment, the composition structure of the switch circuit 104 is not particularly limited.
The switch circuit 104 may also detect a connection signal when the main board 102 resumes power supply, where the connection signal is used to close the switch circuit and connect the power supply 103 to the timing control circuit 101. The connection signal may also be a voltage signal, for example, the connection signal may be a voltage signal that changes from a low level to a high level. That is, the disconnection signal may be a voltage signal of a low level, and the connection signal may be a voltage signal of a high level.
The switch circuit 104 is connected to the power supply 103 and the timing control circuit 101, and the switch circuit 104 may be connected between the power supply 103 and the timing control circuit 101. If the switch circuit 104 is turned off, the connection between the power supply 103 and the timing control circuit 101 can be cut off, so as to prevent the voltage of the power supply 103 from flowing backward into the main board 102.
If the main board 102 can supply power to the timing control circuit 101, the switch circuit 104 is in a closed state, and the power supply 103 can supply power to the timing control circuit 101 through the switch circuit 104.
In this embodiment, the main board 102 and the power supply 103 can simultaneously supply power to the timing control circuit 101. For example, when the main board 102 normally supplies power to the timing control circuit 101, the switch circuit 104 is closed, and the power supply 103 also supplies power to the timing control circuit 101. When the main board 102 is powered down, the switch circuit 104 is turned off, and the power supply 103 cannot supply power to the timing control circuit 101.
In this embodiment, the main board 102 supplies power to the timing control circuit 101 through a flexible flat cable. The main board 102 is a main board for supplying 12 volts to the timing control circuit 101, and the power supply 103 is a power supply for supplying 12 volts.
Specifically, the main board 102 may provide 12V voltage to the sequential control circuit 101 through an FFC (Flexible Flat Cable) line, and because the current in the line is too large, the FFC line does not meet the current requirement, a 12V power supply 103 may be added, and the power supply 103 supplies power to the sequential control circuit 101 through an electronic harness, thereby meeting the current requirement and ensuring the normal operation of the power supply circuit.
In this embodiment, the power supply 103 supplies power to the timing control circuit 101 when the switch circuit 104 is closed.
Specifically, the power supply 103 supplies power to the timing control circuit 101 only when the switch circuit 104 is closed. When the switching circuit 103 is turned off, the power supply 103 does not supply power to the timing control circuit 101. The switch circuit 104 is turned off when the main board 102 is powered down, i.e., the power supply 103 does not supply power to the timing control circuit 101 when the main board is powered down. When the main board 102 is powered down, the voltage cannot be reversely flowed in the main board 102.
For example, after the main board 102 is powered off by 12V, the 12V voltage of the power supply 103 is not powered off, at this time, the switch circuit 104 is turned off, and the 12V voltage of the power supply 103 does not flow back to the main board to cause abnormality, thereby ensuring the safety of the circuit.
In this embodiment, the main board 102 is connected in series with the timing control circuit 101, the power supply 103 is connected in series with the timing control circuit 101, and the main board 102 is connected in parallel with the power supply 103.
Specifically, the main board 102 is connected in series with the timing control circuit 101, and supplies a voltage of 12V to the timing control circuit 101. The power supply 103 is connected in series with the timing control circuit 101, the power supply 103 also supplies a voltage of 12V to the timing control circuit 101, and a switch circuit 104 is connected between the power supply 103 and the timing control circuit 101.
The main board 102 and the power supply 103 are connected in parallel to two ends of the timing control circuit 101, so that the voltage received by the timing control circuit 101 is 12V. The normal operation of the timing control circuit 101 is maintained, and the current pressure on the line is shared.
In this embodiment, the main board includes a power supply unit and a signal transmission unit, the power supply unit is connected with the timing control circuit, and the signal transmission unit is connected with the switch circuit;
the power supply unit is used for transmitting power for the sequential control circuit;
the switching circuit detects the disconnection signal through the signal transfer unit.
Specifically, the main board 102 is connected to the timing control circuit 101, and is configured to transmit power to the timing control circuit 101. The main board 102 may include a power supply unit therein to supply power to the timing control circuit 101, that is, the power supply unit is connected to the timing control circuit 101. The main board may further include a signal transmission unit connected to the switch circuit 104, and the switch circuit 104 obtains the turn-off signal through the signal transmission unit, so as to open and close the switch circuit 104. The power supply unit and the switch circuit control unit may not affect each other, for example, when the switch circuit control unit fails, the power supply unit may still supply power to the sequential control circuit 101, so as to ensure normal operation of the sequential control circuit 101.
