Power supply circuit and electronic equipment

Abstract

The utility model relates to a power supply circuit and electronic equipment, and the power supply circuit comprises a first voltage conversion circuit, the first end of the first voltage conversion circuit is used for being coupled with a battery, and the first voltage conversion circuit is used for increasing the voltage of the battery; the first end of the second voltage conversion circuit is coupled with the second end of the first voltage conversion circuit, the second end of the second voltage conversion circuit is used for being coupled with a screen, and the second voltage conversion circuit is used for converting the output voltage of the first voltage conversion circuit so as to supply power to the screen; the first end of the third voltage conversion circuit is used for being coupled with the battery, the second end of the third voltage conversion circuit is used for being coupled with the screen, and the third voltage conversion circuit is used for converting the voltage of the battery to supply power to the screen. In the voltage conversion process, the third voltage conversion circuit only performs primary voltage conversion, so that the loss is reduced, and the conversion efficiency of the power supply circuit is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of power supply technology, and in particular to a power supply circuit and electronic equipment. Background Art

[0002] The power supply circuit converts the voltage of the battery and outputs it to the screen to supply power to the screen so that the screen can display images. However, during the voltage conversion process, the power supply circuit has a problem of low conversion efficiency. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a power supply circuit and an electronic device.

[0004] According to a first aspect of the present disclosure, a power supply circuit is provided, the power supply circuit comprising:

[0005] a first voltage conversion circuit, wherein a first end of the first voltage conversion circuit is used to couple with a battery, and the first voltage conversion circuit is used to increase the voltage of the battery;

[0006] a second voltage conversion circuit, wherein a first end of the second voltage conversion circuit is coupled to a second end of the first voltage conversion circuit, the second end of the second voltage conversion circuit is used to couple to a screen, and the second voltage conversion circuit is used to convert an output voltage of the first voltage conversion circuit to power the screen;

[0007] A third voltage conversion circuit, wherein the first end of the third voltage conversion circuit is used to couple with the battery, the second end of the third voltage conversion circuit is used to couple with the screen, and the third voltage conversion circuit is used to convert the voltage of the battery to power the screen.

[0008] In some embodiments of the present disclosure, the first voltage conversion circuit includes a first boost circuit, a first buck-boost circuit, or a charge pump circuit.

[0009] In some embodiments of the present disclosure, a voltage ratio between an input voltage and an output voltage of the charge pump circuit is 1:2 and / or 1:4.

[0010] In some embodiments of the present disclosure, the second voltage conversion circuit includes:

[0011] A first step-down circuit, wherein a first end of the first step-down circuit is coupled to a second end of the first voltage conversion circuit, and the second end of the first step-down circuit is used to couple to a first end of the screen.

[0012] In some embodiments of the present disclosure, the third voltage conversion circuit includes:

[0013] a second boost circuit, wherein a first end of the second boost circuit is used to couple with the battery, and a second end of the second boost circuit is used to couple with a second end of the screen;

[0014] A second buck-boost circuit, wherein a first end of the second buck-boost circuit is used to couple with the battery, and a second end of the second buck-boost circuit is used to couple with a third end of the screen.

[0015] In some embodiments of the present disclosure, the second voltage conversion circuit further includes:

[0016] a second step-down circuit, wherein a first end of the second step-down circuit is coupled to a second end of the first voltage conversion circuit, and a second end of the second step-down circuit is used to couple to a second end of the screen;

[0017] The third voltage conversion circuit comprises:

[0018] a second buck-boost circuit, wherein a first end of the second buck-boost circuit is used to couple with the battery, and a second end of the second buck-boost circuit is used to couple with a third end of the screen; or

[0019] The second voltage conversion circuit further includes:

[0020] a second boost circuit, wherein a first end of the second boost circuit is coupled to a second end of the first voltage conversion circuit, and a second end of the second boost circuit is used to couple to a second end of the screen;

[0021] The third voltage conversion circuit comprises:

[0022] a second buck-boost circuit, wherein a first end of the second buck-boost circuit is used to couple with the battery, and a second end of the second buck-boost circuit is used to couple with a third end of the screen; or

[0023] The second voltage conversion circuit further includes:

[0024] a second buck-boost circuit, wherein a first end of the second buck-boost circuit is coupled to a second end of the first voltage conversion circuit, and a second end of the second buck-boost circuit is used to couple to a third end of the screen;

[0025] The third voltage conversion circuit comprises:

[0026] A second boost circuit, wherein a first end of the second boost circuit is used to couple with the battery, and a second end of the second boost circuit is used to couple with a second end of the screen.

[0027] In some embodiments of the present disclosure, the power supply circuit supplies power to the pixel circuit in the screen through the first end and the third end of the screen, and the power supply circuit supplies power to the analog circuit in the screen through the second end of the screen.

[0028] In some embodiments of the present disclosure, the second end of the first voltage conversion circuit is used to couple with a functional module, and the first voltage conversion circuit is also used to supply power to the functional module.

[0029] According to a second aspect of the present disclosure, a power supply circuit is provided, the power supply circuit comprising:

[0030] A charge pump circuit, wherein a first terminal of the charge pump circuit is used to couple with a battery, and the charge pump circuit is used to increase the voltage of the battery;

[0031] A voltage conversion circuit, wherein the first end of the voltage conversion circuit is coupled to the second end of the charge pump circuit, the second end of the voltage conversion circuit is used to couple to the screen, and the voltage conversion circuit is used to convert the output voltage of the charge pump circuit to power the screen.

[0032] In some embodiments of the present disclosure, a voltage ratio between an input voltage and an output voltage of the charge pump circuit is 1:2 and / or 1:4.

[0033] In some embodiments of the present disclosure, when the voltage of the battery is greater than or equal to a preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit is 1:2; when the voltage of the battery is less than the preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit is 1:4.

[0034] In some embodiments of the present disclosure, the voltage conversion circuit includes:

[0035] a first step-down circuit, wherein a first end of the first step-down circuit is coupled to a second end of the charge pump circuit, and a second end of the first step-down circuit is used to couple to a first end of the screen;

[0036] a second step-down circuit, wherein a first end of the second step-down circuit is coupled to a second end of the charge pump circuit, and a second end of the second step-down circuit is used to couple to a second end of the screen;

[0037] A buck-boost circuit, wherein the first end of the buck-boost circuit is coupled to the second end of the charge pump circuit, and the second end of the buck-boost circuit is used to couple to the third end of the screen.

