CN111431379B - Power supply circuit and electronic device - Google Patents

Power supply circuit and electronic device Download PDF

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Publication number
CN111431379B
CN111431379B CN202010313946.9A CN202010313946A CN111431379B CN 111431379 B CN111431379 B CN 111431379B CN 202010313946 A CN202010313946 A CN 202010313946A CN 111431379 B CN111431379 B CN 111431379B
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China
Prior art keywords
display screen
power supply
chip
voltage signal
output
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CN202010313946.9A
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Chinese (zh)
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CN111431379A (en
Inventor
李明阳
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202010313946.9A priority Critical patent/CN111431379B/en
Publication of CN111431379A publication Critical patent/CN111431379A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/03—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
    • G09G3/035—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays for flexible display surfaces
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The application discloses a power supply circuit and an electronic device. The power supply circuit includes: the power supply chip comprises a power supply output end, and the power supply output end is used for outputting power supply signals to the display screen and the second display screen; the first switch unit is connected between the power chip and the first display screen, and is used for transmitting a power signal to the first display screen when in a conducting state and stopping transmitting the power signal to the first display screen when in a disconnecting state; and the second switch unit is connected between the power chip and the second display screen, the second switch unit enables a power supply signal to be transmitted to the second display screen when in a conducting state, and cuts off the power supply signal to be transmitted to the second display screen when in a disconnecting state, wherein at least one of the first switch unit and the second switch unit keeps in the disconnecting state. Therefore, the number of the power supplies can be single, and the miniaturization design of the electronic device is facilitated.

Description

Power supply circuit and electronic device
Technical Field
The present application relates to the field of electronic devices, and in particular, to a power supply circuit and an electronic apparatus.
Background
With the increase of application scenes of display screens, on some electronic devices, the electronic devices are configured with two or even a plurality of display screens, each display screen corresponds to one power supply chip, and the power supply chip is used for providing power supply signals for the corresponding display screen. However, the power chip occupies a large space, which is not favorable for the miniaturization design of the electronic device.
Disclosure of Invention
The application provides a power supply circuit and an electronic device.
The power supply circuit of the embodiment of the application is used for an electronic device, the electronic device shell is respectively arranged on a first display screen and a second display screen which are arranged on two opposite sides of the shell, and the power supply circuit comprises:
the power supply chip comprises a power supply output end, and the power supply output end is used for outputting power supply signals to the first display screen and the second display screen;
the first switch unit is connected between the power chip and the first display screen, and when the first switch unit is in a conducting state, the power signal is transmitted to the first display screen, and when the first switch unit is in a disconnecting state, the power signal is cut off and transmitted to the first display screen; and
and the second switch unit is connected between the power chip and the second display screen, the second switch unit enables the power signal to be transmitted to the second display screen when in a conducting state, and the second switch unit is cut off when in a disconnecting state and transmits the power signal to the second display screen, wherein at least one of the first switch unit and the second switch unit keeps in a disconnecting state.
An electronic device, comprising:
a housing;
the first display screen and the second display screen are respectively arranged on two opposite sides of the shell; and
the power supply circuit is electrically connected with the first display screen and the second display screen.
In the electronic device and the power supply circuit of the embodiment of the application, at least one of the first switch unit and the second switch unit is kept in the off state, so that the power supply chip can provide a power supply signal for one of the display screens, and the power supply chip can control the power supply signals of the first display screen and the second display screen, thereby reducing the number of the power supply chips and being beneficial to the miniaturization design of the electronic device.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a perspective view of an electronic device according to an embodiment of the present application.
Fig. 2 is another state diagram of the electronic device according to the embodiment of the present application.
Fig. 3 is a block diagram of a power supply circuit according to an embodiment of the present application.
Fig. 4 is a schematic configuration diagram of a power supply circuit according to an embodiment of the present application.
Fig. 5 is a schematic configuration diagram of a power supply circuit according to an embodiment of the present application.
Fig. 6 is a schematic configuration diagram of a power supply circuit according to an embodiment of the present application.