If the main board 102 is abnormal, such as power failure, the power supply unit and the switch circuit control unit cannot work normally. When the main board 102 is powered off, the switch circuit 104 acquires a turn-off signal from a high level to a low level of the main board 102 through the signal transmission unit, and the turn-off signal is used for indicating the turn-off of the switch circuit 104. The switch circuit 104 detects a turn-off signal of the motherboard 102, and turns off the switch circuit 104, that is, the connection between the power supply 103 and the timing control circuit 101 is disconnected, so as to prevent the voltage of the power supply 103 from flowing back to the motherboard 102 when the motherboard 102 is powered off.
After the main board 102 returns to normal, the switch circuit 104 may obtain a connection signal from a low level to a high level of the main board 102 through the signal transmission unit, where the connection signal is used to indicate that the switch circuit is closed. The switch circuit 104 detects the connection signal, closes a switch, and connects a line between the power supply 103 and the timing control circuit 101, so that the power supply 103 can supply power to the timing control circuit 101.
By arranging the power supply unit and the signal transmission unit, the power can be supplied to the sequential control circuit 101, the on-off control of the switch circuit 104 can be realized, the sequential control circuit 101 can be ensured to receive electric energy, the normal work of the power supply circuit is realized, the switch circuit 104 is timely turned on and off, and the safety of the power supply circuit is improved.
According to the power supply circuit 10 based on the sequential control circuit, the switch circuit 104 is connected between the main board 102 and the power supply 103, so that the main board 102 can control the power supply 103 to supply power to the sequential control circuit 101. If the main board 102 is in a power-down state, the switch circuit 104 may detect a disconnection signal of the main board 102, and the switch circuit 104 is disconnected, so that the connection between the power supply 103 and the timing control circuit 101 is disconnected, and the connection between the power supply 103 and the main board 102 may also be disconnected. This application has solved prior art through setting up switching circuit 104, and after mainboard 102 falls the power supply, the problem of power 103 voltage flowing backward to mainboard 102 avoids mainboard 102 to take place unusually to guarantee supply circuit's safe work.
Fig. 3 is a schematic structural diagram of a power supply circuit based on a timing control circuit according to an embodiment of the present disclosure. As shown in fig. 3, the switch circuit 104 includes a circuit opening and closing unit 1041 and a power transmission unit 1042; the circuit opening/closing unit 1041 is connected to the power transmission unit 1042, the main board 102, and the power supply 103, and the power transmission unit 1042 is connected to the timing control circuit 101.
If the main board 102 is in a power-down state, the circuit opening and closing unit 1041 detects an off signal of the main board 102, that is, when the circuit opening and closing unit 1041 detects the off signal of the main board 102, the circuit opening and closing unit is opened, so that the connection between the power supply 103 and the power supply transmission unit 1042 is disconnected.
Illustratively, the switch circuit 104 is connected between the main board 102 and the power supply 103, as well as between the timing control circuit 101 and the power supply 103. The switch circuit 104 includes a circuit opening/closing unit 1041 and a power transmission unit 1042.
The circuit opening/closing unit 1041 is used for detecting an open signal of the main board 102, opening a line between the power supply 103 and the timing control circuit 101, and for detecting a connection signal of the main board 102, closing a line between the power supply 103 and the timing control circuit 101.
The power supply power transmitting unit 1042 may be used to transmit the voltage of the power supply 103 to the timing control circuit 101. Power transmission section 1042 may transmit power when switch circuit 104 is closed, that is, transmit power when circuit opening/closing section 1041 is closed. If the switch circuit 104 is turned off, the power transmission unit 1042 cannot operate normally.
The circuit opening and closing unit 1041 may be located between the power supply 103 and the power transmission unit 1042. If the main board 102 is in a power-down state, the circuit opening/closing unit 1041 may detect an open signal of the main board, the switch circuit 104 is opened, and the connection between the power supply 103 and the power transmission unit 1042 is disconnected, that is, the connection between the power supply 103 and the timing control circuit 101 is disconnected.
