CN112701751A - Power supply circuit, power supply method and electronic equipment - Google Patents

Power supply circuit, power supply method and electronic equipment Download PDF

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Publication number
CN112701751A
CN112701751A CN202011524718.2A CN202011524718A CN112701751A CN 112701751 A CN112701751 A CN 112701751A CN 202011524718 A CN202011524718 A CN 202011524718A CN 112701751 A CN112701751 A CN 112701751A
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Prior art keywords
power supply
circuit
supply circuit
branch
voltage
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CN202011524718.2A
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CN112701751B (en
Inventor
郭彤
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The application discloses a power supply circuit, a power supply method and electronic equipment, and belongs to the technical field of charging. A power supply circuit, the power supply circuit comprising: the pixel driving circuit comprises a first power supply circuit and a second power supply circuit, wherein a first end of the first power supply circuit and a first end of the second power supply circuit are both connected with an external power supply, a second end of the first power supply circuit is connected with a first load through a first branch circuit and is connected with a charging end of a battery through a second branch circuit, and a second end of the second power supply circuit is connected with the charging end of the battery through a third branch circuit and is connected with an input end of the pixel driving circuit through a fourth branch circuit; and the controller is used for controlling the current output by the second end of the first power supply circuit and the second end of the second power supply circuit, so that the voltage of the second end of the second power supply circuit is smaller than the voltage of the input end of the pixel driving circuit. In the embodiment of the application, the problem of flicker of the display screen caused by floating of the output voltage of the charging IC can be solved under the condition of not reducing the charging current of the battery.

Description

Power supply circuit, power supply method and electronic equipment
Technical Field
The application belongs to the technical field of charging, and particularly relates to a power supply circuit, a power supply method and electronic equipment.
Background
The ELVDD and ELVSS of the pixel driving circuit of the display panel are directly connected to the source and drain of the transistor, and a gate signal is generated by its internal voltage converting circuit. The voltage jitter of ELVDD affects the Vgs voltage of the switching transistor, and the transistor operates in the constant current region, so the jitter of the Vgs voltage affects the current flowing through the light emitting diode, resulting in a flicker observed by the user, and therefore ELVDD is very sensitive to ripple and transient disturbance.
In the prior art, when the pixel driving circuit is powered by using the charging IC, since the charging IC also charges the battery, when the electric quantity of the battery is high, the voltage at the output end of the charging IC is closer to the ELVDD voltage, the ELVDD voltage rises along with the rise of the voltage at the output end of the charging IC, and when the ELVDD voltage reaches the threshold value, the ELVDD voltage may shake, which may cause a screen flash.
Disclosure of Invention
An object of the embodiments of the present application is to provide a power supply circuit, a power supply method, and an electronic device, which can solve the problem of flicker of a display screen caused by floating of an output voltage of a charging IC.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a power supply circuit, where the power supply circuit includes:
the first end of the first power supply circuit and the first end of the second power supply circuit are both connected with an external power supply, the second end of the first power supply circuit is connected with a first load through a first branch circuit and is connected with a charging end of a battery through a second branch circuit, and the second end of the second power supply circuit is connected with the charging end of the battery through a third branch circuit and is connected with the input end of the pixel driving circuit through a fourth branch circuit;
and the controller is used for controlling the current output by the second end of the first power supply circuit and the second end of the second power supply circuit, so that the voltage of the second end of the second power supply circuit is smaller than the voltage of the input end of the pixel driving circuit.
In a second aspect, an embodiment of the present application provides a power supply method, which is applied to the power supply circuit described in the first aspect, and the power supply method includes:
and controlling the magnitude of the current output by the second end of the first power supply circuit and the second end of the second power supply circuit, so that the voltage of the second end of the second power supply circuit is smaller than the voltage of the input end of the pixel driving circuit.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, the program or instructions implement the steps of the method according to the second aspect.
In a fourth aspect, the present application provides a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method according to the second aspect.
In a fifth aspect, the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the second aspect.
