CN216145413U - Display screen voltage transformation circuit and electronic equipment - Google Patents
Display screen voltage transformation circuit and electronic equipment Download PDFInfo
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- CN216145413U CN216145413U CN202121888123.5U CN202121888123U CN216145413U CN 216145413 U CN216145413 U CN 216145413U CN 202121888123 U CN202121888123 U CN 202121888123U CN 216145413 U CN216145413 U CN 216145413U
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Abstract
The embodiment of the utility model provides a display screen voltage transformation circuit and electronic equipment. The method comprises the following steps: the capacitive touch screen comprises an input electrode, a first output electrode, a second output electrode, a first control switch, a second control switch, a third control switch, a fourth control switch, a first capacitor module and an inductor module; the input electrode is electrically connected with the first control switch, the first control switch is electrically connected with the first output electrode, the first capacitor module and the second control switch respectively, the first capacitor module is grounded, the second control switch and the third control switch are electrically connected with the first end of the inductor module, the second end of the inductor module is electrically connected with the second output electrode, and the third control switch is electrically connected with the fourth control switch; and under the condition that the difference value between the voltage of the input electrode and the voltage of the first output electrode is smaller than a preset differential pressure threshold value, the first control switch is in a conducting state, and the second control switch is in a disconnecting state, so that the voltage input by the input electrode is transmitted to the first output electrode.
Description
Technical Field
The utility model relates to the technical field of electronic equipment, in particular to a display screen voltage transformation circuit and electronic equipment.
Background
With the development of science and technology, electronic devices are more and more widely applied. In order to improve the charging rate of the electronic device, a double-battery cell is installed in the electronic device, and then the display screen of the electronic device is powered through the double-battery cell. Usually, the double-cell is connected with a display screen voltage transformation circuit, and the voltage of the double-cell is converted by the display screen voltage transformation circuit so that the voltage transmitted to the display screen meets the requirement. In the related art, the conversion efficiency of the display screen voltage transformation circuit is low.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a display screen voltage transformation circuit and electronic equipment, and aims to solve the problem that the conversion efficiency of the display screen voltage transformation circuit in the related art is low.
In order to solve the technical problem, the utility model is realized as follows:
in a first aspect, an embodiment of the present invention provides a display screen voltage transformation circuit, including: the capacitive touch screen comprises an input electrode, a first output electrode, a second output electrode, a first control switch, a second control switch, a third control switch, a fourth control switch, a first capacitor module and an inductor module;
the input electrode is electrically connected with the first control switch, the first control switch is electrically connected with the first output electrode, the first capacitor module and the second control switch respectively, the first capacitor module is grounded, the second control switch and the third control switch are electrically connected with the first end of the inductor module, the second end of the inductor module is electrically connected with the second output electrode, and the third control switch is electrically connected with the fourth control switch;
under the condition that the difference value between the voltage of the input electrode and the voltage of the first output electrode is smaller than a preset voltage difference threshold value, the first control switch is in a conducting state, and the second control switch is in a disconnecting state, so that the voltage input by the input electrode is transmitted to the first output electrode;
and under the condition that the difference value between the voltage of the input electrode and the voltage of the second output electrode is greater than a preset voltage difference threshold value, the first control switch, the second control switch, the third control switch and the fourth control switch are in a state of being alternately conducted so as to reduce the power supply voltage of the display screen.
In a second aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes a display screen and the display screen voltage transformation circuit in the first aspect;
the first output electrode and the second output electrode are electrically connected with the display screen.