If the main board 102 is in a normal power supply state, the circuit opening and closing unit 1041 is closed, the entire switch circuit 104 is closed, and the voltage of the power supply 103 can be transmitted to the timing control circuit 101 through the circuit opening and closing unit 1041 and the power transmission unit 1042.
By arranging the circuit switching unit 1041 and the power transmission unit 1042, the switching of the switching circuit 104 can be controlled in time, and when the switching circuit 104 is disconnected, the power supply 103 is stopped from supplying voltage to the sequential control circuit, so that an abnormality caused by voltage backflow when the mainboard 102 is powered down is avoided, and the problem of backflow of 12V voltage is effectively solved.
In this embodiment, if the motherboard 102 is in a power-down state, the circuit switching unit 1041 detects a voltage signal of the motherboard 102 from a high level to a low level; the circuit opening/closing unit 1041 is opened to disconnect the power supply 103 from the power transmission unit 1042.
Specifically, when the main board is powered off, the main board is changed from a high level to a low level, and therefore, if the circuit switching unit 1041 detects a voltage signal of the main board 102 from the high level to the low level, it is determined that the main board 102 is in a powered off state, and the circuit switching unit 1041 is turned off. After the circuit opening/closing unit 1041 is disconnected, the connection between the power supply 103 and the power transmission unit 1042 is disconnected, that is, the connection between the power supply 103 and the timing control circuit 101 is also disconnected, and the power supply 103 stops supplying power to the timing control circuit 101, so that the voltage of the power supply 103 is prevented from flowing backward to the main board 102.
If the circuit switching unit 1041 detects that the main board 102 is a voltage signal from a low level to a high level, it is determined that the main board 102 is in a working state of transmitting power to the timing control circuit 101, that is, the power-down state of the main board 102 is finished, and the circuit switching unit 1041 is connected. That is, the switch circuit 104 is closed, the power supply 103 is connected to the timing control circuit 101, and the power supply 103 supplies power to the timing control circuit 101. Whether the switch circuit 104 is disconnected or not is determined by detecting voltage signals with high and low level changes, the switch circuit 104 is controlled to be switched on and off in time, the problem that voltage backflow causes abnormity when the mainboard 102 is powered down is avoided, and the backflow problem of 12V voltage is effectively solved.
According to the power supply circuit 10 based on the sequential control circuit, the switch circuit 104 is connected between the main board 102 and the power supply 103, so that the main board 102 can control the power supply 103 to supply power to the sequential control circuit 101. If the main board 102 is in a power-down state, the switch circuit 104 may detect a disconnection signal of the main board 102, and the switch circuit 104 is disconnected, so that the connection between the power supply 103 and the timing control circuit 101 is disconnected, and the connection between the power supply 103 and the main board 102 may also be disconnected. This application has solved prior art through setting up switching circuit 104, and after mainboard 102 falls the power supply, the problem of power 103 voltage flowing backward to mainboard 102 avoids mainboard 102 to take place unusually to guarantee supply circuit's safe work.
Fig. 4 is a schematic structural diagram of a switching circuit according to an embodiment of the present disclosure. As shown in fig. 4, the switch circuit 104 may include resistors, capacitors, diodes, and mosfets.
Illustratively, five resistors, two capacitors, two metal oxide semiconductor field effect transistors and one diode may be included in the switching circuit 104. The MOS tube I and the MOS tube II are metal oxide semiconductor field effect transistors.
The switch circuit 104 can be automatically switched on and off according to the state of the main board, the switch circuit 104 is respectively connected with the main board 102, the power supply 103 and the timing control circuit 101, and the voltage values of the three ends are all 12V. By designing the switch circuit 104, the automatic on/off of the switch circuit 104 is realized, and the voltage of the power supply 103 is prevented from flowing back to the main board 102 when the main board 102 is powered off. In this embodiment, the number, type, and layout of the components in the switch circuit 104 are not particularly limited.
A switch circuit 104 controlled by the mainboard 102 is added at the power supply 103 end, so that when the 12V of the mainboard 102 is powered off, the 12V output of the power supply 103 is also powered off, and the power supply does not flow back to the mainboard 102 end.