In the embodiment of the application, the problem of flicker of the display screen caused by floating of the output voltage of the charging IC can be solved under the condition of not reducing the charging current of the battery.
Drawings
FIG. 1 is a schematic diagram of a pixel driving circuit in the prior art;
FIG. 2 is a schematic diagram of a power supply circuit of the pixel driving circuit;
FIG. 3 is a schematic diagram of the DC-DC converter circuit operating in a synchronous mode;
FIG. 4 is a schematic diagram of the DC-DC converter circuit operating in an asynchronous mode;
FIG. 5 is a schematic diagram of a power supply circuit of a pixel driving circuit under two charging IC structures;
fig. 6 is a schematic current flow diagram of a power supply circuit according to an embodiment of the present disclosure;
fig. 7 is a second schematic diagram illustrating a current flow of the power supply circuit according to the embodiment of the present application;
fig. 8 is a schematic flowchart of a power supply method according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 10 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.
Detailed Description
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, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The power supply circuit, the power supply method, and the electronic device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Fig. 1 is a schematic structural diagram of a pixel driving circuit in the prior art. As shown in FIG. 1, the pixel driving circuit of the display panel includes a first transistor T1A second transistor T2And a storage capacitor CstAnd a data capacitor CdataWherein the pixel drive circuitThe positive terminal driving voltage ELVDD and the negative terminal driving voltage ELVSS are directly connected to the first transistor T of the pixel driving circuit1The source (S pole) and the drain (D pole) of (a) are turned on and off by their internal voltage conversion circuits. Jitter of the positive side driving voltage ELVDD will affect the first transistor T1Vgs voltage of due to the first transistor T1Operating in the constant current region, the fluctuations of the Vgs voltage affect the current flowing through the light emitting diode OLED, causing the user to observe a flicker, and therefore, the positive side driving voltage ELVDD is very sensitive to ripples and transient disturbances.
Referring to fig. 2 to 4, fig. 2 is a schematic diagram of a power supply circuit of a pixel driving circuit, fig. 3 is a schematic diagram of a dc-dc conversion circuit operating in a synchronous mode, and fig. 4 is a schematic diagram of a dc-dc conversion circuit operating in an asynchronous mode. As shown in fig. 2, a charging IC (Integrated circuit) is used to supply power to the pixel driving circuit, the charging IC is connected to an external power source (e.g., a charger), an output terminal of the charging IC outputs a positive driving voltage ELVDD via a dc-dc conversion circuit to provide the positive driving voltage for the pixel driving circuit, and the output terminal of the charging IC also charges the battery 1; thus, during charging, the output voltage VPH of the charging IC is equal to V1+I*R1Wherein V is1Is the voltage of the battery 1, R1Transistor Q between the output of the IC and the battery 1 for charging1When the battery 1 is continuously charged by the charging IC, the charge of the battery 1 gradually increases, and the dc-dc converter circuit operates in the synchronous mode shown in fig. 3, and when the charge of the battery 1 reaches a higher value, the output voltage VPH of the charging IC is closer to the positive driving voltage ELVDD of the pixel driving circuit, and the dc-dc converter circuit changes from the synchronous mode to the asynchronous mode, and the positive driving voltage ELVDD rises along with the output voltage VPH of the charging IC, and when the positive driving voltage ELVDD rises to a certain value, the dc-dc converter circuit stops the switching operation, and the positive driving voltage ELVDD drops to affect the Vgs voltage of the pixel driving circuit, thereby affecting the flowing of the light-emitting diode through the pixel driving circuitThe current through the diode OLED, causing the user to observe a flash screen.
