CN111324163B - Voltage regulation method, voltage regulation circuit and display device - Google Patents
Voltage regulation method, voltage regulation circuit and display device Download PDFInfo
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- CN111324163B CN111324163B CN202010125319.2A CN202010125319A CN111324163B CN 111324163 B CN111324163 B CN 111324163B CN 202010125319 A CN202010125319 A CN 202010125319A CN 111324163 B CN111324163 B CN 111324163B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
Abstract
The application discloses a voltage regulation method, a voltage regulation circuit and a display device, which are used for regulating the duty ratio of driving voltage and avoiding causing poor display. The voltage regulation method provided by the embodiment of the application comprises the following steps: determining a difference between a maximum value and a minimum value of the driving voltage signal of the power source terminal; and adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a voltage adjusting method, a voltage adjusting circuit and a display device.
Background
The driving voltage is the basis of the normal work of a thin film transistor-liquid crystal display (TFT-LCD) display product, and the stable driving voltage is related to whether the TFT-LCD can work normally or not and whether the TFT-LCD can have good visual perception or not. An integrated circuit is a mode for providing a driving voltage, various boosting modules are inevitably used in the integrated circuit, and an initial mode can be set according to different modules when components leave a factory, but the integrated circuit may not be in an optimal state. If the initial mode setting of the device is not good, the driving voltage may fluctuate, and too much fluctuation of the driving voltage may cause a phenomenon of poor horizontal stripe display or failure of normally driving the pixel to emit light.
In summary, the display product in the prior art has the problem of poor display caused by large fluctuation of the driving voltage, which affects the display effect and the user experience.
Disclosure of Invention
The embodiment of the application provides a voltage regulation method, a voltage regulation circuit and a display device, which are used for regulating the duty ratio of driving voltage and avoiding causing poor display.
The voltage regulation method provided by the embodiment of the application comprises the following steps:
determining a difference between a maximum value and a minimum value of the driving voltage signal of the power source terminal;
and adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal.
According to the voltage regulation method provided by the embodiment of the application, after the difference between the maximum value and the minimum value of the driving voltage signal is determined, the duty ratio of the driving voltage signal is regulated according to the difference between the maximum value and the minimum value of the driving voltage signal. Therefore, the display defect caused by too large fluctuation amplitude of the driving voltage signal can be avoided. The power consumption can also be reduced by adjusting the duty cycle of the driving voltage signal in the case that the driving voltage signal fluctuation amplitude meets the display requirement. In addition, the voltage adjusting method provided by the embodiment of the application can continuously adjust the adjusted driving voltage signal so that the driving voltage signal meets the requirement, thereby realizing the self-adaptive adjustment of the driving voltage signal.
Optionally, the determining a difference between a maximum value and a minimum value of the driving voltage signal of the power source terminal specifically includes:
acquiring the maximum value and the minimum value of a voltage reduction signal of the driving voltage signal;
and determining the difference between the maximum value and the minimum value of the driving voltage signal according to the maximum value and the minimum value of the voltage reduction signal.
Optionally, the adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal specifically includes:
obtaining an amplified signal of a difference between a maximum value and a minimum value of the driving voltage signal and a difference of a reference signal at a reference signal end;
determining whether the voltage of the amplified signal is greater than the voltage of a first oscillating signal at a first oscillating signal end, selecting to output a low-level signal when the voltage of the amplified signal is greater than the voltage of the first oscillating signal, and selecting to output a high-level signal when the voltage of the amplified signal is less than the voltage of the first oscillating signal;
determining a duty ratio according to the proportion of the high-level signal, and generating a duty ratio regulation square wave driving signal corresponding to the duty ratio;
and adjusting the duty ratio of the driving voltage signal according to the duty ratio adjusting square wave driving signal.
The voltage regulation circuit that this application embodiment provided, voltage regulation circuit includes: the driving voltage difference value calculation module and the driving voltage regulation module;
the driving voltage difference value calculating module is used for: determining the difference between the maximum value and the minimum value of a driving voltage signal of a power supply end, and outputting the difference between the maximum value and the minimum value of the driving voltage signal to the driving voltage regulating module;
the voltage regulation module is used for: and receiving the difference between the maximum value and the minimum value of the driving voltage signal, and adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal.