Fig. 7 is a schematic configuration diagram of a power supply circuit according to an embodiment of the present application.
Fig. 8 is a schematic configuration diagram of a power supply circuit according to an embodiment of the present application.
Fig. 9 is a schematic configuration diagram of a power supply circuit according to an embodiment of the present application.
Description of the main element symbols:
the electronic device 200, the housing 210, the first portion 212, the second portion 214, the first display screen 220, the first input 222 of the first display screen 220, the second input 224 of the first display screen 220, the second display screen 230, the first input 232 of the second display screen 230, the second input 234 of the second display screen 230;
the driving circuit comprises a power supply circuit 100, a power supply chip 10, a first output end 11, a second output end 12, a third output end 13, a first control end 14, a second control end 15, a first boost circuit 16, a buck circuit 17, a second boost circuit 18, a first switch unit 20, a second switch unit 30, a first wire 101, a second wire 102, a third wire 103, a fourth wire 104, a first driving chip 40, a first charge pump 42, a second driving chip 50, a second charge pump 52, a first voltage signal S1, a second voltage signal S2, a third voltage signal S3, a fourth voltage signal S4, a fifth voltage signal S5, a sixth voltage signal S6, and a seventh voltage signal S7.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1, an electronic device 200 according to an embodiment of the present disclosure includes a housing 210, a first display 220, a second display 230, and a power circuit 100. The first display screen 220 and the second display screen 230 are respectively disposed on opposite sides of the housing 210. The power circuit 100 electrically connects the first display screen 220 and the second display screen 230. The power supply circuit 100 is used to supply power to the first display screen 220 and the second display screen 230.
The electronic apparatus 200 may illustratively be any of various types of computer system devices (only one modality is illustratively shown in fig. 1) that are mobile or portable and that perform wireless communications. Specifically, the electronic apparatus 200 may be a mobile phone or a smart phone (e.g., an iPhone-based phone), a Portable game device (e.g., Nintendo DS, PlayStation Portable, game Advance, iPhone), a laptop computer, a PDA, a Portable internet device, a music player, and a data storage device, other handheld devices, and a head-mounted device such as a watch, an in-ear phone, a pendant, a headset, etc., and the electronic apparatus 200 may also be other wearable devices (e.g., a head-mounted device such as electronic glasses, electronic clothes, an electronic bracelet, an electronic necklace, an electronic tattoo, an electronic device, or a smart watch).
The electronic apparatus 200 may also be any of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controllers, laptop computers, desktop computers, printers, netbook computers, personal digital assistants, Portable Multimedia Players (PMPs), moving Picture experts group (MPEG-1 or MPEG-2) Audio layer 3 (MP 3) players, portable medical devices, and digital cameras and combinations thereof.
In some cases, the electronic device 200 may perform a variety of functions (e.g., playing music, displaying video, storing pictures, and receiving and sending telephone calls). If desired, the electronic apparatus 200 may be a portable device such as a cellular telephone, media player, other handheld device, wristwatch device, pendant device, earpiece device, or other compact portable device.
The housing 210 can reduce the impact on the components such as the first display screen 220 and the second display screen 230, and improve the service life of the electronic device 200. Specifically, the housing 210 may be a rectangular frame as a whole, so that the electronic device 200 is rectangular as a whole. In order to make the electronic device 200 beautiful, the corner positions of the housing 210 may be rounded to make the electronic device 200 have a rounded rectangular shape. The housing 210 may be formed by machining an aluminum alloy using a numerical control machine, or may be formed by injection molding using a material such as Polycarbonate (PC).
The first display screen 220 and the second display screen 230 are respectively located on two opposite sides of the housing 210, so that the electronic device 200 has a display function in a plurality of positions, and the application range of the electronic device 200 is expanded. For example, the first display screen 220 may be used to play video and the second display screen 230 may be used to display text.
The first display 220 and the second display 230 may be fixed to the case 210 by means of adhesion. The size of the first display screen 220 and/or the second display screen 230 may be 4 inches, 5 inches, 7 inches, and the like, and the specific size of the first display screen 220 and the second display screen 230 is not limited in the present application.
