CN216056362U

CN216056362U - Power supply device and display apparatus

Info

Publication number: CN216056362U
Application number: CN202121203660.1U
Authority: CN
Inventors: 左鸿阳
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-03-15
Anticipated expiration: 2031-05-31

Abstract

The embodiment of the application relates to a power supply device and a display device, wherein the power supply device comprises: a battery for providing a supply voltage signal; the DCDC converter is connected with the battery and used for receiving the power supply voltage signal and boosting the power supply voltage signal to generate a first voltage signal; the voltage stabilizer is configured with an enabling control end for receiving an enabling control signal and a signal input end for receiving a first voltage signal, the signal input end is connected with the DCDC converter, and the voltage stabilizer is used for receiving the first voltage signal, filtering alternating current ripples in the first voltage signal in response to the enabling control signal and carrying out voltage reduction processing on the first voltage signal to generate a first target signal. In this embodiment, by disposing the voltage regulator at the rear end of the DCDC converter, on one hand, the voltage regulator can filter out ripples in the first voltage signal output by the DCDC converter, so as to provide the first target signal with stable voltage.

Description

Power supply device and display apparatus

Technical Field

The embodiment of the application relates to the technical field of power supplies, in particular to a power supply device and a display device.

Background

With the continuous development of electronic devices, more and more functions can be realized by the electronic devices. The power supply device of the electronic equipment is used for supplying power to other devices in the electronic equipment so as to ensure the normal operation of the electronic equipment. Therefore, higher demands are also placed on the power supply device. However, a certain ac ripple exists in the signal output by the conventional power supply device, which greatly affects the operation stability of other devices.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a power supply device and a display device, which can remove ripples in a first target signal output by the power supply device, thereby improving the stability of a first target voltage.

A power supply apparatus comprising:

a battery for providing a supply voltage signal;

the DCDC converter is connected with the battery and used for receiving the power supply voltage signal and boosting the power supply voltage signal to generate a first voltage signal;

the voltage stabilizer is configured with an enabling control end for receiving an enabling control signal and a signal input end for receiving the first voltage signal, the signal input end is connected with the DCDC converter, and the voltage stabilizer is used for receiving the first voltage signal, filtering an alternating current ripple in the first voltage signal in response to the enabling control signal, and performing voltage reduction processing on the first voltage signal to generate a first target signal.

A power supply apparatus comprising:

the battery is used for providing a direct-current power supply voltage signal;

the voltage stabilizer is connected with the battery and used for receiving the power supply voltage signal, filtering alternating current ripples in the power supply voltage signal and performing voltage reduction processing on the power supply voltage signal to generate a second voltage signal;

and the DCDC converter is connected with the voltage stabilizer and used for performing boosting processing on the second voltage signal to generate a first target signal.

A display device, comprising:

a display panel;

according to the power supply device, the power supply device is used for supplying power to the display panel by using the first target voltage.

The above power supply device and display apparatus, the power supply device comprising: a battery for providing a supply voltage signal; the DCDC converter is connected with the battery and used for receiving the power supply voltage signal and boosting the power supply voltage signal to generate a first voltage signal; the voltage stabilizer is configured with an enabling control end for receiving an enabling control signal and a signal input end for receiving the first voltage signal, the signal input end is connected with the DCDC converter, and the voltage stabilizer is used for receiving the first voltage signal, filtering an alternating current ripple in the first voltage signal in response to the enabling control signal, and performing voltage reduction processing on the first voltage signal to generate a first target signal. In this embodiment, by disposing the voltage regulator at the rear end of the DCDC converter, on one hand, the voltage regulator can filter out ripples in the first voltage signal output by the DCDC converter, so as to provide the first target signal with stable voltage. On the other hand, the circuit at the rear end of the voltage stabilizer is relatively few, so that the problem that the voltage stabilizer cannot drive a load can be avoided, the problem that the voltage stabilizer is burnt due to the fact that the load of the voltage stabilizer is too large can be prevented, and the stability and the reliability of the power supply device are greatly improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a block diagram of a power supply apparatus according to an embodiment;

