CN109884927A

CN109884927A - A kind of control circuit and its control method, electronic equipment

Info

Publication number: CN109884927A
Application number: CN201910216930.3A
Authority: CN
Inventors: 刘松林
Original assignee: BOE Technology Group Co Ltd; K Tronics Suzhou Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; K Tronics Suzhou Technology Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2019-06-14

Abstract

The present invention discloses a kind of control circuit and its control method, electronic equipment, is related to field of display technology, to solve the problem of that electronic equipment dysfunction occurs and influence user experience in booting moment and shutdown moment.The control circuit includes: the first control sub-circuit, the second control sub-circuit and third control sub-circuit, sub-circuit cooperating is controlled by the first control sub-circuit, the second control sub-circuit and third, so that the level of port to be controlled is non-effective level in the booting moment of electronic equipment and shutdown moment, it is significant level during the work of electronic equipment.Control circuit provided by the invention is in electronic equipment.

Description

Control circuit, control method thereof and electronic equipment

Technical Field

The invention relates to the technical field of display, in particular to a control circuit, a control method thereof and electronic equipment.

Background

With the development of display technology, the application range of display devices is becoming wider and wider, and display devices generally include a display area and a peripheral area surrounding the display area, the display area is mainly used for displaying images, and the peripheral area can be provided with other functional modules besides an integrated circuit module for controlling the display area to realize a display function, for example: an audio output module, etc.; when the display device is actually used, the processor included in the display device controls the general input/output port to output a corresponding control signal, so that each functional module included in the display device is controlled to realize a corresponding function.

However, at the moment of power on or power off of the display device, the processor is not in a normal operating state, and thus the processor cannot normally control the general input/output ports to output normal signals, which easily causes abnormal operating states of the functional modules included in the display device, and causes adverse phenomena such as abnormal display or abnormal sound output at the moment of power on or power off of the display device, thereby affecting user experience.

Disclosure of Invention

The invention aims to provide a control circuit, a control method thereof and electronic equipment, which are used for solving the problem that the user experience is influenced by abnormal functions of the electronic equipment at the moment of starting and shutting down.

In order to achieve the above purpose, the invention provides the following technical scheme:

a first aspect of the present invention provides a control circuit applied to an electronic device, the control circuit including:

the first control sub-circuit is connected with a first power supply signal input end in the electronic equipment and used for outputting a first control signal from an output end of the first control sub-circuit according to a first power supply signal input by the first power supply signal input end;

the second control sub-circuit is respectively connected with the output end of the first control sub-circuit, a second power supply signal input end and a first level signal input end in the electronic equipment, and is used for controlling the output end of the second control sub-circuit to output a second control signal with a target level at the startup moment and the shutdown moment of the electronic equipment under the control of the output end of the first control sub-circuit, and controlling the output end of the second control sub-circuit to output a second control signal with a non-target level during the working period of the electronic equipment;

and the third control sub-circuit is respectively connected with the output end of the second control sub-circuit, the port to be controlled in the electronic equipment, the second power supply signal input end, the first level signal input end and the enable port in the electronic equipment, and is used for controlling the level of the port to be controlled to be at an ineffective level at the moment of starting and stopping of the electronic equipment under the control of the output end of the second control sub-circuit, and controlling the level of the port to be controlled to be at an effective level at the moment of working of the electronic equipment under the control of the output end of the second control sub-circuit and the enable port.

Optionally, the first control sub-circuit includes: the voltage stabilizing diode, the first resistance unit and the second resistance unit; wherein,

the cathode of the voltage stabilizing diode is connected with the first power signal input end, and the anode of the voltage stabilizing diode is respectively connected with the first end of the first resistance unit and the first end of the second resistance unit; the reverse cut-off voltage of the voltage stabilizing diode is greater than the voltage value of a second power supply signal input by the second power supply signal input end and is less than the voltage value of a first power supply signal input by the first power supply signal input end;

the second end of the first resistance unit is connected with the first level signal input end;

and the second end of the second resistance unit is connected with the output end of the first control sub-circuit.

Optionally, the second control sub-circuit includes: the circuit comprises a first switch unit, a switch diode, a third resistance unit, a fourth resistance unit, a fifth resistance unit and a capacitance unit; wherein,

the control end of the first switch unit is connected with the output end of the first control sub-circuit, the first end of the first switch unit is connected with the output end of the second control sub-circuit, and the second end of the first switch unit is connected with the first level signal input end, so that the connection between the output end of the second control sub-circuit and the first level signal input end is controlled to be switched on or switched off under the control of the output end of the first control sub-circuit;

the anode of the switching diode is connected with the second power supply signal input end, and the cathode of the switching diode is connected with the first end of the third resistance unit;

the second end of the third resistance unit is connected with the output end of the second control sub-circuit;

a first end of the fourth resistance unit is connected with the output end of the second control sub-circuit, and a second end of the fourth resistance unit is connected with the first level signal input end;

a first end of the fifth resistance unit is connected with a negative electrode of the switch diode, and a second end of the fifth resistance unit is connected with a first end of the capacitor unit;

and the second end of the capacitor unit is connected with the first level signal input end.

Optionally, the enable port includes a first enable port, the port to be controlled includes a first port to be controlled, and the third control sub-circuit includes: a sixth resistance unit, a seventh resistance unit, an eighth resistance unit, a ninth resistance unit, a second switching unit, and a third switching unit; wherein,

a first end of the ninth resistance unit is connected with the output end of the second control sub-circuit, and a second end of the ninth resistance unit is connected with the control end of the second switch unit;

the first end of the second switch unit is connected with the first port to be controlled, the second end of the second switch unit is connected with the first level signal input end, and the second switch unit is used for controlling the connection between the first port to be controlled and the first level signal input end to be switched on or switched off under the control of the output end of the second control sub-circuit;

a first end of the sixth resistance unit is connected with the second power signal input end, and a second end of the sixth resistance unit is connected with the first port to be controlled;

a first end of the seventh resistance unit is connected with the first enable port, and a second end of the seventh resistance unit is connected with a control end of the third switch unit;

the first end of the third switching unit is connected with the first port to be controlled, the second end of the third switching unit is connected with the first level signal end, and the third switching unit is used for controlling connection or disconnection between the first port to be controlled and the first level signal input end under the control of the first enabling port;

a first end of the eighth resistance unit is connected with the control end of the third switch unit, and a second end of the eighth resistance unit is connected with the first level signal input end.

Optionally, the enable port includes a second enable port, the port to be controlled includes a second port to be controlled, and the third control sub-circuit includes: a tenth resistance unit, an eleventh resistance unit, a twelfth resistance unit, a thirteenth resistance unit, a fourth switching unit, and a fifth switching unit; wherein,

a first end of the thirteenth resistance unit is connected with an output end of the second control sub-circuit, and a second end of the thirteenth resistance unit is connected with a control end of the fourth switch unit;

a first end of the fourth switching unit is connected with the second enable port, a second end of the fourth switching unit is connected with the first level signal input end, and the fourth switching unit is used for controlling connection or disconnection between the second enable port and the first level signal input end under the control of the output end of the second control sub-circuit;

a first end of the tenth resistance unit is connected with the control end of the fourth switch unit, and a second end of the tenth resistance unit is connected with the first level signal input end;

the control end of the fifth switch unit is connected with the second enabling port, the first end of the fifth switch unit is connected with the second port to be controlled, the second end of the fifth switch unit is connected with the first level signal input end, and the fifth switch unit is used for controlling connection or disconnection between the second port to be controlled and the first level signal input end under the control of the second enabling port;

a first end of the eleventh resistance unit is connected with the second power signal input end, and a second end of the eleventh resistance unit is connected with the second port to be controlled;

the first end of the twelfth resistance unit is connected with the second power signal input end, and the second end of the twelfth resistance unit is connected with the second enable port.