Fig. 5 is a schematic structural diagram of a power supply circuit of a pixel driving circuit under two charging IC structures. As shown in fig. 5, in the case of an electronic device having two charging ICs, the pixel driving circuit is powered by the charging IC1, where the charging IC1 and the charging IC2 are both connected to an external power source (e.g., a charger), the output terminal of the charging IC1 outputs the positive-side driving voltage ELVDD via the dc-dc conversion circuit to provide the positive-side driving voltage for the pixel driving circuit, and meanwhile, the output terminal of the charging IC1 also charges the battery 1 and supplies power to other loads of the system, and the output terminal of the charging IC2 also charges the battery 1. It can be known that the power supply portion of the pixel driving circuit in the power supply circuit structure of fig. 5 is not changed, so that the above-mentioned problem still exists, that is, the positive side driving voltage ELVDD will rise along with the output end voltage VPH of the charging IC1, when the positive side driving voltage ELVDD rises to a certain value, the dc-dc conversion circuit will stop the switching action, and the positive side driving voltage ELVDD will fall, so as to affect the Vgs voltage in the pixel driving circuit, and further affect the current flowing through the light emitting diode OLED, and thus the user observes the flash.
Therefore, referring to fig. 6 and fig. 7, fig. 6 is a first schematic current flow diagram of the power supply circuit provided in the embodiment of the present application, and fig. 7 is a second schematic current flow diagram of the power supply circuit provided in the embodiment of the present application. As shown in fig. 6 and 7, the power supply circuit in the embodiment of the present application may be applied to an electronic device, and the power supply circuit may include:
a first power supply circuit M1 and a second power supply circuit M2, wherein a first end of the first power supply circuit M1 and a first end of the second power supply circuit M2 are both connected to an external power supply, a second end of the first power supply circuit M1 is connected to a first load via a first branch and to a charging terminal of the battery 1 via a second branch, and a second end of the second power supply circuit M2 is connected to the charging terminal of the battery 1 via a third branch and to an input terminal of the pixel driving circuit via a fourth branch;
and the controller is used for controlling the current output by the second end of the first power supply circuit M1 and the second end of the second power supply circuit M2 to enable the voltage of the second end of the second power supply circuit M2 to be smaller than the voltage of the input end of the pixel driving circuit.
In this embodiment, the first power supply circuit M1 and the second power supply circuit M2 may be two charging ICs of an electronic device, the external power source connected to the first end of the first power supply circuit M1 and the first end of the second power supply circuit M2 may be a charger, that is, the charger may supply power to the electronic device through the first power supply circuit M1 and/or the second power supply circuit M2, in this case, the first end of the first power supply circuit M1 and the first end of the second power supply circuit M2 are input ends, the second end of the first power supply circuit M1 and the second end of the second power supply circuit M2 are output ends, in this embodiment, the voltage of the second end of the first power supply circuit M1 is referred to as VPH1, and the voltage of the second end of the second power supply circuit M2 is referred to as VPH 2. Since the second end of the first power supply circuit M1 is connected to the charging terminal of the battery 1 via the second branch, and the second end of the second power supply circuit M2 is connected to the charging terminal of the battery 1 via the third branch, the second end of the first power supply circuit M1 and the second end of the second power supply circuit are connected via the second branch and the third branch, and the first power supply circuit M1 and the second power supply circuit M2 can both charge the battery 1, and during the charging process, the charging currents of the first power supply circuit M1 and the second power supply circuit M2 can be set respectively.
In this embodiment, the second terminal of the first power supply circuit M1 is connected to a first load through a first branch, and the first load may be other loads except for the pixel driving circuit in the electronic device. The second end of the second power supply circuit M2 is connected to an input terminal of a pixel driving circuit (not shown in the figure) through a fourth branch, a voltage of the input terminal of the pixel driving circuit is referred to as ELVDD, the pixel driving circuit is a driving circuit of a display screen of an electronic device and is configured to drive the display screen to emit light, the pixel driving circuit may adopt a structure such as 3T1C, 6T1C, 7T1C, and the like, which is not limited in this embodiment of the application.
The second branch may include a first switching tube K1, the third branch may include a second switching tube K2, that is, the second terminal of the first power supply circuit M1 is connected to the charging terminal of the battery 1 via the first switching tube K1, the second terminal of the second power supply circuit M2 is connected to the charging terminal of the battery 1 via the second switching tube K2, and the second terminal of the first power supply circuit M1 is connected to the charging terminal of the battery 1 via the first switching tube K1 and the second switching tube K2.