In fig. 4, a circuit switching unit 1041 is formed by the second MOS transistor, the first resistor, the second resistor and the first capacitor, the second MOS transistor can detect a disconnection signal of the main board 102 from a high level to a low level, the second MOS transistor is disconnected, and the disconnection of the second MOS transistor can cause the first MOS transistor to be disconnected, so that the connection between the power supply 103 and the timing control circuit 101 is disconnected.
According to the power supply circuit 10 based on the sequential control circuit, the switch circuit 104 is connected between the main board 102 and the power supply 103, so that the main board 102 can control the power supply 103 to supply power to the sequential control circuit 101. If the main board 102 is in a power-down state, the switch circuit 104 may detect a disconnection signal of the main board 102, and the switch circuit 104 is disconnected, so that the connection between the power supply 103 and the timing control circuit 101 is disconnected, and the connection between the power supply 103 and the main board 102 may also be disconnected. This application has solved prior art through setting up switching circuit 104, and after mainboard 102 falls the power supply, the problem of power 103 voltage flowing backward to mainboard 102 avoids mainboard 102 to take place unusually to guarantee supply circuit's safe work.
The embodiment of the present application provides an interactive tablet, which may be a device having a display screen, for example, the interactive tablet may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a medical device, a fitness device, a personal digital assistant, a television and other terminal devices having a display screen. The interactive tablet 600 includes therein the power supply circuit based on the timing control circuit according to the above-described embodiment.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (11)
1. A power supply circuit based on a time sequence control circuit is characterized by comprising a time sequence control circuit, a mainboard, a power supply and a switch circuit;
the main board is respectively connected with the sequential control circuit and the switch circuit; the time sequence control circuit is connected with the switch circuit, and the switch circuit is connected with the power supply;
the switch circuit is disconnected when detecting a disconnection signal of the mainboard, so that the connection between the power supply and the sequential control circuit is disconnected; and the disconnection signal represents that the mainboard is in a power-down state.
2. The timing control circuit based supply circuit according to claim 1, wherein the switch circuit includes a circuit switching unit and a power transmission unit; the circuit switching unit is respectively connected with the power transmission unit, the mainboard and the power supply, and the power transmission unit is connected with the sequential control circuit;
and the circuit opening and closing unit is disconnected when detecting a disconnection signal of the main board, so that the connection between the power supply and the power transmission unit is disconnected.
3. The timing control circuit based power supply circuit according to claim 2, wherein the turn-off signal is a low level voltage signal.
4. The timing control circuit based power supply circuit according to claim 1, wherein the main board supplies power to the timing control circuit through a flexible flat cable.
5. The timing control circuit based power supply circuit of claim 1, wherein the power supply supplies power to the timing control circuit when the switch circuit is closed.
6. The timing control circuit based power supply circuit according to claim 1, wherein the main board and the timing control circuit are connected in series, the power supply and the timing control circuit are connected in series, and the main board and the power supply are connected in parallel.
7. The timing control circuit based supply circuit of claim 1, wherein the switching circuit comprises a resistor, a capacitor, a diode, and a metal oxide semiconductor field effect transistor.
8. The timing control circuit based power supply circuit according to any one of claims 1 to 7, wherein the main board is a main board for supplying 12 volts to the timing control circuit.
9. The timing control circuit based supply circuit according to any one of claims 1 to 7, wherein the power supply is a power supply for supplying a voltage of 12 volts.
10. The timing control circuit-based power supply circuit according to any one of claims 1-7, wherein the main board comprises a power supply unit and a signal transmission unit, the power supply unit is connected with the timing control circuit, and the signal transmission unit is connected with the switch circuit;
the power supply unit is used for transmitting power to the sequential control circuit;
the switching circuit detects the disconnection signal through the signal transfer unit.
11. An interactive tablet, characterized in that it comprises a supply circuit based on a timing control circuit according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221472356.1U CN217718631U (en) | 2022-06-13 | 2022-06-13 | Power supply circuit based on sequential control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221472356.1U CN217718631U (en) | 2022-06-13 | 2022-06-13 | Power supply circuit based on sequential control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN217718631U true CN217718631U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221472356.1U Active CN217718631U (en) | 2022-06-13 | 2022-06-13 | Power supply circuit based on sequential control circuit |
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| Country | Link |
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| CN (1) | CN217718631U (en) |
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- 2022-06-13 CN CN202221472356.1U patent/CN217718631U/en active Active
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