[0038] According to a third aspect of the present disclosure, an electronic device is provided, comprising the power supply circuit as described above.

[0039] In some embodiments of the present disclosure, the circuits other than the inductor in the second voltage conversion circuit and the third voltage conversion circuit are arranged in the power management circuit of the electronic device, or the circuits other than the inductor in the voltage conversion circuit are arranged in the power management circuit of the electronic device.

[0040] In some embodiments of the present disclosure, the second voltage conversion circuit includes a first step-down circuit, a first inductor in the first step-down circuit is coupled between a first end of the power management circuit and a first end of the screen; the third voltage conversion circuit includes a second boost circuit and a second buck-boost circuit, a second inductor in the second boost circuit is coupled between the battery and the second end of the power management circuit, and a third inductor in the second buck-boost circuit is coupled between a third end of the power management circuit and a ground end; or,

[0041] The voltage conversion circuit includes a first step-down circuit, a second step-down circuit and a boost-boost circuit, the first inductor in the first step-down circuit is coupled between the first end of the power management circuit and the first end of the screen, the second inductor in the second step-down circuit is coupled between the fourth end of the power management circuit and the second end of the screen, and the third inductor in the boost-boost circuit is coupled between the third end of the power management circuit and the ground end.

[0042] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0043] The power supply circuit includes a first voltage conversion circuit, a second voltage conversion circuit and a third voltage conversion circuit. The first voltage conversion circuit and the second voltage conversion circuit supply power to the screen in a two-stage voltage conversion manner, and the third voltage conversion circuit supplies power to the screen in a one-stage voltage conversion manner. Since the third voltage conversion circuit only performs one-stage voltage conversion during the voltage conversion process, the loss is reduced, thereby improving the conversion efficiency of the power supply circuit. At the same time, since the first voltage conversion circuit and the second voltage conversion circuit perform two-stage voltage conversion, the voltage output to the screen by the second voltage conversion circuit is stable, thereby improving the reliability of the power supply circuit. In addition, since the first voltage conversion circuit only needs to output electrical energy to the second voltage conversion circuit and does not need to output electrical energy to the third voltage conversion circuit, the output power required by the first voltage conversion circuit is reduced, thereby reducing the cost of the power supply circuit.

[0044] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0046] Figure 1 It is a schematic diagram of the structure of a power supply circuit;

[0047] Figure 2 is a structural schematic diagram of a power supply circuit provided by an exemplary embodiment of the present disclosure;

[0048] Figure 3-1 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0049] Figure 3-2 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0050] Figure 3-3 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0051] Figure 3-4 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0052] Figure 4 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0053] Figure 5 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0054] Figure 6 is a schematic structural diagram of an electronic device provided by an exemplary embodiment of the present disclosure;

[0055] Figure 7 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0056] Figure 8 is a structural schematic diagram of a power supply circuit provided by another exemplary embodiment of the present disclosure;

[0057] Fig. 9 is a structural schematic diagram of an electronic device provided by another exemplary embodiment of the present disclosure;

[0058] Fig.10 is a system block diagram of an electronic device provided by an exemplary embodiment of the present disclosure.

[0059] In the figure:

[0060] 1-battery; 2-screen; 10-first voltage conversion circuit; 11-first boost circuit; 20-second voltage conversion circuit; 21-first buck circuit; 22-second buck circuit; 30-third voltage conversion circuit; 31-second boost circuit; 32-second buck-boost circuit; 40-functional module; 50-power management circuit; 60-charge pump circuit; 70-voltage conversion circuit; 71-buck-boost circuit; 400-electronic device; 402-processing component; 404-memory; 406-power component; 408-multimedia component; 410-audio component; 412-input / output interface; 414-sensor component; 416-communication component; 420-processor; L1-first inductor; L2-second inductor; L3-third inductor; GND-ground terminal. DETAILED DESCRIPTION

[0061] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. On the contrary, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0062] With the development of electronic devices, the screens of electronic devices can display delicate images to improve the viewing experience of users. Since the screen has a variety of different circuits and different circuits require different power supply voltages, the power supply circuit needs to power the screen in a multi-channel power supply manner.

[0063] In the related art, a power supply circuit is provided, such as Figure 1 As shown, the power supply circuit includes a first voltage conversion circuit 10 and a second voltage conversion circuit 20. The first end of the first voltage conversion circuit 10 is used to couple with the battery 1, and the second end is coupled with the first end of the second voltage conversion circuit 20, so as to increase the voltage of the battery 1. The second end, the third end and the fourth end of the second voltage conversion circuit 20 are respectively used to couple with the first end, the second end and the third end of the screen 2, so as to convert the output voltage of the first voltage conversion circuit 10 to provide three-way power supply to the screen 2. Although the power supply circuit can provide three-way power supply to the screen 2 through the first voltage conversion circuit 10 and the second voltage conversion circuit 20, since each level of the voltage conversion circuit has a loss, the power supply circuit that supplies power to the screen 2 in a two-level voltage conversion manner has the problem of low conversion efficiency. At the same time, since the three-way power supply of the screen 2 is provided by the first voltage conversion circuit 10, the output power of the first voltage conversion circuit 10 is high, resulting in high cost of the power supply circuit.

[0064] Based on this, the present disclosure provides a power supply circuit, which powers the screen in a two-stage voltage conversion manner through a first voltage conversion circuit and a second voltage conversion circuit, and powers the screen in a one-stage voltage conversion manner through a third voltage conversion circuit. Since the third voltage conversion circuit powers the screen in a one-stage voltage conversion manner, the loss generated by the one-stage voltage conversion is reduced, thereby improving the conversion efficiency of the power supply circuit. At the same time, since the first voltage conversion circuit does not need to output electrical energy to the third voltage conversion circuit, the output power required by the first voltage conversion circuit is reduced, thereby reducing the cost of the power supply circuit.