FIG. 2 is a second block diagram of the power supply apparatus according to an embodiment;

FIG. 3 is a third block diagram of a power supply device according to an embodiment;

FIG. 4 is a schematic diagram of an embodiment of a regulator and a discharge circuit;

FIG. 5 is a second schematic diagram of the voltage regulator and the discharge circuit according to an embodiment;

FIG. 6 is a third schematic diagram of the voltage regulator and the discharge circuit according to an embodiment;

FIG. 7 is a timing diagram of input and output signals of the voltage regulator according to one embodiment;

FIG. 8 is an internal circuit diagram of a voltage regulator according to one embodiment;

FIG. 9 is a fourth block diagram of a power supply device according to an embodiment;

FIG. 10 is a fifth block diagram of a power supply device according to an embodiment;

FIG. 11 is a sixth block diagram of a power supply device according to an embodiment;

FIG. 12 is a schematic structural diagram of a display device according to an embodiment;

fig. 13 is a block diagram of a partial structure of a display device of an embodiment.

Detailed Description

To facilitate an understanding of the embodiments of the present application, the embodiments of the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. The embodiments of the present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used herein in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only used for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the embodiments of the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first voltage signal may be referred to as a second voltage signal, and similarly, a second voltage signal may be referred to as a first voltage signal, without departing from the scope of the present application. The first voltage signal and the second voltage signal are both voltage signals, but they are not the same voltage signal.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly 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 the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.

The embodiment of the application provides a power supply device applied to electronic equipment, and the power supply device of the embodiment of the application is used for supplying power to other devices in the electronic equipment, wherein the other devices can be a display device, a radio frequency device and the like, and the specific types of the other devices can be determined according to the type of the electronic equipment. The electronic device may be a smart phone, a tablet computer, a game device, an Augmented Reality (AR) device, a notebook, a desktop computing device, a wearable device, or the like. For convenience of understanding, the electronic device is exemplified as a mobile phone.

Fig. 1 is a block diagram showing a configuration of a power supply apparatus according to an embodiment, and referring to fig. 1, the power supply apparatus includes a battery 100, a DCDC converter 200, and a voltage regulator 300.

The battery 100 is used to provide a power supply voltage signal to the DCDC converter 200. The power voltage signal can be understood as a dc voltage signal, and the voltage value of the power voltage signal is directly related to the amount of power stored in the battery 100. Specifically, the more the amount of power stored in battery 100, the greater the input voltage; the less the amount of power stored in battery 100, the smaller the input voltage. Therefore, the DCDC converter 200 and the voltage regulator 300 are correspondingly arranged to process the power supply voltage signal so as to generate the first target signal with a stable voltage value. The first target voltage may be a supply voltage of other devices in the electronic apparatus, for example, may be 4.6V of a supply voltage required by the display panel 20.

The DCDC converter 200 is connected to the battery 100, and is configured to receive the power supply voltage signal and boost the power supply voltage signal to generate a first voltage signal. The power supply voltage signal has a power supply voltage, the first voltage signal has a first voltage, and the first voltage is higher than the power supply voltage. The DCDC converter 200 may configure the first voltage in an OTP (One Time Programmable) manner, so that the DCDC converter 200 can constantly output the first voltage regardless of a specific value of the power supply voltage. Based on this, the DCDC converter 200 of the present embodiment may be understood as a boost circuit, for example, a boost circuit.

The voltage regulator 300 may be a package structure, and the voltage regulator 300 is configured with a plurality of terminals to connect with other devices outside. Specifically, the voltage regulator 300 is configured with an enable control terminal CE for receiving an enable control signal and a signal input terminal VIN for receiving the first voltage signal. The signal input terminal VIN is connected to the DCDC converter 200, and the voltage regulator 300 is configured to receive the first voltage signal, filter ac ripples in the first voltage signal in response to the enable control signal, and perform voltage reduction processing on the first voltage signal to generate a first target signal.

