Power supply circuit, power supply device and electronic equipment

Abstract

The embodiment of the utility model provides a power supply circuit, a power supply device and electronic equipment, and relates to the technical field of electronic equipment power supply. The power supply circuit is used for electronic equipment. The electronic device includes a display panel and a battery. The display panel comprises a light-emitting device, and the battery supplies power to the light-emitting device through the power supply circuit. The power supply circuit comprises an anode power supply circuit and a cathode power supply circuit. The input end of the anode power supply circuit is electrically connected with the battery, and the output end of the anode power supply circuit is electrically connected with the anode of the luminescent device. The input end of the cathode power supply circuit is electrically connected with the battery, and the output end of the cathode power supply circuit is electrically connected with the cathode of the light-emitting device. The anode power supply circuit comprises an anode boost-buck circuit. In the embodiment of the invention, when the electric quantity of the battery is relatively small and the output voltage is relatively low, the anode boost-buck circuit can boost the voltage from the battery, so that the working requirement of the light-emitting device is met, and the standby time of the electronic equipment is prolonged.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of power supply for electronic devices, and in particular, to a power supply circuit, a power supply device, and an electronic device. Background Art

[0002] The electronic device includes a battery and a display panel, the display panel is electrically connected to the battery, and the battery is used to power the display panel. In the related art, when the battery power is low, the output voltage of the battery decreases and cannot meet the working requirements of the display panel, and the electronic device shuts down, affecting the standby time of the electronic device. Utility Model Content

[0003] The embodiments of the present application provide a power supply circuit, a power supply device and an electronic device, which are used to extend the standby time of the electronic device and improve the performance of the electronic device.

[0004] On the one hand, an embodiment of the present application provides a power supply circuit, which is used for an electronic device. The electronic device includes a display panel and a battery. The display panel includes a light-emitting device, and the battery supplies power to the light-emitting device through the power supply circuit. The power supply circuit includes an anode power supply circuit and a cathode power supply circuit. The input end of the anode power supply circuit is electrically connected to the battery, and the output end of the anode power supply circuit is electrically connected to the anode of the light-emitting device. The input end of the cathode power supply circuit is electrically connected to the battery, and the output end of the cathode power supply circuit is electrically connected to the cathode of the light-emitting device. Among them, the anode power supply circuit includes an anode boost-buck circuit.

[0005] In the embodiment of the present application, an anode power supply circuit is provided including an anode boost-buck circuit, and the anode boost-buck circuit is connected in series between the battery and the anode of the light-emitting device. In this way, when the battery power is low and the output voltage is small (for example, less than the set voltage), the anode boost-buck circuit can increase the voltage from the battery to a voltage greater than or equal to the set voltage, and transmit it to the anode of the light-emitting device to meet the working requirements of the light-emitting device, so that the light-emitting device can emit light, prolong the standby time of the electronic device, and improve the performance of the electronic device. On the contrary, when the battery power is high and the output voltage is large (for example, greater than or equal to the set voltage), the anode boost-buck circuit can reduce the voltage from the battery to meet the working requirements of the light-emitting device.

[0006] That is, the anode power supply circuit includes a boost-buck circuit. When the battery power is low and the output voltage is small (for example, less than the set voltage), the anode power supply circuit can provide the light-emitting device with an anode driving voltage that meets the working requirements, so that the display panel can work normally.

[0007] In some possible implementations, the anode boost-buck circuit includes a BUCK-BOOST circuit. This configuration enables the anode boost-buck circuit to achieve boosting and bucking.

[0008] In some possible implementations, the anode boost-buck circuit includes a boost-path circuit and an anode buck circuit. The input end of the boost-path circuit is electrically connected to the battery, the output end of the boost-path circuit is electrically connected to the input end of the anode buck circuit, and the output end of the anode buck circuit is electrically connected to the anode of the light-emitting device. It can be understood that when the battery power is low and the output voltage is small (for example, less than the set voltage), the boost-path circuit can increase the voltage from the battery to greater than or equal to the set voltage, and transmit the increased voltage to the anode buck circuit; when the battery power is high and the output voltage is large (for example, greater than or equal to the set voltage), the boost-path circuit can directly transmit the voltage from the battery to the anode buck circuit. In this way, the anode boost-buck circuit can achieve boost and buck, so that the anode boost-buck circuit can provide the light-emitting device with an anode drive voltage that meets the working requirements, prolonging the standby time of the electronic device and improving the performance of the electronic device.

[0009] In some possible implementations, the cathode power supply circuit includes a cathode boost-buck circuit. In this way, when the battery power is low and the output voltage is small (for example, less than the set voltage), the cathode boost-buck circuit can increase the voltage from the battery to greater than or equal to the set voltage, and transmit it to the cathode of the light-emitting device, so as to meet the working requirements of the light-emitting device, so that the light-emitting device can emit light, extend the standby time of the electronic device, and improve the performance of the electronic device. On the contrary, when the battery power is high and the output voltage is large (for example, greater than or equal to the set voltage), the cathode boost-buck circuit can increase or decrease the voltage from the battery to meet the working requirements of the light-emitting device.

[0010] In some possible implementations, the cathode boost-buck circuit includes a BUCK-BOOST circuit. This configuration enables the cathode boost-buck circuit to achieve boosting and bucking.

[0011] In some possible implementations, the input end of the cathode boost-buck circuit is electrically connected to the output end of the boost-path circuit, and the output end of the cathode boost-buck circuit is electrically connected to the cathode of the light-emitting device. It can be understood that when the battery power is low and the output voltage is small (for example, less than the set voltage), the boost-path circuit can increase the voltage from the battery to greater than or equal to the set voltage, and transmit the increased voltage to the cathode boost-buck circuit; when the battery power is high and the output voltage is large (for example, greater than or equal to the set voltage), the boost-path circuit can directly transmit the voltage from the battery to the cathode boost-buck circuit. In this way, the cathode boost-buck circuit can provide the light-emitting device with a cathode driving voltage that meets the working requirements, prolong the standby time of the electronic device, and improve the performance of the electronic device.