[0065] An exemplary embodiment of the present disclosure provides a power supply circuit, such as Figure 2 As shown, the power supply circuit includes a first voltage conversion circuit 10, a second voltage conversion circuit 20 and a third voltage conversion circuit 30. The first end of the first voltage conversion circuit 10 is used to couple with the battery 1, and is used to increase the voltage of the battery 1. The first end of the second voltage conversion circuit 20 is coupled with the second end of the first voltage conversion circuit 10, and the second end is used to couple with the screen 2, and is used to convert the output voltage of the first voltage conversion circuit 10 to power the screen 2. The first end of the third voltage conversion circuit 30 is used to couple with the battery 1, and the second end is used to couple with the screen 2, and is used to convert the voltage of the battery 1 to power the screen 2.

[0066] In this embodiment, the power supply circuit includes a first voltage conversion circuit, a second voltage conversion circuit and a third voltage conversion circuit. The first voltage conversion circuit and the second voltage conversion circuit supply power to the screen in a two-stage voltage conversion manner, and the third voltage conversion circuit supplies power to the screen in a one-stage voltage conversion manner. Since the third voltage conversion circuit only performs one-stage voltage conversion during the voltage conversion process, the loss is reduced, thereby improving the conversion efficiency of the power supply circuit. At the same time, since the first voltage conversion circuit and the second voltage conversion circuit perform two-stage voltage conversion, the voltage output to the screen by the second voltage conversion circuit is stable, thereby improving the reliability of the power supply circuit. In addition, since the first voltage conversion circuit only needs to output electrical energy to the second voltage conversion circuit and does not need to output electrical energy to the third voltage conversion circuit, the output power required by the first voltage conversion circuit is reduced, thereby reducing the cost of the power supply circuit.

[0067] Exemplarily, the first terminal of the first voltage conversion circuit 10 and the first terminal of the third voltage conversion circuit 30 are both used to couple with the positive electrode of the battery 1. The negative electrode of the battery 1 is coupled with the ground terminal.

[0068] In one embodiment, the first voltage conversion circuit 10 includes a first boost circuit.

[0069] In this embodiment, since the power supply voltage of the screen is close to the voltage of the battery, if the voltage of the battery is directly converted by the second voltage conversion circuit, it is difficult for the power supply circuit to stably supply power to the screen. By using the first boost circuit as the first voltage conversion circuit to increase the voltage of the battery, the output voltage of the second voltage conversion circuit is stable, thereby improving the reliability of the power supply circuit. At the same time, since the structure of the first boost circuit is simple and the control method of the first boost circuit is simple, the complexity of the power supply circuit structure is reduced.

[0070] In one embodiment, the first voltage conversion circuit 10 includes a first buck-boost circuit.

[0071] In this embodiment, since the screen power supply voltage is close to the battery voltage, if the battery voltage is directly converted by the second voltage conversion circuit, it is difficult for the power supply circuit to stably supply power to the screen. By using the first step-up / step-down circuit as the first voltage conversion circuit to increase the battery voltage, the output voltage of the second voltage conversion circuit is stable, thereby improving the reliability of the power supply circuit.

[0072] In one embodiment, the first voltage conversion circuit 10 includes a charge pump circuit.

[0073] In this embodiment, since the power supply voltage of the screen is close to the battery voltage, if the battery voltage is directly converted through the second voltage conversion circuit, it is difficult for the power supply circuit to stably supply power to the screen. By using the charge pump circuit as the first voltage conversion circuit to increase the battery voltage, the output voltage of the second voltage conversion circuit is stable, thereby improving the reliability of the power supply circuit. At the same time, since the charge pump circuit has a high conversion efficiency, it can reduce the loss of the two-stage voltage conversion, thereby improving the conversion efficiency of the power supply circuit.

[0074] In one embodiment, the voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:2.

[0075] In this embodiment, since the voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:2, when the battery voltage is high, the input voltage and the output voltage of the second voltage conversion circuit can be close to each other, thereby improving the conversion efficiency of the power supply circuit.

[0076] In one embodiment, the voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:4.

[0077] In this embodiment, since the voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:4, the output voltage of the second voltage conversion circuit can be stabilized when the battery voltage is low, thereby improving the reliability of the power supply circuit.

[0078] In one embodiment, the voltage ratios of the input voltage to the output voltage of the charge pump circuit are 1:2 and 1:4.

[0079] In this embodiment, since the voltage ratios of the input voltage and the output voltage of the charge pump circuit are 1:2 and 1:4, when the battery voltage is different, it is possible to adjust the input voltage and the output voltage of the second voltage conversion circuit to be close and stabilize the output voltage of the second voltage conversion circuit, thereby improving the conversion efficiency and reliability of the power supply circuit.

[0080] In one embodiment, when the voltage of the battery 1 is greater than or equal to the preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit is 1:2. When the voltage of the battery 1 is less than the preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit is 1:4.

[0081] In this embodiment, when the voltage of the battery is greater than or equal to the preset voltage, the voltage of the battery is relatively high. If the voltage ratio of the input voltage to the output voltage of the charge pump circuit is relatively small, the difference between the input voltage and the output voltage of the second voltage conversion circuit will be relatively large. By setting the voltage ratio of the input voltage to the output voltage of the charge pump circuit to 1:2 when the voltage of the battery is greater than or equal to the preset voltage, the difference between the input voltage and the output voltage of the second voltage conversion circuit is reduced, thereby improving the conversion efficiency of the power supply circuit. When the voltage of the battery is less than the preset voltage, the voltage of the battery is relatively low. If the voltage ratio of the input voltage to the output voltage of the charge pump circuit is relatively large, the difference between the input voltage and the output voltage of the second voltage conversion circuit will be relatively small. By setting the voltage ratio of the input voltage to the output voltage of the charge pump circuit to 1:4 when the voltage of the battery is less than the preset voltage, the difference between the input voltage and the output voltage of the second voltage conversion circuit is increased, thereby improving the reliability of the power supply circuit.

[0082] Exemplarily, the value range of the preset voltage can be determined according to the voltage of the battery 1. For example, when the voltage range of the battery 1 is 2.9V to 4.5V, the value of the preset voltage can be 3.6V, 3.8V, 4V, etc.

[0083] In one embodiment, if Figure 3-1 to Figure 3-4 As shown, the second voltage conversion circuit 20 includes a first buck circuit 21. A first end of the first buck circuit 21 is coupled to a second end of the first voltage conversion circuit 10, and a second end is used to couple to a first end of the screen 2.