The voltage regulator 300 may simultaneously implement ac ripple filtering and voltage reduction functions through an integrated circuit structure to output a first target signal having a first target voltage. Illustratively, the voltage regulator 300 may be a low dropout regulator (LDO) 300. The voltage regulator 300 may also include a ripple filtering circuit and a voltage reduction circuit, respectively, connected in series. For example, an input end of the ripple filtering circuit may be connected to an output end of the DCDC converter 200, and an output end of the ripple filtering circuit may be connected to an input end of the voltage reduction circuit, that is, the ripple filtering circuit may filter the ac ripple in the first voltage signal, and the voltage reduction circuit may perform voltage reduction processing on the first voltage signal after filtering the ripple, so as to generate the first target signal. It is to be understood that the structure of the voltage regulator 300 described above is for illustrative purposes only and is not intended to limit the scope of the present application.

The description will be given taking an electronic device as an example of a display device, and the display device refers to an electronic device having a display function. The display device includes a display panel, and the first target voltage is a power supply voltage ELVDD supplied to a pixel driving circuit of the display panel. The power supply device may supply power to a display panel in the display apparatus, the first voltage may be 4.8V, specifically, the output voltage of the DCDC converter 200 may be configured to be 4.8V by way of OTP, and the first target voltage may be a supply voltage of the display panel, for example, 4.6V. Further, the driving current of the light emitting device in the display panel satisfies the following formula:

I_D＝β(ELVDD-V_Data)²

where ELVDD refers to a power supply voltage, V, supplied to the display panel_DataThe data voltage is a data voltage corresponding to the luminance of the light emitting device, and β is a predetermined coefficient. Based on the above formula, it can be found that the drive current is positively correlated with the square of the power supply voltage. Therefore, if the power supply voltage ELVDD has a ripple, the driving current will have a more serious fluctuation problem. For the display panel, the fluctuation can cause the display panel to have the problems of screen flickering and horizontal stripes and the like.

In addition, as the demand of human beings for display pictures is higher and higher, the resolution of the display panel has been gradually developed from fhd (full High definition) to qhd (quarter High definition), the refresh rate is increased from 60Hz to 120Hz, the display panel process is developed from hard screen to soft screen, and the form of the display panel is changed from flat to curved. The above change also has a great influence on the circuit inside the display panel, and in short, it can be understood that the resistance and the capacitance of the display panel are further increased. Therefore, as the display panel is used as a load of the DCDC converter 200, the cross striations of the display panel will become more and more obvious with the above upgrade. Therefore, the present embodiment filters the ripple in the output signal of the DCDC converter 200 through the voltage regulator 300, and can ensure the stability of the power supply voltage ELVDD, thereby suppressing the cross striations of the display panel.

In the present embodiment, the power supply device includes: a battery 100 for providing a power supply voltage signal; a DCDC converter 200 connected to the battery 100, for receiving the power supply voltage signal and performing a voltage boosting process on the power supply voltage signal to generate a first voltage signal; a voltage regulator 300 configured with an enable control terminal CE for receiving an enable control signal and a signal input terminal VIN for receiving the first voltage signal, the signal input terminal VIN being connected with the DCDC converter 200, the voltage regulator 300 being configured to receive the first voltage signal, filter an ac ripple in the first voltage signal in response to the enable control signal, and perform a voltage reduction process on the first voltage signal to generate a first target signal. By disposing the voltage regulator 300 at the back end of the DCDC converter 200, on one hand, the voltage regulator 300 can filter out ripples in the first voltage signal output by the DCDC converter 200, thereby providing a first target signal with stable voltage. On the other hand, the number of circuits at the rear end of the voltage stabilizer 300 is relatively small, so that the problem that the voltage stabilizer 300 cannot drive a load can be avoided, the problem that the voltage stabilizer 300 is burnt due to the fact that the load of the voltage stabilizer 300 is too large can be prevented, and the stability and the reliability of the power supply device are greatly improved.

