Voltage conversion device, chip and electronic device

Abstract

The present disclosure relates to a voltage conversion device, a chip and an electronic device, wherein the device comprises: a first module, for selecting at least one positive voltage signal from a plurality of input first voltage signals as a first intermediate voltage signal output, and selecting at least one negative voltage signal from a plurality of input second voltage signals as a second intermediate signal output; a second module, electrically connected to the first module, for receiving an input signal, the first intermediate voltage signal and the second intermediate signal, and using the first intermediate voltage signal and the second intermediate voltage signal as the positive amplitude and negative amplitude of the input signal, respectively, to output a buffer signal; a third module, electrically connected to the second module, for outputting a conversion voltage signal according to the buffer signal. The present disclosure can reduce the switching loss of the third module in the process of voltage conversion, thereby saving costs and improving the voltage conversion efficiency of the third module.

Description

Technical Field

[0001] The present disclosure relates to the technical field of integrated circuits, and in particular to a voltage conversion device, a chip, and an electronic device. Background Art

[0002] Charge pumps are widely used in power supplies, memory and RF chips. Different chip applications have different requirements for charge pumps. Some require large current output capabilities, while others require precise output voltages. Related technologies usually increase the operating frequency inside the charge pump so that the charge pump outputs the required current and voltage. However, while increasing the operating frequency inside the charge pump, the internal switching loss will increase, which will greatly reduce the conversion efficiency of the charge pump. Summary of the invention

[0003] In view of this, the present disclosure proposes a voltage conversion device, a chip and an electronic device to reduce switching losses and thus improve voltage conversion efficiency.

[0004] According to one aspect of the present disclosure, a voltage conversion device is provided, the device comprising:

[0005] A first module, configured to select at least one positive voltage signal from a plurality of input first voltage signals as a first intermediate voltage signal output, and to select at least one negative voltage signal from a plurality of input second voltage signals as a second intermediate signal output;

[0006] A second module, electrically connected to the first module, for receiving an input signal, the first intermediate voltage signal and the second intermediate signal, and using the first intermediate voltage signal and the second intermediate voltage signal as the positive amplitude and the negative amplitude of the input signal, respectively, and outputting a buffer signal;

[0007] The third module is electrically connected to the second module and is used for outputting a conversion voltage signal according to the buffer signal.

[0008] In a possible implementation manner, the first module is further configured to receive the input signal, and the selecting at least one positive voltage signal from the input multiple first voltage signals as the first intermediate voltage signal output, and selecting at least one negative voltage signal from the input multiple second voltage signals as the second intermediate signal output, comprises:

[0009] When the input signal is at a rising edge and the input signal is less than a threshold voltage, the second output terminal of the first module sequentially outputs the second intermediate voltage signal in order from low to high, and the first output terminal of the first module outputs the threshold voltage;

[0010] When the input signal is at a rising edge and is greater than the threshold voltage, the first output end of the first module outputs the first intermediate voltage signal in sequence from low to high, and the second output end of the first module outputs the threshold voltage.

[0011] In a possible implementation manner, the step of selecting at least one positive voltage signal from a plurality of input first voltage signals as a first intermediate voltage signal to output, and selecting at least one negative voltage signal from a plurality of input second voltage signals as a second intermediate signal to output, further includes:

[0012] When the input signal is at a falling edge and the input signal is greater than the threshold voltage, the first output terminal of the first module outputs the first intermediate voltage signal in sequence from high to low, and the second output terminal of the first module outputs the threshold voltage;

[0013] When the input signal is at a falling edge and is less than the threshold voltage, the second output end of the first module outputs the second intermediate voltage signal in sequence from high to bottom, and the first output end of the first module outputs the threshold voltage.

[0014] In a possible implementation manner, the first module is further configured to receive a control signal, the control signal corresponding to the first intermediate voltage signal and the second intermediate voltage signal one-to-one, wherein the selecting at least one positive voltage signal from the input multiple first voltage signals as the first intermediate voltage signal output, and selecting at least one negative voltage signal from the input multiple second voltage signals as the second intermediate signal output, comprises:

[0015] The first module is further configured to output a first intermediate voltage signal or a second intermediate voltage signal corresponding to the control signal when the control signal is received.