The power supply circuit 100 may be integrated on a main circuit (main board) of the electronic apparatus 200, or may be formed by connection of electronic devices respectively located on different circuit boards.
Referring to fig. 2, in some embodiments, the housing 210 includes a first portion 212 and a second portion 214 rotatably disposed with respect to the first portion 212, the first display 220 and the second display 230 are both flexible displays, and the first display 220 and the second display 230 are both disposed on the first portion 212 and the second portion 214.
That is, the electronic device 200 may have a folding function. The first portion 212 may be folded relative to the second portion 214 to reduce at least one dimension of the electronic device 200. For example, after the electronic device 200 is folded, the length of the electronic device 200 is reduced, so that the space occupied by the electronic device 200 is smaller, and the portability of the electronic device 200 is improved.
For example, the first portion 212 and the second portion 214 are adjacent to each other to transition the electronic device 200 from the flattened state to the folded state. As another example, the first portion 212 and the second portion 214 are moved away from each other to transition the electronic device 200 from the folded state to the flattened state. Fig. 1 shows the electronic device 200 in a flattened state. Fig. 2 shows the electronic device 200 in a folded state.
The first display screen 220 and the second display screen 230 are both flexible display screens, so that the first display screen 220 and the second display screen 230 can deform during the folding process of the electronic device 200 to work normally.
The first display screen 220 and the second display screen 230 are, for example, OLED display screens. The Organic Light-Emitting Diode (OLED) display screen is Light, thin and bendable. Therefore, the OLED display screen can also satisfy the curved surface modeling of the electronic device 200 when exhibiting the content effect. The display screen can also adopt a Micro LED display screen. Of course, these display screens are merely exemplary, and embodiments of the present application are not limited thereto.
In the embodiment of the present application, the first portion 212 may include a first housing, and the first housing may be used to mount components of the electronic device 200, for example, a battery of the electronic device 200 may be mounted in the first housing. The first frame body can be made of plastic and the like. Similarly, the second portion 214 may include a second housing that may be used to mount components of the electronic device 200, for example, components such as a main circuit board and a battery of the electronic device 200 may be mounted within the second housing. The second frame body can be made of plastic and the like.
Of course, in other embodiments, the first portion 212 and the second portion 214 may be fixedly coupled, or the first portion 212 may not be rotatable relative to the first portion 212. The first portion 212 and the second portion 214 may be a unitary structure.
Referring to fig. 3, in the embodiment of the present disclosure, the power circuit 100 includes a power chip 10, a first switch unit 20, and a second switch unit 30, where the power chip 10 includes a power output terminal for outputting a power signal to the display screen and the second display screen 230.
The first switching unit 20 is connected between the power supply chip 10 and the first display screen 220. When the first switch unit 20 is in the on state, the power signal is transmitted to the first display 220, and when the first switch unit 20 is in the off state, the power signal is cut off and transmitted to the first display 220.
The second switching unit 30 is connected between the power chip 10 and the second display screen 230, and when the second switching unit 30 is in an on state, the power signal is transmitted to the second display screen 230, and when the second switching unit 30 is in an off state, the power signal is cut off and transmitted to the second display screen 230, wherein at least one of the first switching unit 20 and the second switching unit 30 maintains the off state.
In the power supply circuit 100 of the embodiment of the application, at least one of the first switch unit 20 and the second switch unit 30 is kept in the off state, so that the power supply chip 10 can provide a power supply signal to one of the display screens, and one power supply chip 10 can control the power supply signals of the first display screen 220 and the second display screen 230, thereby reducing the number of the power supply chips 10 and being beneficial to the miniaturization design of the electronic device 200.
In addition, the first switch unit 20 and the second switch unit 30 can prevent the power supply chip 10 from supplying power to the first display screen 220 and the second display screen 230 at the same time, and prevent the first display screen 220 and the second display screen 230 from generating abnormal current to cause abnormal display or even damage.
Referring to fig. 4, in some embodiments, the power chip 10 includes a first output terminal 11 and a second output terminal 12, the first output terminal 11 is used for outputting a first voltage signal S1, the second output terminal 12 is used for outputting a second voltage signal S2, and the first voltage signal S1 is greater than the second voltage signal S2.