Based on the technical solution of the control circuit, a second aspect of the present invention provides an electronic device, including the control circuit, the electronic device further including:

the power supply circuit is respectively connected with a first power supply signal input end and a second power supply signal input end, and is used for controlling the first power supply signal input end to input a first power supply signal and controlling the second power supply signal input end to input a second power supply signal;

and the enabling circuit is respectively connected with the second power supply signal input end and the enabling port, and is used for controlling the enabling port to output an enabling signal according to the second power supply signal.

Based on the technical solution of the control circuit, a third aspect of the present invention provides a control method for a control circuit, which is applied to the control circuit, and the control method includes:

at the moment of starting and shutting down the electronic equipment, a first power signal is input to a first power signal input end in the electronic equipment, a second power signal is input to a second power signal input end in the electronic equipment, and a first control signal is output from an output end of a first control sub-circuit in the control circuit according to the first power signal; under the control of the output end of the first control sub-circuit, the output end of a second control sub-circuit in the control circuit outputs a second control signal with a target level; under the control of the output end of the second control sub-circuit, a third control sub-circuit in the control circuit controls the level of a port to be controlled in the electronic equipment to be an inactive level;

during the operation of the electronic device, the first control sub-circuit continues to output a first control signal from the output terminal of the first control sub-circuit according to the first power supply signal; under the control of the output end of the first control sub-circuit, the output end of the second control sub-circuit outputs a second control signal with a non-target level; and under the control of the output end of the second control sub-circuit and an enable port in the electronic equipment, a third control sub-circuit in the control circuit controls the level of the port to be controlled to be an effective level.

Optionally, when the first control sub-circuit includes: when the zener diode, the first resistance unit and the second resistance unit are used, the step of outputting the first control signal from the output end of the first control sub-circuit according to the first power signal by the first control sub-circuit in the control circuit specifically includes:

at the moment of starting up, a first power supply signal is input at the first power supply signal input end, the first power supply signal is in a rising state, the potential of the first power supply signal is smaller than the reverse cut-off voltage of the voltage stabilizing diode, the voltage stabilizing diode is cut off, and the first control signal output end outputs a first control signal with low level;

during the working period, the first power supply signal is in a stable state, the potential of the first power supply signal is greater than the reverse cut-off voltage of the voltage stabilizing diode, the voltage stabilizing diode is conducted, and the first control signal output end outputs a first control signal with high level;

at the moment of shutdown, the first power supply signal is in a falling state, the potential of the first power supply signal is smaller than the reverse cut-off voltage of the voltage stabilizing diode, the voltage stabilizing diode is cut off, and the first control signal output end outputs a first control signal with low level;

when the second control sub-circuit comprises: when the first switch unit, the switch diode, the third resistance unit, the fourth resistance unit, the fifth resistance unit and the capacitance unit are used, the working process of the second control sub-circuit specifically includes:

at the moment of starting up and the moment of shutting down, under the control of the output end of the first control sub-circuit, the first switch unit controls to disconnect the connection between the output end of the second control sub-circuit and the first level signal input end, and the output end of the second control sub-circuit outputs a second control signal with a target level;

during the operation period, under the control of the output end of the first control sub-circuit, the first switch unit controls to conduct the connection between the output end of the second control sub-circuit and the first level signal input end, and the output end of the second control sub-circuit outputs a second control signal with a non-target level.

Optionally, when the enable port includes a first enable port, the port to be controlled includes a first port to be controlled, and the third control sub-circuit includes: when the sixth resistance unit, the seventh resistance unit, the eighth resistance unit, the ninth resistance unit, the second switch unit, and the third switch unit are used, the working process of the third control sub-circuit specifically includes:

at the moment of starting up and shutting down, under the control of the output end of the second control sub-circuit, the second switch unit controls and conducts the connection between the first port to be controlled and the first level signal input end, so that the level of the first port to be controlled is an inactive level;

during the operation, under the control of the output end of the second control sub-circuit, the second switch unit controls to disconnect the first port to be controlled from the first level signal input end; under the control of the first enabling port, the third switching unit controls to turn on or off the connection between the first port to be controlled and the first level signal input end, so that the level of the first port to be controlled is an effective level.

Optionally, when the enable port includes a second enable port, the port to be controlled includes a second port to be controlled, the third control sub-circuit includes: when the tenth resistance unit, the eleventh resistance unit, the twelfth resistance unit, the thirteenth resistance unit, the fourth switch unit, and the fifth switch unit are used, the working process of the third control sub-circuit specifically includes:

at the moment of starting up and the moment of shutting down, under the control of the output end of the second control sub-circuit, the fourth switching unit controls and conducts the connection between the second enabling port and the first level signal input end, so that the level of the second port to be controlled is an invalid level;

during the operation period, under the control of the output end of the second control sub-circuit, the fourth switching unit controls to disconnect the second enable port from the first level signal input end; under the control of the second enabling port, the fifth switching unit controls to turn on or off the connection between the second port to be controlled and the first level signal input end, so that the level of the second port to be controlled is an effective level.

In the technical scheme provided by the invention, a first control signal with different levels can be output by a first control sub-circuit at the moment of starting up, the moment of shutting down and the working period, a second control signal with a target level can be output by a second control sub-circuit controlled by the first control signal at the moment of starting up and shutting down, a second control signal with a non-target level can be output during the working period, and further, under the common control of the second control signal and an enable signal input by an enable port, a third control sub-circuit can control the level of a port to be controlled to be a non-effective level at the moment of starting up and shutting down and an effective level during the working period; therefore, the control circuit provided by the embodiment of the invention can effectively control the level states of the port to be controlled of each functional module at the moment of starting up, the moment of shutting down and during working, thereby realizing the purpose of avoiding the problem that the user experience is influenced by the abnormal functions of each functional module at the moment of starting up and shutting down while ensuring the normal working state of each functional module in the electronic equipment.

In addition, the control circuit provided by the invention is controlled by the first power supply signal input end and the second power supply signal input end in the applied electronic equipment, so that at the moment of starting and stopping the electronic equipment, the control circuit can timely control the port to be controlled of the electronic equipment to be in an ineffective level, and the functional abnormality of each functional module in the electronic equipment at the moment of starting and stopping the electronic equipment is better avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a basic block diagram of a control circuit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first control sub-circuit and a second control sub-circuit according to an embodiment of the present invention;

FIG. 3 is a first structural diagram of a third control sub-circuit according to an embodiment of the present invention;

fig. 4 is a second structural diagram of a third control sub-circuit according to an embodiment of the present invention.

Detailed Description

In order to further explain the control circuit, the control method thereof and the electronic device provided by the embodiment of the invention, the following detailed description is made in conjunction with the accompanying drawings of the specification.