The voltage regulating circuit provided by the embodiment of the application can determine the difference between the maximum value and the minimum value of the driving voltage signal and regulate the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal. Therefore, the display defect caused by too large fluctuation amplitude of the driving voltage signal can be avoided. The power consumption can also be reduced by adjusting the duty cycle of the driving voltage signal in the case that the driving voltage signal fluctuation amplitude meets the display requirement. In addition, the voltage regulating circuit provided by the embodiment of the application can continuously regulate the regulated driving voltage signal so that the driving voltage signal meets the requirement, thereby realizing the self-adaptive regulation of the driving voltage signal.
Optionally, the driving voltage difference value calculating module includes: the voltage identification and sampling module and the difference value calculation module are connected with the voltage identification and sampling module;
the voltage identification and sampling module is used for: acquiring the maximum value and the minimum value of a voltage reduction signal of the driving voltage signal; the maximum value and the minimum value of the input voltage reduction signals are output to the difference value calculation module;
the difference calculation module is configured to: and determining the difference between the maximum value and the minimum value of the driving voltage signal according to the maximum value and the minimum value of the input buck signal, and outputting the difference between the maximum value and the minimum value of the driving voltage signal to the driving voltage regulating module.
Optionally, the voltage regulating circuit further comprises: a first resistor and a second resistor, a first terminal of the first resistor being coupled to the power supply terminal, a second terminal of the first resistor being coupled to the second resistor, and a second terminal of the second resistor being grounded;
the voltage identification and sampling module comprises: a voltage identification and sampling processor;
the input end of the voltage identification and sampling processor is coupled with the second end of the first resistor and used for receiving the voltage reduction signal;
the first output end of the voltage identification and sampling processor is used for outputting the maximum value of the voltage reduction signal to the difference value calculation module;
and the second output end of the voltage identification and sampling processor is used for outputting the minimum value of the voltage reduction signal to the difference value calculation module.
Optionally, the difference calculating module includes: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first selector and a calculating unit;
a first end of the third resistor is used for receiving the maximum value of the voltage reduction signal, and a second end of the third resistor is coupled with the non-inverting end of the first selector;
a first terminal of the fourth resistor is configured to receive a minimum value of the buck signal, and a second terminal of the fourth resistor is coupled to the non-inverting terminal of the first selector;
a first end of the fifth resistor is coupled to a second end of the third resistor, and the second end of the fifth resistor is grounded;
a first terminal of the sixth resistor is coupled to a second terminal of the fourth resistor, and a second terminal of the sixth resistor is coupled to an output terminal of the first selector;
the output end of the first selector is used for outputting a first difference signal to the input end of the computing unit;
the computing unit is to: and determining the difference between the maximum value and the minimum value of the buck signal according to the first difference signal, and determining and outputting the difference between the maximum value and the minimum value of the drive voltage signal according to the difference between the maximum value and the minimum value of the buck signal.
Optionally, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor satisfy the following condition:
wherein r3 is the resistance value of the third resistor, and r4 is the resistance value of the fourth resistor; r5 is the resistance of the fifth resistor; r6 is the resistance of the sixth resistor.