In addition, the fourth branch may include a first inductor L1, a first capacitor C1, a second capacitor C2, a third switch tube K3, and a fourth switch tube K4, a second terminal of the second power supply circuit M2 is respectively connected to the first terminal of the first capacitor C1 and the first terminal of the first inductor L1, a second terminal of the first capacitor C1 is grounded, a second terminal of the first inductor L1 is respectively connected to the first terminal of the third switch tube K3 and the first terminal of the fourth switch tube K4, a second terminal of the third switch tube K3 is grounded, a second terminal of the fourth switch tube K4 is respectively connected to the input terminal of the pixel driving circuit and the first terminal of the second capacitor C2, and a second terminal of the second capacitor C2 is grounded. It can be known that the fourth branch is a dc-dc conversion circuit for outputting a stable voltage (i.e., ELVDD) to the pixel driving circuit.
Optionally, the first switch tube K1, the second switch tube K2, the third switch tube K3 and the fourth switch tube K4 may be transistors, such as P-MOSFET, N-MOSFET, etc.
In the embodiment of the present application, the power supply circuit may further include a detector for detecting a second terminal voltage (VPH2) of the second power supply circuit and an input terminal voltage (ELVDD) of the pixel driving circuit, and a comparator for comparing magnitudes of the second terminal voltage (VPH2) of the second power supply circuit and the input terminal voltage (ELVDD) of the pixel driving circuit.
In the charging process, when the electric quantity of the battery 1 is high, the voltage ELVDD at the input end of the pixel driving circuit will rise along with the voltage VPH2 at the second end of the second power supply circuit M2, so that a user can observe a splash screen. The control principle described above is stated case by case in the following.
In an alternative embodiment, as shown in fig. 6, during the charging process, in case that the second terminal voltage VPH2 of the second power supply circuit M2 is less than the difference between the input terminal voltage ELVDD of the pixel driving circuit and the first threshold value Vth (i.e., VPH2 < ELVDD-Vth), the second terminal of the first power supply circuit M1 is controlled to output the first current I1Controlling the second end of the second power supply circuit M2 to output the second current I2Controlling the first branch circuit to be conducted to supply power to the first load, controlling the second branch circuit and the third branch circuit to be conducted, charging the battery 1 by using the first power supply circuit M1 and the second power supply circuit M2, controlling the fourth branch circuit to be conducted to supply power to the pixel driving circuit, that is, supplying power to the pixel driving circuit by using the second power supply circuit M2, wherein at this time, VPH2 ═ V1+I*RK2Due to the voltage V of the battery 1 at this time1Low, therefore VPH2 < ELVDD, does not cause the problem of screen flicker; as the charging time increases, as shown in fig. 7, in the case that the second terminal voltage VPH2 of the second power supply circuit M2 is equal to the difference between the input terminal voltage ELVDD of the pixel driving circuit and the first threshold value Vth (i.e., VPH2 is ELVDD-Vth), the battery 1 is already close to the full charge state, and if the second power supply circuit M2 is continuously used to supply power to the pixel driving circuit, VPH2 is close to the ELVDD voltage, so that a flash easily occurs, and since the battery 1 is already close to the full charge, the currents output by the first power supply circuit M1 and the second power supply circuit M2 are not large, the current of the second power supply circuit M2 may also be distributed to the first power supply circuit M1, and the second power supply circuit M2 is turned off, that is, the second terminal of the first power supply circuit M1 is controlled to output the third current I3Controlling the second power supply circuit M2 to be turned off, the first branch to be turned on to supply power to the first load, the second branch to be turned on to charge the battery 1, and the third branch to be turned on, so that the first power supply circuit M1 supplies power to the pixel driving circuit through the second branch, the third branch and the fourth branch, wherein a third current I3＝I1+I2That is to sayIn this case, the second power supply circuit M2 no longer outputs a voltage, but supplies power to the pixel driving circuit through the first power supply circuit M1, where VPH2 is equal to V1-I*RK2Wherein V is1Is the voltage of the battery 1, RK2Is the resistance of the second switching tube K2, therefore, the flicker is not caused, so that the flicker problem is solved without reducing the total output current of the first power supply circuit M1 and the second power supply circuit M2.