As described in the background art, for example, when an electronic device is used as a display device, a processor (e.g., Scalar IC, MCU, etc.) included in the display device cannot normally control each general purpose input/output port (GPIO) to output a normal enable signal at the moment of power on or power off of the display device, so that each functional module included in the display device is likely to have an abnormal operating state, which affects user experience.

Based on the above problems, the inventor of the present invention finds that a peripheral circuit can be designed separately to control the GPIO to output a normal signal at the instant of power-on or the instant of power-off, so as to avoid the problem that the user experience is affected due to the abnormal signal output by the GPIO at the instant of power-on or the instant of power-off.

Referring to fig. 1, an embodiment of the present invention provides a control circuit applied to an electronic device, where the control circuit includes:

a first control sub-circuit 1 connected to a first power signal input terminal VDD1 in the electronic device for outputting a first control signal Ctr1 from an output terminal of the first control sub-circuit 1 according to a first power signal inputted from a first power signal input terminal VDD 1;

the second control sub-circuit 2 is respectively connected with the output end of the first control sub-circuit 1, a second power signal input end VDD2 and a first level signal input end VSS in the electronic device, and is used for controlling the output end of the second control sub-circuit 2 to output a second control signal Ctr2 with a target level at the moment of starting up and shutting down the electronic device under the control of the output end of the first control sub-circuit 1, and controlling the output end of the second control sub-circuit 2 to output a second control signal Ctr2 with a non-target level during the working period of the electronic device;

the third control sub-circuit 3 is respectively connected to the output terminal of the second control sub-circuit 2, the port to be controlled CTL, the second power signal input terminal VDD2, the first level signal input terminal VSS and the enable port GPIO of the electronic device, and is configured to control the level of the port to be controlled CTL to be an inactive level at the power-on moment and the power-off moment of the electronic device under the control of the output terminal of the second control sub-circuit 2, and control the level of the port to be controlled CTL to be an active level at the output terminal of the second control sub-circuit 2 and the enable port GPIO during the operation of the electronic device.

The specific control method of the control circuit comprises the following steps:

at the moment of starting and shutting down the electronic device, a first power signal is input into a first power signal input terminal VDD1 in the electronic device, a second power signal is input into a second power signal input terminal VDD2 in the electronic device, and a first control signal Ctr1 is output from an output terminal of a first control sub-circuit 1 in the control circuit according to the first power signal; under the control of the output terminal of the first control sub-circuit 1, the output terminal of the second control sub-circuit 2 in the control circuit outputs a second control signal Ctr2 with a target level; under the control of the output end of the second control sub-circuit 2, a third control sub-circuit 3 in the control circuit controls the level of a port CTL to be controlled in the electronic equipment to be an inactive level;

during the operation of the electronic device, the first control sub-circuit 1 continues to output the first control signal Ctr1 from the output terminal of the first control sub-circuit 1 according to the first power signal; under the control of the output terminal of the first control sub-circuit 1, the output terminal of the second control sub-circuit 2 outputs a second control signal Ctr2 having a non-target level; under the control of the output end of the second control sub-circuit 2 and the enable port GPIO in the electronic device, the third control sub-circuit 3 in the control circuit controls the level of the port CTL to be controlled to be an active level.

It is worth noting that the electronic device goes through a startup moment, a working period and a shutdown moment in sequence from a working state to a stop working state, wherein at the startup moment, the voltages of the first power signal and the second power signal gradually rise, at the working period, the voltages of the first power signal and the second power signal are in a stable state, and at the shutdown moment, the voltages of the first power signal and the second power signal gradually fall. The first level signal input by the first level signal input terminal VSS may be set according to actual needs, and for example, the first level signal input terminal VSS may be connected to a negative electrode of a power supply in the electronic device to input a low-level first level signal. In addition, it should be noted that when the port to be controlled CTL is at an effective level, the functional module corresponding to the port to be controlled CTL can be controlled to be in a working state, and when the port to be controlled CTL is at an ineffective level, the functional module corresponding to the port to be controlled CTL cannot be controlled to be in a working state, that is, when the port to be controlled CTL is at an ineffective level, the functional module corresponding to the port to be controlled CTL cannot be abnormally started.

As can be seen from the specific structure and control method of the control circuit, the control circuit provided in the embodiment of the present invention includes a first control sub-circuit 1, a second control sub-circuit 2, and a third control sub-circuit 3, wherein the first control sub-circuit 1 can output a first control signal Ctr1 from an output end of the first control sub-circuit 1 according to a first power signal input by a first power signal input end VDD1, and since the first power signal is in a rising state at a power-on moment, is in a stable state during a working period, and is in a falling state at a power-off moment, the first control sub-circuit 1 can be set to control a level state of the output first control signal Ctr1 according to states of the first power signal at different times; thereby, the second control sub-circuit 2 can control the output terminal of the second control sub-circuit 2 to output the second control signal Ctr2 with the target level at the power-on moment and the power-off moment of the electronic device under the control of the output terminal of the first control sub-circuit 1, and control the output terminal of the second control sub-circuit 2 to output the second control signal Ctr2 with the non-target level during the working period of the electronic device; furthermore, under the control of the output end of the second control sub-circuit 2, the third control sub-circuit 3 can control the level of the port CTL to be controlled to be an inactive level at the moment of power-on and the moment of power-off of the electronic device, and under the control of the output end of the second control sub-circuit 2 and the enabling port GPIO, the level of the port CTL to be controlled to be an active level during the working period of the electronic device.

It can be seen that the control circuit provided in the embodiment of the present invention can output the first control signal Ctr1 with different levels through the first control sub-circuit 1 at the power-on instant, the power-off instant and the working period, control the second control sub-circuit 2 through the first control signal Ctr1 to output the second control signal Ctr2 with the target level at the power-on instant and the power-off instant, and output the second control signal Ctr2 with the non-target level at the working period, so that under the common control of the second control signal Ctr2 and the enable signal input by the enable port, the third control sub-circuit 3 can control the level of the port to be controlled to be the non-effective level at the power-on instant and the power-off instant, and to be the effective level during the working period; therefore, the control circuit provided by the embodiment of the invention can effectively control the level states of the port to be controlled of each functional module at the moment of starting up, the moment of shutting down and during working, thereby realizing the purpose of avoiding the problem that the user experience is influenced by the abnormal functions of each functional module at the moment of starting up and shutting down while ensuring the normal working state of each functional module in the electronic equipment.

In addition, the control circuit provided by the embodiment of the present invention is controlled by the first power signal input terminal VDD1 and the second power signal input terminal VDD2 of the electronic device to which the control circuit is applied, so that at the moment of powering on and powering off the electronic device, the control circuit can control the port CTL to be controlled of the electronic device to be at an inactive level in time, thereby better avoiding the functional abnormality of each functional module in the electronic device at the moment of powering on and powering off.

The first control sub-circuit 1, the second control sub-circuit 2 and the third control sub-circuit 3 provided in the above embodiments have various specific structures, and specific structures of the respective control sub-circuits are exemplified below.

As shown in fig. 2, in some embodiments, the above embodiments provide a first control sub-circuit 1 comprising: a zener diode Z1, a first resistance unit and a second resistance unit; the cathode of the zener diode Z1 is connected with the first power signal input end VDD1, and the anode of the zener diode Z1 is connected with the first end of the first resistance unit and the first end of the second resistance unit respectively; the reverse cut-off voltage of the zener diode Z1 is greater than the voltage value of the second power signal input by the second power signal input terminal VDD2 and less than the voltage value of the first power signal input by the first power signal input terminal VDD 1; the second end of the first resistance unit is connected with a first level signal input end VSS; the second terminal of the second resistance unit is connected to the output terminal of the first control sub-circuit 1.