[0012] In some possible implementations, the display panel further includes a driver chip, the driver chip is electrically connected to the light-emitting device, and the driver chip is used to drive the light-emitting device to emit light. The power supply circuit further includes a driver power supply circuit, the input end of the driver power supply circuit is electrically connected to the battery, and the output end of the driver power supply circuit is electrically connected to the driver chip. The driver power supply circuit includes a driver boost circuit. In this arrangement, when the battery power is low and the output voltage is small (for example, less than the set voltage), the driver boost circuit can increase the voltage from the battery to greater than or equal to the set voltage, so that the driver boost circuit can provide the driver chip with a voltage that meets the working requirements, thereby extending the standby time of the electronic device and improving the performance of the electronic device.

[0013] In some possible implementations, the input end of the driving boost circuit is electrically connected to the output end of the boost-path circuit, and the output end of the driving boost circuit is electrically connected to the driving chip. It can be understood that when the battery power is low and the output voltage is small (for example, less than the set voltage), the boost-path circuit can increase the voltage from the battery to greater than or equal to the set voltage, and transmit the increased voltage to the driving boost circuit; when the battery power is high and the output voltage is large (for example, greater than or equal to the set voltage), the boost-path circuit can directly transmit the voltage from the battery to the driving boost circuit. In this way, the driving boost circuit can provide the driving chip with a voltage that meets the working requirements, prolong the standby time of the electronic device, and improve the performance of the electronic device.

[0014] On the other hand, an embodiment of the present application provides a power supply circuit. The power supply circuit is used for an electronic device. The electronic device includes a display panel and a battery. The display panel includes a light-emitting device, and the battery supplies power to the light-emitting device through the power supply circuit. The power supply circuit includes an anode power supply circuit and a cathode power supply circuit. The input end of the anode power supply circuit is electrically connected to the battery, and the output end of the anode power supply circuit is electrically connected to the anode of the light-emitting device. The input end of the cathode power supply circuit is electrically connected to the battery, and the output end of the cathode power supply circuit is electrically connected to the cathode of the light-emitting device. Among them, the anode power supply circuit includes a boost-path circuit and an anode boost circuit. The input end of the boost-path circuit is electrically connected to the battery, the output end of the boost-path circuit is electrically connected to the input end of the anode boost circuit, and the output end of the anode boost circuit is electrically connected to the anode of the light-emitting device.

[0015] The anode power supply circuit includes a boost-path circuit and an anode boost circuit, and the boost-path circuit and the anode boost circuit are connected in series between the battery and the anode of the light-emitting device. In this way, when the battery power is low and the output voltage is small (for example, less than the set voltage), the boost-path circuit and the anode boost circuit can increase the voltage from the battery to greater than or equal to the set voltage, and transmit it to the anode of the light-emitting device, so as to meet the working requirements of the light-emitting device, so that the light-emitting device can emit light, extend the standby time of the electronic device, and improve the performance of the electronic device. On the contrary, when the battery power is high and the output voltage is large (for example, greater than or equal to the set voltage), the boost-path circuit can directly transmit the voltage from the battery to the anode boost circuit, so that the anode boost circuit can provide the light-emitting device with an anode drive voltage that meets the working requirements, so that the light-emitting device can emit light.

[0016] In another aspect, an embodiment of the present application provides a power supply device, which includes a housing and a power supply circuit as described above, and the power supply circuit is located inside the housing.

[0017] The power supply device provided in the embodiment of the present application includes the power supply circuit as described above, and therefore has all the beneficial effects described above, which will not be described in detail here.

[0018] In another aspect, an embodiment of the present application provides an electronic device. The electronic device includes a display panel, a battery, and a power supply circuit as described above. The display panel includes a light emitting device. The battery supplies power to the light emitting device through the power supply circuit.

[0019] The electronic device provided in the embodiment of the present application includes the power supply circuit as described above, and thus has all the above-mentioned beneficial effects, which will not be described in detail here.

[0020] In some possible implementations, the battery is a silicon negative electrode battery. It can be understood that the silicon negative electrode battery has a larger capacity and a faster charging speed, which prolongs the standby time of the electronic device and improves the performance of the electronic device.

[0021] In some possible implementations, the minimum operating voltage of the battery is less than 3.2 V. Compared with setting the output voltage of the battery to be greater than or equal to 3.2 V, this configuration enables the battery to provide more power to the display panel, thereby extending the standby time of the electronic device and improving the performance of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an electronic device provided in some embodiments of the present application;

[0023] Figure 2 A schematic diagram of the structure of an electronic device provided in some other embodiments of the present application;

[0024] Figure 3 A schematic block diagram of the connection relationship of electronic devices provided in some embodiments of the present application;

[0025] Figure 4 A schematic block diagram of the connection relationship of electronic devices provided in some other embodiments of the present application;

[0026] Figure 5 A schematic block diagram of the connection relationship of electronic devices provided in some other embodiments of the present application;

[0027] Figure 6 A schematic block diagram of the connection relationship of electronic devices provided in some other embodiments of the present application;

[0028] Figure 7 A schematic diagram of a circuit topology of a BUCK-BOOST circuit provided in some embodiments of the present application;

[0029] Figure 8 A schematic block diagram of the connection relationship of electronic devices provided in some other embodiments of the present application;

[0030] Fig. 9 A schematic diagram of a circuit topology of a BUCK circuit provided in some embodiments of the present application;

[0031] Fig.10 A schematic block diagram of the connection relationship of electronic devices provided in some other embodiments of the present application;

[0032] Fig.11 A schematic diagram of a circuit topology of a BOOST circuit provided in some embodiments of the present application;

[0033] Fig.12 A schematic block diagram of the connection relationship of electronic devices provided in some other embodiments of the present application;

[0034] Fig.13 A schematic block diagram of the connection relationship of electronic devices provided in some further embodiments of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present application.

[0036] Unless the context requires otherwise, throughout the specification and claims, the term "include" and its other forms, such as the third person singular form "include" and the present participle form "include", are interpreted as open, inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

[0037] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to 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 one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0038] Figure 1 A schematic diagram of the structure of an electronic device provided for some embodiments of the present application. Figure 2 A schematic diagram of the structure of an electronic device provided for some other embodiments of the present application. Figure 3 A schematic block diagram of the connection relationship of electronic devices provided in some embodiments of the present application. Figure 4 A schematic block diagram of the connection relationship of electronic devices provided in some other embodiments of the present application.