[0084] In this embodiment, since the voltage required by the first end of the screen is close to the voltage of the battery, after the voltage of the battery is increased by the first voltage conversion circuit, the output voltage of the first voltage conversion circuit needs to be reduced. By reducing the output voltage of the first voltage conversion circuit by the first step-down circuit, the first step-down circuit can output a stable voltage to the first end of the screen, thereby improving the reliability of the power supply circuit.

[0085] In one embodiment, if Figure 3-1 As shown, the third voltage conversion circuit 30 includes a second boost circuit 31 and a second buck-boost circuit 32. The first end of the second boost circuit 31 is used to couple with the battery 1, and the second end is used to couple with the second end of the screen 2. The first end of the second buck-boost circuit 32 is used to couple with the battery 1, and the second end is used to couple with the third end of the screen 2.

[0086] In this embodiment, since the voltage required by the second end of the screen is higher than the voltage of the battery, the second boost circuit can directly boost the voltage of the battery to the voltage required by the second end of the screen, thereby improving the conversion efficiency of the power supply circuit. Since the voltage required by the third end of the screen is inversely proportional to the voltage of the battery and its absolute value may be greater than, less than or equal to the voltage of the battery, the second boost-buck circuit can directly invert the voltage of the battery and convert it to the voltage required by the third end of the screen, thereby improving the conversion efficiency and reliability of the power supply circuit.

[0087] In one embodiment, if Figure 3-2 As shown, the second voltage conversion circuit 20 also includes a second buck circuit 22. The first end of the second buck circuit 22 is coupled to the second end of the first voltage conversion circuit 10, and the second end is used to couple with the second end of the screen 2. The third voltage conversion circuit 30 includes a second buck-boost circuit 32. The first end of the second buck-boost circuit 32 is used to couple with the battery 1, and the second end is used to couple with the third end of the screen 2.

[0088] In this embodiment, since the output voltage of the first voltage conversion circuit may be higher than the voltage required by the second end of the screen, the output voltage of the first voltage conversion circuit can be reduced to the voltage required by the second end of the screen through the second step-down circuit, thereby improving the reliability of the power supply circuit. At the same time, since the first voltage conversion circuit and the second step-down circuit perform two-stage voltage conversion, the voltage output by the second step-down circuit to the second end of the screen is stable, thereby further improving the reliability of the power supply circuit. Since the voltage required by the third end of the screen is inverse to the voltage of the battery and its absolute value may be greater than, less than or equal to the voltage of the battery, the second step-up / step-down circuit can directly invert the voltage of the battery and convert it to the voltage required by the third end of the screen, thereby improving the conversion efficiency and reliability of the power supply circuit.

[0089] In one embodiment, if Figure 3-3 As shown, the second voltage conversion circuit 20 also includes a second boost circuit 31. The first end of the second boost circuit 31 is coupled to the second end of the first voltage conversion circuit 10, and the second end is used to couple with the second end of the screen 2. The third voltage conversion circuit 30 includes a second buck-boost circuit 32. The first end of the second buck-boost circuit 32 is used to couple with the battery 1, and the second end is used to couple with the third end of the screen 2.

[0090] In this embodiment, since the output voltage of the first voltage conversion circuit may be lower than the voltage required at the second end of the screen, the output voltage of the first voltage conversion circuit can be increased to the voltage required at the second end of the screen through the second boost circuit, thereby improving the reliability of the power supply circuit. At the same time, since the first voltage conversion circuit and the second boost circuit perform two-stage voltage conversion, the voltage output by the second boost circuit to the second end of the screen is stable, thereby further improving the reliability of the power supply circuit. Since the voltage required at the third end of the screen is inverse to the voltage of the battery and its absolute value may be greater than, less than or equal to the voltage of the battery, the second boost-boost circuit can directly invert the voltage of the battery and convert it to the voltage required at the third end of the screen, thereby improving the conversion efficiency and reliability of the power supply circuit.

[0091] In one embodiment, if Figure 3-4 As shown, the second voltage conversion circuit 20 also includes a second buck-boost circuit 32. The first end of the second buck-boost circuit 32 is coupled to the second end of the first voltage conversion circuit 10, and the second end is used to couple with the third end of the screen 2. The third voltage conversion circuit 30 includes a second boost circuit 31. The first end of the second boost circuit 31 is used to couple with the battery 1, and the second end is used to couple with the second end of the screen 2.

[0092] In this embodiment, since the voltage required by the third end of the screen is inversely proportional to the voltage of the battery and its absolute value may be greater than, less than or equal to the voltage of the battery, the second buck-boost circuit can invert the voltage of the battery and convert it to the voltage required by the third end of the screen, thereby improving the reliability of the power supply circuit. At the same time, since the first voltage conversion circuit and the second buck-boost circuit perform two-stage voltage conversion, the voltage output by the second buck-boost circuit to the third end of the screen is stable, thereby further improving the reliability of the power supply circuit. Since the output voltage of the first voltage conversion circuit may be lower than the voltage required by the second end of the screen, the output voltage of the first voltage conversion circuit can be directly increased to the voltage required by the second end of the screen through the second boost circuit, thereby improving the conversion efficiency of the power supply circuit.

[0093] Exemplarily, the first buck circuit 21 and the second buck circuit 22 may be Buck circuits. The first boost circuit and the second boost circuit 31 may be Boost circuits or Boost circuits with bypass units. The first boost-boost circuit and the second boost-boost circuit 32 may be Buck Or Boost (BOB) circuits.

[0094] In one embodiment, the power supply circuit supplies power to the pixel circuit in the screen 2 through the first end and the third end of the screen 2 , and supplies power to the analog circuit in the screen 2 through the second end of the screen 2 .

[0095] In this embodiment, since the screen has a variety of different circuits and different circuits require different power supply voltages, the power supply circuit needs to power the screen in a multi-channel power supply manner. The pixel circuit in the screen is powered by one or two-stage voltage conversion, and the pixel circuit can emit light to display the picture, thereby improving the reliability of the power supply circuit. The analog circuit in the screen is powered by one or two-stage voltage conversion, and the analog circuit can make the screen run stably, thereby further improving the reliability of the power supply circuit.

[0096] For example, the voltage of the first end of the screen 2 may be ELVDD, the voltage of the second end may be AVDD, and the voltage of the third end may be ELVSS. The voltage of the first end of the screen 2 may be 2.8V or 4.6V, the voltage of the second end may be 5.6V to 7.9V, and the voltage of the third end may be -6.4V to -1.4V.