The specific working process of the first control sub-circuit 1 with the above structure includes:

at the moment of starting up, a first power signal is input from the first power signal input end VDD1, the first power signal is in a rising state, the potential of the first power signal is smaller than the reverse cut-off voltage of the Zener diode Z1, the Zener diode Z1 is cut off, the first control signal output end receives a first level signal from the first level signal input end VSS and outputs a first control signal Ctr1 with low level;

during operation, the first power signal is in a stable state, the potential of the first power signal is greater than the reverse cut-off voltage of the zener diode Z1, the zener diode Z1 is turned on, the first control signal output terminal receives the first power signal from the first power signal input terminal VDD1 and outputs a first control signal Ctr1 with a high level;

at the moment of shutdown, the first power signal is in a falling state, and the potential of the first power signal is less than the reverse cut-off voltage of the zener diode Z1, the zener diode Z1 is cut off, and the first control signal output terminal receives the first level signal from the first level signal input terminal VSS and outputs the first control signal Ctr1 with a low level.

Specifically, the voltage value of the first power signal in the steady state may be set according to actual needs, for example, the voltage value of the first power signal in the steady state may be set to be 14V, and further, the reverse blocking voltage of the zener diode Z1 may be set to be 12V, so that during the process that the voltage value of the first power signal rises from 0V to 12V at the moment of starting up, the zener diode Z1 is in the blocking state, and when the first level signal input terminal VSS inputs a low level signal, it is possible to control the first control signal output terminal to output the first control signal Ctr1 at a low level; when the voltage value of the first power signal reaches 12V, and the electronic device enters a working period, the zener diode Z1 is in a conducting state, so that the first power signal input end VDD1 is communicated with the first control signal output end, and the first control signal output end can output a high-level first control signal Ctr 1; at the moment of shutdown, the voltage value of the first power supply signal is reduced from 14V to 0V, when the voltage value of the first power supply signal is less than 12V, the zener diode Z1 is in a cut-off state, and when a low-level signal is input to the first level signal input terminal VSS, the first control signal Ctr1 for controlling the first control signal output terminal to output a low-level signal can be realized; it can be seen that the first control sub-circuit 1 with the above structure can output the first control signal Ctr1 with low level at the moment of power-on and power-off, and output the first control signal Ctr1 with high level during the working period, thereby implementing the control of the second control sub-circuit 2.

It should be noted that, by setting the first power signal input by the first power signal input terminal VDD1, the reverse blocking voltage of the zener diode Z1, and the first level signal input by the first level signal input terminal VSS, it can also be achieved that the first control sub-circuit 1 is controlled to output the first control signal Ctr1 with a high level at the moment of power-on and power-off, and output the first control signal Ctr1 with a low level during the working period, thereby achieving the control of the second control sub-circuit 2, which is not described herein again.

In addition, the first resistor unit and the second resistor unit may each include one resistor, or a plurality of resistors connected in series, or a plurality of resistors connected in parallel, and the resistance of each resistor unit may also be selected according to actual needs, for example, the first resistor unit may include the first resistor R1, and the resistance of the first resistor R1 may be selected to be 10K Ω, the second resistor unit includes the second resistor R2, and the resistance of the second resistor R2 may be selected to be 4.7K Ω. The first resistance unit can play a role in voltage stabilization, and the second resistance unit can play a role in current limiting.

With continued reference to fig. 2, in some embodiments, the second control sub-circuit 2 provided in the above embodiments includes: the circuit comprises a first switch unit T1, a switch diode D1, a third resistance unit, a fourth resistance unit, a fifth resistance unit and a capacitance unit; wherein,

the control terminal of the first switch unit T1 is connected to the output terminal of the first control sub-circuit 1, the first terminal of the first switch unit T1 is connected to the output terminal of the second control sub-circuit 2, and the second terminal of the first switch unit T1 is connected to the first level signal input terminal VSS, for controlling to turn on or off the connection between the output terminal of the second control sub-circuit 2 and the first level signal input terminal VSS under the control of the output terminal of the first control sub-circuit 1;

the anode of the switching diode D1 is connected to the second power signal input terminal VDD2, and the cathode of the switching diode D1 is connected to the first end of the third resistor unit;

the second end of the third resistance unit is connected with the output end of the second control sub-circuit 2;

a first end of the fourth resistance unit is connected with the output end of the second control sub-circuit 2, and a second end of the fourth resistance unit is connected with the first level signal input end VSS;

a first end of the fifth resistance unit is connected with the cathode of the switching diode D1, and a second end of the fifth resistance unit is connected with the first end of the capacitance unit;

the second end of the capacitor unit is connected to the first level signal input terminal VSS.

The specific working process of the second control sub-circuit 2 with the above structure includes:

at the moment of power-on, the first control signal output terminal outputs the first control signal Ctr1 with a low level, under the control of the first control signal Ctr1, the first switch unit T1 controls to disconnect the output terminal of the second control sub-circuit 2 from the first level signal input terminal VSS, and at the same time, the second power signal can quickly reach a preset high level at the moment of power-on, so that the output terminal of the second control sub-circuit 2 can output the second control signal Ctr2 from the first power signal, and the second control signal Ctr2 has a high level (i.e. a target level).

During operation, the first control signal output terminal outputs the first control signal Ctr1 with a high level, and under the control of the first control signal Ctr1, the first switch unit T1 controls to turn on the connection between the output terminal of the second control sub-circuit 2 and the first level signal input terminal VSS, so that the output terminal of the second control sub-circuit 2 can output the second control signal Ctr2 from the first level signal, and the second control signal Ctr2 has a low level (i.e. a non-target level).

At the moment of shutdown, the first control signal output end outputs a first control signal Ctr1 with a low level, under the control of the first control signal Ctr1, the first switch unit T1 controls to disconnect the connection between the output end of the second control sub-circuit 2 and the first level signal input end VSS, and at the same time, the second power signal is in a falling state at the moment of shutdown, but due to the effect of the capacitor unit, the voltage value of the second power signal is slowly reduced, so that the output end of the second control sub-circuit 2 can output the second control signal Ctr2 from the first power signal, and the second control signal Ctr2 has a high level (i.e., a target level).

Therefore, when the control method provided by the above embodiment is used to control the second control sub-circuit 2 to operate, the second control sub-circuit 2 can output the second control signal Ctr2 with the target level at the moment of power-on and the moment of power-off, and output the second control signal Ctr2 with the non-target level during the operation, thereby implementing the control of the third control sub-circuit 3.

In addition, the switching diode D1 has a function of unidirectional conduction, and the switching diode D1 is arranged to prevent an electrical signal generated by the discharge of the capacitor unit from flowing to the second power signal input terminal VDD2 at the moment of shutdown, so as to ensure that the second control signal Ctr2 can keep a high level at the moment of shutdown; in addition, at other times except for the moment of shutdown, the switching diode D1 can also play a role in preventing the electric signal from flowing to the second power signal input terminal VDD2, so as to better ensure that the second power signal input terminal VDD2 is not interfered and has stable working performance.