In another alternative embodiment, as shown in fig. 7, in the case that the voltage of the second terminal of the second power supply circuit M2 is equal to the difference between the voltage of the input terminal of the pixel driving circuit and the first threshold value (i.e. VPH2 is ELVDD-Vth), the second terminal of the first power supply circuit M1 is controlled to output the fourth current I4Controlling the second end of the second power supply circuit M2 to output a fifth current I5Controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery 1, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit, wherein a fourth current I4＝I1+. DELTA.I, fifth Current I5＝I2-△I，0＜△I＜I2(ii) a That is, when the charge of the battery 1 is low, the power supply mode in fig. 6 is adopted, specifically, as described above, and when the battery 1 is nearly fully charged, the power supply mode in fig. 6 is still adopted, except that the current output from the second terminal of the second power supply circuit M2 is reduced by Δ I, and the current output from the second terminal of the first power supply circuit M1 is increased by Δ I, so that the problem of the splash screen can be solved as well, and the total output current of the first power supply circuit M1 and the second power supply circuit M2 remains unchanged.
In another alternative embodiment of the present application, the power supply manner shown in fig. 7 is adopted during the whole charging process, that is, the second end of the first power supply circuit M1 is controlled to output the sixth current I6Controlling the second power supply circuit M2 to be turned off, the first branch to be turned on to supply power to the first load, the second branch to be turned on to charge the battery 1, and the third branch to be turned onConducting to enable the first power supply circuit to supply power to the pixel driving circuit through the second branch, the third branch and the fourth branch; at this time, the second power supply circuit M2 outputs no current, and the first power supply circuit M1 is used to supply power to the battery 1, the first load, and the pixel driving circuit, so that the problem of the flash screen can be solved as well.
In this embodiment, the second terminal of the second power supply circuit M2 is further connected to an input terminal of a target dc-dc conversion circuit, and the target dc-dc conversion circuit is a dc-dc conversion circuit having an input voltage and an output voltage close to the voltage of the battery 1, so as to solve the problem of unstable output voltage.
In the embodiment of the application, the problem of flicker of the display screen caused by floating of the output voltage of the charging IC can be solved under the condition of not reducing the charging current of the battery.
Please refer to fig. 8, which is a flowchart illustrating a power supply method provided in an embodiment of the present application. The power supply method in the embodiment of the application may include:
step 81: and controlling the magnitude of the current output by the second end of the first power supply circuit and the second end of the second power supply circuit, so that the voltage of the second end of the second power supply circuit is smaller than the voltage of the input end of the pixel driving circuit.
Optionally, the step of controlling the magnitudes of the currents output by the second terminal of the first power supply circuit and the second terminal of the second power supply circuit to make the voltage of the second terminal of the second power supply circuit smaller than the voltage of the input terminal of the pixel driving circuit includes:
under the condition that the voltage of the second end of the second power supply circuit is smaller than the difference between the voltage of the input end of the pixel driving circuit and a first threshold value, controlling the second end of the first power supply circuit to output a first current I1, controlling the second end of the second power supply circuit to output a second current I2, controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit;
and under the condition that the voltage at the second end of the second power supply circuit is equal to the difference between the voltage at the input end of the pixel driving circuit and a first threshold value, controlling the second end of the first power supply circuit to output a third current I3, controlling the second power supply circuit to be switched off, controlling the first branch to be switched on to supply power to the first load, controlling the second branch to be switched on to charge the battery, and controlling the third branch to be switched on so that the first power supply circuit supplies power to the pixel driving circuit through the second branch, the third branch and the fourth branch, wherein the third current I3 is I1+ I2.
Optionally, the step of controlling the magnitudes of the currents output by the second terminal of the first power supply circuit and the second terminal of the second power supply circuit to make the voltage of the second terminal of the second power supply circuit smaller than the voltage of the input terminal of the pixel driving circuit includes:
under the condition that the second terminal voltage of the second power supply circuit is smaller than the difference between the input terminal voltage of the pixel driving circuit and a first threshold value, enabling the second terminal of the first power supply circuit to output a first current I1, enabling the second terminal of the second power supply circuit to output a second current I2, controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit;
under the condition that the voltage of the second end of the second power supply circuit is equal to the difference between the voltage of the input end of the pixel driving circuit and a first threshold value, controlling the second end of the first power supply circuit to output a fourth current I4, controlling the second end of the second power supply circuit to output a fifth current I5, controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit, wherein the fourth current I4＝I1+. DELTA.I, fifth Current I5＝I2-△I，0＜△I＜I2。
Optionally, the step of controlling the magnitudes of the currents output by the second terminal of the first power supply circuit and the second terminal of the second power supply circuit to make the voltage of the second terminal of the second power supply circuit smaller than the voltage of the input terminal of the pixel driving circuit includes:
controlling a second end of the first power supply circuit to output a sixth current I6, controlling the second power supply circuit to be switched off, controlling the first branch to be switched on to supply power to the first load, controlling the second branch to be switched on to charge the battery, and controlling the third branch to be switched on to enable the first power supply circuit to supply power to the pixel driving circuit through the second branch, the third branch and the fourth branch.
The power supply method in the embodiment of the present application may be applied to the power supply circuit in the above embodiment, and the detailed steps thereof are as described in each process that can be implemented by the controller in the above embodiment, and the same technical effects can be achieved, and are not described herein again.
In the embodiment of the application, the problem of flicker of the display screen caused by floating of the output voltage of the charging IC can be solved under the condition of not reducing the charging current of the battery.
Optionally, the present application further provides an electronic device, where the electronic device includes the power supply circuit in the foregoing embodiment, and the same technical effect can be achieved, and for avoiding repetition, details are not repeated here.
Optionally, as shown in fig. 9, an electronic device 900 is further provided in this embodiment of the present application, and includes a processor 901, a memory 902, and a program or an instruction stored in the memory 902 and executable on the processor 901, where the program or the instruction is executed by the processor 901 to implement each process of the foregoing power supply method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
It should be noted that the electronic device in the embodiment of the present application includes the mobile electronic device and the non-mobile electronic device described above.
Fig. 10 is a schematic diagram of a hardware structure of an electronic device implementing an embodiment of the present application.
The electronic device 100 includes, but is not limited to: a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, and a processor 110.
Those skilled in the art will appreciate that the electronic device 100 may further comprise a power source (e.g., a battery) for supplying power to various components, and the power source may be logically connected to the processor 110 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The electronic device structure shown in fig. 10 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is not repeated here.
The processor 110 is configured to control magnitudes of currents output by the second terminal of the first power supply circuit and the second terminal of the second power supply circuit, so that a voltage of the second terminal of the second power supply circuit is smaller than a voltage of the input terminal of the pixel driving circuit.
In the embodiment of the application, the problem of flicker of the display screen caused by floating of the output voltage of the charging IC can be solved under the condition of not reducing the charging current of the battery.
Optionally, the step of controlling the magnitudes of the currents output by the second terminal of the first power supply circuit and the second terminal of the second power supply circuit to make the voltage of the second terminal of the second power supply circuit smaller than the voltage of the input terminal of the pixel driving circuit includes:
under the condition that the voltage of the second end of the second power supply circuit is smaller than the difference between the voltage of the input end of the pixel driving circuit and a first threshold value, controlling the second end of the first power supply circuit to output a first current I1, controlling the second end of the second power supply circuit to output a second current I2, controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit;
and under the condition that the voltage at the second end of the second power supply circuit is equal to the difference between the voltage at the input end of the pixel driving circuit and a first threshold value, controlling the second end of the first power supply circuit to output a third current I3, controlling the second power supply circuit to be switched off, controlling the first branch to be switched on to supply power to the first load, controlling the second branch to be switched on to charge the battery, and controlling the third branch to be switched on so that the first power supply circuit supplies power to the pixel driving circuit through the second branch, the third branch and the fourth branch, wherein the third current I3 is I1+ I2.