Fig. 2 is a second block diagram of the power supply apparatus according to an embodiment, and referring to fig. 2, the signal input terminal VIN and the enable control terminal CE of the voltage regulator 300 are both connected to the first output terminal ELVDD of the DCDC converter 200, and the first voltage output by the DCDC converter 200 can be regulated to 4.8V by way of OTP, and the first voltage signal of 4.8V is used as the enable control signal, so as to control the voltage regulator 300. Specifically, when the DCDC converter 200 does not output the first voltage signal, the control signal received by the enable control terminal CE of the voltage regulator 300 controls the voltage regulator 300 to turn off, so as to reduce the power consumption of the voltage regulator 300. When the DCDC converter 200 outputs the first voltage signal, the control signal received by the enable control terminal CE of the voltage regulator 300 controls the voltage regulator 300 to turn on, so that the voltage regulator 300 can stably output the ripple-free first target signal. The power supply apparatus of the present embodiment can simplify the circuit design, and can also achieve the purpose of reducing the power consumption of the power supply apparatus by turning off the voltage regulator 300 in time.

Fig. 3 is a third block diagram of a power supply apparatus according to an embodiment, and referring to fig. 3, in the present embodiment, the voltage regulator 300 is further configured to output a signal output terminal VOUT of the first target signal, and the power supply apparatus further includes a discharging circuit 400. A first terminal of the discharge circuit 400 is connected to the signal input terminal VIN, and a second terminal of the discharge circuit 400 is connected to the signal output terminal VOUT. The discharge circuit 400 is configured to be turned off when the voltage at the first terminal is greater than the voltage at the second terminal, so as to implement a normal output function of the voltage regulator 300. The discharging circuit 400 is further configured to be turned on when the voltage at the first end is less than or equal to the voltage at the second end, if the signal input terminal VIN of the voltage stabilizer 300 is powered down, that is, the first voltage input to the signal input terminal VIN is reduced to 0V, and within a short time, the voltage at the signal output terminal VOUT of the voltage stabilizer 300 is still at the first target voltage of 4.6V, the discharging circuit 400 is turned on, so that the voltage at the signal output terminal VOUT of the voltage stabilizer 300 is rapidly reduced to 0V, the response speed of the output signal of the voltage stabilizer 300 is increased, and the reliability of the power supply apparatus is further improved.

Fig. 4 is a schematic diagram of a structure of a voltage regulator 300 and a discharge circuit 400 according to an embodiment, and referring to fig. 4, in the embodiment, the discharge circuit 400 includes a diode D1, an anode of the diode D1 is connected to a signal output terminal VOUT of the voltage regulator 300, and a cathode of the diode D1 is connected to a signal input terminal VIN of the voltage regulator 300. The present embodiment, based on the characteristic of unidirectional conduction of the diode D1, can achieve the aforementioned turning-off when the voltage at the signal input terminal VIN of the voltage regulator 300 is greater than the voltage at the signal output terminal VOUT of the voltage regulator 300, and turning-on when the voltage at the signal input terminal VIN of the voltage regulator 300 is less than or equal to the voltage at the signal output terminal VOUT of the voltage regulator 300. In this embodiment, by providing the diode D1, a desired discharge function can be realized by a relatively simple circuit structure, thereby simplifying a circuit layout of the power supply device and improving a response speed of the power supply device.

Fig. 5 is a second schematic diagram of the structure of the voltage regulator 300 and the discharge circuit 400 according to an embodiment, referring to fig. 5, in this embodiment, the discharge circuit 400 further includes a resistor R1, one end of the resistor R1 is connected to the anode of the diode, and the other end of the resistor R1 is connected to the signal output terminal VOUT of the voltage regulator 300. It can be understood that if the voltage difference between the signal input terminal VIN and the signal output terminal VOUT of the voltage regulator 300 is too large, the discharge current is large, and the device in the power supply apparatus is easily damaged. In this embodiment, by providing the resistor R1, the discharge current can be effectively reduced, thereby protecting the power supply device.