[0097] In one embodiment, if Figure 4 As shown, the second end of the first voltage conversion circuit 10 is used to couple with the functional module 40 and also to supply power to the functional module 40 .

[0098] In this embodiment, since the first voltage conversion circuit does not need to output power to the third voltage conversion circuit, additional power can be provided when the output power remains unchanged. The first voltage conversion circuit is used to power the functional module of the electronic device, which saves the power supply circuit of the functional module, thereby reducing the complexity of the electronic device structure.

[0099] Exemplarily, the functional module 40 may be a motor module, an audio module, or the like.

[0100] An exemplary embodiment of the present disclosure provides a power supply circuit, such as Figure 5As shown, the power supply circuit includes a first boost circuit 11, a first buck circuit 21, a second boost circuit 31 and a second buck-boost circuit 32. The first end of the first boost circuit 11 is used to couple with the positive electrode of the battery 1, the second end is coupled to the first end of the first buck circuit 21 and the functional module 40, and the third end is used to couple with the ground terminal GND. The second end of the first buck circuit 21 is used to couple with the first end of the screen 2, and the third end is used to couple with the ground terminal GND. The first end of the second boost circuit 31 is used to couple with the positive electrode of the battery 1, the second end is used to couple with the second end of the screen 2, and the third end is used to couple with the ground terminal GND. The first end of the second buck-boost circuit 32 is used to couple with the positive electrode of the battery 1, the second end is used to couple with the third end of the screen 2, and the third end is used to couple with the ground terminal GND. The negative electrode of the battery 1 is coupled to the ground terminal GND. Since the second boost circuit 31 and the second buck-boost circuit 32 only perform one-stage voltage conversion during the voltage conversion process, the loss is reduced, thereby improving the conversion efficiency of the power supply circuit. At the same time, since the first boost circuit 11 and the first buck circuit 21 perform two-stage voltage conversion, the voltage output by the first buck circuit 21 to the screen 2 is stable, thereby improving the reliability of the power supply circuit. In addition, the first boost circuit 11 supplies power to the functional module 40, which saves the power supply circuit of the functional module 40, thereby reducing the complexity of the electronic device structure.

[0101] An exemplary embodiment of the present disclosure provides an electronic device, which includes a battery 1, a screen 2 and the power supply circuit as described above.

[0102] In this embodiment, since the third voltage conversion circuit only performs one-stage voltage conversion in the process of the power supply circuit supplying power to the screen, the loss is reduced, thereby improving the conversion efficiency of the electronic device. At the same time, since the first voltage conversion circuit and the second voltage conversion circuit perform two-stage voltage conversion, the voltage output from the second voltage conversion circuit to the screen is stable, thereby improving the reliability of the electronic device. In addition, since the first voltage conversion circuit only needs to output power to the second voltage conversion circuit and does not need to output power to the third voltage conversion circuit, the output power required by the first voltage conversion circuit is reduced, thereby reducing the cost of the electronic device.

[0103] In one embodiment, the circuits other than the inductor in the second voltage conversion circuit 20 and the third voltage conversion circuit 30 are disposed in a power management circuit of the electronic device.

[0104] In this embodiment, by integrating the second voltage conversion circuit and the third voltage conversion circuit into the power management circuit, the space occupied by the second voltage conversion circuit and the third voltage conversion circuit is reduced, thereby reducing the complexity of the electronic device structure.

[0105] Exemplarily, the power management circuit may be a power management chip (Power Management Integrated Circuit, PMIC).

[0106] In one embodiment, if Figure 6 As shown, the second voltage conversion circuit 20 includes a first buck circuit 21, and a first inductor L1 in the first buck circuit 21 is coupled between a first end of the power management circuit 50 and a first end of the screen 2. The third voltage conversion circuit 30 includes a second boost circuit 31 and a second buck-boost circuit 32, and a second inductor L2 in the second boost circuit 31 is coupled between the battery 1 and a second end of the power management circuit 50, and a third inductor L3 in the second buck-boost circuit 32 is coupled between a third end of the power management circuit 50 and the ground end GND.

[0107] In this embodiment, since the inductor is difficult to integrate into the power management circuit, it is necessary to couple the corresponding inductor to the power management circuit according to the types of the second voltage conversion circuit and the third voltage conversion circuit. In the case where the second voltage conversion circuit includes a first step-down circuit, the first inductor in the first step-down circuit is coupled between the first end of the power management circuit and the first end of the screen to achieve the step-down function. In the case where the third voltage conversion circuit includes a second step-up circuit, the second inductor in the second step-up circuit is coupled between the battery and the second end of the power management circuit to achieve the step-up function. In the case where the third voltage conversion circuit includes a second step-up and step-down circuit, the third inductor in the second step-up and step-down circuit is coupled between the third end of the power management circuit and the ground terminal. By coupling the corresponding inductor to the power management circuit, the power management circuit can achieve the functions of step-down, step-up, and step-up and step-down to power the screen, thereby improving the reliability of the electronic device while reducing the complexity of the electronic device structure.

[0108] Exemplarily, the fourth end of the power management circuit 50 is used to couple with the second end of the screen 2, the fifth end is coupled with the second end of the first voltage conversion circuit 10, the sixth end is used to couple with the third end of the screen 2, and the seventh end is used to couple with the battery 1. Among them, the circuit between the first inductor L1 and the first end and the fifth end of the power management circuit 50 constitutes a first buck circuit 21, the circuit between the second inductor L2 and the second end and the fourth end of the power management circuit 50 constitutes a second boost circuit 31, and the circuit between the third inductor L3 and the third end, the sixth end and the seventh end of the power management circuit 50 constitutes a second buck-boost circuit 32.

[0109] Exemplarily, the second voltage conversion circuit 20 includes a first buck circuit 21 and a second buck circuit 22, the first inductor L1 in the first buck circuit 21 is coupled between the first end of the power management circuit 50 and the first end of the screen 2, and the fourth inductor in the second buck circuit 22 is coupled between the fourth end of the power management circuit 50 and the second end of the screen 2. The third voltage conversion circuit 30 includes a second buck-boost circuit 32, and the third inductor L3 in the second buck-boost circuit 32 is coupled between the third end of the power management circuit 50 and the ground terminal GND. Among them, the second end and the fifth end of the power management circuit 50 are both coupled to the second end of the first voltage conversion circuit 10, the sixth end is used to couple with the third end of the screen 2, and the seventh end is used to couple with the battery 1.