Optionally, the step of controlling the magnitudes of the currents output by the second terminal of the first power supply circuit and the second terminal of the second power supply circuit to make the voltage of the second terminal of the second power supply circuit smaller than the voltage of the input terminal of the pixel driving circuit includes:
under the condition that the second terminal voltage of the second power supply circuit is smaller than the difference between the input terminal voltage of the pixel driving circuit and a first threshold value, enabling the second terminal of the first power supply circuit to output a first current I1, enabling the second terminal of the second power supply circuit to output a second current I2, controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit;
under the condition that the voltage of the second end of the second power supply circuit is equal to the difference between the voltage of the input end of the pixel driving circuit and a first threshold value, controlling the second end of the first power supply circuit to output a fourth current I4, controlling the second end of the second power supply circuit to output a fifth current I5, controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit, wherein the fourth current I4＝I1+. DELTA.I, fifth Current I5＝I2-△I，0＜△I＜I2。
Optionally, the step of controlling the magnitudes of the currents output by the second terminal of the first power supply circuit and the second terminal of the second power supply circuit to make the voltage of the second terminal of the second power supply circuit smaller than the voltage of the input terminal of the pixel driving circuit includes:
controlling a second end of the first power supply circuit to output a sixth current I6, controlling the second power supply circuit to be switched off, controlling the first branch to be switched on to supply power to the first load, controlling the second branch to be switched on to charge the battery, and controlling the third branch to be switched on to enable the first power supply circuit to supply power to the pixel driving circuit through the second branch, the third branch and the fourth branch.
It should be understood that, in the embodiment of the present application, the input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the Graphics Processing Unit 1041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 107 includes a touch panel 1071 and other input devices 1072. The touch panel 1071 is also referred to as a touch screen. The touch panel 1071 may include two parts of a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein. The memory 109 may be used to store software programs as well as various data including, but not limited to, application programs and an operating system. The processor 110 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above power supply method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the above power supply method embodiment, and can achieve the same technical effect, and the details are not repeated here to avoid repetition.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A power supply circuit, comprising:
the first end of the first power supply circuit and the first end of the second power supply circuit are both connected with an external power supply, the second end of the first power supply circuit is connected with a first load through a first branch circuit and is connected with a charging end of a battery through a second branch circuit, and the second end of the second power supply circuit is connected with the charging end of the battery through a third branch circuit and is connected with the input end of the pixel driving circuit through a fourth branch circuit;
and the controller is used for controlling the current output by the second end of the first power supply circuit and the second end of the second power supply circuit, so that the voltage of the second end of the second power supply circuit is smaller than the voltage of the input end of the pixel driving circuit.
2. The power supply circuit of claim 1, wherein the second branch comprises a first switch tube and the third branch comprises a second switch tube.
3. The power supply circuit of claim 1, wherein the fourth branch comprises a first inductor, a first capacitor, a second capacitor, a third switch tube and a fourth switch tube, a second end of the second power supply circuit is connected to the first end of the first capacitor and the first end of the first inductor respectively, a second end of the first capacitor is grounded, a second end of the first inductor is connected to the first end of the third switch tube and the first end of the fourth switch tube respectively, a second end of the third switch tube is grounded, a second end of the fourth switch tube is connected to the input end of the pixel driving circuit and the first end of the second capacitor respectively, and a second end of the second capacitor is grounded.
4. The power supply circuit of claim 1, wherein the second terminal of the second power supply circuit is further connected to an input terminal of a target dc-dc converter circuit.