[0039] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides an electronic device 200. For example, the electronic device 200 may be a terminal device, such as a mobile phone, a tablet computer, a personal computer, a smart bracelet, etc. It is understandable that the embodiment of the present application does not further limit the type of the electronic device 200.

[0040] The electronic device 200 includes a load, such as a display panel 210, audio, radio frequency, system on chip (SOC), etc. The system on chip may include a chip, such as a central processing unit (CPU), a graphics processing unit (GPU), or a storage chip.

[0041] The display panel 210 is used to display image information. For example, the display panel 210 can be used to display static images, such as pictures or photos. Alternatively, the display panel 210 can also be used to display dynamic images, such as videos or game screens. Figure 3 As shown, the display panel 210 includes a plurality of light emitting devices 211 , and the plurality of light emitting devices 211 are arranged in an array, so that the display panel 210 can realize a display function.

[0042] The light emitting device 211 may be an OLED (full name in English: organic light-emitting diode, Chinese name: organic light-emitting diode), that is, the display panel 210 is an OLED display panel. Compared with LCD (full name in English: liquid crystal display, Chinese name: liquid crystal display) display panels, OLED display panels have the advantages of low power consumption, thin thickness, high color contrast, and flexibility.

[0043] For example, OLED display panels can be divided into three types: LTPS (English full name: low temperature poly-silicon, Chinese name: low-temperature polycrystalline silicon technology), LTPO1.0 (English full name: low-temperature polycrystalline oxide 1.0, Chinese name: first generation low-temperature polycrystalline oxide), and LTPO2.0 (English full name: low-temperature polycrystalline oxide 2.0, Chinese name: second generation low-temperature polycrystalline oxide).

[0044] In some examples, such as Figure 3 and Figure 4 As shown, the electronic device 200 further includes a battery 220 , which is electrically connected to a load and is used to supply power to loads such as the display panel 210 , audio, radio frequency, and system on chip.

[0045] In some examples, the battery 220 is a silicon negative electrode battery. It can be understood that a silicon negative electrode battery is a lithium battery whose negative electrode material is silicon. Silicon negative electrode batteries have the advantages of large capacity and fast charging speed. Setting the battery 220 as a silicon negative electrode battery can extend the standby time of the electronic device 200 and improve the performance of the electronic device 200.

[0046] In some examples, such as Figure 3 As shown, the electronic device 200 further includes a power supply circuit 100. In other examples, such as Figure 4 As shown, the electronic device 200 includes a power supply device 230, which includes a housing (not shown) and a power supply circuit 100. The power supply circuit 100 is located in the housing (i.e., in the accommodation space surrounded by the housing), so that the housing can protect the power supply circuit 100.

[0047] like Figure 3 and Figure 4 As shown, the input terminal 100a of the power supply circuit 100 is electrically connected to the battery 220, and the output terminal 100b of the power supply circuit 100 is electrically connected to the light emitting device 211. The battery 220 supplies power to the light emitting device 211 through the power supply circuit 100.

[0048] In the embodiment of the present application, the light emitting device 211 is taken as an AMOLED (full name in English: active-matrix organic light-emitting diode, Chinese name: active-matrix organic light-emitting diode, or active-matrix organic light-emitting diode) as an example to illustrate the power supply circuit 100.

[0049] Figure 5 A schematic block diagram of the connection relationship of electronic devices provided in some further embodiments of the present application.

[0050] In some examples, such as Figure 5 As shown, the power supply circuit 100 includes an anode power supply circuit 111 and a cathode power supply circuit 112. The input terminal 111a of the anode power supply circuit 111 is electrically connected to the battery 220, and the output terminal 111b of the anode power supply circuit 111 is electrically connected to the anode of the light-emitting device 211. The input terminal 112a of the cathode power supply circuit 112 is electrically connected to the battery 220, and the output terminal 112b of the cathode power supply circuit 112 is electrically connected to the cathode of the light-emitting device 211.

[0051] The battery 220 needs to provide ELVDD (full name in English: electroluminescent driving voltage, Chinese name: electroluminescent element operating voltage, also called anode driving voltage, positive electrode driving voltage) and ELVSS (full name in English: electroluminescent series voltage, Chinese name: electroluminescent element common ground voltage, also called cathode driving voltage, negative electrode driving voltage) for the light-emitting device 211, so that the light-emitting device 211 can emit light.

[0052] Taking the display panel 210 as LTPS or LTPO1.0 as an example, the anode power supply circuit 111 receives the input anode drive voltage Vin-ELVDD from the battery 220, and boosts the received voltage to obtain the anode drive voltage ELVDD, and then transmits it to the anode of the light-emitting device 211. For example, the anode power supply circuit 111 can provide a drive voltage of 4.6V (unit: volt) for the anode of the light-emitting device 211.

[0053] Taking the display panel 210 as LTPO2.0 as an example, the anode power supply circuit 111 receives the input anode drive voltage Vin-ELVDD from the battery 220, and steps down the received voltage to obtain the anode drive voltage ELVDD, which is then transmitted to the anode of the light-emitting device 211. For example, the anode power supply circuit 111 can provide a 2.8V drive voltage for the anode of the light-emitting device 211.

[0054] It can be understood that the embodiments of the present application do not further limit the value of the anode driving voltage provided by the anode power supply circuit 111 to the light-emitting device 211.

[0055] Taking the display panel 210 as LTPS, LTPO1.0 or LTPO2.0 as an example, the cathode power supply circuit 112 receives the input cathode drive voltage Vin-ELVSS from the battery 220, and boosts the received voltage to obtain the cathode drive voltage ELVSS. Alternatively, the cathode power supply circuit 112 can also step down the received voltage to obtain the cathode drive voltage ELVSS. The cathode power supply circuit 112 can transmit the boosted or stepped-down voltage to the cathode of the light-emitting device 211. For example, the cathode power supply circuit 112 can provide a driving voltage of -3V, -4.3V or -8V for the cathode of the light-emitting device 211.

[0056] It can be understood that the embodiments of the present application do not further limit the value of the cathode driving voltage provided by the cathode power supply circuit 112 to the light-emitting device 211.