[0016] In a possible implementation, the first module includes a first multiplexer and a second multiplexer.

[0017] The second module includes a plurality of cascaded inverters, wherein the positive power supply terminals of the plurality of inverters are electrically connected to the output terminal of the first multiplexer for inputting the first intermediate voltage signal, and the negative power supply terminals of the plurality of inverters are electrically connected to the output terminal of the second multiplexer for inputting the second intermediate voltage signal.

[0018] In a possible implementation, the third module includes a plurality of transistors, and each transistor is electrically connected to the corresponding second module and the first module in sequence.

[0019] In a possible implementation, the third module includes a first transistor, a second transistor, a third transistor, a fourth transistor and a capacitor, wherein:

[0020] The source of the first transistor is electrically connected to the drain of the third transistor and the first end of the capacitor, and the drain of the second transistor is connected to the source of the fourth transistor and the second end of the capacitor;

[0021] The gates of the first transistor, the second transistor, the third transistor, and the fourth transistor are used to input the buffer signal, and the buffer signal is used to drive the first transistor, the second transistor, the third transistor, and the fourth transistor.

[0022] The source of the third transistor or the drain of the fourth transistor is used to output a conversion voltage signal.

[0023] According to another aspect of the present disclosure, a chip is provided, wherein the chip includes the voltage conversion device.

[0024] According to another aspect of the present disclosure, a display panel is provided, the display panel comprising:

[0025] Display components;

[0026] The chip.

[0027] In a possible implementation, the display component includes at least one of a liquid crystal display component, a light emitting diode display component, and an organic light emitting diode display component.

[0028] According to another aspect of the present disclosure, an electronic device is provided. The electronic device includes the display panel.

[0029] Through the voltage conversion device, the first module of the present invention can select at least one positive voltage signal from multiple input first voltage signals as a first intermediate voltage signal output, and select at least one negative voltage signal from multiple input second voltage signals as a second intermediate signal output, and control the amplitude of the buffer signal output by the second module through the first intermediate voltage and the second intermediate voltage, thereby reducing the switching loss of the third module during the voltage conversion process, thereby saving costs and improving the voltage conversion efficiency of the third module.

[0030] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0032] Figure 1 A block diagram of a voltage conversion device according to an embodiment of the present disclosure is shown.

[0033] Figure 2 A schematic diagram of a voltage conversion device according to an embodiment of the present disclosure is shown.

[0034] Figure 3 A schematic diagram of a buffered signal output by a second module according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0035] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0036] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0037] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0038] See also Figure 1 , Figure 1 A block diagram of a voltage conversion device according to an embodiment of the present disclosure is shown.

[0039] like Figure 1 As shown, the device comprises:

[0040] The first module 10 is used to select at least one positive voltage signal from a plurality of input first voltage signals as a first intermediate voltage signal output, and select at least one negative voltage signal from a plurality of input second voltage signals as a second intermediate signal output;

[0041] The second module 20 is electrically connected to the first module 10, and is used to receive an input signal, the first intermediate voltage signal, and the second intermediate signal, and use the first intermediate voltage signal and the second intermediate voltage signal as the positive amplitude and negative amplitude of the input signal, respectively, and output a buffer signal;

[0042] The third module 30 is electrically connected to the second module 20 and is used for outputting a conversion voltage signal according to the buffer signal.

[0043] Through the voltage conversion device, the first module of the present disclosure can select at least one positive voltage signal from the input multiple first voltage signals as the first intermediate voltage signal for output, and select at least one negative voltage signal from the input multiple second voltage signals as the second intermediate signal for output. The amplitude of the buffer signal output by the second module is controlled by the first intermediate voltage and the second intermediate voltage, thereby reducing the switching loss during the voltage conversion of the third module, saving costs, and improving the voltage conversion efficiency of the third module.

[0044] In a possible implementation manner, the input signal can be a square wave, a triangular wave, a rectangular wave, a sine wave, etc. The following will take a square wave as an example to illustrate the various implementation manners of the present disclosure.