It should be noted that the third resistor unit, the fourth resistor unit and the fifth resistor unit may each include one resistor or a plurality of resistors connected in series or a plurality of resistors connected in parallel, and the resistance of each resistor unit may also be selected according to actual needs, for example, the third resistor unit may include a third resistor R3, the resistance of the third resistor R3 may be selected to be 4.7K Ω, the fourth resistor unit includes a fourth resistor R4, the resistance of the fourth resistor R4 may be selected to be 10K Ω, and the fifth resistor unit includes two resistors connected in parallel (e.g., R51 and R52 in fig. 2), and the resistances of the two resistors may be set to be 330 Ω. The third resistance unit and the fifth resistance unit can play a role in limiting current, and the fourth resistance unit can play a role in stabilizing voltage.

The capacitor unit may specifically include one capacitor, or a plurality of capacitors connected in series, or a plurality of capacitors connected in parallel, and the resistance value of the capacitor unit may also be selected according to actual needs, for example, the capacitor unit is configured to include two capacitors (e.g., C11 and C12 in fig. 2), and the capacitance values of the two capacitors are both 10 μ F and the withstand voltage value is both 10V.

As shown in fig. 3, in some embodiments, the enable port GPIO provided in the above embodiments includes the first enable port GPIO1, the port to be controlled includes the first port to be controlled CTL1, and the third control sub-circuit 3 includes: a sixth resistance unit, a seventh resistance unit, an eighth resistance unit, a ninth resistance unit, a second switch unit T2, and a third switch unit T3; wherein,

a first end of the ninth resistance unit is connected with the output end of the second control sub-circuit 2, and a second end of the ninth resistance unit is connected with the control end of the second switch unit T2;

a first end of the second switch unit T2 is connected to the first passive port CTL1, a second end of the second switch unit T2 is connected to the first level signal input terminal VSS, and the second switch unit T2 is configured to control to turn on or off the connection between the first passive port CTL1 and the first level signal input terminal VSS under the control of the output end of the second control sub-circuit 2;

a first end of the sixth resistance unit is connected with the second power signal input end VDD2, and a second end of the sixth resistance unit is connected with the first to-be-controlled port CTL 1;

a first end of the seventh resistor unit is connected with the first enable port GPIO1, and a second end of the seventh resistor unit is connected with a control end of the third switch unit T3;

a first end of the third switching unit T3 is connected to the first passive port CTL1, a second end of the third switching unit T3 is connected to the first level signal end, and the third switching unit T3 is configured to control to turn on or off the connection between the first passive port CTL1 and the first level signal input terminal VSS under the control of the first enable port GPIO 1;

a first terminal of the eighth resistor unit is connected to the control terminal of the third switch unit T3, and a second terminal of the eighth resistor unit is connected to the first level signal input terminal VSS.

The specific operation process of the third control sub-circuit 3 with the above structure includes:

at the moment of power-on and power-off, the output terminal of the second control sub-circuit 2 outputs a second control signal Ctr2 with a high level (i.e. a target level), and under the control of the second control signal Ctr2, the second switch unit T2 controls to turn on the connection between the first passive port CTL1 and the first level signal input terminal VSS, so that the level of the first passive port CTL1 is at an inactive level.

During operation, the output terminal of the second control sub-circuit 2 outputs the second control signal Ctr2 having a low level (i.e. a non-target level), under the control of the second control signal Ctr2, the second switch unit T2 controls to disconnect the connection between the first port to be controlled CTL1 and the first level signal input terminal VSS, i.e. the second control signal Ctr2 does not have any influence on the potential of the first port to be controlled CTL1, at the same time, the first enable port GPIO1 outputs a first enable signal, which can be set according to actual needs, for example, when the first enable signal has a high level, the first enable signal controls the third switch unit T3 to conduct the connection between the first port to be controlled CTL1 and the first level signal input terminal VSS, so that the first port to be controlled CTL1 outputs a first level signal, i.e. the first level is used as an active level of the first port to be controlled CTL1, when the first enable signal has a low level, the first enable signal controls the third switching unit T3 to disconnect the first passive port CTL1 from the first level signal input terminal VSS, so that the first passive port CTL1 can output an electrical signal from the second power supply signal, i.e., the level of the electrical signal is used as the active level of the first passive port CTL 1.

It should be noted that, since the second switch unit T2 controls to turn on the connection between the first passive port CTL1 and the first level signal input terminal VSS at the moment of power-on and the moment of power-off, the potential of the first passive port CTL1 is not affected no matter whether the level of the first enable signal output by the first enable port GPIO1 is at a high level or a low level.

The third control sub-circuit 3 with the above structure is suitable for obtaining the first controlled port CTL1 with a low level at the moment of power-on and power-off, that is, the first controlled port CTL1 can obtain a low level no matter the level of the first enable signal output by the first enable port GPIO1 is a high level or a low level at the moment of power-on and power-off, so as to control the functional module corresponding to the first control port not to generate any abnormal phenomenon. It can be seen that the third control sub-circuit 3 with the above structure can control the level of the first controlled port CTL1 to be an inactive level at the moment of power on and the moment of power off, and can control the level of the first controlled port CTL1 to be an active level during the working period, thereby effectively controlling the level states of the controlled ports of the functional modules at the moment of power on, the moment of power off and the moment of working, and thus, while ensuring the normal working state of the functional modules in the electronic device, avoiding the problem that the functional modules are abnormal at the moment of power on and the moment of power off, and affecting the user experience.

It is to be noted that the sixth resistor unit, the seventh resistor unit, the eighth resistor unit, and the ninth resistor unit may each include one resistor or a plurality of resistors connected in series or a plurality of resistors connected in parallel, and the resistance of each resistor unit may also be selected according to actual needs, for example, the sixth resistor unit may include a sixth resistor R6, and the resistance of the sixth resistor R6 may be selected to be 4.7K Ω, the seventh resistor unit includes a seventh resistor R7, the resistance of the seventh resistor R7 may be selected to be 4.7K Ω, the eighth resistor unit includes an eighth resistor R8, the resistance of the eighth resistor R8 may be selected to be 10K Ω, the ninth resistor unit includes a ninth resistor R9, and the resistance of the ninth resistor R9 may be selected to be 100 Ω. The sixth resistor unit, the seventh resistor unit and the ninth resistor unit can play a role in limiting current, and the eighth resistor unit can play a role in stabilizing voltage.