Fig. 6 is a third schematic diagram of the structure of the voltage regulator 300 and the discharge circuit 400 according to an embodiment, and referring to fig. 6, in this embodiment, a connection manner of peripheral circuits related to the voltage regulator 300 is further provided. Specifically, the power supply device further includes an output capacitor Cout, the output capacitor Cout can be charged by the first target signal output by the voltage stabilizer 300, and the power supply voltage transmitted to the load Rload can be stabilized based on the charging and discharging function of the output capacitor Cout, so that the reliability of the output signal is improved. The power supply apparatus further includes an input capacitor Cin of the voltage regulator 300, and similar to the output capacitor Cout, the input capacitor Cin may buffer an input signal of the voltage regulator 300, so as to improve stability of the input first voltage signal.

Fig. 7 is a timing diagram of input signals and output signals of the voltage regulator according to an embodiment, and referring to fig. 7, VDD is a signal transmitted to a signal input terminal VIN of the voltage regulator, CE is a signal transmitted to an enable control terminal CE of the voltage regulator, Vout1 is a signal of a signal output terminal Vout of the voltage regulator when the discharge circuit is not set, and Vout2 is a signal of a signal output terminal Vout of the voltage regulator when the discharge circuit is set. It can be found that by arranging the discharge circuit, the power-down time of the signal output end VOUT of the voltage stabilizer can be greatly shortened, namely, the response speed of the voltage stabilizer is improved.

Fig. 8 is an internal circuit diagram of the voltage regulator 300 according to an embodiment, and referring to fig. 8, in the embodiment, the voltage regulator 300 includes a voltage comparator 310, a reference voltage source 320, an inverter 330, a transistor T1, a feedback circuit, and a resistor R3. The feedback circuit may include a resistor R2 and a resistor R3, among others. One end of the resistor R2 is connected with the input end of the feedback signal VFB, the other end of the resistor R2 is connected with one end of the resistor R3, the other end of the resistor R3 is grounded, and a node between the resistor R2 and the resistor R3 is connected with the non-inverting input end of the voltage comparator 310. The inverting input terminal of the voltage comparator 310 is connected to the positive terminal of the reference voltage source 320, and the enable terminal of the voltage comparator 310 is connected to the enable control terminal CE of the voltage regulator 300 through the inverter 330. The negative terminal of the reference voltage source 320 is grounded, and the negative terminal of the reference voltage source 320 is connected to the enable control terminal CE of the voltage regulator 300 through a resistor R4. The control terminal of the transistor T1 is connected to the output terminal of the voltage comparator 310, the first terminal of the transistor T1 is connected to the signal input terminal VIN of the regulator 300, and the second terminal of the transistor T1 is connected to the signal output terminal VOUT of the regulator 300. Based on the above structure, the voltage regulator 300 can realize ripple filtering processing and voltage reduction processing on the first voltage signal of the input terminal, thereby outputting a required first target signal. It is understood that the voltage regulator 300 of the present embodiment is for illustrative purposes only, and in other embodiments, other configurations of the voltage regulator 300 may be used.

Fig. 9 is a fourth block diagram illustrating a power supply device according to an embodiment of the present invention, wherein the power supply device includes a battery 100, a voltage regulator 300, and a DCDC converter 200. The battery 100 is used to provide a dc power supply voltage signal. The voltage stabilizer 300 is connected to the battery 100, and is configured to receive the power supply voltage signal, filter ac ripples in the power supply voltage signal, and perform voltage reduction processing on the power supply voltage signal to generate a second voltage signal. The DCDC converter 200 is connected to the voltage regulator 300, and is configured to perform a voltage boosting process on the second voltage signal to generate a first target signal. The second voltage signal has a second voltage, and the second voltage may be 4.3V. In this embodiment, without special adjustment of the output voltage of the DCDC converter 200, the ripple in the second voltage signal input to the DCDC converter 200 can be filtered by the voltage regulator 300, so as to improve the stability of the first target signal output by the DCDC converter 200.

Fig. 10 is a fifth block diagram illustrating a configuration of a power supply apparatus according to an embodiment, in which the DCDC converter 200 is configured with a first input terminal AVIN, a second input terminal PVIN, a first output terminal ELVDD, and a second output terminal ELVSS. The first input terminal AVIN is connected to an output terminal of the voltage regulator 300, and is configured to receive the second voltage signal; the second input terminal PVIN is connected to an input terminal of the voltage regulator 300, and is configured to receive the power supply voltage signal, and the second input terminal PVIN is independent of the first input terminal AVIN. The DCDC converter 200 is configured to generate the first target signal having a first target voltage according to a second voltage signal from the first input terminal AVIN, and output the first target signal by the first output terminal ELVDD, and the DCDC converter 200 is further configured to perform a voltage-down process on a power supply voltage signal from the second input terminal PVIN to generate a second target signal having a second target voltage, and output the second target signal by the second output terminal ELVSS, where the second target voltage is less than the first target voltage. For example, the second target signal may be a power supply voltage ELVSS supplied to the pixel driving circuit of the display panel, and the power supply voltage ELVSS may be, for example, -2.4V to-3.5V.

It is understood that the number of pixels in the display panel is larger for larger-sized displays, or the requirement for the power supply voltage ELVDD is higher for display panels in the highlight mode. Therefore, the power of the voltage regulator 300 easily reaches the limit, thereby causing a problem that abnormality may occur in the first target signal output from the power supply device. The ripple has a relatively small influence on the second target signal, so that even if a certain ripple exists in the signal input by the second input terminal PVIN, the ripple does not have a serious influence on the display performance of the display panel. In the embodiment, the voltage regulator 300 supplies the first input terminal AVIN in a single-path manner, and the voltage regulator 300 only needs to bear the output pressure of the first output terminal ELVDD, so that the power of the voltage regulator 300 is reduced, the operation stability of the voltage regulator 300 is improved, and the reliability of the power supply device is improved.

Further, with continued reference to fig. 10, the DCDC converter 200 may be further configured with a third output terminal AVDD configured to output a third target signal, which may have a voltage of 6.7V to 7.6V, for example, and is used to supply power to the display driving chip to provide the goa (gate on array) and GAMMA voltages.

Fig. 11 is a sixth block diagram illustrating a configuration of a power supply apparatus according to an embodiment, in the present embodiment, the DCDC converter 200 is configured with a first input terminal AVIN, a second input terminal PVIN, a first output terminal ELVDD, and a second output terminal ELVSS; the first input terminal AVIN and the second input terminal PVIN are respectively connected to the output terminal of the voltage regulator 300, and are configured to respectively receive the second voltage signal. The DCDC converter 200 is configured to output the first target signal from the first output terminal ELVDD, further configured to perform a voltage reduction process on the second voltage signal to generate a second target signal, and output the second target signal from the second output terminal ELVSS. In this embodiment, it is not necessary to provide the first input terminal AVIN and the second input terminal PVIN to the DCDC converter 200 independently, so that the internal design of the DCDC converter 200 can be simplified, and a power supply apparatus with a simpler structure can be provided.

The embodiment of the application also provides display equipment which comprises a display panel and the power supply device, wherein the power supply device is used for supplying power to the display panel by using the first target voltage. For specific limitations of the power supply apparatus, reference may be made to the foregoing embodiments, which are not repeated herein. Based on aforementioned power supply unit, the risk that the display panel of this embodiment takes place to blink the horizontal stripe is lower, promptly, provides a better, the higher display device of display quality of display stability.

Fig. 12 is a schematic structural diagram of a display device according to an embodiment, referring to fig. 12, in this embodiment, the display panel (not shown) includes a display driving chip 500, the enable control terminal CE of the voltage regulator 300 is connected to the display driving chip 500 or the output terminal of the DCDC converter 200, and when the signal input terminal VIN of the voltage regulator 300 is connected to the DCDC converter 200 and the enable control terminal CE of the voltage regulator 300 is connected to the display driving chip 500, the display driving chip 500 is configured to output the enable control signal. In this embodiment, the enable control signal of the voltage regulator 300 is provided by the display driver chip 500, and the display driver chip 500 may output a corresponding enable control signal according to the voltage requirement of the display driver chip, for example, the voltage regulator 300 may be turned off at any time as needed, so as to achieve more precise control of the voltage regulator 300 and make the application of the power supply apparatus more flexible.

Fig. 13 is a block diagram of a partial structure of a display device of an embodiment. Referring to fig. 13, the display apparatus includes: antenna system 1310, memory 1320, input unit 1330, display unit 1340, sensor 1350, audio circuit 1360, wireless fidelity (WIFI) module 1370, processor 1380, and power supply 1390. Those skilled in the art will appreciate that the handset configuration shown in fig. 13 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The antenna system 1310 may be configured to receive and transmit information or signals during a call, and may receive downlink information of a base station and then process the received downlink information to the processor 1380; the uplink data may also be transmitted to the base station. The memory 1320 may be used to store software programs and modules, and the processor 1380 executes various functional applications and data processing of the cellular phone by operating the software programs and modules stored in the memory 1320. The memory 1320 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as an application program for a sound playing function, an application program for an image playing function, and the like), and the like; the data storage area may store data (such as audio data, an address book, etc.) created according to the use of the mobile phone, and the like. Further, the memory 1320 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 1330 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the display device. In one embodiment, input unit 1330 may include a touch panel 1331 as well as other input devices 1332. Touch panel 1331, which may also be referred to as a touch screen, can collect touch operations by a user (e.g., operations by a user on or near touch panel 1331 using a finger, a stylus, or any other suitable object or accessory) and drive the corresponding connection device according to a preset program. In one embodiment, touch panel 1331 can include two portions, a touch measurement device and a touch controller. The touch measuring device measures the touch direction of a user, measures signals brought by touch operation and transmits the signals to the touch controller; the touch controller receives touch information from the touch measurement device, converts it to touch point coordinates, and provides the touch point coordinates to the processor 1380, where the touch controller can receive and execute commands from the processor 1380. In addition, the touch panel 1331 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 1330 may include other input devices 1332 in addition to the touch panel 1331. In one embodiment, other input devices 1332 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), and the like.

The display unit 1340 may be used to display information input by a user or information provided to the user and various menus of the cellular phone. The display unit 1340 may include a display panel 1341. In one embodiment, the Display panel 1341 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. In one embodiment, touch panel 1331 can overlay display panel 1341 and, when touch panel 1331 measures a touch event thereon or thereabout, communicate to processor 1380 to determine the type of touch event, and processor 1380 then provides a corresponding visual output on display panel 1341 based on the type of touch event. Although in fig. 13, the touch panel 1331 and the display panel 1341 are two independent components to implement the input and output functions of the mobile phone, in some embodiments, the touch panel 1331 and the display panel 1341 may be integrated to implement the input and output functions of the mobile phone.

The display device may also include at least one sensor 1350, such as light sensors, motion sensors, and other sensors. In one embodiment, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel 1341 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 1341 and/or the backlight when the phone is moved to the ear. The motion sensor can comprise an acceleration sensor, the acceleration sensor can measure the magnitude of acceleration in each direction, the magnitude and the direction of gravity can be measured when the mobile phone is static, and the motion sensor can be used for identifying the application of the gesture of the mobile phone (such as horizontal and vertical screen switching), vibration identification related functions (such as pedometer and knocking) and the like. The mobile phone may be provided with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor.

The audio circuit 1360, speaker 1361, and microphone 1362 may provide an audio interface between the user and the cell phone. The audio circuit 1360 may transmit the electrical signal converted from the received audio data to the speaker 1361, and the electrical signal is converted into a sound signal by the speaker 1361 and output; on the other hand, the microphone 1362 converts the collected sound signal into an electrical signal, which is received by the audio circuit 1360 and converted into audio data, and then the audio data is processed by the audio data output processor 1380, and then the audio data is transmitted to another mobile phone through the antenna system 1310, or the audio data is output to the memory 1320 for subsequent processing.

WIFI belongs to short-distance wireless transmission technology, and the mobile phone can help a user to receive and send emails, browse webpages, access streaming media and the like through the WIFI module 1370, and provides wireless broadband internet access for the user. Although fig. 13 illustrates the WIFI module 1370, it can be understood that the antenna system 1310 may include a radiation segment of a WIFI frequency band, and the radiation segment may implement signal transceiving of the WIFI frequency band, so the WIFI module 1370 does not belong to an essential component of the display device, and may be omitted as needed.

The processor 1380 is a control center of the mobile phone, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 1320 and calling data stored in the memory 1320, thereby integrally monitoring the mobile phone. In one embodiment, processor 1380 may include one or more processing units. In one embodiment, the processor 1380 may integrate an application processor and a modem processor, wherein the application processor primarily handles operating systems, user interfaces, application programs, and the like; the modem processor handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated within processor 1380.

The display device also includes a power supply 1390 (e.g., a battery) to supply power to the various components, which may preferably be logically coupled to the processor 1380 via a power management system to manage charging, discharging, and power consumption management functions via the power management system.

In one embodiment, the display device may further include a camera, a bluetooth module, and the like.

Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Suitable non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the appended claims.

Claims

1. A power supply device, comprising:

a battery for providing a supply voltage signal;

2. The power supply apparatus according to claim 1, wherein the enable control terminal is connected to an output terminal of the DCDC converter and uses the first voltage signal as the enable control signal.

3. The power supply apparatus of claim 2, wherein the voltage regulator is further configured to have a signal output for outputting the first target signal, the power supply apparatus further comprising:

and the first end of the discharge circuit is connected with the signal input end, the second end of the discharge circuit is connected with the signal output end, and the discharge circuit is used for being switched off when the voltage of the first end is greater than that of the second end and being switched on when the voltage of the first end is less than or equal to that of the second end.

4. The power supply device according to claim 3, wherein the discharge circuit includes:

and the anode of the diode is connected with the signal output end of the voltage stabilizer, and the cathode of the diode is connected with the signal input end of the voltage stabilizer.

5. The power supply device according to claim 4, wherein the discharge circuit further comprises:

and one end of the resistor is connected with the anode of the diode, and the other end of the resistor is connected with the signal output end of the voltage stabilizer.

6. A power supply device, comprising:

the battery is used for providing a direct-current power supply voltage signal;

7. The power supply apparatus according to claim 6, wherein the DCDC converter is configured with a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the first input end is connected with the output end of the voltage stabilizer and used for receiving the second voltage signal; the second input end is connected with the input end of the voltage stabilizer and used for receiving the power supply voltage signal, and the second input end and the first input end are independent of each other;

the DCDC converter is configured to generate the first target signal having a first target voltage according to a second voltage signal from the first input terminal, and output the first target signal by the first output terminal, and is further configured to perform a voltage reduction process on a power supply voltage signal from the second input terminal to generate a second target signal having a second target voltage, and output the second target signal by the second output terminal, where the second target voltage is smaller than the first target voltage.

8. The power supply apparatus according to claim 6, wherein the DCDC converter is configured with a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the first input end and the second input end are respectively connected with the output end of the voltage stabilizer and used for respectively receiving the second voltage signal;

the DCDC converter is used for outputting the first target signal through the first output end, and is also used for carrying out voltage reduction processing on the second voltage signal to generate a second target signal, and outputting the second target signal through the second output end.

9. A display device, comprising:

a display panel;

the power supply device according to any one of claims 1 to 8, the power supply device being configured to supply power to the display panel at the first target voltage.

10. The display device according to claim 9, wherein the display panel includes a display driver chip, the enable control terminal of the voltage regulator is connected to the display driver chip or an output terminal of the DCDC converter, and the display driver chip is configured to output the enable control signal when the signal input terminal of the voltage regulator is connected to the DCDC converter and the enable control terminal of the voltage regulator is connected to the display driver chip.