[0045] In a possible implementation manner, the first module can also be used to receive the input signal. The process of selecting at least one positive voltage signal from the input multiple first voltage signals as the first intermediate voltage signal for output and selecting at least one negative voltage signal from the input multiple second voltage signals as the second intermediate signal for output may include:

[0046] When the input signal is at the rising edge and the input signal is less than the threshold voltage, the second output terminal of the first module outputs the second intermediate voltage signal in ascending order, and at the same time, the first output terminal of the first module outputs the threshold voltage;

[0047] When the input signal is at the rising edge and the input signal is greater than the threshold voltage, the first output terminal of the first module outputs the first intermediate voltage signal in ascending order, and at the same time, the second output terminal of the first module outputs the threshold voltage.

[0048] In a possible implementation manner, the threshold voltage can be the ground voltage. For example, the threshold voltage can be 0V.

[0049] For example, when the input positive first voltage signals VSP include VSP1, VSP2, VSP3, and the negative second voltage signals VSN include VSN1, VSN2, VSN3, where VSP1 < VSP2 < VSP3 (for example, 5V, 10V, 15V respectively), and VSN1 < VSN2 < VSN3 (for example, -15V, -10V, -5V respectively), then

[0050] According to "when the input signal is on the rising edge and the input signal is less than the threshold voltage, the second output end of the first module sequentially outputs the second intermediate voltage signal in order from low to high, and the first output end of the first module outputs the threshold voltage", when the input signal is on the rising edge and is less than 0V, the second output end of the first module sequentially outputs voltage signal VSN1, voltage signal VSN2, and voltage signal VSN3, and the first output end of the first module outputs a voltage signal of 0V during this period.

[0051] According to "when the input signal is at a rising edge and the input signal is greater than the threshold voltage, the first output end of the first module sequentially outputs the first intermediate voltage signal in order from low to high, and the second output end of the first module outputs the threshold voltage", when the input signal is at a rising edge and is greater than 0V, the first output end of the first module sequentially outputs voltage signal VSP1, voltage signal VSP2, and voltage signal VSP3. During this period, the second output end of the first module outputs a voltage signal of 0V.

[0052] In a possible implementation manner, the step of selecting at least one positive voltage signal from a plurality of input first voltage signals as a first intermediate voltage signal to output, and selecting at least one negative voltage signal from a plurality of input second voltage signals as a second intermediate signal to output, may further include:

[0053] When the input signal is at a falling edge and the input signal is greater than the threshold voltage, the first output terminal of the first module outputs the first intermediate voltage signal in sequence from high to low, and the second output terminal of the first module outputs the threshold voltage;

[0054] When the input signal is at a falling edge and is less than the threshold voltage, the second output end of the first module outputs the second intermediate voltage signal in sequence from high to bottom, and the first output end of the first module outputs the threshold voltage.

[0055] Continuing with the above example, according to "when the input signal is at a falling edge and the input signal is greater than the threshold voltage, the first output end of the first module sequentially outputs the first intermediate voltage signal in order from high to low, and the second output end of the first module outputs the threshold voltage", the first output end of the first module sequentially outputs voltage signal VSP3, voltage signal VSP2, and voltage signal VSP1, and the second output end of the first module outputs a 0V voltage signal.

[0056] According to “when the input signal is at a falling edge and the input signal is less than the threshold voltage, the second output end of the first module sequentially outputs the second intermediate voltage signal in order from high to bottom, and the first output end of the first module outputs the threshold voltage”, the second output end of the first module sequentially outputs voltage signal VSN3, voltage signal VSN2, and voltage signal VSN1, and the first output end of the first module outputs a 0V voltage signal.

[0057] The above positive voltage signal VSP and negative voltage signal VSN both include three voltage signals as an example. It should be understood that the number of positive voltage signals VSP and negative voltage signals VSN can be arbitrary, and those skilled in the art can set them as needed, and the present disclosure does not impose any limitation on this.

[0058] In addition to being able to output in sequence according to the voltage magnitude of the input voltage signal, the first module can also select a corresponding voltage signal to output under the control of a control signal.

[0059] In a possible implementation manner, the first module is further configured to receive a control signal, the control signal corresponding to the first intermediate voltage signal and the second intermediate voltage signal one-to-one, wherein the selecting at least one positive voltage signal as the first intermediate voltage signal output and selecting at least one negative voltage signal as the second intermediate signal output may include:

[0060] The first module is further configured to output a first intermediate voltage signal or a second intermediate voltage signal corresponding to the control signal when the control signal is received.