In the embodiment of the present invention, when the difference between the voltage of the input electrode and the voltage of the first output electrode is smaller than the preset voltage difference threshold, the first control switch is in the on state, and the second control switch is in the off state, so that the voltage input by the input electrode is transmitted to the first output electrode. And under the condition that the difference value between the voltage of the input electrode and the voltage of the second output electrode is greater than a preset voltage difference threshold value, the first control switch, the second control switch, the third control switch and the fourth control switch are in an alternative conduction state, so that the power supply voltage of the display screen is reduced. That is, by determining the voltage magnitude relationship among the input electrode, the first output electrode, and the second output electrode, the display screen transformation circuit can be in different states, so as to change the voltage input by the input electrode, and thus, the voltage output by the first output electrode or the voltage output by the second output electrode can meet the requirement, so that the conversion efficiency of the voltage input by the input electrode is higher, and the conversion efficiency of the display screen transformation circuit is higher.
Drawings
Fig. 1 is a schematic diagram of a display screen voltage transformation circuit according to an embodiment of the present invention.
Reference numerals:
10: an input electrode; 20: a first output electrode; 30: a second output electrode; 40: a first control switch; 50: a second control switch; 60: a third control switch; 70: a fourth control switch; 80: a first capacitive module; 90: an inductance module; 100: a third capacitor; 110: a fifth control switch; 120: a sixth control switch; 130: a seventh control switch; 140: an eighth control switch; 150: and a fourth capacitor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Referring to fig. 1, a schematic diagram of a display screen voltage transformation circuit according to an embodiment of the present invention is shown, and as shown in fig. 1, the display screen voltage transformation circuit includes: an input electrode 10, a first output electrode 20, a second output electrode 30, a first control switch 40, a second control switch 50, a third control switch 60, a fourth control switch 70, a first capacitive module 80, and an inductive module 90.
The input electrode 10 is electrically connected to the first control switch 40, the first control switch 40 is electrically connected to the first output electrode 20, the first capacitor module 80 and the second control switch 50, respectively, the first capacitor module 80 is grounded, the second control switch 50 and the third control switch 60 are electrically connected to the first end of the inductor module 90, the second end of the inductor module 90 is electrically connected to the second output electrode 30, and the third control switch 60 is electrically connected to the fourth control switch 70. In the case that the difference between the voltage of the input electrode 10 and the voltage of the first output electrode 20 is less than the preset voltage difference threshold, the first control switch 40 is in the on state, and the second control switch 50 is in the off state, so that the voltage input from the input electrode 10 is transmitted to the first output electrode 20. In the case that the difference between the voltage of the input electrode 10 and the voltage of the second output electrode 30 is greater than the preset voltage difference threshold, the first control switch 40, the second control switch 50, the third control switch 60 and the fourth control switch 70 are all in the state of being alternately turned on, so that the supply voltage of the display screen is reduced.
In the embodiment of the present invention, in the case that the difference between the voltage of the input electrode 10 and the voltage of the first output electrode 20 is smaller than the preset voltage difference threshold, the first control switch 40 is in the on state, and the second control switch 50 is in the off state, so that the voltage input by the input electrode 10 is transmitted to the first output electrode 20. In the case that the difference between the voltage of the input electrode 10 and the voltage of the second output electrode 30 is greater than the preset voltage difference threshold, the first control switch 40, the second control switch 50, the third control switch 60 and the fourth control switch 70 are all in the state of being alternately turned on, so that the supply voltage of the display screen is reduced. That is, by determining the voltage magnitude relationship among the input electrode 10, the first output electrode 20, and the second output electrode 30, the display screen transformation circuit can be in different states, so as to change the voltage input by the input electrode 10, and thus the voltage output by the first output electrode 20 or the voltage output by the second output electrode 30 can meet the requirement, so that the conversion efficiency of the voltage input by the input electrode 10 is high, and the conversion efficiency of the display screen transformation circuit is high.
It should be noted that, in the embodiment of the present invention, the preset differential pressure threshold may be set according to actual needs, for example, the preset differential pressure threshold may be 0.5V, and for a specific value of the preset differential pressure threshold, the embodiment of the present invention is not limited herein.
In addition, in the embodiment of the utility model, when the display screen voltage transformation circuit is applied to an electronic device, the first output electrode 20 and the second output electrode 30 may be electrically connected to a display screen of the electronic device.
