CN111862876B - Double-screen power supply circuit, double-screen power supply device and electronic equipment - Google Patents

Double-screen power supply circuit, double-screen power supply device and electronic equipment Download PDF

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Publication number
CN111862876B
CN111862876B CN202010740493.8A CN202010740493A CN111862876B CN 111862876 B CN111862876 B CN 111862876B CN 202010740493 A CN202010740493 A CN 202010740493A CN 111862876 B CN111862876 B CN 111862876B
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power supply
display screen
display
screen
display driving
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CN111862876A (en
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邓方东
林华
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • 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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • 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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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

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  • Engineering & Computer Science (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 double-screen power supply circuit, double-screen power supply device and electronic equipment. The display device comprises a power supply, a first display driving part, a second display driving part and a main control part, wherein the first display driving part is used for being connected with a first display screen and the power supply respectively, the second display driving part is used for being connected with the first display screen, the second display screen and the power supply respectively, the main control part is connected with the power supply respectively, the first display driving part and the second display driving part are connected, and the display device is used for controlling the power supply to supply power for the first display driving part and the second display driving part when the second display screen works and the second display screen does not work and controlling the second display driving part to supply power for the first display screen. According to the power supply device, the second display driving part corresponding to the second display screen is used for supplying power to the first display screen when the first display screen with lower power consumption works and the second display screen with higher power consumption does not work, so that the cost is reduced, and the conversion efficiency of the power supply is improved.

Description

Double-screen power supply circuit, double-screen power supply device and electronic equipment
Technical Field
The present application relates to the field of power supply technologies, and in particular, to a dual-screen power supply circuit, a dual-screen power supply device, and an electronic apparatus.
Background
With the appearance of screen shapes such as a folding screen, a curling screen, a flip screen, and the like, two organic light-emitting diode (OLED) screens may appear on the same device, and at present, for a power supply mode of the two OLED screens, a conventional method is to independently supply two power supplies to the two screens. However, the area of the circuit is increased by the two power supplies, the areas of the power supplies and peripheral devices such as a power inductor are large, the heating is serious, the layout of the devices on the back side is greatly limited in front, back, left and right, the space of a mobile phone mainboard is greatly challenged, and meanwhile, the hardware cost is increased.
Disclosure of Invention
In view of the above problems, the present application provides a dual-screen power supply circuit, a dual-screen power supply device, and an electronic apparatus to solve the above problems.
In a first aspect, an embodiment of the present application provides a double-screen power supply circuit, the double-screen includes first display screen and second display screen, wherein, first display screen is less than at the power consumption of during operation of second display screen, double-screen power supply circuit includes: a power supply; the first display driving part corresponds to the first display screen and is used for being connected with the first display screen and the power supply respectively; the second display driving part corresponds to the second display screen and is used for being connected with the first display screen, the second display screen and the power supply respectively; the main control unit is respectively connected with the power supply, the first display driving unit and the second display driving unit and is used for controlling the power supply to supply power to the first display driving unit and the second display driving unit and controlling the second display driving unit to supply power to the first display screen when the first display screen works and the second display screen does not work.
Further, the power supply includes an AVDD pin, the power supply is connected to the first display driving unit and the second display driving unit through the AVDD pin, and the main control unit is configured to control the power supply to transmit AVDD signals to the first display driving unit and the second display driving unit and control the second display driving unit to transmit ELVDD signals and ELVSS signals to the first display screen when the first display screen is in operation and the second display screen is not in operation.
Further, the second display driving component includes a charge pump circuit, and the main control component is configured to control the power supply to transmit an AVDD signal to the first display driving component and the second display driving component when the first display screen is working and the second display screen is not working, so as to process the AVDD signal through the charge pump circuit of the second display driving component to obtain an ELVDD signal and an ELVSS signal, and control the second display driving component to transmit the ELVDD signal and the ELVSS signal to the first display screen.
Further, the power supply further comprises an ELVDD pin and an ELVSS pin, the power supply is configured to be connected to the second display screen through the ELVDD pin and the ELVSS pin, and the main control unit is configured to control the power supply to transmit an AVDD signal to the second display driving unit and control the power supply to transmit an ELVDD signal and an ELVSS signal to the second display screen when the first display screen does not operate and the second display screen operates.