5. The power supply circuit of claim 1, further comprising:
a detector for detecting a second terminal voltage of the second power supply circuit and an input terminal voltage of the pixel driving circuit;
and the comparator is used for comparing the voltage of the second end of the second power supply circuit with the voltage of the input end of the pixel driving circuit.
6. A power supply method applied to the power supply circuit according to any one of claims 1 to 5, comprising:
and controlling the magnitude of the current output by the second end of the first power supply circuit and the second end of the second power supply circuit, so that the voltage of the second end of the second power supply circuit is smaller than the voltage of the input end of the pixel driving circuit.
7. The power supply method according to claim 6, wherein the step of controlling the magnitudes of the currents output by the second terminals of the first and second power supply circuits so that the voltage of the second terminal of the second power supply circuit is smaller than the voltage of the input terminal of the pixel driving circuit comprises:
controlling the second end of the first power supply circuit to output a first current I under the condition that the voltage of the second end of the second power supply circuit is smaller than the difference between the voltage of the input end of the pixel driving circuit and a first threshold value1Controlling the second end of the second power supply circuit to output a second current I2Controlling the first branch circuit to be conducted to supply power to the first load, controlling the second branch circuit and the third branch circuit to be conducted to charge the battery, and controlling the fourth branch circuit to be conducted to supply power to the pixel driving circuit;
controlling the second end of the first power supply circuit to output a third current I under the condition that the voltage of the second end of the second power supply circuit is equal to the difference between the voltage of the input end of the pixel driving circuit and a first threshold value3Controlling the second power supply circuit to be disconnected, controlling the first branch circuit to be connected to supply power to the first load, controlling the second branch circuit to be connected to charge the battery, and controlling the third branch circuit to be connected to enable the first power supply circuit to supply power to the pixel driving circuit through the second branch circuit, the third branch circuit and the fourth branch circuit, wherein a third current I is3＝I1+I2。
8. The power supply method according to claim 6, wherein the step of controlling the magnitudes of the currents output by the second terminals of the first and second power supply circuits so that the voltage of the second terminal of the second power supply circuit is smaller than the voltage of the input terminal of the pixel driving circuit comprises:
when the voltage of the second end of the second power supply circuit is smaller than the difference between the voltage of the input end of the pixel driving circuit and the first threshold value, the second end of the first power supply circuit outputs a first current I1A second end of the second power supply circuit outputs a second current I2Controlling the first branch to conduct to the first branchThe load supplies power, the second branch circuit and the third branch circuit are controlled to be conducted to charge the battery, and the fourth branch circuit is controlled to be conducted to supply power to the pixel driving circuit;
controlling the second end of the first power supply circuit to output a fourth current I under the condition that the voltage of the second end of the second power supply circuit is equal to the difference between the voltage of the input end of the pixel driving circuit and a first threshold value4Controlling the second end of the second power supply circuit to output a fifth current I5Controlling the first branch to be conducted to supply power to the first load, controlling the second branch and the third branch to be conducted to charge the battery, and controlling the fourth branch to be conducted to supply power to the pixel driving circuit, wherein a fourth current I4＝I1+. DELTA.I, fifth Current I5＝I2-△I，0＜△I＜I2。
9. The power supply method according to claim 6, wherein the step of controlling the magnitudes of the currents output by the second terminals of the first and second power supply circuits so that the voltage of the second terminal of the second power supply circuit is smaller than the voltage of the input terminal of the pixel driving circuit comprises:
controlling the second end of the first power supply circuit to output a sixth current I6And controlling the second power supply circuit to be disconnected, controlling the first branch circuit to be connected to supply power to the first load, controlling the second branch circuit to be connected to charge the battery, and controlling the third branch circuit to be connected to enable the first power supply circuit to supply power to the pixel driving circuit through the second branch circuit, the third branch circuit and the fourth branch circuit.
10. An electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the power supply method according to any one of claims 6-9.
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