Optionally, the voltage regulation module comprises: the circuit comprises a first amplifier, a second selector, a seventh resistor, a first capacitor, a signal output unit, a first switch and a second switch;
the inverting terminal of the first amplifier is used for receiving the difference between the maximum value and the minimum value of the driving voltage signal, and the non-inverting terminal of the first amplifier is used for receiving a first reference signal of a reference signal terminal; the output end of the first amplifier is coupled with the non-inverting end of the second selector and used for outputting an amplified signal;
a first end of the seventh resistor is coupled to the non-inverting terminal of the first amplifier, a second end of the seventh resistor is coupled to the first stage of the first capacitor, and a second stage of the first capacitor is grounded;
the inverting terminal of the second selector is configured to receive the first oscillating signal of the first oscillating signal terminal;
an output of the second selector is to: when the voltage of the amplified signal is greater than the voltage of the first oscillating signal, selectively outputting a low-level signal; when the voltage of the amplified signal is less than the voltage of the first oscillating signal, selectively outputting a high-level signal;
the input end of the signal output unit is coupled with the output end of the second selector, and the signal output unit is used for determining the duty ratio of the driving voltage signal according to the proportion of the high-level signal and generating and outputting a duty ratio regulation square wave driving signal corresponding to the duty ratio;
a control end of the first switch is coupled to an output end of the signal output unit, a first end of the first switch is used for inputting a second oscillation signal of a second oscillation signal end, and a second end of the first switch is grounded; the first switch is used for: when the duty ratio adjusting square wave driving signal is a low-level signal, the duty ratio adjusting square wave driving signal is turned on, and the second oscillation signal end is controlled to be conducted with the ground;
a control terminal of the second switch is coupled to the output terminal of the signal output unit, a first terminal of the second switch is used for inputting a second oscillation signal, and a second terminal of the second switch is coupled to the power supply terminal; the second switch is used for: and when the duty ratio regulation square wave driving signal is a high-level signal, the duty ratio regulation square wave driving signal is turned on, and the second oscillation signal end is controlled to be conducted with the power supply end.
Optionally, the first switch is an N-type transistor, and the second switch is a P-type transistor.
The display device provided by the embodiment of the application comprises the voltage regulating circuit provided by the embodiment of the application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a voltage regulation method according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a voltage regulation circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another voltage regulating circuit according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a voltage regulation circuit according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a voltage regulation circuit according to an embodiment of the present disclosure;
fig. 6 is a relationship diagram of an amplified signal, a first oscillating signal and a square wave driving signal according to an embodiment of the disclosure.
Detailed Description
An embodiment of the present application provides a voltage regulation method, as shown in fig. 1, the method includes:
s101, determining the difference between the maximum value and the minimum value of a driving voltage signal of a power supply end;
and S102, adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal.
According to the voltage regulation method provided by the embodiment of the application, after the difference between the maximum value and the minimum value of the driving voltage signal is determined, the duty ratio of the driving voltage signal is regulated according to the difference between the maximum value and the minimum value of the driving voltage signal. Therefore, the display defect caused by too large fluctuation amplitude of the driving voltage signal can be avoided. The power consumption can also be reduced by adjusting the duty cycle of the driving voltage signal in the case that the driving voltage signal fluctuation amplitude meets the display requirement. In addition, the voltage adjusting method provided by the embodiment of the application can continuously adjust the adjusted driving voltage signal so that the driving voltage signal meets the requirement, thereby realizing the self-adaptive adjustment of the driving voltage signal.
In specific implementation, when the difference between the maximum value and the minimum value of the driving voltage signal is larger than a first preset value, the duty ratio of the driving voltage signal is increased, and when the difference between the maximum value and the minimum value of the driving voltage signal is smaller than the first preset value, the duty ratio of the driving voltage signal is decreased. The first preset value may be, for example, 0.2 volts (V).
Optionally, the determining a difference between the maximum value and the minimum value of the driving voltage signal of the power source end in step S102 specifically includes:
s1021, acquiring the maximum value and the minimum value of the voltage reduction signal of the driving voltage signal;
and S1022, determining the difference between the maximum value and the minimum value of the driving voltage signal according to the maximum value and the minimum value of the voltage reduction signal.
Optionally, the adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal in step S101 specifically includes:
s1011, obtaining an amplified signal of the difference between the maximum value and the minimum value of the driving voltage signal and the difference of the reference signal at the reference signal end;
s1012, determining whether the voltage of the amplified signal is greater than the voltage of a first oscillating signal at a first oscillating signal end, selecting to output a low level signal when the voltage of the amplified signal is greater than the voltage of the first oscillating signal, and selecting to output a high level signal when the voltage of the amplified signal is less than the voltage of the first oscillating signal;
s1013, determining a duty ratio according to the proportion of the high-level signal, and generating a duty ratio regulation square wave driving signal corresponding to the duty ratio;
and S1014, adjusting the duty ratio of the driving voltage signal according to the duty ratio adjusting square wave driving signal.