[0061] For example, when the input voltage signal VSP includes voltage signals VSP1 and VSP2, a control signal can be set to control the first module to select the corresponding voltage signal VSP1 and voltage signal VSP2. For example, the control signal can be a digital signal including multiple bits, which can be selected by the size of the control signal.

[0062] By controlling the first module to output a corresponding voltage signal through a control signal, the first module can be controlled more accurately to output a corresponding voltage signal.

[0063] In a possible implementation, the input voltage signal may include a maximum conversion voltage signal VGH and a minimum conversion voltage signal VGL that can be converted and output by the third module, that is, the first intermediate voltage signal may include the maximum conversion voltage signal VGH, and the second intermediate voltage signal may include the minimum conversion voltage signal VGL. The maximum conversion voltage signal VGH is the maximum voltage signal among the input voltage signals of the first module, and the minimum voltage conversion signal VGL is the minimum voltage signal among the input voltage signals of the first module.

[0064] At the rising edge, the first module may raise the input signal from the minimum conversion voltage signal VGL to the maximum conversion voltage signal VGH by selecting the voltage signals in sequence.

[0065] At the falling edge, the first module may reduce the input signal from the maximum conversion voltage signal VGH to the minimum conversion voltage signal VGL by selecting the voltage signals in sequence.

[0066] By inserting other first intermediate voltage signals and second intermediate voltage signals between the maximum conversion voltage VGH and the minimum conversion voltage signal VGL, the subsequent charge pump can reduce switching losses and improve voltage conversion efficiency when operating at a high frequency.

[0067] See also Figure 2 , Figure 2 A schematic diagram of a voltage conversion device according to an embodiment of the present disclosure is shown.

[0068] In a possible implementation, Figure 2 As shown, the first module may include a multiplexer MUX, and the multiplexer MUX is used to select a required voltage signal from multiple input voltage signals (VSP, VSN, etc.) for output.

[0069] In other implementations, the first module may also be implemented in other ways, as long as it can output a selected voltage signal from multiple input voltage signals as needed.

[0070] In one possible implementation, a plurality of first modules and a plurality of second modules (for example, 4) may be provided, each first module including a first multiplexer and a second multiplexer, each second module including a plurality of cascaded inverters (for example, 2), the positive power supply terminals of the plurality of inverters being electrically connected to the output terminal of the first multiplexer (the first output terminal of the first module) for inputting the first intermediate voltage signal, and the negative power supply terminals of the plurality of inverters being electrically connected to the output terminal of the second multiplexer (the second output terminal of the first module) for inputting the second intermediate voltage signal.

[0071] In a possible implementation, the first multiplexer may include multiple input terminals for inputting multiple first voltage signals, where the multiple first voltage signals may be positive voltage signals (e.g., VSP, VGH). The second multiplexer may include multiple input terminals for inputting multiple second voltage signals, where the multiple second voltage signals may be negative voltage signals (e.g., VSN, VGL).

[0072] In one example, if Figure 2As shown, each second module may include two inverters, namely inverter F1 and inverter F2. The input end of the second module is used to receive an input signal, such as a square wave signal.

[0073] When the first intermediate voltage signal input to the positive power supply terminal of the second module is the voltage signal VSP, the positive amplitude of the buffer signal output by the second module is the voltage signal VSP. When the first intermediate voltage signal input to the positive power supply terminal of the second module is the maximum conversion voltage signal VGH, the positive amplitude of the buffer signal output by the second module is the maximum conversion voltage signal VGH.

[0074] When the second intermediate voltage signal input to the negative power supply terminal of the second module is the voltage signal VSN, the negative amplitude of the buffer signal output by the second module is the voltage signal VSN. When the second intermediate voltage signal input to the negative power supply terminal of the second module is the minimum conversion voltage signal VGL, the negative amplitude of the buffer signal output by the second module is the maximum conversion voltage signal VGL.

[0075] Please also read Figure 3 , Figure 3 A schematic diagram of a buffered signal output by a second module according to an embodiment of the present disclosure is shown.