[0057] In some examples, such as Figure 5As shown, the display panel 210 also includes a driver chip 212, and the driver chip 212 is electrically connected to the light-emitting device 211. The driver chip 212 is used to drive the light-emitting device 211 to emit light. For example, the driver chip 212 can be a driver IC (English full name: integrated circuit, Chinese name: integrated circuit). The output terminal 100b of the power supply circuit 100 can be electrically connected to the driver chip 212, so that the battery 220 can supply power to the driver chip 212 through the power supply circuit 100.

[0058] The battery 220 needs to provide AVDD (English full name: analog voltage devicedrain, Chinese name: analog positive power supply, or driver chip operating voltage) for the driver chip 212, so that the driver chip 212 can work normally, thereby driving the light-emitting device 211 to emit light.

[0059] In some examples, such as Figure 5 As shown, the power supply circuit 100 further includes a driving power supply circuit 113 . An input terminal 113 a of the driving power supply circuit 113 is electrically connected to the battery 220 , and an output terminal 113 b of the driving power supply circuit 113 is electrically connected to the driving chip 212 .

[0060] The driving power supply circuit 113 receives the input driving chip operating voltage VIN-AVDD from the battery 220, and boosts the received voltage to obtain the driving chip operating voltage AVDD, and then transmits it to the driving chip 212. For example, the driving power supply circuit 113 can provide the driving chip 212 with a driving voltage of about 6.5V or 7.6V.

[0061] It can be understood that the embodiment of the present application does not further limit the value of the driver chip operating voltage provided by the driver power supply circuit 113 to the driver chip 212.

[0062] In some examples, the anode power supply circuit 111, the cathode power supply circuit 112, the drive power supply circuit 113 and the drive chip 212 can be integrated on the same PCB (full name in English: Printed Circuit Board, Chinese name: printed circuit board). In other examples, the anode power supply circuit 111, the cathode power supply circuit 112, the drive power supply circuit 113 and the drive chip 212 can also be respectively arranged on multiple different PCBs.

[0063] In some examples, the minimum operating voltage of battery 220 is less than 3.2V.

[0064] It can be understood that the minimum operating voltage of the battery 220 is the minimum voltage at which the battery 220 can operate. When the battery voltage (i.e., the output voltage) of the battery 220 is greater than or equal to the minimum operating voltage of the battery 220, the power provided by the battery 220 can meet the working requirements of the display panel 210, and the electronic device 200 can operate normally. On the contrary, when the battery voltage of the battery 220 is less than the minimum operating voltage of the battery 220, the power provided by the battery 220 cannot meet the working requirements of the display panel 210, and the electronic device 200 is in a shutdown state.

[0065] At present, the shutdown voltage of electronic devices is generally 3.2V, that is, when the battery power is reduced and the battery output voltage is reduced to 3.2V, the display panel, audio, radio frequency, SOC and other components stop working, and the electronic device is shut down. The battery 220 can release more power at a lower voltage. If this part of power is used, the standby time of the electronic device will be effectively extended.

[0066] Therefore, setting the minimum operating voltage of battery 220 to be less than 3.2V, compared with setting the output voltage of battery 220 to be greater than or equal to 3.2V, enables battery 220 to provide more power for display panel 210, prolongs the standby time of electronic device 200, and improves the performance of electronic device 200.

[0067] For example, the minimum operating voltage of the battery 220 may be 3.0V, 2.8V, 2.5V, or 2.3V.

[0068] In some examples, the circuit structure inside the light-emitting device 211 and the circuit structure inside the driver chip 212 can be changed so that the light-emitting device 211 and the driver chip 212 can adapt to low voltage. That is, when the battery 220 is low in power and the output voltage is small (less than the set voltage), the driver chip 212 can drive the light-emitting device 211 to emit light.

[0069] For example, the control logic of different electronic components in the light emitting device 211 and the driver chip 212 can be modified so that the light emitting device 211 can adapt to low voltage. In addition, the impedance of the MOSFET (metal-oxide-semiconductor field-effect transistor) in the light emitting device 211 and the driver chip 212 can be reduced to reduce the loss of the MOSFET at low voltage and high current.

[0070] Figure 6 A schematic block diagram of the connection relationship of electronic devices provided in some further embodiments of the present application. Figure 7A schematic diagram of the circuit topology of a BUCK-BOOST circuit provided in some embodiments of the present application.

[0071] In other examples, the structure of the power supply circuit 100 may also be changed so that the light emitting device 211 and the driving chip 212 can adapt to low voltage.

[0072] Taking the display panel 210 as LTPO2.0 as an example, for example, Figure 6 As shown, the anode power supply circuit 111 includes an anode boost-buck circuit 1111 .

[0073] It can be understood that the input terminal 111a of the anode boost-buck circuit 1111 is electrically connected to the battery 220, the output terminal 1111b of the anode boost-buck circuit 1111 is electrically connected to the anode of the light-emitting device 211, and the anode boost-buck circuit 1111 is connected in series between the battery 220 and the anode of the light-emitting device 211. The anode boost-buck circuit 1111 can not only increase the voltage from the battery 220, but also decrease the voltage from the battery 220.

[0074] When the battery 220 has a low power level and a low output voltage (e.g., less than a set voltage), the anode boost-buck circuit 111 can increase the voltage from the battery 220 to a level greater than or equal to the set voltage, and transmit it to the anode of the light-emitting device 211, so as to meet the working requirements of the light-emitting device 211, so that the light-emitting device 211 can emit light, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200. On the contrary, when the battery 220 has a high power level and a high output voltage (e.g., greater than or equal to a set voltage), the anode boost-buck circuit 111 can reduce the voltage from the battery 220 to meet the working requirements of the light-emitting device 211.

[0075] That is, the anode power supply circuit 111 includes a boost-buck circuit 1111. When the battery 220 is low in power and the output voltage is small (for example, less than the set voltage), the anode power supply circuit 111 can provide the light-emitting device 211 with an anode driving voltage that meets working requirements, so that the display panel 210 can work normally.

[0076] In some examples, anode boost-buck circuit 1111 includes a BUCK-BOOST circuit.

[0077] For example, Figure 7As shown, the BUCK-BOOST circuit may include a first inductor L1, a first switch tube Q1, a first diode D1 and a first capacitor C1. The first connection end of the first switch tube Q1 is electrically connected to the battery 220, the second connection end of the first switch tube Q1 is electrically connected to the first connection end of the first inductor L1 and the cathode of the first diode D1, the anode of the first diode D1 is electrically connected to the first connection end of the first capacitor C1, and the second connection end of the first capacitor C1 is electrically connected to the second connection end of the first inductor L1. The first switch tube Q1 may be a MOSFET, such as a P-channel MOSFET or an N-channel MOSFET.

[0078] When the first switch tube Q1 is turned on, the input voltage Vin1 from the battery 220 charges the first inductor L1, and the first inductor L1 stores energy. When the first switch tube Q1 is turned off, the first inductor L1 releases energy and charges the first capacitor C1, so that the voltage across the first capacitor C1 (i.e., the output voltage Vout1 of the anode boost-buck circuit 1111) can increase or decrease.

[0079] The anode boost-buck circuit 1111 is configured to include a BUCK-BOOST circuit, so that the anode boost-buck circuit 1111 can achieve voltage boost and voltage drop.

[0080] It can be understood that when the anode boost-buck circuit 1111 includes a BUCK-BOOST circuit, the light emitting device 211 can adapt to the low voltage of the battery 220 without modifying the anode drive circuit inside the light emitting device 211 .

[0081] Figure 8 A schematic block diagram of the connection relationship of electronic devices provided in some further embodiments of the present application. Fig. 9 A schematic diagram of the circuit topology of a BUCK circuit provided in some embodiments of the present application.

[0082] In some examples, such as Figure 8 As shown, the anode boost-buck circuit 1111 includes a boost-pass circuit 1113 and an anode buck circuit 1112. The input terminal 1113a of the boost-pass circuit 1113 is electrically connected to the battery 220, the output terminal 1113b of the boost-pass circuit 1113 is electrically connected to the input terminal 1112a of the anode buck circuit 1112, and the output terminal 1112b of the anode buck circuit 1112 is electrically connected to the anode of the light-emitting device 211.

[0083] For example, the boost-pass circuit 1113 may include a BOOST-BYPASS (full name in English: boost circuit-bypass circuit, Chinese name: boost-bypass conversion circuit), so that the boost-pass circuit 1113 can increase the voltage from the battery 220, or the boost-pass circuit 1113 can directly output the voltage from the battery 220. The anode step-down circuit 1112 is used to reduce the received voltage.

[0084] In some examples, the boost-bypass circuit 1113 includes a boost circuit, a bypass circuit, and a control circuit. The boost circuit and the bypass circuit are electrically connected to the control circuit, respectively. The control circuit is used to: control the boost circuit to increase the voltage from the battery 220; or control the bypass circuit to directly output the voltage from the battery 220.

[0085] When the battery 220 has a low charge and the output voltage is small (for example, less than the set voltage), the output voltage of the battery 220 cannot meet the working requirements of the display panel 210. At this time, the boost-pass circuit 1113 can operate in a boost state. The boost circuit increases the voltage from the battery 220 to a value greater than or equal to the set voltage, and then transmits it to the anode step-down circuit 1112.

[0086] The anode buck circuit 1112 receives Vin-ELVDD from the boost-pass circuit 1113, and steps down the received voltage to obtain the anode drive voltage ELVDD, which is then transmitted to the anode of the light-emitting device 211, so that the anode power supply circuit 111 can provide the light-emitting device 211 with an anode drive voltage that meets working requirements when the output voltage of the battery 220 is small.

[0087] On the contrary, when the battery 220 has a high power level and a large output voltage (for example, greater than or equal to the set voltage), the output voltage of the battery 220 can meet the working requirements of the display panel 210. At this time, the boost-pass circuit 1113 can operate in a pass state, and the pass circuit directly transmits the voltage from the battery 220 to the anode buck circuit 1112 to reduce the impact of the boost-pass circuit 1113 on the anode buck circuit 1112.

[0088] In some examples, the set voltage may be the operating voltage of the anode buck circuit 1112. That is, when the output voltage of the battery 220 is less than the operating voltage of the anode buck circuit 1112, the boost-pass circuit operates in a boost state; when the output voltage of the battery 220 is greater than or equal to the operating voltage of the anode buck circuit 1112, the boost-pass circuit operates in a pass state.

[0089] In other examples, the set voltage may also be a specific voltage value, such as 3V, 3.2V or 3.5V, etc. It can be understood that the embodiment of the present application does not further limit the value of the set voltage.

[0090] For example, when the anode boost-buck circuit 1111 includes a boost-pass circuit 1113 and an anode buck circuit 1112 , the light-emitting device 211 can adapt to the low voltage of the battery 220 without modifying the anode drive circuit inside the light-emitting device 211 .

[0091] In some examples, anode buck circuit 1112 includes a BUCK circuit.

[0092] For example, Fig. 9 As shown, the BUCK circuit may include a second inductor L2, a second switch tube Q2, a second diode D2, and a second capacitor C2. The first connection end of the second switch tube Q2 is electrically connected to the output end 1113b of the boost-path circuit 1113, the second connection end of the second switch tube Q2 is electrically connected to the cathode of the second diode D2 and one end of the second inductor L2, the other end of the second inductor L2 is electrically connected to the first connection end of the second capacitor C2, and the second connection end of the second capacitor C2 is electrically connected to the anode of the second diode D2. The second switch tube Q2 may be a MOSFET, such as a P-channel MOSFET or an N-channel MOSFET.

[0093] When the second switch tube Q2 is turned on, the input voltage Vin2 from the boost-path circuit 1113 charges the second inductor L2 and the second capacitor C2, and the second inductor L2 stores energy. When the second switch tube Q2 is turned off, the second inductor L2 releases energy and charges the second capacitor C2, so that the voltage across the second capacitor C2 (i.e., the output voltage Vout2 of the anode buck circuit 1112) can be reduced.

[0094] It can be understood that the anode boost-buck circuit 1111 includes a boost-pass circuit 1113 and an anode buck circuit 1112, so that the anode boost-buck circuit 1111 can achieve boost and buck, thereby enabling the anode boost-buck circuit 1111 to provide the light-emitting device 211 with an anode driving voltage that meets working requirements, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200.

[0095] In some examples, such as Figure 8 As shown, the cathode power supply circuit 112 includes a cathode boost-buck circuit 1121 .

[0096] It can be understood that the input terminal 111a of the cathode boost-buck circuit 1121 is electrically connected to the battery 220, the output terminal 1112b of the cathode boost-buck circuit 1121 is electrically connected to the cathode of the light-emitting device 211, and the cathode boost-buck circuit 1121 is connected in series between the battery 220 and the cathode of the light-emitting device 211. The cathode boost-buck circuit 1121 can not only boost the voltage from the battery 220, but also reduce the voltage from the battery 220.

[0097] When the battery 220 has a low power level and a low output voltage (e.g., less than a set voltage), the cathode boost-buck circuit 111 can increase the voltage from the battery 220 to a level greater than or equal to the set voltage, and transmit it to the cathode of the light-emitting device 211, thereby meeting the working requirements of the light-emitting device 211, so that the light-emitting device 211 can emit light, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200. On the contrary, when the battery 220 has a high power level and a high output voltage (e.g., greater than or equal to the set voltage), the cathode boost-buck circuit 111 can reduce the voltage from the battery 220 to meet the working requirements of the light-emitting device 211.

[0098] That is, the cathode power supply circuit 112 is provided to include a boost-buck circuit 1121. When the battery 220 is low in power and the output voltage is small (for example, less than the set voltage), the cathode power supply circuit 112 can provide the light-emitting device 211 with a cathode driving voltage that meets the working requirements, so that the display panel 210 can operate normally.

[0099] In some examples, cathode boost-buck circuit 1121 includes a BUCK-BOOST circuit.

[0100] The above embodiments of the present application have illustrated the circuit structure of the BUCK-BOOST circuit, which will not be repeated here. The cathode boost-buck circuit 1112 includes a BUCK-BOOST circuit, so that the cathode boost-buck circuit 1112 can achieve boost and buck.

[0101] Fig.10 A schematic block diagram of the connection relationship of electronic devices provided in some further embodiments of the present application. Fig.11 A schematic diagram of the circuit topology of a BOOST circuit provided in some embodiments of the present application.

[0102] In some examples, such as Fig.10 As shown, the input terminal 1121a of the cathode boost-buck circuit 1121 is electrically connected to the output terminal 1113b of the boost-pass circuit 1113, and the output terminal 1121b of the cathode boost-buck circuit 1121 is electrically connected to the cathode of the light-emitting device 211.

[0103] It can be understood that when the input terminal 1121a of the cathode boost-buck circuit 1121 is electrically connected to the output terminal 1113b of the boost-path circuit 1113, the boost-path circuit 1113 and the cathode boost-buck circuit 1121 together constitute the cathode power supply circuit 112.

[0104] In some examples, the cathode boost-buck circuit 1121 and the anode buck circuit 112 are electrically connected to the output terminal 1113b of the same boost-pass circuit 1113. In other examples, the cathode boost-buck circuit 1121 and the anode buck circuit 112 may also be electrically connected to the output terminals 1113b of different boost-pass circuits 1113, respectively.

[0105] When the battery 220 has a low charge and the output voltage is small (for example, less than the set voltage), the output voltage of the battery 220 cannot meet the working requirements of the display panel 210. At this time, the boost-path circuit 1113 can operate in a boost state. The boost-path circuit 1113 increases the voltage from the battery 220 to a value greater than or equal to the set voltage, and then transmits it to the cathode boost-buck circuit 1121.

[0106] The cathode boost-buck circuit 1121 receives Vin-ELVSS from the boost-pass circuit 1113, and boosts or bucks the received voltage to obtain a cathode drive voltage ELVSS, which is then transmitted to the cathode of the light-emitting device 211, so that the cathode power supply circuit 111 can provide the light-emitting device 211 with a cathode drive voltage that meets working requirements when the output voltage of the battery 220 is small.

[0107] On the contrary, when the battery 220 has a high power level and the output voltage is large (for example, greater than or equal to the set voltage), the output voltage of the battery 220 can meet the working requirements of the display panel 210. At this time, the boost-path circuit 1113 can operate in the path state, and the boost-path circuit 1113 directly transmits the voltage from the battery 220 to the cathode boost-buck circuit 1121 to reduce the impact of the boost-path circuit 1113 on the cathode boost-buck circuit 1121.

[0108] The input terminal 1121a of the cathode boost-buck circuit 1121 is electrically connected to the output terminal 1113b of the boost-pass circuit 1113, and the output terminal 1121b of the cathode boost-buck circuit 1121 is electrically connected to the cathode of the light-emitting device 211, so that the cathode boost-buck circuit 1121 can provide the light-emitting device 211 with a cathode driving voltage that meets working requirements, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200.

[0109] For example, when the input terminal 1121a of the cathode boost-buck circuit 1121 is electrically connected to the output terminal 1113b of the boost-pass circuit 1113, the light-emitting device 211 can adapt to the low voltage of the battery 220 without modifying the cathode drive circuit inside the light-emitting device 211.

[0110] In some examples, such as Fig.10 As shown, the driving circuit 113 includes a driving boost circuit 1131 .

[0111] It can be understood that the input terminal 1131a of the driving boost circuit 1131 is electrically connected to the battery 220, the output terminal 1131b of the driving boost circuit 1131 is electrically connected to the driving chip 212, and the driving boost circuit 1131 is connected in series between the battery 220 and the driving chip 212. The driving boost circuit 1131 can increase the voltage from the battery 220.

[0112] When the battery 220 is low in power and the output voltage is small (for example, less than the set voltage), the driving boost circuit 1131 can increase the voltage from the battery 220 to a level greater than or equal to the set voltage, and transmit it to the driving chip 212, thereby meeting the working requirements of the driving chip 212, so that the driving chip 212 can drive the light-emitting device 211 to emit light, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200.

[0113] That is, the driving circuit 113 is set to include a driving boost circuit 1131. When the battery 220 has a low power level and the output voltage is small (for example, less than the set voltage), the driving boost circuit 1131 can provide the driving chip 212 with an anode driving voltage that meets the working requirements, so that the display panel 210 can work normally.

[0114] In some examples, the driving boost circuit 1131 includes a BOOST circuit.

[0115] For example, Fig.11 As shown, the BOOST circuit may include a third inductor L3, a third switch tube Q3, a third diode D3 and a third capacitor C3. One end of the third inductor L3 is electrically connected to the battery 220, the other end of the third inductor L3 is electrically connected to the first connection end of the third switch tube Q3 and the anode of the third diode D3, the cathode of the third diode D3 is electrically connected to the first connection end of the third capacitor C1, and the second connection end of the third capacitor C1 is electrically connected to the second connection end of the third switch tube Q1. The third switch tube Q1 may be a MOSFET, such as a P-channel MOSFET or an N-channel MOSFET.

[0116] When the third switch tube Q3 is turned on, the input voltage Vin1 from the battery 220 charges the third inductor L3, and the third inductor L3 stores energy. When the third switch tube Q3 is turned off, the third inductor L3 releases energy and charges the third capacitor C3, so that the voltage across the third capacitor C1 (i.e., the output voltage Vout1 of the driving boost circuit 1131) can be increased.

[0117] Fig.12 A schematic block diagram of the connection relationship of electronic devices provided in some further embodiments of the present application.

[0118] In some examples, such as Fig.12 As shown, the input terminal 1131 a of the driving boost circuit 1131 is electrically connected to the output terminal 1131 b of the boost-pass circuit 1113 , and the output terminal 1131 b of the driving boost circuit 1131 is electrically connected to the driving chip 212 .

[0119] It can be understood that when the input terminal 1131a of the driving boost circuit 1131 is electrically connected to the output terminal 1113b of the boost-pass circuit 1113, the boost-pass circuit 1113 and the driving boost circuit 1131 together constitute the driving power supply circuit 113.

[0120] In some examples, the driving boost circuit 1131, the cathode boost-buck circuit 1121, and the anode buck circuit 1112 are electrically connected to the output terminal 1113b of the same boost-pass circuit 1113. In other examples, the driving boost circuit 1131, the cathode boost-buck circuit 1121, and the anode buck circuit 1112 may also be electrically connected to the output terminals 1113b of different boost-pass circuits 1113, respectively.

[0121] When the battery 220 has a low power level and the output voltage is small (for example, less than the set voltage), the output voltage of the battery 220 cannot meet the working requirements of the display panel 210. At this time, the boost-path circuit 1113 can operate in a boost state. The boost-path circuit 1113 increases the voltage from the battery 220 to a level greater than or equal to the set voltage, and then transmits it to the driving boost circuit 1131.

[0122] The driving boost circuit 1131 receives Vin-AVDD from the boost-pass circuit 1113, and boosts the received voltage to obtain the driving chip operating voltage AVDD, which is then transmitted to the driving chip 212, so that the driving power supply circuit 113 can provide the driving chip 212 with a driving voltage that meets the working requirements when the output voltage of the battery 220 is small.

[0123] On the contrary, when the battery 220 has a high power level and the output voltage is large (for example, greater than or equal to the set voltage), the output voltage of the battery 220 can meet the working requirements of the display panel 210. At this time, the boost-path circuit 1113 can operate in the path state, and the boost-path circuit 1113 directly transmits the voltage from the battery 220 to the driving boost circuit 1131 to reduce the impact of the boost-path circuit 1113 on the driving boost circuit 1131.

[0124] The input terminal 1131a of the driving boost circuit 1131 is electrically connected to the output terminal 1113b of the boost-pass circuit 1113, and the output terminal 1131b of the driving boost circuit 1131 is electrically connected to the cathode of the light-emitting device 211, so that the driving boost circuit 1131 can provide the driving chip 212 with a voltage that meets the working requirements, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200.

[0125] For example, when the input terminal 1131a of the driving boost circuit 1131 is electrically connected to the output terminal 1113b of the boost-pass circuit 1113, the driving chip 212 can adapt to the low voltage of the battery 220 without modifying the cathode driving circuit inside the driving chip 212.

[0126] Fig.13 A schematic block diagram of the connection relationship of electronic devices provided in some further embodiments of the present application.

[0127] As can be seen from the above, taking the display panel 210 as LTPO2.0 as an example, in some examples, the anode power supply circuit 111 includes an anode boost-buck circuit 1112. In other examples, taking the display panel 210 as LTPS or LTPO1.0 as an example, Fig.13 As shown, the anode power supply circuit 111 includes a boost-pass circuit 1113 and an anode boost circuit 1114. The input terminal 1113a of the boost-pass circuit 1113 is electrically connected to the battery 220, the output terminal 1113b of the boost-pass circuit 1113 is electrically connected to the input terminal 1114a of the anode boost circuit 1114, and the output terminal 1114b of the anode boost circuit 1114 is electrically connected to the anode of the light-emitting device 211.

[0128] It can be understood that the anode boost circuit 1114 can increase the voltage from the boost-pass circuit 1113. When the battery 220 has a low power level and the output voltage is small (for example, less than the set voltage), the output voltage of the battery 220 cannot meet the working requirements of the display panel 210. At this time, the boost-pass circuit 1113 can work in a boost state, and the boost-pass circuit 1113 increases the voltage from the battery 220 to a level greater than or equal to the set voltage, and then transmits it to the anode boost circuit 1114.

[0129] The anode boost circuit 1114 receives Vin-ELVDD from the boost-pass circuit 1113, and boosts the received voltage to obtain the anode drive voltage ELVDD, which is then transmitted to the anode of the light-emitting device 211, so that the anode power supply circuit 111 can provide the light-emitting device 211 with an anode drive voltage that meets working requirements when the output voltage of the battery 220 is small.

[0130] On the contrary, when the battery 220 has a high power level and a large output voltage (for example, greater than or equal to the set voltage), the output voltage of the battery 220 can meet the working requirements of the display panel 210. At this time, the boost-path circuit 1113 can operate in a path state, and the boost-path circuit 1113 directly transmits the voltage from the battery 220 to the anode boost circuit 1114 to reduce the impact of the boost-path circuit 1113 on the anode boost circuit 1114.

[0131] The anode power supply circuit 111 includes a boost-path circuit 1113 and an anode boost circuit 1114. The boost-path circuit 1113 and the anode boost circuit 1114 are connected in series between the battery 220 and the anode of the light-emitting device 221. In this way, when the battery 220 is low in power and the output voltage is small (for example, less than the set voltage), the boost-path circuit 1113 and the anode boost circuit 1114 can increase the voltage from the battery 220 to a voltage greater than or equal to the set voltage, and transmit it to the anode of the light-emitting device 211, so as to meet the working requirements of the light-emitting device 211, so that the light-emitting device 211 can emit light, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200.

[0132] On the contrary, when the battery 220 has a high charge and a large output voltage (for example, greater than or equal to the set voltage), the boost-pass circuit 1113 can directly transmit the voltage from the battery 220 to the anode boost circuit 1114, so that the anode boost circuit 1114 can provide the light-emitting device 211 with a voltage that meets the working requirements, thereby enabling the light-emitting device 211 to emit light.

[0133] In some examples, anode boost circuit 1114 includes a BOOST circuit.

[0134] In some examples, such as Fig.13 As shown, the output terminal 1113 b of the boost-pass circuit 1113 can also be electrically connected to the input terminal 1121 a of the cathode boost-buck circuit 1121 and the input terminal 1131 a of the driving boost circuit 1131 .

[0135] In summary, the embodiments of the present application have at least the following beneficial effects:

[0136] It can be understood that the input terminal 111a of the anode boost-buck circuit 1111 is electrically connected to the battery 220, the output terminal 1111b of the anode boost-buck circuit 1111 is electrically connected to the anode of the light-emitting device 211, and the anode boost-buck circuit 1111 is connected in series between the battery 220 and the anode of the light-emitting device 211. The anode boost-buck circuit 1111 can not only increase the voltage from the battery 220, but also decrease the voltage from the battery 220.

[0137] When the battery 220 has a low power level and a low output voltage (e.g., less than a set voltage), the anode boost-buck circuit 111 can increase the voltage from the battery 220 to a level greater than or equal to the set voltage, and transmit it to the anode of the light-emitting device 211, so as to meet the working requirements of the light-emitting device 211, so that the light-emitting device 211 can emit light, thereby extending the standby time of the electronic device 200 and improving the performance of the electronic device 200. On the contrary, when the battery 220 has a high power level and a high output voltage (e.g., greater than or equal to a set voltage), the anode boost-buck circuit 111 can reduce the voltage from the battery 220 to meet the working requirements of the light-emitting device 211.

[0138] That is, the anode power supply circuit 111 includes a boost-buck circuit 1111. When the battery 220 is low in power and the output voltage is small (for example, less than the set voltage), the anode power supply circuit 111 can provide the light-emitting device 211 with an anode driving voltage that meets working requirements, so that the display panel 210 can work normally.

[0139] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that a person skilled in the art can think of within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A power supply circuit, characterized in that: Used in electronic equipment; the electronic equipment comprises a display panel and a battery; The display panel includes a light emitting device; the battery supplies power to the light emitting device through the power supply circuit; the power supply circuit includes: an anode power supply circuit, wherein an input end of the anode power supply circuit is electrically connected to the battery, and an output end of the anode power supply circuit is electrically connected to the anode of the light-emitting device; a cathode power supply circuit, wherein an input end of the cathode power supply circuit is electrically connected to the battery, and an output end of the cathode power supply circuit is electrically connected to the cathode of the light emitting device; Wherein, the anode power supply circuit includes an anode boost-buck circuit.

2. The power supply circuit according to claim 1, characterized in that: The anode boost-buck circuit includes a BUCK-BOOST circuit.

3. The power supply circuit according to claim 1, characterized in that: The anode boost-buck circuit includes a boost-path circuit and an anode buck circuit; the input end of the boost-path circuit is electrically connected to the battery, the output end of the boost-path circuit is electrically connected to the input end of the anode buck circuit, and the output end of the anode buck circuit is electrically connected to the anode of the light-emitting device.

4. The power supply circuit according to claim 3, characterized in that: The cathode power supply circuit includes a cathode boost-buck circuit.

5. The power supply circuit according to claim 4, characterized in that: The cathode boost-buck circuit includes a BUCK-BOOST circuit.

6. The power supply circuit according to claim 4 or 5, characterized in that: The input end of the cathode boost-buck circuit is electrically connected to the output end of the boost-pass circuit, and the output end of the cathode boost-buck circuit is electrically connected to the cathode of the light emitting device.

7. The power supply circuit according to claim 3, characterized in that: The display panel further comprises a driving chip, the driving chip is electrically connected to the light emitting device, and the driving chip is used to drive the light emitting device to emit light; The power supply circuit also includes: A driving power supply circuit, wherein an input end of the driving power supply circuit is electrically connected to the battery, and an output end of the driving power supply circuit is electrically connected to the driving chip; The driving power supply circuit includes a driving boost circuit.

8. The power supply circuit according to claim 7, characterized in that: The input end of the driving boost circuit is electrically connected to the output end of the boost-pass circuit, and the output end of the driving boost circuit is electrically connected to the driving chip.

9. A power supply circuit, characterized in that: Used in electronic equipment; the electronic equipment comprises a display panel and a battery; The display panel includes a light emitting device; the battery supplies power to the light emitting device through the power supply circuit; the power supply circuit includes: an anode power supply circuit, wherein an input end of the anode power supply circuit is electrically connected to the battery, and an output end of the anode power supply circuit is electrically connected to the anode of the light-emitting device; a cathode power supply circuit, wherein an input end of the cathode power supply circuit is electrically connected to the battery, and an output end of the cathode power supply circuit is electrically connected to the cathode of the light emitting device; Wherein, the anode power supply circuit includes a boost-path circuit and an anode boost circuit; the input end of the boost-path circuit is electrically connected to the battery, the output end of the boost-path circuit is electrically connected to the input end of the anode boost circuit, and the output end of the anode boost circuit is electrically connected to the anode of the light-emitting device.

10. A power supply device, characterized in that: include: shell; The power supply circuit according to any one of claims 1 to 9; The power supply circuit is located in the housing.

11. An electronic device, characterized in that: include: A display panel, the display panel comprising a light emitting device; Battery; as well as, The power supply circuit according to any one of claims 1 to 9; The battery supplies power to the light emitting device through the power supply circuit.

12. The electronic device according to claim 11, characterized in that: The battery is a silicon negative electrode battery.

13. The electronic device according to claim 11 or 12, characterized in that: The minimum operating voltage of the battery is less than 3.2V.

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