Further, the power supply is further configured to be connected to the first display screen through the ELVDD pin and the ELVSS pin, and the main control unit is further configured to control the power supply to transmit the AVDD signal to the first display driving unit and the avss signal to the second display driving unit, and control the power supply to transmit the ELVDD signal and the ELVSS signal to the first display screen and the ELVSS signal to the second display screen, respectively, when the first display screen works and the second display screen works.
Further, the main control unit is further configured to control the power supply to supply power to the first display driving unit and control the first display driving unit to supply power to the first display screen when the first display screen operates in the AOD mode and the second display screen does not operate.
Further, the first display driving part includes a charge pump circuit, and the main control part is configured to control the power supply to transmit an AVDD signal to the first display driving part when the first display screen operates in the AOD mode and the second display screen does not operate, to process the AVDD signal by the charge pump circuit of the first display driving part to obtain an ELVDD signal and an ELVSS signal, and to control the first display driving part to transmit the ELVDD signal and the ELVSS signal to the first display screen.
Further, the main control unit is used for controlling the power supply to supply power to the first display driving unit and the second display driving unit and controlling the second display driving unit to supply power to the first display screen when the first display screen works in the AOD mode and the second display screen does not work.
Further, the area of the first display screen is smaller than that of the second display screen.
In a second aspect, an embodiment of the present application provides a dual-screen power supply device, including a first display screen, a second display screen, and the dual-screen power supply circuit, the first display screen with the first display driving component with the second display driving component is connected, the second display screen with the second display driving component is connected.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a device body and the above dual-screen power supply device, where the dual-screen power supply device is disposed on the device body.
The dual-screen power supply circuit, the dual-screen power supply device and the electronic device provided by the embodiment of the application comprise a power supply source, a first display driving part, a second display driving part and a main control part, wherein the first display driving part corresponds to the first display screen and is respectively connected with the first display screen and the power supply source, the second display driving part corresponds to the second display screen and is respectively connected with the first display screen, the second display screen and the power supply source, the main control part is respectively connected with the power supply source, the first display driving part and the second display driving part and is used for controlling the power supply source to supply power to the first display driving part and the second display driving part and controlling the second display driving part to supply power to the first display screen when the second display screen works and the second display screen does not work, therefore, when the first display screen with low power consumption works and the second display screen with high power consumption does not work, the second display driving part corresponding to the second display screen is used for supplying power to the first display screen, the cost is reduced, and the conversion efficiency of the power supply is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a block diagram of a dual-screen power supply circuit provided by an embodiment of the present application;
FIG. 2 illustrates a schematic diagram of a dual screen power supply circuit provided by one embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a supply current flow direction of the dual-screen power supply circuit shown in FIG. 2 according to an embodiment of the present application;
FIG. 4 is a schematic diagram showing a supply current flow direction of a dual-screen power supply circuit based on the dual-screen power supply circuit shown in FIG. 2 according to another embodiment of the present application;
FIG. 5 is a schematic diagram showing a supply current flow direction of a dual-screen power supply circuit based on the dual-screen power supply circuit shown in FIG. 2 according to another embodiment of the present application;
FIG. 6 is a schematic diagram of a dual screen power supply circuit provided in accordance with yet another embodiment of the present application;
FIG. 7 is a schematic diagram showing a supply current flow direction of the dual-screen power supply circuit according to an embodiment of the present application;
FIG. 8 is a schematic diagram showing a supply current flow direction of a dual-screen power supply circuit based on the dual-screen power supply circuit shown in FIG. 6 according to another embodiment of the present application;
fig. 9 shows a block diagram of a dual-screen power supply device provided in an embodiment of the present application;
fig. 10 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
The OLED display device has many advantages of self-luminescence, low driving voltage, high luminous efficiency, short response time, high definition and contrast, a viewing angle of approximately 180 °, a wide temperature range, and capability of realizing flexible display and large-area full-color display, and is considered as a display device with the most potential development in the industry.
OLED display devices generally include: the electron injection device comprises a substrate, an anode arranged on the substrate, a hole injection layer arranged on the anode, a hole transport layer arranged on the hole injection layer, a luminescent layer arranged on the hole transport layer, an electron transport layer arranged on the luminescent layer, an electron injection layer arranged on the electron transport layer and a cathode arranged on the electron injection layer. The light emitting principle of the OLED display device is that a semiconductor material and an organic light emitting material emit light under the drive of an electric field through carrier injection and recombination. Specifically, an Indium Tin Oxide (ITO) pixel electrode and a metal electrode are generally used as an anode and a cathode of the OLED display device, respectively, and under a certain voltage, electrons and holes are injected from the cathode and the anode to an electron transport layer and a hole transport layer, respectively, and the electrons and the holes migrate to a light emitting layer through the electron transport layer and the hole transport layer, respectively, and meet in the light emitting layer to form excitons and excite light emitting molecules, which emit visible light through radiative relaxation.