As shown in fig. 4, in some embodiments, the enable port GPIO provided in the above embodiments includes the second enable port GPIO2, the port to be controlled CTL includes the second port to be controlled CTL2, and the third control sub-circuit 3 includes: a tenth resistance unit, an eleventh resistance unit, a twelfth resistance unit, a thirteenth resistance unit, a fourth switching unit T4, and a fifth switching unit T5; wherein,

a first end of the thirteenth resistance unit is connected with the output end of the second control sub-circuit 2, and a second end of the thirteenth resistance unit is connected with the control end of the fourth switch unit T4;

a first end of the fourth switching unit T4 is connected to the second enable port GPIO2, a second end of the fourth switching unit T4 is connected to the first level signal input terminal VSS, and the fourth switching unit T4 is configured to control to turn on or off the connection between the second enable port GPIO2 and the first level signal input terminal VSS under the control of the output end of the second control sub-circuit 2;

a first end of the tenth resistance unit is connected with the control end of the fourth switching unit T4, and a second end of the tenth resistance unit is connected with the first level signal input terminal VSS;

a control terminal of the fifth switching unit T5 is connected to the second enable port GPIO2, a first terminal of the fifth switching unit T5 is connected to the second to-be-controlled port CTL2, a second terminal of the fifth switching unit T5 is connected to the first level signal input terminal VSS, and the fifth switching unit T5 is configured to control to turn on or off the connection between the second to-be-controlled port CTL2 and the first level signal input terminal VSS under the control of the second enable port GPIO 2;

a first end of the eleventh resistor unit is connected with the second power supply signal input end VDD2, and a second end of the eleventh resistor unit is connected with the second port to be controlled CTL 2;

a first end of the twelfth resistor unit is connected to the second power signal input terminal VDD2, and a second end of the twelfth resistor unit is connected to the second enable port GPIO 2.

at the moment of power-on and power-off, the output end of the second control sub-circuit 2 outputs a second control signal Ctr2 with a high level (i.e. a target level), and under the control of the second control signal Ctr2, the fourth switch unit T4 controls to turn on the connection between the second enable port GPIO2 and the first level signal input terminal VSS, so that the level of the second port CTL2 to be controlled is an inactive level, and the second port CTL2 to be controlled is controlled to be a high level.

During operation, the output terminal of the second control sub-circuit 2 outputs a second control signal Ctr2 with a low level (i.e. a non-target level), and under the control of the second control signal Ctr2, the fourth switch unit T4 controls to disconnect the second enable port GPIO2 from the first level signal input terminal VSS, that is, the second control signal Ctr2 does not have any influence on the potential of the second port CTL2 to be controlled; meanwhile, the second enable port GPIO2 outputs a second enable signal, which may be set according to actual needs, and illustratively, when the second enable signal has a high level, the second enable signal controls the fifth switching unit T5 to turn on the connection between the second port to be controlled CTL2 and the first level signal input terminal VSS, so that the second port to be controlled CTL2 outputs a first level signal, that is, the first level is an effective level of the second port to be controlled CTL2, and when the second enable signal has a low level, the second enable signal controls the fifth switching unit T5 to turn off the connection between the second port to be controlled CTL2 and the first level signal input terminal VSS, so that the second port to be controlled CTL2 can output an electrical signal from the second power supply signal, that is, the level of the electrical signal is an effective level of the second port to be controlled CTL 2.

It should be noted that, at the moment of power-on and the moment of power-off, the fourth switch unit T4 controls to turn on the connection between the second enable port GPIO2 and the first level signal input terminal VSS, so that no matter whether the level of the second enable signal output by the second enable port GPIO2 is high level or low level, the potential of the second port CTL2 to be controlled is not affected.

The third control sub-circuit 3 with the above structure is suitable for the second port to be controlled CTL2 that needs to obtain a high level at the moment of power-on and the moment of power-off, that is, no matter the level of the second enable signal output by the second enable port GPIO2 is a high level or a low level at the moment of power-on and the moment of power-off, the second port to be controlled CTL2 can obtain a high level, so as to control the functional module corresponding to the first control port not to generate any abnormal phenomenon. It can be seen that the third control sub-circuit 3 with the above structure can control the level of the second port CTL2 to be controlled to be an inactive level at the moment of power on and the moment of power off, and can control the level of the second port CTL2 to be an active level during the working period, thereby effectively controlling the level states of the ports to be controlled of each functional module at the moment of power on, the moment of power off and the moment of working, and thus, while ensuring the normal working state of each functional module in the electronic device, avoiding the problem that the function of each functional module is abnormal at the moment of power on and the moment of power off, which affects the user experience.

It is to be noted that the tenth resistor unit, the eleventh resistor unit, the twelfth resistor unit, and the thirteenth resistor unit may each include one resistor or a plurality of resistors connected in series or a plurality of resistors connected in parallel, and the resistance of each resistor unit may also be selected according to actual needs, for example, the tenth resistor unit may include a tenth resistor R10, and the resistance of the tenth resistor R10 may be selected to be 10K Ω, the eleventh resistor unit includes an eleventh resistor R11, the resistance of the eleventh resistor R11 may be selected to be 10K Ω, the twelfth resistor unit includes a twelfth resistor R12, the resistance of the twelfth resistor R12 may be selected to be 10K Ω, the thirteenth resistor unit includes a thirteenth resistor R13, and the resistance of the thirteenth resistor R13 may be selected to be 100 Ω. The eleventh resistor unit, the twelfth resistor unit and the thirteenth resistor unit can play a role in limiting current, and the tenth resistor unit can play a role in stabilizing voltage.

In addition, the first to fifth switching units T1 to T5 provided in the above embodiments may be implemented by using a thin film transistor or a transistor, which can perform a switching function.

An embodiment of the present invention further provides an electronic device, including the control circuit provided in the foregoing embodiment, where the electronic device further includes:

the power supply circuit is respectively connected with the first power supply signal input end VDD1 and the second power supply signal input end VDD2, and is used for controlling the first power supply signal input end VDD1 to input a first power supply signal and controlling the second power supply signal input end VDD2 to input a second power supply signal;

and the enabling circuit is respectively connected with the second power supply signal input end VDD2 and the enabling port GPIO, and is used for controlling the enabling port GPIO to output an enabling signal according to the second power supply signal.

Specifically, the power supply circuit is configured to supply power to the electronic device and can provide a power supply signal required by the operation of the electronic device, and for example, the power supply circuit provides a first power supply signal to the first power supply signal input terminal VDD1 and provides a second power supply signal to the second power supply signal input terminal VDD2, where the first power supply signal and the second power supply signal can control at least some functional modules included in the electronic device to implement corresponding functions.

The enable module is connected to the second power signal input terminal VDD2 and the enable port, respectively, and the enable circuit can enable the enable port to output a corresponding enable signal under the control of the second power signal input from the second power signal input terminal VDD 2.

More specifically, the voltage value of the first power signal may be 14V, the voltage value of the second power signal may be 5V, and the enable circuit may specifically include a Scalar IC, where the Scalar IC may convert the received 5V voltage into 3.3V, and control a GPIO in the Scalar IC to output a corresponding enable signal according to the 3.3V voltage signal.

The electronic device provided by the embodiment of the invention comprises a power supply circuit, an enabling circuit and the control circuit provided by the embodiment, wherein the power supply circuit can provide corresponding power signals for the enabling circuit and the control circuit, so that at the moment of starting up, the moment of shutting down and during the working period of the electronic device, the power supply circuit can synchronously provide corresponding power signals for the control circuit and the enabling circuit, so that when the enabling circuit cannot accurately control the output of the GPIO at the moment of starting up and shutting down, the control circuit can synchronously control the end to be controlled in the electronic device to be at an invalid level, and when the enabling circuit can accurately control the output of the GPIO during the working period, the control circuit cannot influence the output condition of the port to be controlled, so that the port to be controlled can be accurately controlled to be at an valid level through the GOIP; therefore, in the electronic device provided by the embodiment of the present invention, the power supply circuit, the enabling circuit and the control circuit can cooperate with each other to effectively control the level states of the ports to be controlled of each functional module at the moment of power-on, the moment of power-off and during the working period, so that the problem that the user experience is affected due to abnormal functions of each functional module at the moment of power-on and the moment of power-off is avoided while the normal working state of each functional module in the electronic device is ensured.