The first input end 222 of the first display screen 220 is electrically connected to the first output end 11 through the first wire 101, the second input end 224 of the first display screen 220 is electrically connected to the second output end 12 through the second wire 102, and the first switch unit 20 is disposed on the first wire 101 or the second wire 102.
The first input end 232 of the second display screen 230 is electrically connected to the first output end 11 through the third wire 103, the second input end 234 of the second display screen 230 is electrically connected to the second output end 12 through the fourth wire 104, and the second switch unit 30 is disposed on the third wire 103 or the fourth wire 104.
In this way, the power chip 10 may provide the electrical signal to the first display screen 220 or the second display screen 230 by means of the wire.
Specifically, the first output terminal 11 is an ELVDD pin of the power chip 10, and the second output terminal 12 is an ELVSS pin of the power chip 10. The first output terminal 11 may provide a positive voltage to the first display panel 220 and the second display panel 230, and the second output terminal 12 may provide a negative voltage to the first display panel 220 and the second display panel 230, so that the pixels of the first display panel 220 and the second display panel 230 may normally operate, and the first display panel 220 and the second display panel 230 may normally operate. For example, the output voltage of the first output terminal 11 may be 6.4V, and the output voltage of the second output terminal 12 may be-2.5V.
It should be noted that the above-mentioned routing may be a continuous complete line, or may include multiple segments of lines. The traces may be formed on the circuit board by etching or the like.
It can be understood that, taking the first display screen 220 as an example, the first voltage signal S1 and the second voltage signal S2 need to be simultaneously applied to the first display screen 220 for the first display screen 220 to normally display, and therefore, the first switch unit 20 is disposed on the first trace 101 or the second trace 102, so as to control the application of the voltage signal to the first display screen 220.
Referring to fig. 5, in some embodiments, the power chip 10 includes a third output terminal 13, a first control terminal 14 and a second control terminal 15, the third output terminal 13 is used for outputting a third voltage signal S3, the first control terminal 14 is electrically connected to the first output terminal 11 and the second output terminal 12, and the second control terminal 15 is electrically connected to the third output terminal 13.
The power circuit 100 further includes a first driving chip 40 and a second driving chip 50, the first driving chip 40 and the second driving chip 50 are electrically connected to the third output terminal 13, the first control terminal 14 and the second control terminal 15, and the first driving chip 40 and the second driving chip 50 are used for controlling the operating state of the power chip 10.
Thus, the first driving chip 40 and the second driving chip 50 may be connected to the enable control terminal of the power chip 10, so as to control the output of the voltage signals of the first output terminal 11, the second output terminal 12 and the third output terminal 13, and further control the power chip 10 to provide power to the first display screen 220, the second display screen 230 and the driving chip itself.
Specifically, the third output terminal 13 may be an AVDD pin of the power supply chip 10. The voltage output by the third output terminal 13 may be 6.4V. The first control terminal 14 may be an EL _ EN pin of the power chip 10, and the second control terminal 15 may be an EL _ EL pin of the power chip 10. The first and second driver chips 40 and 50 may pass the enable timing of the first, second, and third voltage signals S1, S2, and S3. For example, the third voltage signal S3 may be enabled first, and then the first voltage signal S1 and the second voltage signal S2 may be enabled.
The power chip 10 may be a DC-DC chip, and a first voltage boost circuit 16, a voltage step-down circuit 17 and a second voltage boost circuit 18 may be disposed in the power chip 10, the first voltage boost circuit 16 is electrically connected to the first output end 11, the voltage step-down circuit 17 is electrically connected to the second output end 12, and the second voltage boost circuit 18 is electrically connected to the third output end 13. The first boost circuit 16 is used to boost the input voltage to make the first voltage signal S1 be a predetermined voltage value. The voltage step-down circuit 17 is configured to step down the input voltage to make the second voltage signal S2 be a predetermined voltage value. The first boosting circuit 16 is used to boost the input voltage to make the third voltage signal S3 be a predetermined voltage value.
It should be noted that the power signals output by the power chip 10 include the first voltage signal S1, the second voltage signal S2, and the third voltage signal S3. The output terminals of the power supply chip 10 include a first output terminal 11, a second output terminal 12, and a third output terminal 13.
Referring to fig. 6, in some embodiments, when the first switch unit 20 is in the on state, the first driving chip 40 controls the power chip 10 to output the first voltage signal S1 and the second voltage signal S2 to the first display 220 through the first control terminal 14, and controls the power chip 10 to output the third voltage signal S3 to the first driving chip 40 through the second control terminal 15, and the second driving chip 50 remains inactive.
In this way, when the first switch unit 20 is in the on state, the first voltage signal S1 and the second voltage signal S2 can make the pixel of the first display screen 220 emit light, so that the first display screen 220 displays normally, and the third voltage signal S3 can supply power to the first driver chip 40, thereby ensuring that the first driver chip 40 works normally to control the working state of the power chip 10.
It can be understood that when the first switching unit 20 is in the on state, the second switching unit 30 is in the off state, and therefore, the second display screen 230 has no power and is in the off state; while the first display screen 220 may be in a bright screen state, for example, the first display screen 220 may play video, music, etc. applications.
As shown in fig. 6, the flow of the first voltage signal S1, the second voltage signal S2, and the third voltage signal S3 is shown by the dashed lines in fig. 6.
Referring to fig. 7, in some embodiments, when the second switch unit 30 is in the on state, the second driving chip 50 controls the power chip 10 to output the first voltage signal S1 and the second voltage signal S2 to the second display 230 through the first control terminal 14, and controls the power chip 10 to output the third voltage signal S3 to the second driving chip 50 through the second control terminal 15, so that the first driving chip 40 does not operate.
In this way, when the second switch unit 30 is in the on state, the first voltage signal S1 and the second voltage signal S2 can make the pixel of the second display screen 230 emit light, so that the second display screen 230 displays normally, and the third voltage signal S3 can supply power to the second driver chip 50, thereby ensuring that the second driver chip 50 works normally to control the working state of the power chip 10.
It can be understood that when the second switching unit 30 is in the on state, the first switching unit 20 is in the off state, and therefore, the first display screen 220 has no power and is in the screen-off state; while the second display screen 230 may be in a bright screen state, for example, the second display screen 230 may play video, music, etc. applications.
As shown in fig. 7, the flow of the first voltage signal S1, the second voltage signal S2, and the third voltage signal S3 is shown by the dashed lines in fig. 7.
Referring to fig. 8, in some embodiments, a first charge pump 42(charge pump circuit) is disposed in the first driving chip 40, and the first charge pump 42 is electrically connected to the third output terminal 13 and the first input terminal 222 and the second input terminal 224 of the first display screen 220. The first charge pump 42 is used for outputting the fourth voltage signal S4 to the first input terminal 222 of the first display screen 220 and for outputting the fifth voltage signal S5 to the second input terminal 224 of the first display screen 220.
When the first and second switch units 20 and 30 are both in the off state, the first driving chip 40 controls the first charge pump 42 to output the fourth voltage signal S4 and the fifth voltage signal S5 to the first display screen 220 through the first control terminal 14, and controls the power supply chip 10 to output the third voltage signal S3 to the first driving chip 40 and the first charge pump 42 through the second control terminal 15, and the second driving chip 50 remains inactive.
Alternatively, when the first switch unit 20 and the second switch unit 30 are both in the off state, the third output terminal 13 may supply power to the first display screen 220 through the first charge pump 42, so that the first display screen 220 may display contents. Since the voltage provided by the first charge pump 42 is small, the display brightness of the first display screen 220 may be low. At this time, the first display 220 may be in an AOD (always on display) state, and when the first display 220 is in the AOD state, a partial area of the first display 220 is in a lighting state to display predetermined content, and the other partial area is in a turning-off state. For example, when the first display screen 220 is in the AOD state, the first display screen 220 may display the date, time, signal strength, and the like.
As shown in fig. 8, the flow directions of the third voltage signal S3, the fourth voltage signal S4 and the fifth voltage signal S5 are shown by the dotted lines in fig. 8.
Referring to fig. 9, in some embodiments, a second charge pump 52 is disposed in the second driving chip 50, the second charge pump 52 is electrically connected to the third output terminal 13 and the first input terminal 232 and the second input terminal 234 of the second display panel 230, and the second charge pump 52 is configured to output a sixth voltage signal S6 to the first input terminal 232 of the second display panel 230 and output a seventh voltage signal S7 to the second input terminal 234 of the second display panel 230.
When the first and second switch units 20 and 30 are both in the off state, the first driving chip 40 controls the second charge pump 52 to output the sixth and seventh voltage signals S6 and S7 to the second display screen 230 through the first control terminal 14, and controls the power supply chip 10 to output the third voltage signal S3 to the first and second driving chips 40 and 52 through the second control terminal 15, and the first driving chip 40 remains inactive.
Alternatively, when the first switching unit 20 and the second switching unit 30 are both in the off state, the third output terminal 13 may supply power to the second display screen 230 through the second charge pump 52, so that the second display screen 230 may display content. The display brightness of the second display screen 230 may be low due to the low voltage provided by the second charge pump 52. At this time, the second display screen 230 may be in an AOD (always on display) state, and when the second display screen 230 is in the AOD state, a partial area of the second display screen 230 is in a lighting state to display predetermined contents, and the other partial area is in a turning-off state. For example, when the second display screen 230 is in the AOD state, the second display screen 230 may display the date, time, signal strength, and the like.
As shown in fig. 9, the flow of the third voltage signal S3, the sixth voltage signal S6, and the seventh voltage signal S7 is shown by the dashed lines in fig. 9.
In some embodiments, the first switching unit 20 includes a transistor, and a gate of the transistor is electrically connected to a processor (CPU) of the electronic device 200. And/or
The second switching unit 30 includes a transistor, and a gate of the transistor is electrically connected to a processor of the electronic device 200.
Alternatively, the first switching unit 20 and the second switching unit 30 each include a transistor; or, the first switching unit 20 includes a triode; alternatively, the second switching unit 30 includes a transistor.
Since the transistor is easy to control, the processor of the electronic device 200 may control the state of the transistor to control the power of the first display 220 and the second display 230, thereby controlling the display states of the first display 220 and the second display 230.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (6)

1. The utility model provides a power supply circuit for electron device, its characterized in that, electron device includes the casing and sets up respectively the first display screen and the second display screen of the both sides that back on the back of the body mutually, power supply circuit includes:
the power supply chip comprises a power supply output end, and the power supply output end is used for outputting power supply signals to the first display screen and the second display screen;
the first switch unit is connected between the power chip and the first display screen, and when the first switch unit is in a conducting state, the power signal is transmitted to the first display screen, and when the first switch unit is in a disconnecting state, the power signal is cut off and transmitted to the first display screen; and
the second switch unit is connected between the power supply chip and the second display screen, the second switch unit enables the power supply signal to be transmitted to the second display screen when being in a conducting state, and cuts off the power supply signal to be transmitted to the second display screen when being in a disconnecting state, wherein at least one of the first switch unit and the second switch unit keeps the disconnecting state;
the power supply output end of the power supply chip comprises a first output end and a second output end, the first output end is used for outputting a first voltage signal, the second output end is used for outputting a second voltage signal, and the first voltage signal is larger than the second voltage signal;
a first input end of the first display screen is electrically connected with the first output end through a first wire, a second input end of the first display screen is electrically connected with the second output end through a second wire, and the first switch unit is arranged on the first wire or the second wire;
a first input end of the second display screen is electrically connected with the first output end through a third wire, a second input end of the second display screen is electrically connected with the second output end through a fourth wire, and the second switch unit is arranged on the third wire or the fourth wire;
the power supply chip further comprises a third output end, a first control end and a second control end, wherein the third output end is used for outputting a third voltage signal, a first boost circuit, a buck circuit and a second boost circuit are arranged in the power supply chip, the first control end is electrically connected with the first boost circuit and the buck circuit, the first boost circuit is electrically connected with the first output end, the buck circuit is electrically connected with the second output end, the second control end is electrically connected with the second boost circuit, the second boost circuit is electrically connected with the third output end, the third output end is an AVDD pin of the power supply chip, the first control end is an EL _ EN pin of the power supply chip, and the second control end is an EL _ EL pin of the power supply chip;
the power supply circuit further comprises a first driving chip and a second driving chip, wherein the first driving chip and the second driving chip are electrically connected with the third output end, the first control end and the second control end, and the first driving chip and the second driving chip are used for controlling the working state of the power supply chip;
when the first switch unit is in a conducting state, the first driving chip controls the power chip to output the first voltage signal and the second voltage signal to the first display screen through the first control end, and controls the power chip to output the third voltage signal to the first driving chip through the second control end, and the second driving chip keeps not working;
when the second switch unit is in a conducting state, the second driving chip controls the power chip to output the first voltage signal and the second voltage signal to the second display screen through the first control end, controls the power chip to output a third voltage signal to the second driving chip through the second control end, and does not work.
2. The power supply circuit according to claim 1, wherein a first charge pump is disposed in the first driver chip, the first charge pump is electrically connected to the third output terminal and the first input terminal and the second input terminal of the first display screen, the first charge pump is configured to output a fourth voltage signal to the first input terminal of the first display screen and is configured to output a fifth voltage signal to the second input terminal of the first display screen;
when the first switch unit and the second switch unit are both in an off state, a first driving chip controls the first charge pump to output the fourth voltage signal and the fifth voltage signal to the first display screen through the first control end, and controls the power chip to output the third voltage signal to the first driving chip and the first charge pump through the second control end, and the second driving chip keeps out of work.
3. The power supply circuit according to claim 1, wherein a second charge pump is disposed in the second driver chip, the second charge pump is electrically connected to the third output terminal and the first input terminal and the second input terminal of the second display screen, the second charge pump is configured to output a sixth voltage signal to the first input terminal of the second display screen and is configured to output a seventh voltage signal to the second input terminal of the second display screen;
when the first switch unit and the second switch unit are both in an off state, the second driving chip controls the second charge pump to output the sixth voltage signal and the seventh voltage signal to the second display screen through the first control end, controls the power chip to output the third voltage signal to the second driving chip and the second charge pump through the second control end, and the first driving chip keeps not working.
4. The power supply circuit according to claim 1, wherein the first switching unit comprises a transistor, a gate of the transistor being electrically connected to a processor of the electronic device; and/or
The second switch unit comprises a triode, and a grid electrode of the triode is electrically connected with a processor of the electronic device.
5. An electronic device, comprising:
a housing;
the first display screen and the second display screen are respectively arranged on two opposite sides of the shell; and
the power circuit of any of claims 1-4, the power circuit electrically connecting the first display screen and the second display screen.
6. The electronic device of claim 5, wherein the housing comprises a first portion and a second portion rotatably disposed relative to the first portion, wherein the first display and the second display are each flexible displays, and wherein the first display and the second display are each disposed on the first portion and the second portion.
CN202010313946.9A 2020-04-20 2020-04-20 Power supply circuit and electronic device Active CN111431379B (en)

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Publication number Priority date Publication date Assignee Title
CN111862876B (en) * 2020-07-28 2022-07-12 Oppo广东移动通信有限公司 Double-screen power supply circuit, double-screen power supply device and electronic equipment
CN114093324B (en) * 2021-11-18 2023-05-12 广州国显科技有限公司 Driving circuit of display panel and display device

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CN108008777A (en) * 2017-12-25 2018-05-08 谢伟伟 A kind of double-screen notebook

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JP5199428B2 (en) * 2011-08-29 2013-05-15 シャープ株式会社 System including a plurality of display devices, image processing device, and control method thereof
CN104238707A (en) * 2013-06-20 2014-12-24 联想(北京)有限公司 Electronic equipment and power supplying method
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