For the OLED display device, a driving thin film transistor for driving the organic light Emitting diode to emit light is disposed in a pixel driving circuit of the OLED display device, and in a use process, due to aging of the organic light Emitting diode and a threshold voltage shift of the driving thin film transistor, display quality of the OLED display device is degraded, so that the threshold voltage of the driving thin film transistor needs to be compensated in the use process of the OLED display device, and therefore, in order to realize control of the OLED pixel driving circuit, in addition to a SCAN Signal (SCAN) provided to a general SCAN line, more control signals such as an emission signal (EM) and the like are required.
The OLED circuit needs a main board to provide ELVDD, ELVSS, AVDD, VCI, VDDIO and DVDD power supplies, wherein the main power supplies are the ELVDD, the ELVSS and the AVDD. Specifically, ELVDD, ELVSS, and AVDD work principles: the ELVDD and ELVSS supply power to the pixel circuits of the display screen and are the main power sources for the display of the display screen. And the AVDD supplies power to the display driving control and the SCAN GOA/EM GOA/Vdata.
With the appearance of screen forms such as a folding screen, a curling screen and a flip screen, two organic light emitting diode screens can be on the same device, and at present, two power supplies independently supply two screens according to a conventional method aiming at a power supply mode of the two OLED screens. However, the area of the circuit is increased by the two power supplies, the areas of the power supplies and peripheral devices such as a power inductor are large, the heating is serious, the layout of the devices on the back side is greatly limited in front, back, left and right, the space of a mobile phone mainboard is greatly challenged, and meanwhile, the hardware cost is increased.
In view of the above problems, the inventor finds and provides the dual-screen power supply circuit, the dual-screen power supply device and the electronic device provided in the embodiment of the present application through long-term research, and when the first display screen with lower power consumption works and the second display screen with higher power consumption does not work, the second display driving part corresponding to the second display screen is used to supply power to the first display screen, so that the cost is reduced and the conversion efficiency of the power supply is improved. The specific dual-screen power supply circuit is described in detail in the following embodiments.
Referring to fig. 1, fig. 1 shows a block diagram of a dual-screen power supply circuit according to an embodiment of the present application. As shown in fig. 1, the present embodiment provides a dual-screen power supply circuit 10, where the dual-screen power supply circuit 10 includes a power supply (DC-DC IC) 100, a first display Driver (Driver IC) 200, a second display Driver (Driver IC) 300, and a main control unit 400, where the power supply 100 is respectively connected to the first display Driver 200, the second display Driver 300, and the main control unit 400 to respectively supply power to the first display Driver 200, the second display Driver 300, and the main control unit 400 is respectively connected to the power supply 100, the first display Driver 200, and the second display Driver 300 to respectively control the power supply 100, the first display Driver 200, and the second display Driver 300.
In some embodiments, the dual-screen power supply circuit 10 may be applied to a dual-screen power supply device having a dual screen, wherein the dual screen includes a first display screen and a second display screen, and the power consumption of the first display screen during operation is smaller than the power consumption of the second display screen during operation. For example, the first display screen and the second display screen are both OLED screens, the area of the first display screen is smaller than that of the second display screen, and based on the fact that the power consumption of the first display screen during working is smaller than that of the second display screen during working. For another example, the first display screen is an ink screen, the second display screen is an OLED screen, and the area of the first display screen is smaller than or equal to the area of the second display screen.
In some embodiments, the first display screen and the second display screen may function differently, and the area of the first display screen is smaller than the area of the second display screen. The second display screen is used in an unfolded state and is used as a main screen, is used conventionally, is used for watching movies, entertainment, social contact and the like, and is large in screen size and large in power consumption; the first display screen is used in a closed state of the whole machine, is small in screen size, is used for information prompt and AOD mode clock display, and is small in screen size, low in power consumption and high in cruising ability requirement.
In some embodiments, the first display driving part 200 corresponds to a first display screen, and the first display driving part 200 is configured to be connected to the first display screen and the power supply 100, respectively, and based on the connection relationship, the first display driving part 200 may receive power supplied by the power supply 100 and supply power to the first display screen based on the power supplied by the power supply 100.
In some embodiments, the second display driving part 300 corresponds to a second display screen, and the second display driving part 300 is configured to be connected to the first display screen, the second display screen, and the power supply 100, respectively, and based on the connection relationship, the second display driving part may receive the power supply from the power supply 100 and supply the power to the first display screen and/or the second display screen based on the power supply from the power supply 100.
In some embodiments, the main control unit 400 is connected to the power supply 100, the first display driving unit 200 and the second display driving unit 300, respectively, and the main control unit 400 is configured to control the power supply 100 to supply power to the first display driving unit 200 and the second display driving unit 300 and control the second display driving unit 300 to supply power to the first display screen when the first display screen is operated and the second display screen is not operated. Specifically, in this embodiment, the operation of the first display screen and the non-operation of the second display screen may include normal display of the first display screen and non-display of the second display screen, or may include display of the first display screen in an AOD mode and non-display of the second display screen, and the like, which is not limited herein. In addition, in this embodiment, when the first display screen is operated and the second display screen is not operated, the power supply 100 may be controlled to supply power to the first display driving component 200, so that the first display driving component 200 may operate normally, and the power supply 100 is controlled to supply power to the second display driving component 300, so that the second display driving component 300 supplies power to the first display screen, so that in a case where only one power supply 100 is used, the display driving component corresponding to the display screen with higher power consumption supplies power to the display screen with lower power consumption, and the power conversion efficiency is improved.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a dual-screen power supply circuit according to an embodiment of the present application. As shown in fig. 2, the power supply 100 includes an AVDD pin, an ELVDD pin, and an ELVSS pin, wherein the power supply 100 is connected to the first display driving part 200 and the second display driving part 300 through the AVDD pin, the power supply 100 is connected to the first display screen through the ELVSS pin and the ELVSS pin, and the power supply 100 is connected to the second display screen through the ELVDD pin and the ELVSS pin.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a power supply current flow direction of the dual-panel power supply circuit according to an embodiment of the present application, where a dotted line in fig. 3 indicates a current flow direction, and when the first display panel is operated and the second display panel is not operated, for example, the first display panel is in a display state and the second display panel is in a non-display state, the main control unit 400 may control the power supply 100 to transmit the AVDD signal to the first display driving unit 200 and the second display driving unit 300, and control the second display driving unit 300 to transmit the ELVDD signal and the ELVSS signal to the first display panel.
In some embodiments, with continued reference to fig. 2 and 3, the second display driving part 300 includes a charge pump circuit, when the first display screen is operated and the second display screen is not operated, for example, the first display screen is in a display state and the second display screen is in a non-display state, the main control part 400 may control the power supply 100 to transmit the AVDD signal to the first display driving part 200 and the second display driving part 300, and the charge pump circuit of the second display driving part 300 performs a conversion process on the received AVDD signal to obtain the ELVDD signal and the ELVSS signal, and transmits the ELVDD signal and the ELVSS signal to the first display screen through the second display driving part 300.
In some embodiments, when the first display screen operates in the AOD mode and the second display screen does not operate, for example, the first display screen is in a message screen display state and the second display screen is in a non-display state, the main control unit 400 may control the power supply 100 to supply power to the first display driving unit 200 and the second display driving unit 300, and control the second display driving unit 300 to supply power to the second display screen. As one way, the main control part 400 may control the power supply 100 to transmit the AVDD signal to the first display driving part 200 and the second display driving part 300 and control the second display driving part 300 to transmit the ELVDD signal and the ELVSS signal to the first display screen when the first display screen operates in the AOD mode and the second display screen does not operate. As another way, when the first display screen operates in the AOD mode and the second display screen does not operate, the main control part 400 may control the power supply 100 to transmit the AVDD signal to the first display driving part 200 and the second display driving part 300, and the charge pump circuit of the second display driving part 300 may perform conversion processing on the received AVDD signal to obtain the ELVDD signal and the ELVSS signal, and transmit the ELVDD signal and the ELVSS signal to the first display screen through the second display driving part 300.
Therefore, when the first display screen is operated and the second display screen is not operated, the second display driving part 300 corresponding to the second display screen can be used for supplying power to the first display screen. At this time, both the first display driving part 200 and the second display driving part 300 need to work, and the second display driving part 300 starts the charge pump circuit to output the ELVDD signal and the ELVSS signal to the first display screen, so that the second display driving part 300 corresponding to the second display screen supplies power to the first display screen, the power conversion efficiency is improved, and the problem of power sharing is solved.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a supply current flow direction of another embodiment of the present application based on the dual-panel power supply circuit shown in fig. 2, where a dotted line in fig. 4 indicates the current flow direction, and in some embodiments, when the first display panel is not operated and the second display panel is operated, for example, when the first display panel is in a non-display state and the second display panel is in a display state, the main control unit 400 may control the power supply 100 to supply power to the second display driving unit 300 and control the power supply 100 to supply power to the second display panel. As one way, when the first display screen does not operate and the second display screen operates, the main control part 400 may transmit an AVDD signal to the second display driving part 300 and control the power supply 100 to transmit an ELVDD signal and an ELVSS signal to the second display screen, thereby ensuring normal display of the second display screen.
Therefore, when the first display screen does not work and the second display screen works, the first display driving part 200 does not work and the second display driving part 300 works, and at this time, the AVDD pin, the ELVDD pin, and the ELVSS pin of the power supply 100 all work, wherein the ELVDD pin of the power supply 100 is conducted with the second display screen to transmit an ELVDD signal to the second display screen, the ELVSS pin of the power supply 100 is conducted with the second display screen to transmit an ELVSS signal to the second display screen, the AVDD of the power supply 100 is conducted with the second display driving part 300 to transmit an AVDD signal to the second display driving part 300, so that the power supply 100 supplies power to the second display screen to satisfy normal display of the second display screen.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a supply current flow direction of a dual-panel power supply circuit according to still another embodiment of the present application based on fig. 2, where a dotted line in fig. 5 indicates a current flow direction, and in some embodiments, when a first display panel operates and a second display panel operates, for example, when the first display panel is in a display state and the second display panel is in the display state, the main control unit 400 may control the power supply 100 to respectively supply power to the first display driving unit 200 and the second display driving unit 300, and to respectively supply power to the first display panel and the second display panel. As one mode, when the first display screen operates and the second display screen operates, the main control unit 400 may control the power supply 100 to transmit the AVDD signal to the first display driving unit 200 and the second display driving unit 300, respectively, and control the power supply 100 to transmit the ELVDD signal and the ELVSS signal to the first display screen and the second display screen, respectively, so as to ensure normal display of the first display screen and the second display screen.
Therefore, when the first display screen is operated and the second display screen is operated, the first display driving part 200 is operated and the second display driving part 300 is operated, and at this time, the AVDD pin, the ELVDD pin, and the ELVSS pin of the power supply 100 are operated, wherein, the ELVDD pin of the power supply 100 is respectively conducted with the first display screen and the second display screen to transmit ELVDD signals to the first display screen and the second display screen, the ELVSS pin of the power supply 100 is respectively conducted with the first display screen and the second display screen to transmit ELVSS signals to the first display screen and the second display screen, the AVDD pin of the power supply 100 is respectively conducted with the first display driving part 200 and the second display driving part 300 to transmit AVDD signals to the first display driving part 200 and the second display driving part 300, therefore, the power supply 100 supplies power to the first display screen and the second display screen respectively, and normal display of the first display screen and the second display screen is met.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating a dual-screen power supply circuit according to another embodiment of the present application. As shown in fig. 6, the power supply 100 includes an AVDD pin, an ELVDD pin, and an ELVSS pin, wherein the power supply 100 is connected to the first display driving part 200 and the second display driving part 300 through the AVDD pin, the power supply 100 is connected to the first display screen through the ELVDD pin and the ELVSS pin, and the power supply 100 is connected to the second display screen through the ELVDD pin and the ELVSS pin.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a flow direction of a supply current based on the dual-panel power supply circuit shown in fig. 6 according to an embodiment of the present application, where a dotted line in fig. 7 indicates the flow direction of the supply current, and when the first display panel operates in the AOD mode and the second display panel does not operate, for example, when the first display panel is in a display state of a message screen and the second display panel is in a non-display state, the main control unit 400 may supply power to the first display driving unit 200 and control the first display driving unit 200 to supply power to the first display panel. As one way, the main control part 400 may control the power supply 100 to transmit the AVDD signal to the first display driving part 200 and control the first display driving part 200 to transmit the ELVDD signal and the ELVSS signal to the first display screen when the first display screen operates in the AOD mode and the second display screen does not operate.
In some embodiments, with continued reference to fig. 6 and 7, the first display driving part 200 includes a charge pump circuit, when the first display screen operates in the AOD mode and the second display screen does not operate, for example, the first display screen is in a polyp display state and the second display screen is in a non-display state, the main control part 400 may control the power supply 100 to transmit the AVDD signal to the first display driving part 200, and the charge pump circuit of the first display driving part 200 performs a conversion process on the received AVDD signal to obtain the ELVDD signal and the ELVSS signal, and transmits the ELVDD signal and the ELVSS signal to the first display screen through the first display driving part 200.
Therefore, when the first display panel operates in the AOD mode and the second display panel does not operate, the first display driving part 200 operates and the second display driving part 300 does not operate, the ELVDD pin and the ELVSS pin of the power supply 100 do not operate, no output is generated, and the first display panel is supplied with power by the first display driving part 200. Since the first display screen has low power consumption during operation, if the power supply 100 with high output capability is used for directly supplying power, the conversion efficiency is low, the endurance is affected, and the power conversion efficiency under low current can be improved by using the first display driving part 200 for supplying power, so that the endurance is ensured.
Referring to fig. 8, fig. 8 is a schematic diagram illustrating a supply current flow direction of a dual-panel power supply circuit according to another embodiment of the present application based on fig. 6, where a dotted line in fig. 8 indicates a current flow direction, and in some embodiments, when the first display panel is not operated and the second display panel is operated, for example, when the first display panel is in a non-display state and the second display panel is in a display state, the main control unit 400 may control the power supply 100 to supply power to the second display driving unit 300 and control the power supply 100 to supply power to the second display panel. As one way, when the first display screen does not operate and the second display screen operates, the main control part 400 may transmit an AVDD signal to the second display driving part 300 and control the power supply 100 to transmit an ELVDD signal and an ELVSS signal to the second display screen, thereby ensuring normal display of the second display screen.
Therefore, when the first display screen does not work and the second display screen works, the first display driving part 200 does not work and the second display driving part 300 works, and at this time, the AVDD pin, the ELVDD pin, and the ELVSS pin of the power supply 100 all work, wherein the ELVDD pin of the power supply 100 is connected to the second display screen, the ELVDD signal is transmitted to the second display screen, the ELVSS pin of the power supply 100 is connected to the second display screen, the ELVSS signal is transmitted to the second display screen, the AVDD of the power supply 100 is connected to the second display driving part 300, and the AVDD signal is transmitted to the second display driving part 300, so that the power supply 100 supplies power to the second display screen, and normal display of the second display screen is satisfied.
Referring to fig. 9, fig. 9 is a block diagram illustrating a dual-screen power supply apparatus according to an embodiment of the present application. As shown in fig. 9, the present embodiment provides a dual-screen power supply device 20, where the dual-screen power supply device 20 includes a first display screen 21, a second display screen 22, and a dual-screen power supply circuit 10, where the dual-screen power supply circuit 10 is connected to the first display screen 21 and the second display screen 22 respectively. In one mode, the first display panel 21 is connected to the first display driving unit 200 and the second display driving unit 300, and the second display panel 22 is connected to the second display driving unit 300.
Referring to fig. 10, fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. As shown in fig. 10, the present embodiment provides an electronic device 30, where the electronic device 30 includes a device body and a dual-screen power supply device 20, where the dual-screen power supply device 20 is disposed on the device body.
In some embodiments, the electronic device 30 may also include a processor and memory.
A processor may include one or more processing cores, among others. The processor, using the various interfaces and lines to connect the various parts throughout the electronic device, performs various functions of the electronic device and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in memory, and invoking data stored in memory. Alternatively, the processor may be implemented in hardware using at least one of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor may be integrated with one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content to be displayed; the modem is used to handle wireless communications. It is to be understood that the modem may be implemented by a communication chip without being integrated into the processor.
The Memory may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). The memory may be used to store an instruction, a program, code, a set of codes, or a set of instructions. The memory may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing various method embodiments described below, and the like. The data storage area can also store data (such as a phone book, audio and video data, chatting record data) and the like created by the electronic equipment in use.