The electronic device may be: any product or component with a display function, such as a television, a display, a digital photo frame, a mobile phone, a tablet computer and the like.

The embodiment of the present invention further provides a control method for a control circuit, which is applied to the control circuit provided in the above embodiment, and the control method includes:

at the moment of starting and shutting down the electronic device, a first power signal is input into a first power signal input terminal VDD1 in the electronic device, a second power signal is input into a second power signal input terminal VDD2 in the electronic device, and a first control signal Ctr1 is output from an output terminal of a first control sub-circuit 1 in the control circuit according to the first power signal; under the control of the output terminal of the first control sub-circuit 1, the output terminal of the second control sub-circuit 2 in the control circuit outputs a second control signal Ctr2 with a target level; under the control of the output end of the second control sub-circuit 2, a third control sub-circuit 3 in the control circuit controls the level of a port to be controlled in the electronic equipment to be an inactive level;

during the operation of the electronic device, the first control sub-circuit 1 continues to output the first control signal Ctr1 from the output terminal of the first control sub-circuit 1 according to the first power signal; under the control of the output terminal of the first control sub-circuit 1, the output terminal of the second control sub-circuit 2 outputs a second control signal Ctr2 having a non-target level; under the control of the output of the second control sub-circuit 2 and the enable port in the electronic device, the third control sub-circuit 3 in the control circuit controls the level of the port to be controlled to be an active level.

When the control circuit provided by the above embodiment is driven to operate by using the control method provided by the embodiment of the present invention, the first control sub-circuit 1 can output the first control signal Ctr1 from the output end of the first control sub-circuit 1 according to the first power signal input by the first power signal input end VDD1, and because the first power signal is in a rising state at the moment of power-on, is in a stable state during operation, and is in a falling state at the moment of power-off, the first control sub-circuit 1 can be set to control the level state of the output first control signal Ctr1 according to the states of the first power signal at different times; thereby, the second control sub-circuit 2 can control the output terminal of the second control sub-circuit 2 to output the second control signal Ctr2 with the target level at the power-on moment and the power-off moment of the electronic device under the control of the output terminal of the first control sub-circuit 1, and control the output terminal of the second control sub-circuit 2 to output the second control signal Ctr2 with the non-target level during the working period of the electronic device; furthermore, under the control of the output terminal of the second control sub-circuit 2, the third control sub-circuit 3 can control the level of the port to be controlled to be an inactive level at the moment of power-on and the moment of power-off of the electronic device, and under the control of the output terminal and the enable port of the second control sub-circuit 2, the level of the port to be controlled is an active level during the working period of the electronic device.

It can be seen that when the control circuit provided by the above embodiment is driven to operate by the control method provided by the embodiment of the present invention, the first control signal Ctr1 with different levels can be output by the first control sub-circuit 1 at the power-on moment, the power-off moment and during operation, the second control sub-circuit 2 can be controlled by the first control signal Ctr1 to output the second control signal Ctr2 with a target level at the power-on moment and the power-off moment, and the second control signal Ctr2 with a non-target level can be output during operation, so that under the common control of the second control signal Ctr2 and the enable signal input by the enable port, the level of the port to be controlled can be controlled by the third control sub-circuit 3 to be at the non-effective level at the power-on moment and the power-off moment and to be at the effective level during operation; therefore, when the control circuit provided by the embodiment of the present invention is driven to operate by the control method provided by the embodiment of the present invention, the level states of the ports to be controlled of each functional module at the power-on instant, the power-off instant, and during the operation period can be effectively controlled, so that the normal operation state of each functional module in the electronic device is ensured, and the problem that the user experience is affected due to the abnormal functions of each functional module at the power-on instant and the power-off instant is avoided.

In some embodiments, when the first control sub-circuit 1 comprises: when the zener diode Z1, the first resistance unit, and the second resistance unit are used, the step of the first control sub-circuit 1 in the control circuit outputting the first control signal Ctr1 from the output terminal of the first control sub-circuit 1 according to the first power signal specifically includes:

at the moment of starting up, a first power signal is input into a first power signal input end VDD1, the first power signal is in a rising state, the potential of the first power signal is smaller than the reverse cut-off voltage of a voltage stabilizing diode Z1, the voltage stabilizing diode Z1 is cut off, and a first control signal output end outputs a first control signal Ctr1 with low level;

during the working period, the first power supply signal is in a stable state, the potential of the first power supply signal is greater than the reverse cut-off voltage of the zener diode Z1, the zener diode Z1 is turned on, and the first control signal output end outputs a first control signal Ctr1 with a high level;

at the moment of shutdown, the first power supply signal is in a falling state, the potential of the first power supply signal is smaller than the reverse cut-off voltage of the zener diode Z1, the zener diode Z1 is cut off, and the first control signal output end outputs a first control signal Ctr1 with a low level;

in more detail, when the first control sub-circuit 1 adopts the above structure, a specific control method for controlling the operation of the first control sub-circuit 1 includes:

Therefore, when the control method provided by the above embodiment is used to control the first control sub-circuit 1 to operate, the first control sub-circuit 1 can output the first control signal Ctr1 with low level at the moment of power-on and the moment of power-off, and output the first control signal Ctr1 with high level during the operation, thereby implementing the control of the second control sub-circuit 2.

In some embodiments, when the second control sub-circuit 2 comprises: when the first switch unit T1, the switch diode D1, the third resistor unit, the fourth resistor unit, the fifth resistor unit, and the capacitor unit are used, the working process of the second control sub-circuit 2 specifically includes:

at the moment of power-on and power-off, under the control of the output terminal of the first control sub-circuit 1, the first switch unit T1 controls to disconnect the output terminal of the second control sub-circuit 2 from the first level signal input terminal VSS, and the output terminal of the second control sub-circuit 2 outputs a second control signal Ctr2 with a target level;

during operation, under the control of the output terminal of the first control sub-circuit 1, the first switch unit T1 controls to turn on the connection between the output terminal of the second control sub-circuit 2 and the first level signal input terminal VSS, and the output terminal of the second control sub-circuit 2 outputs the second control signal Ctr2 having a non-target level.

In more detail, when the second control sub-circuit 2 adopts the above structure, a specific control method for controlling the operation of the second control sub-circuit 2 includes:

In some embodiments, when the enabled port comprises the first enabled port GPIO1 and the port to be controlled comprises the first port to be controlled CTL1, the third control sub-circuit 3 comprises: when the sixth resistance unit, the seventh resistance unit, the eighth resistance unit, the ninth resistance unit, the second switch unit T2, and the third switch unit T3 are used, the working process of the third control sub-circuit 3 specifically includes:

at the moment of power-on and power-off, under the control of the output terminal of the second control sub-circuit 2, the second switch unit T2 controls to turn on the connection between the first controlled port CTL1 and the first level signal input terminal VSS, so that the level of the first controlled port CTL1 is at an inactive level;

during operation, under the control of the output terminal of the second control sub-circuit 2, the second switch unit T2 controls to disconnect the first passive port CTL1 from the first level signal input terminal VSS; under the control of the first enable port GPIO1, the third switching unit T3 controls to turn on or off the connection between the first passive port CTL1 and the first level signal input terminal VSS, so that the level of the first passive port CTL1 is at an active level.