[0110] Exemplarily, the second voltage conversion circuit 20 includes a first buck circuit 21 and a second boost circuit 31, the first inductor L1 in the first buck circuit 21 is coupled between the first end of the power management circuit 50 and the first end of the screen 2, and the second inductor L2 in the second boost circuit 31 is coupled between the second end of the first voltage conversion circuit 10 and the second end of the power management circuit 50. The third voltage conversion circuit 30 includes a second buck-boost circuit 32, and the third inductor L3 in the second buck-boost circuit 32 is coupled between the third end of the power management circuit 50 and the ground terminal GND. Among them, the fourth end of the power management circuit 50 is used to couple with the second end of the screen 2, the fifth end is coupled with the second end of the first voltage conversion circuit 10, the sixth end is used to couple with the third end of the screen 2, and the seventh end is used to couple with the battery 1.

[0111] Exemplarily, the second voltage conversion circuit 20 includes a first buck circuit 21 and a second buck-boost circuit 32, the first inductor L1 in the first buck circuit 21 is coupled between the first end of the power management circuit 50 and the first end of the screen 2, and the third inductor L3 in the second buck-boost circuit 32 is coupled between the third end of the power management circuit 50 and the ground terminal GND. The third voltage conversion circuit 30 includes a second boost circuit 31, and the second inductor L2 in the second boost circuit 31 is coupled between the battery 1 and the second end of the power management circuit 50. Among them, the fourth end of the power management circuit 50 is used to couple with the second end of the screen 2, the fifth end and the seventh end are both coupled with the second end of the first voltage conversion circuit 10, and the sixth end is used to couple with the third end of the screen 2.

[0112] An exemplary embodiment of the present disclosure provides a power supply circuit, such as Figure 7 As shown, the power supply circuit includes a charge pump circuit 60 and a voltage conversion circuit 70. The first end of the charge pump circuit 60 is used to couple with the battery 1 to increase the voltage of the battery 1. The first end of the voltage conversion circuit 70 is coupled with the second end of the charge pump circuit 60, and the second end is used to couple with the screen 2 to convert the output voltage of the charge pump circuit 60 to power the screen 2.

[0113] In this embodiment, the power supply circuit includes a charge pump circuit and a voltage conversion circuit, and the charge pump circuit and the voltage conversion circuit power the screen in a two-stage voltage conversion manner. Since the charge pump circuit has a high conversion efficiency and reduces losses during the voltage conversion process, the conversion efficiency of the power supply circuit is improved. At the same time, since the charge pump circuit and the voltage conversion circuit perform two-stage voltage conversion, the voltage output from the voltage conversion circuit to the screen is stable, thereby improving the reliability of the power supply circuit. In addition, the voltage of the battery is increased by the charge pump circuit and then output to the voltage conversion circuit. The output power of the charge pump circuit is high so that the screen can operate stably, thereby further improving the reliability of the power supply circuit.

[0114] In one embodiment, the voltage ratio between the input voltage and the output voltage of the charge pump circuit 60 is 1:2.

[0115] In this embodiment, since the voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:2, when the battery voltage is high, the input voltage of the voltage conversion circuit can be higher than and close to the output voltage, thereby improving the conversion efficiency and reliability of the power supply circuit.

[0116] In one embodiment, the voltage ratio between the input voltage and the output voltage of the charge pump circuit 60 is 1:4.

[0117] In this embodiment, since the voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:4, when the battery voltage is low, the output voltage of the charge pump circuit can be higher than the maximum voltage required by the screen, thereby improving the reliability of the power supply circuit.

[0118] In one embodiment, the voltage ratios of the input voltage to the output voltage of the charge pump circuit 60 are 1:2 and 1:4.

[0119] In this embodiment, since the voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:2 and 1:4, when the battery voltage is different, it can be adjusted so that the input voltage of the voltage conversion circuit is higher than and close to the output voltage, thereby improving the conversion efficiency and reliability of the power supply circuit.

[0120] In one embodiment, when the voltage of the battery 1 is greater than or equal to the preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit 60 is 1:2. When the voltage of the battery 1 is less than the preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit 60 is 1:4.

[0121] In this embodiment, when the voltage of the battery is greater than or equal to the preset voltage, the voltage of the battery is relatively high. If the voltage ratio of the input voltage to the output voltage of the charge pump circuit is relatively small, the difference between the input voltage and the output voltage of the voltage conversion circuit will be relatively large. By setting the voltage ratio of the input voltage to the output voltage of the charge pump circuit to 1:2 when the voltage of the battery is greater than or equal to the preset voltage, the difference between the input voltage and the output voltage of the voltage conversion circuit is reduced and the input voltage of the voltage conversion circuit is greater than the output voltage, thereby improving the conversion efficiency of the power supply circuit. When the voltage of the battery is less than the preset voltage, the voltage of the battery is relatively low. If the voltage ratio of the input voltage to the output voltage of the charge pump circuit is relatively large, the difference between the input voltage and the output voltage of the voltage conversion circuit will be relatively small. By setting the voltage ratio of the input voltage to the output voltage of the charge pump circuit to 1:4 when the voltage of the battery is less than the preset voltage, the difference between the input voltage and the output voltage of the voltage conversion circuit is increased and the input voltage is greater than the output voltage, thereby improving the reliability of the power supply circuit.

[0122] In one embodiment, if Figure 8 As shown, the voltage conversion circuit 70 includes a first buck circuit 21, a second buck circuit 22, and a buck-boost circuit 71. The first end of the first buck circuit 21 is coupled to the second end of the charge pump circuit 60, and the second end is used to couple to the first end of the screen 2. The first end of the second buck circuit 22 is coupled to the second end of the charge pump circuit 60, and the second end is used to couple to the second end of the screen 2. The first end of the buck-boost circuit 71 is coupled to the second end of the charge pump circuit 60, and the second end is used to couple to the third end of the screen 2.