In addition, in the embodiment of the present invention, when the difference between the voltage of the input electrode 10 and the voltage of the second output electrode 30 is greater than the preset voltage difference threshold, the state where the first control switch 40, the second control switch 50, the third control switch 60, and the fourth control switch 70 are all in the alternate conduction state means that: the first control switch 40 and the third control switch 60 are turned off or turned on simultaneously, and the second control switch 50 and the fourth control switch 70 are turned off or turned on simultaneously, wherein when the first control switch 40 and the third control switch 60 are turned off, the second control switch 50 and the fourth control switch 70 are turned on, and when the first control switch 40 and the third control switch 60 are turned on, the second control switch 50 and the fourth control switch 70 are turned off.
In addition, in the embodiment of the present invention, the first capacitor module 80 may include a first capacitor 81 and a second capacitor. The first capacitor 81 is electrically connected to the first control switch 40, the second control switch 50, and the second capacitor, respectively, and the second capacitor is grounded.
When the first capacitor module 80 includes the first capacitor 81 and the second capacitor, the first capacitor 81 is electrically connected to the second capacitor, and at this time, in the process of charging the first capacitor 81, that is, when the first control switch 40 is turned on, the voltage of the input electrode 10 may be transmitted to the first capacitor 81, and the second capacitor may perform a voltage division function on the first capacitor 81, so that the voltage of the first capacitor 81 is smaller than the voltage of the input electrode 10, and thus the difference between the voltage of the first capacitor 81 and the voltage of the second output electrode 30 is smaller. Generally, the smaller the voltage difference, the higher the voltage conversion efficiency. Therefore, by arranging the first capacitor 81 and the second capacitor, the second capacitor performs a voltage division function on the first capacitor 81, so that the conversion efficiency of the display screen transformation circuit can be improved.
It should be noted that, in the embodiment of the present invention, a second capacitor is connected in series with the first capacitor 81, and the second capacitor may perform a voltage division function on the first capacitor 81, where when the second capacitor divides the first capacitor 81, a voltage on the second capacitor may be equal to a voltage on the first capacitor 81. I.e. the voltage over the first capacitor 81 may be half the voltage of the input electrode 10 and the voltage over the second capacitor may be half the voltage of the input electrode 10.
In addition, in the embodiment of the present invention, the display screen transforming circuit may further include a third capacitor 100, one end of the third capacitor 100 is electrically connected to the second end of the inductance module 90, and the second end of the third capacitor 100 is grounded.
When the display screen transforming circuit includes the third capacitor 100, at this time, when the difference between the voltage of the input electrode 10 and the voltage of the second output electrode 30 is greater than the preset difference threshold, the third capacitor 100 may serve as a voltage stabilizing capacitor of the display screen transforming circuit, that is, the third capacitor 100 may play a role of filtering, so that the voltage of the second output electrode 30 may be relatively stable.
In addition, in the embodiment of the present invention, the display screen transforming circuit may further include: a fifth control switch 110, a sixth control switch 120, a seventh control switch 130, an eighth control switch 140, and a fourth capacitor 150. A first end of the fifth control switch 110 is electrically connected to the second output electrode 30, a second end of the fifth control switch 110 is electrically connected to a first end of the sixth control switch 120, a second end of the sixth control switch 120 is electrically connected to a first end of the seventh control switch 130, a second end of the seventh control switch 130 is electrically connected to a first end of the eighth control switch 140, and a second end of the eighth control switch 140 is grounded. A first end of the fourth capacitor 150 is electrically connected to the second end of the fourth control switch 70, a second end of the fourth capacitor 150 is electrically connected to the second end of the seventh control switch 130, and a second end of the inductor module 90 is electrically connected to the second end of the fifth control switch 110 and the first end of the sixth control switch 120, respectively.
In the embodiment of the present invention, when the difference between the voltage of the input electrode 10 and the voltage of the first output electrode 20 is smaller than the preset voltage difference threshold, the first control switch 40 is in the on state, and the second control switch 50 is in the off state, so that the voltage input by the input electrode 10 is transmitted to the first output electrode 20; when the difference between the voltage of the input electrode 10 and the voltage of the second output electrode 30 is greater than the preset voltage difference threshold, the first control switch 40, the second control switch 50, the third control switch 60 and the fourth control switch 70 are all in an alternately conducting state, the seventh control switch 130 is in an off state, and the fifth control switch 110, the sixth control switch 120 and the eighth control switch 140 are all in a conducting state, so that the display screen transformation circuit is in a voltage reduction state; when the voltage of the input electrode 10 is less than the voltage of the second output electrode 30, the first control switch 40, the second control switch 50, the third control switch 60, the fourth control switch 70, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130 and the eighth control switch 140 are all in an alternating conduction state, so that the display screen transformation circuit is in a boosting state.
When the voltage of the input electrode 10 is less than the voltage of the second output electrode 30, the first control switch 40, the second control switch 50, the third control switch 60, the fourth control switch 70, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130 and the eighth control switch 140 are in the alternate conducting state, which means that: the first control switch 40 and the third control switch 60 are turned off or turned on simultaneously, and the second control switch 50 and the fourth control switch 70 are turned off or turned on simultaneously, wherein when the first control switch 40 and the third control switch 60 are turned off, the second control switch 50 and the fourth control switch 70 are turned on, and when the first control switch 40 and the third control switch 60 are turned on, the second control switch 50 and the fourth control switch 70 are turned off. The fifth control switch 110 and the seventh control switch 130 are turned off or turned on simultaneously, and the sixth control switch 120 and the eighth control switch 140 are turned off or turned on simultaneously, wherein when the fifth control switch 110 and the seventh control switch 130 are turned off, the sixth control switch 120 and the eighth control switch 140 are turned on, and when the fifth control switch 110 and the seventh control switch 130 are turned on, the sixth control switch 120 and the eighth control switch 140 are turned off.
In addition, in the embodiment of the present invention, when the voltage of the input electrode 10 is smaller than the voltage of the second output electrode 30, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130 and the eighth control switch 140 are turned on alternately, and at this time, the third capacitor 100 and the fourth capacitor 150 can both store energy and release energy, so as to output the voltage to the second output electrode 30.
In addition, in the embodiment of the utility model, the display screen transformation circuit may further include a controller. The first control switch 40, the second control switch 50, the third control switch 60 and the fourth control switch 70 are all electrically connected with the controller.
When the display screen transformation circuit includes a controller, and the first control switch 40, the second control switch 50, the third control switch 60, and the fourth control switch 70 are all electrically connected to the controller, at this time, the controller may control the first control switch 40, the second control switch 50, the third control switch 60, and the fourth control switch 70, so that the first control switch 40, the second control switch 50, the third control switch 60, and the fourth control switch 70 may be turned on or off.
In addition, in the embodiment of the present invention, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130, and the eighth control switch 140 may be electrically connected to the controller.
When the display screen transformation circuit includes a controller, and the fifth control switch 110, the sixth control switch 120, the seventh control switch 130, and the eighth control switch 140 are all electrically connected to the controller, at this time, the controller may control the fifth control switch 110, the sixth control switch 120, the seventh control switch 130, and the eighth control switch 140, so that the fifth control switch 110, the sixth control switch 120, the seventh control switch 130, and the eighth control switch 140 may be turned on or off.
In addition, in the embodiment of the present application, the controller may be electrically connected to the input electrode 10, the first output electrode 20, and the second output electrode 30, and the controller may acquire voltages on the input electrode 10, the first output electrode 20, and the second output electrode 30.
In addition, in the embodiment of the present invention, each of the first control switch 40, the second control switch 50, the third control switch 60, and the fourth control switch 70 may include any one of a triode and a metal-oxide-semiconductor field effect transistor.
In addition, in the embodiment of the present invention, each of the fifth control switch 110, the sixth control switch 120, the seventh control switch 130, and the eighth control switch 140 may include any one of a triode and a metal-oxide-semiconductor field effect transistor.
In addition, in the embodiment of the present invention, in the case that the first control switch 40 is a metal-oxide-semiconductor field effect transistor, the first control switch 40 includes a source, a gate and a drain, the drain is electrically connected to the input electrode 10, the source is electrically connected to the first output electrode 20, the first capacitor module 80 and the second control switch 50, respectively, and the gate is used for receiving a control signal to turn on or off the first control switch 40.
Of course, the second control switch 50, the third control switch 60, the fourth control switch 70, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130, and the eighth control switch 140 may also be mosfets, and in this case, the second control switch 50, the third control switch 60, the fourth control switch 70, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130, and the eighth control switch 140 may include a source, a gate, and a drain. The grid electrode is connected with the controller to receive the control signal.
The following describes the working principle of the display screen transformer circuit provided by the embodiment of the present invention with reference to fig. 1:
when the difference between the voltage of the input electrode 10 and the voltage of the first output electrode 20 is smaller than the preset voltage difference threshold, the first control switch 40 is in the on state, and the first control switch 40 or the second control switch 50 is in the off state, because the capacitor has the characteristic of alternating current and direct current, at this time, the voltage of the input electrode 10 can be transmitted to the first output electrode 20 through the first control switch 40.
When the difference between the voltage of the input electrode 10 and the voltage of the second output electrode 30 is greater than the preset voltage difference threshold, the first control switch 40, the second control switch 50, the third control switch 60, and the fourth control switch 70 are all in an alternately turned-on state, the seventh control switch 130 is in an off state, the fifth control switch 110, the sixth control switch 120, and the eighth control switch 140 are all in an on state, at this time, when the first control switch 40 and the third control switch 60 are turned on, and the second control switch 50 and the fourth control switch 70 are turned off, the voltage of the input electrode 10 is transmitted to the first capacitor 81 to charge the first capacitor 81, and the first capacitor 81 is connected in series, and the second capacitor performs a voltage dividing function on the first capacitor 81 to prevent the voltage on the first capacitor 81 from being too large. When the first control switch 40 and the third control switch 60 are disconnected, and the second control switch 50 and the fourth control switch 70 are connected, the first capacitor 81 releases electric energy, the released electric energy flows to the inductance module 900 through the second control switch 50, the electric energy released by the first capacitor 81 is transmitted to the sixth control switch 120 through the inductance module 900, then is transmitted to the fifth control switch 110 from the sixth control switch 120, and finally is transmitted to the second output electrode 30, and in the whole process, the characteristic of the inductance is combined, so that the display screen transformation circuit is in a voltage reduction state. The third capacitor 100 plays a role of stabilizing voltage in the circuit.
When the voltage of the input electrode 10 is less than the voltage of the second output electrode 30, the first control switch 40, the second control switch 50, the third control switch 60, the fourth control switch 70, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130 and the eighth control switch 140 are all in an alternating on state, at this time, when the first control switch 40 and the third control switch 60 are on, the second control switch 50 and the fourth control switch 70 are off, when the first control switch 40 and the third control switch 60 are off, the second control switch 50 and the fourth control switch 70 are on, and when the fifth control switch 110 and the seventh control switch 130 are on, the sixth control switch 120 and the eighth control switch 140 are off. When the first control switch 40, the second control switch 50, the third control switch 60, the fourth control switch 70, the fifth control switch 110, the sixth control switch 120, the seventh control switch 130 and the eighth control switch 140 are alternately turned on, the first capacitor 81, the third capacitor 100 and the fourth capacitor 150 store energy or release energy, and in the whole process, the characteristic of the inductor is combined, so that the display screen transformation circuit is in a boosting state.
It should be noted that, when the first control switch 40 and the third control switch 60 are turned on, the fifth control switch 110 and the seventh control switch 130 may be turned on or off, that is, whether the first control switch 40 and the third control switch 60 are turned on or off does not affect the turning on or off of the fifth control switch 110 and the seventh control switch 130.
In the embodiment of the present invention, in the case that the difference between the voltage of the input electrode 10 and the voltage of the first output electrode 20 is smaller than the preset voltage difference threshold, the first control switch 40 is in the on state, and the second control switch 50 is in the off state, so that the voltage input by the input electrode 10 is transmitted to the first output electrode 20. In the case that the difference between the voltage of the input electrode 10 and the voltage of the second output electrode 30 is greater than the preset voltage difference threshold, the first control switch 40, the second control switch 50, the third control switch 60 and the fourth control switch 70 are all in the state of being alternately turned on, so that the supply voltage of the display screen is reduced. That is, by determining the voltage magnitude relationship among the input electrode 10, the first output electrode 20, and the second output electrode 30, the display screen transformation circuit can be in different states, so as to change the voltage input by the input electrode 10, and thus the voltage output by the first output electrode 20 or the voltage output by the second output electrode 30 can meet the requirement, so that the conversion efficiency of the voltage input by the input electrode 10 is high, and the conversion efficiency of the display screen transformation circuit is high.
The embodiment of the utility model provides electronic equipment, which comprises a display screen and a display screen voltage transformation circuit in any embodiment of the electronic equipment. The first output electrode 20 and the second output electrode 30 are electrically connected to the display panel.
Since the first output electrode 20 and the second output electrode 30 are both electrically connected to the display panel, the first output electrode 20 can supply a voltage to the display panel, and the second output electrode 30 can supply a voltage to the display panel.
It should be noted that, because the voltage required by the display screen is a relatively determined value, that is, when the luminance of the display screen is different, the voltage required by the display screen is different, but only when the luminance of the display screen is fixed, the voltage required by the display slice is fixed. Therefore, the voltage on the first output electrode 20 and the voltage on the second output electrode 30 are determined, so that when the display screen transformation circuit comprises a controller, the controller can obtain the voltages on the input electrode 10, the first output electrode 20 and the second output electrode 30.
In addition, in the embodiment of the present invention, the electronic device may further include a battery and a charging interface. The battery or the charging interface is electrically connected to the input electrode 10.
When the electronic device includes a battery and a charging interface, the battery may be electrically connected to the input electrode 10, that is, a voltage may be supplied to the input electrode 10 through the battery. It is also possible to electrically connect the charging interface to the input electrode 10 and supply a voltage to the input electrode 10 via a power supply connected to the charging interface.
In addition, in the embodiment of the present invention, when the display screen voltage transformation circuit includes a controller, the controller may be connected to the battery, the controller may obtain the charging information of the battery, and when the controller obtains that the charging information of the battery is fully charged, the controller may control the first control switch 40 to be turned on and the second control switch 50 to be turned off, and at this time, the voltage of the input electrode 10 is directly transmitted to the first output electrode 20. When the input electrode 10 is connected to the battery, the battery supplies a stable voltage to the input electrode 10 because the battery is fully charged, so that the display panel can obtain a stable voltage.
It should be noted that, in the embodiment of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
While alternative embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the true scope of the embodiments of the utility model.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or terminal 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 article or terminal apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or terminal device comprising the element.
While the technical solutions provided by the present invention have been described in detail, the principles and embodiments of the present invention are described herein by using specific examples, and meanwhile, for a person of ordinary skill in the art, according to the principles and implementation manners of the present invention, changes may be made in the specific embodiments and application ranges.
Claims (10)
1. A display screen voltage transformation circuit, comprising: the capacitive touch screen comprises an input electrode, a first output electrode, a second output electrode, a first control switch, a second control switch, a third control switch, a fourth control switch, a first capacitor module and an inductor module;
the input electrode is electrically connected with the first control switch, the first control switch is electrically connected with the first output electrode, the first capacitor module and the second control switch respectively, the first capacitor module is grounded, the second control switch and the third control switch are electrically connected with the first end of the inductor module, the second end of the inductor module is electrically connected with the second output electrode, and the third control switch is electrically connected with the fourth control switch;
under the condition that the difference value between the voltage of the input electrode and the voltage of the first output electrode is smaller than a preset voltage difference threshold value, the first control switch is in a conducting state, and the second control switch is in a disconnecting state, so that the voltage input by the input electrode is transmitted to the first output electrode;
and under the condition that the difference value between the voltage of the input electrode and the voltage of the second output electrode is greater than a preset voltage difference threshold value, the first control switch, the second control switch, the third control switch and the fourth control switch are in a state of being alternately conducted so as to reduce the power supply voltage of the display screen.
2. The display screen transformation circuit of claim 1, wherein the first capacitance module comprises a first capacitance and a second capacitance;
the first capacitor is electrically connected with the first control switch, the second control switch and the second capacitor respectively, and the second capacitor is grounded.
3. The display screen transformation circuit of claim 1, wherein the display screen transformation circuit further comprises a third capacitor;
one end of the third capacitor is electrically connected with the second end of the inductance module, and the second end of the third capacitor is grounded.
4. The display screen transformation circuit of claim 3, further comprising: a fifth control switch, a sixth control switch, a seventh control switch, an eighth control switch and a fourth capacitor;
a first end of the fifth control switch is electrically connected with the second output electrode, a second end of the fifth control switch is electrically connected with a first end of the sixth control switch, a second end of the sixth control switch is electrically connected with a first end of the seventh control switch, a second end of the seventh control switch is electrically connected with a first end of the eighth control switch, and a second end of the eighth control switch is grounded;
the first end of the fourth capacitor is electrically connected with the second end of the fourth control switch, the second end of the fourth capacitor is electrically connected with the second end of the seventh control switch, and the second end of the inductance module is electrically connected with the second end of the fifth control switch and the first end of the sixth control switch respectively.
5. The display screen transformation circuit of claim 4, further comprising: a controller;
the first control switch, the second control switch, the third control switch and the fourth control switch are all electrically connected with the controller.
6. The display screen transformation circuit of claim 5, wherein the fourth control switch, the fifth control switch, the sixth control switch, and the seventh control switch are electrically connected to the controller.
7. The display screen voltage transformation circuit according to any one of claims 1 to 4, wherein the first control switch, the second control switch, the third control switch and the fourth control switch each comprise any one of a triode and a metal-oxide-semiconductor field effect transistor.
8. The display screen voltage transformation circuit according to claim 7, wherein in a case that the first control switch is the metal-oxide-semiconductor field effect transistor, the first control switch includes a source electrode, a gate electrode, and a drain electrode, the drain electrode is electrically connected to the input electrode, the source electrode is electrically connected to the first output electrode, the first capacitor module, and the second control switch, respectively, and the gate electrode is configured to receive a control signal to turn on or off the first control switch.
9. An electronic device, wherein the electronic device comprises a display screen and the display screen transformation circuit of any one of claims 1-8;
the first output electrode and the second output electrode are electrically connected with the display screen.
10. The electronic device of claim 9, further comprising a battery and a charging interface;
the battery or the charging interface is electrically connected with the input electrode.
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| CN202121888123.5U CN216145413U (en) | 2021-08-12 | 2021-08-12 | Display screen voltage transformation circuit and electronic equipment |
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| CN202121888123.5U CN216145413U (en) | 2021-08-12 | 2021-08-12 | Display screen voltage transformation circuit and electronic equipment |
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