[0076] like Figure 3 As shown, the change process of the buffer signal output by the second module from the minimum conversion voltage signal VGL to the maximum conversion voltage signal VGH is: VGL-VSN-VSP-VGH.

[0077] The change process of the second module output buffer signal from the maximum conversion voltage signal VGH to the minimum conversion voltage signal VGL is: VGH-VSP-VSN-VGL.

[0078] Of course, the above description is exemplary, and the voltage signal VSP may include multiple voltage signals, and the voltage signal VSN may also include multiple voltage signals, which will not be elaborated in the present disclosure.

[0079] like Figure 3 As shown, when there are no other first intermediate voltage signals VSP and second intermediate voltage signals VSN, the buffer signal changes directly from VGL-VGH, or directly from VGH-VGL. When such a buffer signal is input to the third module, the switching loss caused by the high-frequency operation of the charge wave module will increase, thereby reducing the voltage conversion efficiency.

[0080] In the presence of other first intermediate voltage signals VSP and second intermediate voltage signals VSN, the switching loss of the third module will be greatly reduced, thereby improving the voltage conversion efficiency.

[0081] In a possible implementation, the third module may include a charge pump.

[0082] The third module may include a plurality of transistors, each transistor being electrically connected to the corresponding second module and the first module in sequence.

[0083] It should be understood that in order to achieve voltage conversion to obtain a converted voltage signal, each transistor in the third module can be turned on or off according to a pre-configured timing, and the third module can have a variety of different implementation methods. Under different implementation methods, the number of transistors, control logic, and timing in the third module are all different. Therefore, the input signals of the corresponding second module and first module to which each transistor of the third module is electrically connected in sequence are not necessarily the same.

[0084] The third module is explained below by taking a four-switch charge pump as an example.

[0085] In one possible implementation, see Figure 2 , the third module may include a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4 and a capacitor C, wherein,

[0086] The source of the first transistor Q1 is electrically connected to the drain of the third transistor Q3 and the first end of the capacitor C, and the drain of the second transistor Q2 is connected to the source of the fourth transistor Q4 and the second end of the capacitor;

[0087] The gates of the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 are used to input the buffer signal, and the buffer signal is used to drive the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4. Figure 2 As shown, the gates of the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 are connected to the corresponding second module and the first module respectively.

[0088] The source of the third transistor Q3 or the drain of the fourth transistor Q4 is used to output a conversion voltage signal.

[0089] In a possible implementation, the source of the third transistor Q3 may be used to output the maximum conversion voltage signal VGH, and the drain of the fourth transistor Q4 may be used to output the minimum conversion voltage signal VGL.

[0090] The above description uses the example that the third module outputs the maximum conversion voltage signal VGH and the minimum conversion voltage signal VGL. However, it should be understood that the present disclosure is not limited to this. The third module can output conversion voltage signals of other values, and the output conversion voltage signal can be between the minimum conversion voltage signal VGL and the maximum conversion voltage signal VGH.

[0091] The present disclosure outputs the first intermediate voltage signal and the second intermediate voltage signal through the first module and the second module, so that the third module can reduce the switching loss in the fast switching state, reduce the load of the third module, and thus improve the voltage conversion efficiency of the third module.

[0092] Furthermore, the voltage conversion device disclosed in the present invention solves the problem of large switching losses of the third module under high-frequency operation. Because of this, the capacitance of the capacitor of the third module can be reduced. In this way, the capacitor can be built inside the chip, and the third module can be operated at high frequency so that the third module can output the required conversion voltage signal.

[0093] The present disclosure also proposes a chip, which includes the voltage conversion device.

[0094] The present disclosure also provides a display panel, the display panel comprising:

[0095] Display components;

[0096] The chip.

[0097] In a possible implementation, the display component includes at least one of a liquid crystal display component, a light emitting diode display component, and an organic light emitting diode display component.

[0098] Of course, in other implementations, the display component may also include a display component formed by other materials / devices, and the present disclosure does not limit this.

[0099] The present disclosure also provides an electronic device, which includes the display panel.

[0100] In a possible implementation, the electronic device is also referred to as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in Internet of Vehicles, etc.

[0101] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A voltage conversion device, characterized in that: The device comprises: A first module, configured to select at least one positive voltage signal from a plurality of input first voltage signals as a first intermediate voltage signal output, and to select at least one negative voltage signal from a plurality of input second voltage signals as a second intermediate voltage signal output; a second module, electrically connected to the first module, for receiving an input signal, the first intermediate voltage signal and the second intermediate voltage signal, and using the first intermediate voltage signal and the second intermediate voltage signal as the positive amplitude and the negative amplitude of the input signal, respectively, and outputting a buffer signal, wherein the first intermediate voltage signal is input to the positive power supply terminal of the second module, and the second intermediate voltage signal is input to the negative power supply terminal of the second module; A third module is electrically connected to the second module and is used to output a conversion voltage signal according to the buffer signal. The first module is also used to receive the input signal, and the step of selecting at least one positive voltage signal from the input multiple first voltage signals as a first intermediate voltage signal output, and selecting at least one negative voltage signal from the input multiple second voltage signals as a second intermediate voltage signal output, comprises: When the input signal is at a rising edge and the input signal is less than a threshold voltage, the second output terminal of the first module sequentially outputs the second intermediate voltage signal in order from low to high, and the first output terminal of the first module outputs the threshold voltage, wherein the threshold voltage is a ground voltage; When the input signal is at a rising edge and the input signal is greater than the threshold voltage, the first output terminal of the first module outputs the first intermediate voltage signal in sequence from low to high, and the second output terminal of the first module outputs the second intermediate voltage signal of the threshold voltage, further comprising: When the input signal is at a falling edge and the input signal is greater than the threshold voltage, the first output terminal of the first module outputs the first intermediate voltage signal in sequence from high to low, and the second output terminal of the first module outputs the threshold voltage; When the input signal is at a falling edge and is less than the threshold voltage, the second output end of the first module outputs the second intermediate voltage signal in sequence from high to bottom, and the first output end of the first module outputs the threshold voltage.

2. The device according to claim 1, characterized in that The first module is further used to receive a control signal, and the control signal corresponds to the first intermediate voltage signal and the second intermediate voltage signal one by one, wherein: The method of selecting at least one positive voltage signal from a plurality of input first voltage signals as a first intermediate voltage signal output, and selecting at least one negative voltage signal from a plurality of input second voltage signals as a second intermediate voltage signal output, comprises: The first module is further configured to output a first intermediate voltage signal or a second intermediate voltage signal corresponding to the control signal when the control signal is received.

3. The device according to claim 1, characterized in that The first module includes a first multiplexer and a second multiplexer, The second module includes a plurality of cascaded inverters, wherein the positive power supply terminals of the plurality of inverters are electrically connected to the output terminal of the first multiplexer for inputting the first intermediate voltage signal, and the negative power supply terminals of the plurality of inverters are electrically connected to the output terminal of the second multiplexer for inputting the second intermediate voltage signal.

4. The device according to claim 1, characterized in that The third module includes a plurality of transistors, each of which is electrically connected to the corresponding second module and the first module in sequence.

5. The device according to claim 1, characterized in that The third module includes a first transistor, a second transistor, a third transistor, a fourth transistor and a capacitor, wherein: The source of the first transistor is electrically connected to the drain of the third transistor and the first end of the capacitor, and the drain of the second transistor is connected to the source of the fourth transistor and the second end of the capacitor; The gates of the first transistor, the second transistor, the third transistor, and the fourth transistor are used to input the buffer signal, and the buffer signal is used to drive the first transistor, the second transistor, the third transistor, and the fourth transistor. The source of the third transistor or the drain of the fourth transistor is used to output a conversion voltage signal.

6. A chip, characterized in that: The chip comprises the voltage conversion device as described in any one of claims 1-5.

7. A display panel, characterized in that: The display panel comprises: Display components; The chip as claimed in claim 6.

8. The display panel according to claim 7, characterized in that: The display component includes a liquid crystal display component, the liquid crystal display component includes a light emitting diode display component, and the light emitting diode display component includes an organic light emitting diode display component.

9. An electronic device, characterized in that: The electronic device comprises the display panel according to claim 7 or 8.

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