[0123] In this embodiment, since the voltage required by the first end of the screen is close to the voltage of the battery, after the voltage of the battery is increased by the charge pump circuit, the output voltage of the charge pump circuit needs to be reduced by the first step-down circuit to output a stable voltage to the first end of the screen. Since the voltage required by the second end of the screen is higher than the voltage of the battery but lower than the output voltage of the charge pump circuit, after the voltage of the battery is increased by the charge pump circuit, the output voltage of the charge pump circuit needs to be reduced by the second step-down circuit to output a stable voltage to the second end of the screen. Since the voltage required by the third end of the screen is inversely proportional to the voltage of the battery and its absolute value may be greater than, less than or equal to the voltage of the battery, after the voltage of the battery is increased by the charge pump circuit, the output voltage of the charge pump circuit needs to be converted by the step-up / step-down circuit to output a stable voltage to the third end of the screen. By converting the voltage output by the charge pump through the first step-down circuit, the second step-down circuit and the step-up / step-down circuit, the voltage conversion circuit can stably and at a higher power supply to the screen, thereby improving the reliability of the power supply circuit.

[0124] Exemplarily, the first buck circuit 21 and the second buck circuit 22 may be Buck circuits. The buck-boost circuit 71 may be a Buck Or Boost circuit.

[0125] Exemplarily, the power supply circuit supplies power to the pixel circuit in the screen 2 through the first end and the third end of the screen 2 , and supplies power to the analog circuit in the screen 2 through the second end of the screen 2 .

[0126] An exemplary embodiment of the present disclosure provides an electronic device, which includes a battery 1, a screen 2 and the power supply circuit as described above.

[0127] In this embodiment, since the conversion efficiency of the charge pump circuit is high and the loss is reduced in the process of the power supply circuit supplying power to the screen, the conversion efficiency of the electronic device is improved. At the same time, since the charge pump circuit and the voltage conversion circuit perform two-stage voltage conversion, the voltage output from the voltage conversion circuit to the screen is stable, thereby improving the reliability of the electronic device. In addition, the voltage of the battery is increased by the charge pump circuit and then output to the voltage conversion circuit. The output power of the charge pump circuit is high so that the screen can operate stably, thereby further improving the reliability of the power supply circuit.

[0128] In one embodiment, the circuits in the voltage conversion circuit 70 except the inductor are disposed in a power management circuit of the electronic device.

[0129] In this embodiment, by integrating the voltage conversion circuit into the power management circuit, the space occupied by the voltage conversion circuit is reduced, thereby reducing the complexity of the structure of the electronic device.

[0130] Exemplarily, the power management circuit may be a power management chip.

[0131] In one embodiment, if Fig. 9 As shown, the voltage conversion circuit 70 includes a first buck circuit 21, a second buck circuit 22 and a boost-boost circuit 71, the first inductor L1 in the first buck circuit 21 is coupled between the first end of the power management circuit 50 and the first end of the screen 2, the second inductor L2 in the second buck circuit 22 is coupled between the fourth end of the power management circuit 50 and the second end of the screen 2, and the third inductor L3 in the boost-boost circuit 71 is coupled between the third end of the power management circuit 50 and the ground end GND.

[0132] In this embodiment, since the inductor is difficult to integrate into the power management circuit, it is necessary to couple the corresponding inductor to the power management circuit according to the type of the voltage conversion circuit. In the case where the voltage conversion circuit includes a first buck circuit, the first inductor in the first buck circuit is coupled between the first end of the power management circuit and the first end of the screen to achieve the buck function. In the case where the voltage conversion circuit includes a second buck circuit, the second inductor in the first buck circuit is coupled between the fourth end of the power management circuit and the second end of the screen to achieve the buck function. In the case where the voltage conversion circuit includes a buck-boost circuit, the third inductor in the buck-boost circuit is coupled between the third end of the power management circuit and the ground terminal. By coupling the corresponding inductor to the power management circuit, the power management circuit can achieve the functions of bucking, boosting, and buck-boost to power the screen, thereby improving the reliability of the electronic device while reducing the complexity of the electronic device structure.

[0133] Exemplarily, the second end, the fifth end and the seventh end of the power management circuit 50 are coupled to the second end of the charge pump circuit 60, and the sixth end is used to couple to the third end of the screen 2. The circuit between the first inductor L1 and the first end and the fifth end of the power management circuit 50 constitutes a first buck circuit 21, the circuit between the second inductor L2 and the second end and the fourth end of the power management circuit 50 constitutes a second buck circuit 22, and the circuit between the third inductor L3 and the third end, the sixth end and the seventh end of the power management circuit 50 constitutes a buck-boost circuit 71.

[0134] In an exemplary embodiment, an electronic device is provided, and the electronic device is, for example, a mobile phone, a laptop computer, a tablet computer, a wearable device, etc.

[0135] refer to Fig.10 As shown, electronic device 400 may include one or more of the following components: processing component 402 , memory 404 , power component 406 , multimedia component 408 , audio component 410 , input / output (I / O) interface 412 , sensor component 414 , and communication component 416 .

[0136] The processing component 402 generally controls the overall operation of the electronic device 400, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 402 may include one or more modules to facilitate the interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate the interaction between the multimedia component 408 and the processing component 402.

[0137] The memory 404 is configured to store various types of data to support operations on the electronic device 400. Examples of such data include instructions for any application or method operating on the electronic device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0138] The power supply component 406 provides power to the various components of the electronic device 400. The power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 400.

[0139] The multimedia component 408 includes a screen that provides an output interface between the electronic device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera module and / or a rear camera module. When the electronic device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera module and / or the rear camera module may receive external multimedia data. Each front camera module and the rear camera module may be a fixed optical lens system or have a focal length and optical zoom capability.