In more detail, when the third control sub-circuit 3 adopts the above structure, a specific control method for controlling the operation of the third control sub-circuit 3 includes:

During operation, the output terminal of the second control sub-circuit 2 outputs the second control signal Ctr2 having a low level (i.e. a non-target level), under the control of the second control signal Ctr2, the second switch unit T2 controls to disconnect the connection between the first passive port CTL1 and the first level signal input terminal VSS, and at the same time, the first enable port GPIO1 outputs a first enable signal, which can be set according to actual needs, for example, when the first enable signal has a high level, the first enable signal controls the third switch unit T3 to switch on the connection between the first passive port CTL1 and the first level signal input terminal VSS, so that the first passive port CTL1 outputs a first level signal, i.e. the first level is an active level of the first passive port CTL1, and when the first enable signal has a low level, the first enable signal controls the third switch unit T3 to disconnect the connection between the first passive port CTL1 and the first level signal input terminal CTL1, the first passive port CTL1 is enabled to output an electrical signal from the second power supply signal, i.e. the level of the electrical signal is taken as the active level of the first passive port CTL 1.

When the control method provided by the above embodiment is used to control the third control sub-circuit 3 to operate, the third control sub-circuit 3 with the above structure can control the level of the first port CTL1 to be an inactive level at the moment of power-on and the moment of power-off, and can control the level of the first port CTL1 to be an active level during the operation period, thereby effectively controlling the level states of the ports to be controlled of each functional module at the moment of power-on, the moment of power-off and the moment of operation, and thus, while ensuring the normal operation state of each functional module in the electronic device, avoiding the problem that the function abnormality occurs at the moment of power-on and the moment of power-off and the influence on the user experience.

In some embodiments, when the enabled port comprises the second enabled port GPIO2 and the port to be controlled comprises the second port to be controlled CTL2, the third control sub-circuit 3 comprises: when the tenth resistance unit, the eleventh resistance unit, the twelfth resistance unit, the thirteenth resistance unit, the fourth switch unit T4, and the fifth switch unit T5 are provided, the working process of the third control sub-circuit 3 specifically includes:

at the moment of power-on and power-off, under the control of the output end of the second control sub-circuit 2, the fourth switch unit T4 controls to turn on the connection between the second enable port GPIO2 and the first level signal input terminal VSS, so that the level of the second port to be controlled CTL2 is an inactive level;

during operation, under the control of the output terminal of the second control sub-circuit 2, the fourth switching unit T4 controls to disconnect the second enable port GPIO2 from the first level signal input terminal VSS; under the control of the second enable port GPIO2, the fifth switching unit T5 controls to turn on or off the connection between the second port to be controlled CTL2 and the first level signal input terminal VSS, so that the level of the second port to be controlled CTL2 is at an active level.

at the moment of power-on and power-off, the output terminal of the second control sub-circuit 2 outputs a second control signal Ctr2 with a high level (i.e. a target level), and under the control of the second control signal Ctr2, the fourth switch unit T4 controls to turn on the connection between the second enable port GPIO2 and the first level signal input terminal VSS, so that the level of the second port CTL2 to be controlled is an inactive level.

During operation, the output terminal of the second control sub-circuit 2 outputs a second control signal Ctr2 having a low level (i.e. a non-target level), and under the control of the second control signal Ctr2, the fourth switch unit T4 controls to disconnect the second enable port GPIO2 from the first level signal input terminal VSS; meanwhile, the second enable port GPIO2 outputs a second enable signal, which may be set according to actual needs, and illustratively, when the second enable signal has a high level, the second enable signal controls the fifth switching unit T5 to turn on the connection between the second port to be controlled CTL2 and the first level signal input terminal VSS, so that the second port to be controlled CTL2 outputs a first level signal, that is, the first level is an effective level of the second port to be controlled CTL2, and when the second enable signal has a low level, the second enable signal controls the fifth switching unit T5 to turn off the connection between the second port to be controlled CTL2 and the first level signal input terminal VSS, so that the second port to be controlled CTL2 can output an electrical signal from the second power supply signal, that is, the level of the electrical signal is an effective level of the second port to be controlled CTL 2.

When the control method provided by the above embodiment is used to control the third control sub-circuit 3 to operate, the third control sub-circuit 3 with the above structure can control the level of the second port CTL2 to be an inactive level at the moment of power-on and the moment of power-off, and can control the level of the second port CTL2 to be an active level during the operation period, thereby effectively controlling the level states of the ports to be controlled of each functional module at the moment of power-on, the moment of power-off and the moment of operation, and thus avoiding the problem that the user experience is affected due to abnormal functions of each functional module at the moment of power-on and the moment of power-off while ensuring the normal operation state of each functional module in the electronic device.

It should be noted that, in the present specification, all the embodiments are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the method embodiments, since they are substantially similar to the product embodiments, they are described simply, and reference may be made to the partial description of the product embodiments for relevant points.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A control circuit, applied to an electronic device, the control circuit comprising:

2. The control circuit of claim 1, wherein the first control sub-circuit comprises: the voltage stabilizing diode, the first resistance unit and the second resistance unit; wherein,

3. The control circuit of claim 1, wherein the second control sub-circuit comprises: the circuit comprises a first switch unit, a switch diode, a third resistance unit, a fourth resistance unit, a fifth resistance unit and a capacitance unit; wherein,

4. The control circuit according to any one of claims 1 to 3, wherein the enabled port comprises a first enabled port, the port to be controlled comprises a first port to be controlled, and the third control sub-circuit comprises: a sixth resistance unit, a seventh resistance unit, an eighth resistance unit, a ninth resistance unit, a second switching unit, and a third switching unit; wherein,

5. The control circuit according to any one of claims 1 to 3, wherein the enabled port comprises a second enabled port, the port to be controlled comprises a second port to be controlled, and the third control sub-circuit comprises: a tenth resistance unit, an eleventh resistance unit, a twelfth resistance unit, a thirteenth resistance unit, a fourth switching unit, and a fifth switching unit; wherein,

6. An electronic device comprising the control circuit according to any one of claims 1 to 5, the electronic device further comprising:

7. A control method of a control circuit, applied to the control circuit according to any one of claims 1 to 5, the control method comprising:

8. The control circuit of claim 7, wherein when the first control sub-circuit comprises: when the zener diode, the first resistance unit and the second resistance unit are used, the step of outputting the first control signal from the output end of the first control sub-circuit according to the first power signal by the first control sub-circuit in the control circuit specifically includes:

9. The control method of the control circuit according to claim 7 or 8, wherein when the enable port includes a first enable port and the port to be controlled includes a first port to be controlled, the third control sub-circuit includes: when the sixth resistance unit, the seventh resistance unit, the eighth resistance unit, the ninth resistance unit, the second switch unit, and the third switch unit are used, the working process of the third control sub-circuit specifically includes:

10. The control method of the control circuit according to claim 7 or 8, wherein when the enabled port includes a second enabled port and the port to be controlled includes a second port to be controlled, the third control sub-circuit includes: when the tenth resistance unit, the eleventh resistance unit, the twelfth resistance unit, the thirteenth resistance unit, the fourth switch unit, and the fifth switch unit are used, the working process of the third control sub-circuit specifically includes: