CN210669622U - Portable display device and power supply circuit thereof - Google Patents
Portable display device and power supply circuit thereof Download PDFInfo
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- CN210669622U CN210669622U CN201921614953.1U CN201921614953U CN210669622U CN 210669622 U CN210669622 U CN 210669622U CN 201921614953 U CN201921614953 U CN 201921614953U CN 210669622 U CN210669622 U CN 210669622U
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Abstract
The utility model discloses a portable display device and power supply circuit thereof, portable display device power supply circuit includes: the control chip and the power management module; the control chip and the power management module are connected with an external power supply through an external connecting wire so as to charge the control chip and the power management module through the external power supply; the power management module is further used for monitoring the connection state of the external connecting line and supplying power to the control chip when the external connecting line is disconnected. The utility model discloses in the use, can use under the condition that does not have the external power supply continuously. And the power supply management module directly supplies power to the control chip, so that the electric energy conversion efficiency can be improved, and the endurance time of the portable display equipment is prolonged.
Description
Technical Field
The utility model relates to a circuit electron field especially relates to portable display device and supply circuit thereof.
Background
The existing common display is generally placed at a fixed position for use due to the problems of inconvenient movement, large volume, limited length of a power supply wire and the like. In various use scenes in which the display needs to be frequently moved, a portable display device is required, and the portable display device has the advantages of being moderate in size, light and thin, easy to carry, capable of supporting charging of a USB interface and the like, and can also support screen expansion display of a part of mobile phones.
The existing portable display device can be generally connected with an intelligent device such as a notebook computer or a mobile device through a connecting line, and the connecting line is used for transmitting signals and supplying power to the portable display device. However, since the power consumption of the control chip of the portable display device is high and the battery power of the existing smart device is low, the battery power of the smart device will be consumed rapidly when the portable display device is powered by the smart device.
SUMMERY OF THE UTILITY MODEL
A primary object of the utility model is to provide a portable display device and supply circuit thereof aims at solving the smart machine and supplies power fast problem for portable display device.
In order to achieve the above object, the present invention provides a power supply circuit for portable display device, including:
the first input end of the control chip is connected with an external power supply so as to supply power to the control chip through the external power supply;
the input end of the power management module is connected with an external power supply so as to charge the power management module through the external power supply, and the output end of the power management module is connected with the second input end of the control chip;
the first input end of the control chip and the input end of the power management module are connected with an external power supply through the same external connecting wire;
the power management module is further used for monitoring the connection state of the external connection line and directly supplying power to the control chip through the output end of the power management module when the external connection line is disconnected.
Optionally, the power management module includes a charge-discharge module and a monitoring module;
the charging input end of the charging and discharging module is connected with an external power supply through an external connecting wire, and the discharging output end of the charging and discharging module is connected with the second input end of the control chip;
the first monitoring end of the monitoring module is connected with the charging input end of the charging and discharging module so as to monitor the interface voltage of the charging input end of the charging and discharging module, and the first signal output end of the monitoring module is connected with the charging control end of the charging and discharging module;
the monitoring module is further used for sending a connection disconnection signal to the charging control end of the charging and discharging module when the interface voltage of the charging input end of the charging and discharging module is monitored to be a first voltage; when the interface voltage of the charging input end of the charging and discharging module is monitored to be a second voltage, a connection signal is sent to the charging control end of the charging and discharging module;
the charge-discharge module is also used for supplying power to the control chip when receiving the connection disconnection signal; and when the connection signal is received, stopping supplying power and charging through the external power supply.
Optionally, a second monitoring end of the monitoring module is connected with the control chip to monitor a working state of the control chip, and a second signal output end of the monitoring module is connected with a discharge control end of the charge-discharge module;
the monitoring module is further used for sending a working signal to a discharge control end of the charge and discharge module when the control chip is monitored to be in a working state; when the control chip is monitored to be in a closed state, a stop signal is sent to a discharge control end of the charge and discharge module;
the charge-discharge module is also used for supplying power to the control chip when receiving the working signal; and stopping power supply when the stop signal is received.
Optionally, the charge and discharge module includes an energy storage module and a voltage boost and reduction circuit, a first input end of the voltage boost and reduction circuit is connected to the external power supply, a first output end of the voltage boost and reduction circuit is connected to the control chip, an input and output end of the voltage boost and reduction circuit is connected to the energy storage module, a first input end of the voltage boost and reduction circuit is a charge input end of the charge and discharge module, and a first output end of the voltage boost and reduction circuit is a discharge output end of the charge and discharge module;
the voltage boosting and reducing circuit is used for reducing the power supply voltage output by the external power supply when an external connecting wire is connected so as to charge the energy storage module; and when the external connecting line is disconnected, the power supply voltage output by the energy storage module is boosted so as to supply power to the control chip.
Optionally, the step-up and step-down circuit includes a first switch tube, a second switch tube, a first inductor, a first diode, and a second diode;
the first end of the first switch tube is connected with the anode of the external power supply and the first power supply end of the control chip respectively, the second end of the first switch tube is connected with the first end of the first inductor, the second end of the first inductor is connected with the anode of the energy storage module, the cathode of the energy storage module is connected with the cathode of the external power supply and the second power supply end of the control chip respectively, the cathode of the energy storage module is also connected with the first end of the second switch tube, and the second end of the second switch tube is connected with the first end of the first inductor;
the anode of the first diode is connected with the second end of the first switch tube, and the cathode of the first diode is connected with the first end of the first switch tube; the anode of the second diode is connected with the first end of the second switch tube, and the cathode of the second diode is connected with the second end of the second switch tube.
Optionally, the first switching tube and the second switching tube are both insulated gate field effect transistors.
Optionally, the charge and discharge module further comprises an energy release module, the energy release module comprises an energy release resistor and an energy release switch which are connected in series, a first end of the energy release module is connected with the anode of the energy storage module, and a second end of the energy release module is connected with the cathode of the energy storage module.
Optionally, the control chip further includes a plurality of data interfaces.
In addition, in order to achieve the above object, the present invention also provides a portable display device, which includes a portable display device power supply circuit configured as the portable display device power supply circuit described above.
The utility model discloses a set up power management module, charge for power management module when external power supplies power for control chip to continue to supply power for control chip through power management module when external power supplies can't supply power for control chip, so that control chip also can normal operating when not having the external power supply. In use, the smart device need only provide a display signal to the portable display device and need not provide power to the portable display device. And directly supply power for control chip through power management module, compare in smart machine and turn into portable display device power supply with self battery power and have higher electric energy conversion efficiency to portable display device's time of endurance has been improved effectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a power supply circuit of a portable display device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a charge-discharge module in the embodiment of fig. 1;
fig. 3 is a schematic circuit diagram of the step-up/step-down circuit in the embodiment of fig. 2.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | External power supply | K2 | |
| 20 | Power supply management module | L1 | |
| 21 | Charging-discharging module | D1 | |
| 211 | Energy storage module | D2 | |
| 212 | Voltage boosting and reducing |
22 | Monitoring module |
| K1 | |
30 | Control chip |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a portable display device supply circuit is applied to portable display device, and this portable display device can be portable display, folding display and wireless display etc..
Referring to fig. 1, in an embodiment, the power supply circuit of the portable display device includes a control chip 30 and a power management module 20, wherein a first input terminal of the control chip 30 is connected to an external power source 10 to supply power to the control chip 30 through the external power source 10. The input terminal of the power management module 20 is also connected to the external power source 10 to charge the power management module 20 while supplying power to the control chip 30 through the external power source 10, and the output terminal of the power management module 20 is connected to the second input terminal of the control chip 30. The first input terminal of the control chip 30 and the input terminal of the power management module 20 are connected to the external power supply 10 through the same external connection line. That is, the portable display device simultaneously supplies power to the control chip 30 and charges the power management module 20 through an external connection line. The power management module 20 also monitors the connection state of the external connection line, and when the power management module 20 monitors that the external connection line is disconnected, it may be determined that the external power supply 10 cannot supply power to the control chip 30 at this time, and the power management module 20 may replace the external power supply 10 to supply power to the control chip 30.
The power supply circuit of the portable display device provided by the embodiment is specifically arranged in the portable display device, and the portable display device can be connected with an intelligent terminal and used as an external display to display corresponding page contents. When the portable display device is connected to the external power supply 10 through the external connection line, the external power supply 10 supplies power to the control chip 30, so that the control chip 30 operates normally and displays a corresponding page, and the external power supply 10 can also charge the power management module 20 through the external connection line. When the power management module 20 monitors that the external connection line is disconnected, the power management module 20 may supply power to the control chip 30, so that the power management module 20 continues to supply power to the control chip 30 when the external connection line is disconnected and the external power source 10 cannot supply power to the control chip 30.
In the embodiment, by providing the power management module 20, the external power source 10 charges the power management module 20 while supplying power to the control chip 30, and when the external power source 10 cannot supply power to the control chip 30, the power management module 20 continues to supply power to the control chip 30, so that the control chip 30 can normally operate even when the external power source 10 does not supply power. During use, even if the external power supply 10 is not connected to the portable display device for supplying power, the control chip 30 can be supplied with power through the built-in power management module 20 to ensure that the portable display device can be continuously used. And the power management module 20 directly supplies power to the control chip 30, so that compared with the intelligent device which converts the electric quantity of the battery of the intelligent device into the power supply of the portable display device, the power conversion efficiency is higher, and the endurance time of the portable display device is effectively prolonged.
Further, the power management module 20 may include a charging/discharging module 21 and a monitoring module 22, a charging input end of the charging/discharging module 21 is connected to the external power source 10 through an external connection line, and a discharging output end of the charging/discharging module 21 is connected to a second input end of the control chip 30. The first monitoring end of the monitoring module 22 is connected to the charging input end of the charging and discharging module 21, the monitoring module 22 can monitor the interface voltage of the charging input end of the charging and discharging module 21 through the first monitoring end, and the first signal output end of the monitoring module 22 is connected to the charging control end of the charging and discharging module 21. When monitoring that the interface voltage at the charging input terminal of the charging and discharging module 21 is the first voltage, the monitoring module 22 may send a connection disconnection signal to the charging control terminal of the charging and discharging module 21; when the interface voltage of the charging input terminal of the charging and discharging module 21 is monitored to be the second voltage, a connection signal may be sent to the charging control terminal of the charging and discharging module 21. It should be noted that, when the external connection line is disconnected, the interface voltage of the charging input terminal of the charging and discharging module 21 is a first voltage; when the external power source 10 is connected to the charge-discharge module 21 through the external connection line, the interface voltage at the charge input terminal of the charge-discharge module 21 is a second voltage. The connection state of the external connecting wire can be determined by monitoring the interface voltage. After receiving the connection disconnection signal sent by the monitoring module 22, the charge-discharge module 21 may determine that the external power source 10 cannot supply power to the control chip 30, and at this time, the charge-discharge module 21 may continue to supply power to the control chip 30 through the electric energy stored in the charge-discharge module 21; after the charging and discharging module 21 receives the connection signal sent by the monitoring module 22, it may be determined that the external power source 10 is connected to the portable display device through the external connection line, at this time, the external power source 10 may directly supply power to the control chip 30, and the charging and discharging module 21 may stop supplying power and perform charging through the external power source 10 to continue to store electric energy. Whether the external connection line is connected to the external power source 10 is monitored by the monitoring module 22, and power can be continuously supplied to the control chip 30 through the charge-discharge module 21 when the connection is disconnected, so that the control chip 30 can still continuously operate when no power is supplied to the external power source 10. When the external connection line is reconnected to the external power source 10, the monitoring module 22 can also perform monitoring to control the charge-discharge module 21 to stop supplying power to the control chip 30 and charge the external power source 10 in time, so as to store electric energy when the external power source 10 supplies power normally.
Further, in the above embodiment, the monitoring module 22 may further include a second monitoring end, the second monitoring end of the monitoring module 22 is connected to the control chip 30, and the monitoring module 22 may monitor the operating state of the control chip 30 through the second monitoring end, that is, determine whether the control chip 30 is in the operating state. The second signal output end of the monitoring module 22 is connected to the discharge control end of the charge-discharge module 21. When monitoring that the control chip 30 is in a working state, the monitoring module 22 sends a working signal to a discharge control end of the charge-discharge module 21; when the control chip 30 is monitored to be in the off state, a stop signal is sent to the discharge control end of the charge-discharge module 21. If the charge-discharge module 21 receives the working signal sent by the monitoring module 22, it is determined that the control chip 30 is in a working state, and power can be supplied to the control chip 30; if the charge-discharge module 21 receives the stop signal, it determines that the control chip 30 is in the off state, and may stop supplying power to the control chip 30, so as to avoid power consumption and reduce power consumption of the portable display device.
It should be noted that, the monitoring module 22 monitors the operating state of the control chip 30, and the condition that the monitoring module 22 monitors disconnection through the first monitoring terminal is required, that is, the operating state of the control chip 30 needs to be monitored only when the external power supply 10 fails to supply power to the control chip 30. The monitoring module 22 may not need to monitor the operating state of the control chip 30 when the external power source 10 can directly supply power.
Further, referring to fig. 1, 2 and 3, the charge-discharge module 2121 may include an energy storage module 211 and a step-up/step-down circuit 212, wherein a first input end of the step-up/step-down circuit 212 is connected to the external power source 10, a first output end of the step-up/step-down circuit 212 is connected to the control chip 30, and an input end and an output end of the step-up/step-down circuit 212 are connected to the energy storage module 211. A first input end of the step-up/step-down circuit 212 is a charging input end of the charge-discharge module 21, and a first output end of the step-up/step-down circuit 212 is a discharging output end of the charge-discharge module 21. When the external connection line is connected, the external power supply 10 directly supplies power to the control chip 30, and at this time, the step-up and step-down circuit 212 receives the power supply voltage output by the external power supply 10 through the first input end, and charges the energy storage module 211 after the step-up and step-down circuit 212 performs step-down; when the external connection line is disconnected, the external power supply 10 stops supplying power, the energy storage module 211 can output power voltage at this time, and the voltage boosting and reducing circuit 212 can boost the power voltage and then output the power voltage to the control chip 30 through the first output end to supply power. By providing the step-up/step-down circuit 212, the energy storage module 211 can be charged by the power supply voltage when the external power supply 10 supplies power, and can boost the power supply voltage to supply power to the control chip 30 when the external power supply 10 does not supply power. The convenient charging and discharging operation of the energy storage module 211 is realized.
Further, as shown in fig. 3, the step-up/down circuit 212 includes a first switch, a second switch transistor K2, a first inductor L1, a first diode D1, and a second diode D2. The first end of the first switch tube K1 is connected with the positive pole of the external power supply 10 and the first power supply end of the control chip 30, the second end of the first switch tube K1 is connected with the first end of the first inductor L1, the second end of the first inductor L1 is connected with the positive pole of the energy storage module 211, the negative pole of the energy storage module 211 is connected with the negative pole of the external power supply 10 and the second power supply end of the control chip 30, the negative pole of the energy storage module 211 is further connected with the first end of the second switch tube K2, and the second end of the second switch tube K2 is connected with the first end of the first inductor L1. The anode of the first diode D1 is connected to the second end of the first switch tube K1, and the cathode of the first diode D1 is connected to the first end of the first switch tube K1; the anode of the second diode D2 is connected to the first end of the second switch tube K2, and the cathode of the second diode D2 is connected to the second end of the second switch tube K2.
When the external power source 10 supplies power, the second switching tube K2 is in an off state, the first switching tube K1, the second diode D2 and the first inductor L1 form a step-down circuit, and the step-down circuit steps down the power supply voltage of the external power source 10 and charges the energy storage module 211; when the external power source 10 is not supplying power, the first switch tube K1 is turned off, and the second switch tube K2, the first diode D1 and the first inductor L1 form a voltage boosting circuit to boost the power voltage output by the energy storage module 211 and charge the control chip 30. Through the bidirectional conversion voltage boosting and reducing circuit 212, the power supply voltage output by the external power supply 10 can be reduced and then input into the energy storage module 211 for charging, and the power supply voltage output by the energy storage module 211 can also be boosted and then supplied to the control chip 30, so that the charging and discharging switching operation of the energy storage module 211 is realized.
It is understood that the first switch transistor K1 and the second switch transistor K2 may be insulated gate field effect transistors. The first signal output terminal of the monitoring module 22 may be connected to the controlled terminal of the first switch tube K1 through a PWM generator (not shown), and the PWM generator may send a pulse signal to the controlled terminal of the first switch tube K1 after receiving the connection signal to control the on/off of the first switch tube K1, so as to implement the voltage reduction function of the voltage step-up and step-down circuit 212.
The charge-discharge module 21 may further include a leakage module (not shown), the leakage module may include a leakage circuit (not shown) and a leakage switch (not shown) connected in series, a first end of the leakage module is connected to the positive electrode of the energy storage module 211, and a second end of the leakage module is connected to the negative electrode of the energy storage module 211. The energy releasing module is used for releasing the electric energy stored in the energy storage module 211 when the energy storage module 211 stops charging and does not work for a long time, so as to prolong the service life of the energy storage module 211. The energy leakage module can also enable the energy leakage module to release charges accumulated on the energy storage module 211, so that the energy storage module 211 is prevented from being damaged or broken down due to accumulation of static charges on the energy storage module 211 for a long time, and equipment maintenance and equipment safety protection are facilitated.
In the above embodiment, the control chip of the power supply circuit of the portable display device may further be provided with a plurality of data interfaces, specifically, a plurality of Type-C interfaces, HDMI interfaces, or VGA interfaces. Other intelligent devices can be connected with the convenient display device through the data interface and send corresponding data to the control chip, so that the portable display device can display corresponding content.
The utility model provides a portable display device, this portable display device include portable display device supply circuit, and above-mentioned embodiment can be referred to this portable display device supply circuit's structure, no longer gives unnecessary details here. It should be noted that, since the portable display device of the present embodiment adopts the technical solution of the power supply circuit for the portable display device, the portable display device has all the advantages of the power supply circuit for the portable display device.
The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (9)
1. A portable display device power supply circuit, comprising:
the first input end of the control chip is connected with an external power supply so as to supply power to the control chip through the external power supply;
the input end of the power management module is connected with an external power supply so as to charge the power management module through the external power supply, and the output end of the power management module is connected with the second input end of the control chip;
the first input end of the control chip and the input end of the power management module are connected with an external power supply through the same external connecting wire;
the power management module is further used for monitoring the connection state of the external connection line and directly supplying power to the control chip through the output end of the power management module when the external connection line is disconnected.
2. The power supply circuit of claim 1, wherein the power management module comprises a charge-discharge module and a monitoring module;
the charging input end of the charging and discharging module is connected with an external power supply through an external connecting wire, and the discharging output end of the charging and discharging module is connected with the second input end of the control chip;
the first monitoring end of the monitoring module is connected with the charging input end of the charging and discharging module so as to monitor the interface voltage of the charging input end of the charging and discharging module, and the first signal output end of the monitoring module is connected with the charging control end of the charging and discharging module;
the monitoring module is further used for sending a connection disconnection signal to the charging control end of the charging and discharging module when the interface voltage of the charging input end of the charging and discharging module is monitored to be a first voltage; when the interface voltage of the charging input end of the charging and discharging module is monitored to be a second voltage, a connection signal is sent to the charging control end of the charging and discharging module;
the charge-discharge module is also used for supplying power to the control chip when receiving the connection disconnection signal; and when the connection signal is received, stopping supplying power and charging through the external power supply.
3. The power supply circuit of claim 2, wherein a second monitoring terminal of the monitoring module is connected to the control chip for monitoring the operating state of the control chip, and a second signal output terminal of the monitoring module is connected to a discharge control terminal of the charge-discharge module;
the monitoring module is further used for sending a working signal to a discharge control end of the charge and discharge module when the control chip is monitored to be in a working state; when the control chip is monitored to be in a closed state, a stop signal is sent to a discharge control end of the charge and discharge module;
the charge-discharge module is also used for supplying power to the control chip when receiving the working signal; and stopping power supply when the stop signal is received.
4. The power supply circuit of claim 3, wherein the charge-discharge module comprises an energy storage module and a voltage boost and reduction circuit, a first input end of the voltage boost and reduction circuit is connected with the external power supply, a first output end of the voltage boost and reduction circuit is connected with the control chip, an input end and an output end of the voltage boost and reduction circuit are connected with the energy storage module, a first input end of the voltage boost and reduction circuit is a charge input end of the charge-discharge module, and a first output end of the voltage boost and reduction circuit is a discharge output end of the charge-discharge module;
the voltage boosting and reducing circuit is used for reducing the power supply voltage output by the external power supply when an external connecting wire is connected so as to charge the energy storage module; and when the external connecting line is disconnected, the power supply voltage output by the energy storage module is boosted so as to supply power to the control chip.
5. The portable display device power supply circuit of claim 4, wherein the step-up/step-down circuit comprises a first switch transistor, a second switch transistor, a first inductor, a first diode, and a second diode;
the first end of the first switch tube is connected with the anode of the external power supply and the first power supply end of the control chip respectively, the second end of the first switch tube is connected with the first end of the first inductor, the second end of the first inductor is connected with the anode of the energy storage module, the cathode of the energy storage module is connected with the cathode of the external power supply and the second power supply end of the control chip respectively, the cathode of the energy storage module is also connected with the first end of the second switch tube, and the second end of the second switch tube is connected with the first end of the first inductor;
the anode of the first diode is connected with the second end of the first switch tube, and the cathode of the first diode is connected with the first end of the first switch tube; the anode of the second diode is connected with the first end of the second switch tube, and the cathode of the second diode is connected with the second end of the second switch tube.
6. The power supply circuit for a portable display device of claim 5 wherein said first switching transistor and said second switching transistor are insulated gate field effect transistors.
7. The power supply circuit of any one of claims 4-6, wherein the charge-discharge module further comprises a power-draining module, the power-draining module comprises a power-draining resistor and a power-draining switch connected in series, a first end of the power-draining module is connected to the positive electrode of the energy-storing module, and a second end of the power-draining module is connected to the negative electrode of the energy-storing module.
8. The portable display device power supply circuit of any one of claims 1-6, wherein the control chip further comprises a plurality of data interfaces.
9. A portable display device, characterized in that the portable display device comprises a portable display device power supply circuit configured as a portable display device power supply circuit as claimed in any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921614953.1U CN210669622U (en) | 2019-09-25 | 2019-09-25 | Portable display device and power supply circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921614953.1U CN210669622U (en) | 2019-09-25 | 2019-09-25 | Portable display device and power supply circuit thereof |
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| CN210669622U true CN210669622U (en) | 2020-06-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036900A (en) * | 2021-03-16 | 2021-06-25 | 维沃移动通信有限公司 | Display screen power supply circuit and electronic equipment |
| CN116054337A (en) * | 2023-01-13 | 2023-05-02 | 中国铁塔股份有限公司 | Power supply device and method |
-
2019
- 2019-09-25 CN CN201921614953.1U patent/CN210669622U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036900A (en) * | 2021-03-16 | 2021-06-25 | 维沃移动通信有限公司 | Display screen power supply circuit and electronic equipment |
| CN116054337A (en) * | 2023-01-13 | 2023-05-02 | 中国铁塔股份有限公司 | Power supply device and method |
| CN116054337B (en) * | 2023-01-13 | 2024-01-30 | 铁塔能源有限公司 | Power supply device and method |
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