[0140] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the electronic device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 404 or sent via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0141] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0142] The sensor assembly 414 includes one or more sensors for providing various aspects of status assessment for the electronic device 400. For example, the sensor assembly 414 can detect the open / closed state of the electronic device 400, the relative positioning of components, such as the display and keypad of the electronic device 400, and the sensor assembly 414 can also detect the position change of the electronic device 400 or a component of the electronic device 400, the presence or absence of user contact with the electronic device 400, the orientation or acceleration / deceleration of the electronic device 400, and the temperature change of the electronic device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0143] The communication component 416 is configured to facilitate wired or wireless communication between the electronic device 400 and other terminals. The electronic device 400 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0144] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0145] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0146] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0147] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0148] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A power supply circuit, characterized in that: The power supply circuit comprises: a first voltage conversion circuit, wherein a first end of the first voltage conversion circuit is used to couple with a battery, and the first voltage conversion circuit is used to increase the voltage of the battery; a second voltage conversion circuit, wherein a first end of the second voltage conversion circuit is coupled to a second end of the first voltage conversion circuit, the second end of the second voltage conversion circuit is used to couple to a screen, and the second voltage conversion circuit is used to convert an output voltage of the first voltage conversion circuit to power the screen; A third voltage conversion circuit, wherein the first end of the third voltage conversion circuit is used to couple with the battery, the second end of the third voltage conversion circuit is used to couple with the screen, and the third voltage conversion circuit is used to convert the voltage of the battery to power the screen.

2. The power supply circuit according to claim 1, characterized in that: The first voltage conversion circuit includes a first boost circuit, a first buck-boost circuit or a charge pump circuit.

3. The power supply circuit according to claim 2, characterized in that: The voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:2 and / or 1:

4.

4. The power supply circuit according to claim 1, characterized in that: The second voltage conversion circuit comprises: A first step-down circuit, wherein a first end of the first step-down circuit is coupled to a second end of the first voltage conversion circuit, and the second end of the first step-down circuit is used to couple to a first end of the screen.

5. The power supply circuit according to claim 4, characterized in that: The third voltage conversion circuit comprises: a second boost circuit, wherein a first end of the second boost circuit is used to couple with the battery, and a second end of the second boost circuit is used to couple with a second end of the screen; A second buck-boost circuit, wherein a first end of the second buck-boost circuit is used to couple with the battery, and a second end of the second buck-boost circuit is used to couple with a third end of the screen.

6. The power supply circuit according to claim 4, characterized in that: The second voltage conversion circuit further includes: a second step-down circuit, wherein a first end of the second step-down circuit is coupled to a second end of the first voltage conversion circuit, and a second end of the second step-down circuit is used to couple to a second end of the screen; The third voltage conversion circuit comprises: a second buck-boost circuit, wherein a first end of the second buck-boost circuit is used to couple with the battery, and a second end of the second buck-boost circuit is used to couple with a third end of the screen; or The second voltage conversion circuit further includes: a second boost circuit, wherein a first end of the second boost circuit is coupled to a second end of the first voltage conversion circuit, and a second end of the second boost circuit is used to couple to a second end of the screen; The third voltage conversion circuit comprises: a second buck-boost circuit, wherein a first end of the second buck-boost circuit is used to couple with the battery, and a second end of the second buck-boost circuit is used to couple with a third end of the screen; or The second voltage conversion circuit further includes: a second buck-boost circuit, wherein a first end of the second buck-boost circuit is coupled to a second end of the first voltage conversion circuit, and a second end of the second buck-boost circuit is used to couple to a third end of the screen; The third voltage conversion circuit comprises: A second boost circuit, wherein a first end of the second boost circuit is used to couple with the battery, and a second end of the second boost circuit is used to couple with a second end of the screen.

7. The power supply circuit according to claim 5 or 6, characterized in that: The power supply circuit supplies power to the pixel circuit in the screen through the first end and the third end of the screen, and the power supply circuit supplies power to the analog circuit in the screen through the second end of the screen.

8. The power supply circuit according to any one of claims 1 to 6, characterized in that: The second end of the first voltage conversion circuit is used to couple with the functional module, and the first voltage conversion circuit is also used to supply power to the functional module.

9. A power supply circuit, characterized in that: The power supply circuit comprises: A charge pump circuit, wherein a first terminal of the charge pump circuit is used to couple with a battery, and the charge pump circuit is used to increase the voltage of the battery; A voltage conversion circuit, wherein the first end of the voltage conversion circuit is coupled to the second end of the charge pump circuit, the second end of the voltage conversion circuit is used to couple to the screen, and the voltage conversion circuit is used to convert the output voltage of the charge pump circuit to power the screen.

10. The power supply circuit according to claim 9, characterized in that: The voltage ratio between the input voltage and the output voltage of the charge pump circuit is 1:2 and / or 1:

4.

11. The power supply circuit according to claim 10, characterized in that: When the battery voltage is greater than or equal to the preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit is 1:2; when the battery voltage is less than the preset voltage, the voltage ratio of the input voltage to the output voltage of the charge pump circuit is 1:

4.

12. The power supply circuit according to any one of claims 9 to 11, characterized in that: The voltage conversion circuit comprises: a first step-down circuit, wherein a first end of the first step-down circuit is coupled to a second end of the charge pump circuit, and a second end of the first step-down circuit is used to couple to a first end of the screen; a second step-down circuit, wherein a first end of the second step-down circuit is coupled to a second end of the charge pump circuit, and a second end of the second step-down circuit is used to couple to a second end of the screen; A buck-boost circuit, wherein the first end of the buck-boost circuit is coupled to the second end of the charge pump circuit, and the second end of the buck-boost circuit is used to couple to the third end of the screen.

13. An electronic device, characterized in that: The electronic device comprises the power supply circuit according to any one of claims 1 to 12.

14. The electronic device according to claim 13, characterized in that: The circuits other than the inductor in the second voltage conversion circuit and the third voltage conversion circuit are arranged in the power management circuit of the electronic device, or the circuits other than the inductor in the voltage conversion circuit are arranged in the power management circuit of the electronic device.

15. The electronic device according to claim 14, characterized in that: The second voltage conversion circuit includes a first step-down circuit, a first inductor in the first step-down circuit is coupled between the first end of the power management circuit and the first end of the screen; the third voltage conversion circuit includes a second boost circuit and a second buck-boost circuit, a second inductor in the second boost circuit is coupled between the battery and the second end of the power management circuit, and a third inductor in the second buck-boost circuit is coupled between the third end of the power management circuit and the ground end; or, The voltage conversion circuit includes a first step-down circuit, a second step-down circuit and a boost-boost circuit, the first inductor in the first step-down circuit is coupled between the first end of the power management circuit and the first end of the screen, the second inductor in the second step-down circuit is coupled between the fourth end of the power management circuit and the second end of the screen, and the third inductor in the boost-boost circuit is coupled between the third end of the power management circuit and the ground end.

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