Based on the same inventive concept, an embodiment of the present application further provides a voltage regulating circuit, as shown in fig. 2, the voltage regulating circuit includes: the driving voltage difference value calculating module 1 and the driving voltage adjusting module 2;
the driving voltage difference value calculating module 1 is configured to: determining a difference delta V between a maximum value Vmax and a minimum value Vmin of a driving voltage signal of a power supply terminal AVDD, and outputting the difference delta V between the maximum value and the minimum value of the driving voltage signal to the driving voltage regulating module;
the voltage regulation module 2 is configured to: and receiving the difference delta V between the maximum value and the minimum value of the driving voltage signal, and adjusting the duty ratio of the driving voltage signal according to the difference delta V between the maximum value and the minimum value of the driving voltage signal.
The voltage regulating circuit provided by the embodiment of the application can determine the difference between the maximum value and the minimum value of the driving voltage signal and regulate the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal. Therefore, the display defect caused by too large fluctuation amplitude of the driving voltage signal can be avoided. The power consumption can also be reduced by adjusting the duty cycle of the driving voltage signal in the case that the driving voltage signal fluctuation amplitude meets the display requirement. In addition, the voltage regulating circuit provided by the embodiment of the application can continuously regulate the regulated driving voltage signal so that the driving voltage signal meets the requirement, thereby realizing the self-adaptive regulation of the driving voltage signal.
Alternatively, as shown in fig. 3, the driving voltage difference value calculating module 1 includes: a voltage identification and sampling module 3 and a difference value calculation module 4;
the voltage identification and sampling module 3 is used for: acquiring the maximum V1 and the minimum V2 of a voltage reduction signal of the driving voltage signal; the input maximum value V1 and the input minimum value V2 of the voltage reduction signal are output to the difference value calculation module;
the difference calculation module 4 is configured to: determining a difference Δ V between the maximum value and the minimum value of the driving voltage signal according to the maximum value V1 and the minimum value V2 of the input buck signal, and outputting the difference Δ V between the maximum value and the minimum value of the driving voltage signal to the driving voltage adjusting module 2.
Optionally, as shown in fig. 4, the voltage regulating circuit further includes: a first resistor R1 and a second resistor R2, a first terminal of the first resistor R1 is coupled to the power supply terminal AVDD, a second terminal of the first resistor R1 is coupled to the second resistor R2, and a second terminal of the second resistor R2 is grounded;
the voltage identification and sampling module 3 comprises: a voltage identification and sampling processor 5;
an input terminal of the voltage identification and sampling processor 5 is coupled to a second terminal of the first resistor R1 for receiving the step-down signal;
a first output end of the voltage identification and sampling processor 5 is used for outputting a maximum value V1 of the voltage reduction signal to the difference value calculation module 4;
a second output terminal of the voltage identification and sampling processor 5 is configured to output a minimum value V2 of the buck signal to the difference calculation module 4.
In the voltage driving circuit provided in the embodiment of the application, the maximum value V1 of the step-down signal is Vmax × R1/(R1+ R2), and the minimum value V2 of the step-down signal is Vmin × R1/(R1+ R2), where R1 is a resistance value of the first resistor R1 and R2 is a resistance value of the second resistor R2. The calculation formula of the difference Δ V between the maximum value and the minimum value of the driving voltage signal is as follows:
the formula I is as follows: Δ V ═ (V1-V2) × (1+ r1/r 2).
Optionally, as shown in fig. 4, the difference calculating module 4 includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first selector 6, and a calculation unit 7;
a first terminal of the third resistor R3 is used for receiving the maximum value V1 of the buck signal, and a second terminal of the third resistor R3 is coupled to the non-inverting terminal of the first selector 6;
a first terminal of the fourth resistor R4 is configured to receive the minimum value V2 of the buck signal, and a second terminal of the fourth resistor R4 is coupled to the non-inverting terminal of the first selector 6;
a first end of the fifth resistor R5 is coupled to a second end of the third resistor R3, and a second end of the fifth resistor R5 is grounded;
a first terminal of the sixth resistor R6 is coupled to a second terminal of the fourth resistor R4, and a second terminal of the sixth resistor R6 is coupled to an output terminal of the first selector 6;
the output of the first selector 6 is configured to output a first difference signal V0 to the input of the calculation unit 7;
the calculation unit 7 is configured to: and determining the difference between the maximum value and the minimum value of the buck signal according to the first difference signal V0, and determining and outputting the difference delta V between the maximum value and the minimum value of the drive voltage signal according to the difference between the maximum value and the minimum value of the buck signal.
Optionally, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor satisfy the following condition:
wherein R3 is the resistance value of the third resistor R3, and R4 is the resistance value of the fourth resistor R4; r5 is the resistance of the fifth resistor R5; r6 is the resistance of the sixth resistor R6.
The first difference signal V0 is calculated as:
the formula II is as follows: v0 ═ r6 × (V1-V2)/r 4.
Therefore, the difference between the maximum and minimum values of the buck signal is calculated as:
the formula III is as follows: V1-V2 ═ V0 × r4/r 6.
The calculating unit is specifically configured to calculate a difference between the maximum value and the minimum value of the buck signal according to the first difference signal V0, the resistance value of the fourth resistor, the resistance value of the sixth resistor R6, and a formula three, and then calculate and output a difference Δ V between the maximum value and the minimum value of the drive voltage signal according to a difference between the maximum value and the minimum value of the buck signal, the resistance value of the first resistor R1, the resistance value of the second resistor R2, and a formula one.
Optionally, as shown in fig. 5, the voltage regulation module includes: a first amplifier 8, a second selector 9, a seventh resistor R7, a first capacitor C, a signal output unit 10, a first switch T1, and a second switch T2;
the inverting terminal of the first amplifier 8 is configured to receive a difference Δ V between a maximum value and a minimum value of the driving voltage signal, and the non-inverting terminal of the first amplifier 8 is configured to receive a first reference signal Vref at a reference signal terminal; the output end of the first amplifier 8 is coupled to the non-inverting end of the second selector 9, and is configured to output an amplified signal Vc;
a first terminal of the seventh resistor R7 is coupled to the non-inverting terminal of the first amplifier 8, a second terminal of the seventh resistor R7 is coupled to the first stage of the first capacitor C, and the second stage of the first capacitor C is grounded;
the inverting terminal of the second selector 9 is configured to receive the first oscillating signal V3 of the first oscillating signal terminal;
the output of the second selector 9 is configured to: when the voltage of the amplified signal Vc is greater than the voltage of the first oscillating signal V3, a low-level signal is selected to be output; when the voltage of the amplified signal Vc is less than the voltage of the first oscillating signal V3, a high level signal is selected to be output;
the input end of the signal output unit 10 is coupled to the output end of the second selector 9, and the signal output unit 10 is configured to determine a Duty ratio of the driving voltage signal according to a ratio of the high level signal, and generate and output a Duty ratio adjustment square wave driving signal Duty corresponding to the Duty ratio;
a control terminal of the first switch T1 is coupled to the output terminal of the signal output unit 10, a first terminal of the first switch T1 is configured to input a second oscillating signal LX of a second oscillating signal terminal, and a second terminal of the first switch T1 is coupled to ground; the first switch T1 is configured to: when the duty ratio adjusting square wave driving signal is a low-level signal, the duty ratio adjusting square wave driving signal is turned on, and the second oscillation signal end is controlled to be conducted with the ground;
a control terminal of the second switch T2 is coupled to the output terminal of the signal output unit 10, a first terminal of the second switch T2 is configured to input a second oscillating signal LX, and a second terminal of the second switch T2 is coupled to the power terminal AVDD; the second switch T2 is configured to: and when the duty ratio regulation square wave driving signal is a high-level signal, the duty ratio regulation square wave driving signal is turned on, and the second oscillation signal end is controlled to be conducted with the power supply end.
The relationship between the amplified signal Vc, the first oscillating signal V3 and the square-wave driving signal Duty is shown in fig. 6.
It should be noted that, the difference Δ V between the maximum value and the minimum value of the driving voltage signal is different, the amplified signal Vc is also different, and the second oscillating signal LX remains unchanged, so that the duration that the voltage of the amplified signal Vc is less than the voltage of the first oscillating signal V3 is different, and thus the proportion of the high level signal output by the second selector is different, so that the voltage regulating circuit provided in this embodiment of the present application can regulate the duty ratio of the required driving voltage according to the difference Δ V between the maximum value and the minimum value of different driving voltage signals. In particular implementation, the first reference signal Vref may be a fixed high level signal, for example. When the first reference signal Vref and the first oscillating signal V3 are set, the signals may satisfy the following condition: and when the difference between the maximum value and the minimum value of the driving voltage signal is smaller than the first preset value, the duty ratio is reduced.
Optionally, the first switch is an N-type transistor, and the second switch is a P-type transistor.
The display device provided by the embodiment of the application comprises the voltage regulating circuit provided by the embodiment of the application.
The display device provided by the embodiment of the application can be a liquid crystal display device, so that a driving voltage signal of the liquid crystal display device can be adjusted, and the enhancement or weakening of the driving capability is realized.
The display device provided by the embodiment of the application can be a mobile phone, a computer, a television and the like.
In summary, the voltage adjusting method, the voltage adjusting circuit and the display device provided in the embodiments of the present application can determine the difference between the maximum value and the minimum value of the driving voltage signal, and adjust the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal. Therefore, the display defect caused by too large fluctuation amplitude of the driving voltage signal can be avoided. The power consumption can also be reduced by adjusting the duty cycle of the driving voltage signal in the case that the driving voltage signal fluctuation amplitude meets the display requirement. In addition, the voltage regulating circuit provided by the embodiment of the application can continuously regulate the regulated driving voltage signal so that the driving voltage signal meets the requirement, thereby realizing the self-adaptive regulation of the driving voltage signal.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A method of voltage regulation, the method comprising:
determining a difference between a maximum value and a minimum value of the driving voltage signal of the power source terminal;
adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal;
the adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal specifically includes:
obtaining an amplified signal of a difference between a maximum value and a minimum value of the driving voltage signal and a difference of a reference signal at a reference signal end;
determining whether the voltage of the amplified signal is greater than the voltage of a first oscillating signal at a first oscillating signal end, selecting to output a low-level signal when the voltage of the amplified signal is greater than the voltage of the first oscillating signal, and selecting to output a high-level signal when the voltage of the amplified signal is less than the voltage of the first oscillating signal;
determining a duty ratio according to the proportion of the high-level signal, and generating a duty ratio regulation square wave driving signal corresponding to the duty ratio;
and adjusting the duty ratio of the driving voltage signal according to the duty ratio adjusting square wave driving signal.
2. The method according to claim 1, wherein the determining a difference between a maximum value and a minimum value of the driving voltage signal of the power source terminal comprises:
acquiring the maximum value and the minimum value of a voltage reduction signal of the driving voltage signal;
and determining the difference between the maximum value and the minimum value of the driving voltage signal according to the maximum value and the minimum value of the voltage reduction signal.
3. A voltage regulation circuit, characterized in that the voltage regulation circuit comprises: the driving voltage difference value calculating module and the driving voltage adjusting module are connected with the driving voltage difference value calculating module;
the driving voltage difference value calculating module is used for: determining the difference between the maximum value and the minimum value of a driving voltage signal of a power supply end, and outputting the difference between the maximum value and the minimum value of the driving voltage signal to the driving voltage regulating module;
the voltage regulation module is configured to: receiving the difference between the maximum value and the minimum value of the driving voltage signal, and adjusting the duty ratio of the driving voltage signal according to the difference between the maximum value and the minimum value of the driving voltage signal;
the driving voltage difference value calculating module includes: the voltage identification and sampling module and the difference value calculation module are connected with the voltage identification and sampling module;
the voltage identification and sampling module is used for: acquiring the maximum value and the minimum value of a voltage reduction signal of the driving voltage signal; the maximum value and the minimum value of the input voltage reduction signals are output to the difference value calculation module;
the difference calculation module is configured to: determining the difference between the maximum value and the minimum value of the driving voltage signal according to the maximum value and the minimum value of the input buck signal, and outputting the difference between the maximum value and the minimum value of the driving voltage signal to the driving voltage adjusting module;
the voltage regulation circuit further comprises: a first resistor and a second resistor, a first terminal of the first resistor being coupled to the power supply terminal, a second terminal of the first resistor being coupled to the second resistor, and a second terminal of the second resistor being grounded;
the voltage identification and sampling module comprises: a voltage identification and sampling processor;
the input end of the voltage identification and sampling processor is coupled with the second end of the first resistor and used for receiving the voltage reduction signal;
the first output end of the voltage identification and sampling processor is used for outputting the maximum value of the voltage reduction signal to the difference value calculation module;
and the second output end of the voltage identification and sampling processor is used for outputting the minimum value of the voltage reduction signal to the difference value calculation module.
4. The voltage regulation circuit of claim 3, wherein the difference calculation module comprises: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first selector and a calculating unit;
a first end of the third resistor is used for receiving the maximum value of the voltage reduction signal, and a second end of the third resistor is coupled with the non-inverting end of the first selector;
a first terminal of the fourth resistor is configured to receive a minimum value of the buck signal, and a second terminal of the fourth resistor is coupled to the non-inverting terminal of the first selector;
a first end of the fifth resistor is coupled to a second end of the third resistor, and the second end of the fifth resistor is grounded;
a first terminal of the sixth resistor is coupled to a second terminal of the fourth resistor, and a second terminal of the sixth resistor is coupled to an output terminal of the first selector;
the output end of the first selector is used for outputting a first difference signal to the input end of the computing unit;
the computing unit is to: and determining the difference between the maximum value and the minimum value of the buck signal according to the first difference signal, and determining and outputting the difference between the maximum value and the minimum value of the drive voltage signal according to the difference between the maximum value and the minimum value of the buck signal.
5. The voltage regulating circuit of claim 4, wherein the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor satisfy the following condition:
wherein r3 is the resistance value of the third resistor, and r4 is the resistance value of the fourth resistor; r5 is the resistance of the fifth resistor; r6 is the resistance of the sixth resistor.
6. The voltage regulation circuit of claim 3, wherein the voltage regulation module comprises: the circuit comprises a first amplifier, a second selector, a seventh resistor, a first capacitor, a signal output unit, a first switch and a second switch;
the inverting terminal of the first amplifier is used for receiving the difference between the maximum value and the minimum value of the driving voltage signal, and the non-inverting terminal of the first amplifier is used for receiving a first reference signal of a reference signal terminal; the output end of the first amplifier is coupled with the non-inverting end of the second selector and used for outputting an amplified signal;
a first end of the seventh resistor is coupled to the non-inverting end of the first amplifier, a second end of the seventh resistor is coupled to the first stage of the first capacitor, and the second stage of the first capacitor is grounded;
the inverting terminal of the second selector is configured to receive the first oscillating signal of the first oscillating signal terminal;
an output of the second selector is to: when the voltage of the amplified signal is greater than the voltage of the first oscillating signal, selectively outputting a low-level signal; when the voltage of the amplified signal is less than the voltage of the first oscillating signal, selectively outputting a high-level signal;
the input end of the signal output unit is coupled with the output end of the second selector, and the signal output unit is used for determining the duty ratio of the driving voltage signal according to the proportion of the high-level signal and generating and outputting a duty ratio regulation square wave driving signal corresponding to the duty ratio;
the control end of the first switch is coupled to the output end of the signal output unit, the first end of the first switch is used for inputting a second oscillation signal of a second oscillation signal end, and the second end of the first switch is grounded; the first switch is used for: when the duty ratio adjusting square wave driving signal is a low-level signal, the duty ratio adjusting square wave driving signal is turned on, and the second oscillation signal end is controlled to be conducted with the ground;
a control terminal of the second switch is coupled to the output terminal of the signal output unit, a first terminal of the second switch is used for inputting a second oscillation signal, and a second terminal of the second switch is coupled to the power supply terminal; the second switch is used for: and when the duty ratio regulation square wave driving signal is a high-level signal, the duty ratio regulation square wave driving signal is turned on, and the second oscillation signal end is controlled to be conducted with the power supply end.
7. The voltage regulating circuit of claim 6, wherein the first switch is an N-type transistor and the second switch is a P-type transistor.
8. A display device, characterized in that the display device comprises the voltage regulating circuit according to any one of claims 3 to 7.
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