In summary, the dual-screen power supply circuit, the dual-screen power supply device and the electronic device provided in the embodiments of the present application include a power supply source, a first display driving unit, a second display driving unit and a main control unit, wherein the first display driving unit corresponds to the first display screen and is respectively connected to the first display screen and the power supply source, the second display driving unit corresponds to the second display screen and is respectively connected to the first display screen, the second display driving unit and the power supply source, the main control unit is respectively connected to the power supply source, the first display driving unit and the second display driving unit, and is configured to control the power supply source to supply power to the first display driving unit and the second display driving unit and control the second display driving unit to supply power to the first display screen when the second display screen is operated and the second display screen is not operated, therefore, when the first display screen with low power consumption works and the second display screen with high power consumption does not work, the second display driving part corresponding to the second display screen is used for supplying power to the first display screen, the cost is reduced, and the conversion efficiency of the power supply is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (11)

1. The utility model provides a double screen power supply circuit, its characterized in that, the double screen includes first display screen and second display screen, wherein, first display screen is less than at the power consumption of during operation the power consumption of second display screen at the during operation, double screen power supply circuit includes:
a power supply;
the first display driving part corresponds to the first display screen and is used for being respectively connected with the first display screen and the power supply;
the second display driving part corresponds to the second display screen and is used for being connected with the first display screen, the second display screen and the power supply respectively;
the main control unit is respectively connected with the power supply, the first display driving unit and the second display driving unit and is used for controlling the power supply to supply power to the first display driving unit and the second display driving unit and controlling the second display driving unit to supply power to the first display screen when the first display screen works and the second display screen does not work.
2. The dual-screen power supply circuit of claim 1, wherein the power supply comprises an AVDD pin, the power supply is connected to the first display driving unit and the second display driving unit through the AVDD pin, and the main control unit is configured to control the power supply to transmit AVDD signals to the first display driving unit and the second display driving unit and to control the second display driving unit to transmit ELVDD signals and ELVSS signals to the first display screen when the first display screen is in operation and the second display screen is not in operation.
3. The dual-screen power supply circuit of claim 2, wherein the second display driving part comprises a charge pump circuit, and the main control part is configured to control the power supply to transmit the AVDD signal to the first display driving part and the second display driving part when the first display screen is operated and the second display screen is not operated, so as to process the AVDD signal through the charge pump circuit of the second display driving part to obtain an ELVDD signal and an ELVSS signal, and control the second display driving part to transmit the ELVDD signal and the ELVSS signal to the first display screen.
4. The dual-screen power supply circuit as claimed in claim 2, wherein the power supply further comprises an ELVDD pin and an ELVSS pin, the power supply is configured to be connected to the second display screen via the ELVDD pin and the ELVSS pin, and the main control unit is configured to control the power supply to transmit an AVDD signal to the second display driving unit and control the power supply to transmit an ELVDD signal and an ELVSS signal to the second display screen when the first display screen is not operated and the second display screen is operated.
5. The dual-screen power supply circuit as claimed in claim 4, wherein the power supply is further configured to connect to the first display screen through the ELVDD pin and the ELVSS pin, and the main control unit is further configured to control the power supply to transmit AVDD signals to the first display driving unit and the second display driving unit, respectively, and to control the power supply to transmit ELVDD signals and ELVSS signals to the first display screen and the second display screen, respectively, when the first display screen operates and the second display screen operates.
6. The dual-screen power supply circuit of claim 2, wherein the main control unit is further configured to control the power supply to supply power to the first display driving unit and control the first display driving unit to supply power to the first display screen when the first display screen operates in the AOD mode and the second display screen does not operate.
7. The dual-screen power supply circuit of claim 6, wherein the first display driving component comprises a charge pump circuit, and the main control component is configured to control the power supply to transmit the AVDD signal to the first display driving component when the first display screen operates in the AOD mode and the second display screen does not operate, so as to obtain the ELVDD signal and the ELVSS signal by processing the AVDD signal through the charge pump circuit of the first display driving component, and control the first display driving component to transmit the ELVDD signal and the ELVSS signal to the first display screen.
8. The dual-screen power supply circuit according to any one of claims 1-5, wherein the main control unit is configured to control the power supply to supply power to the first display driving unit and the second display driving unit, and control the second display driving unit to supply power to the first display screen when the first display screen operates in the AOD mode and the second display screen does not operate.
9. The dual screen power supply circuit of any one of claims 1-5 wherein the area of the first display screen is smaller than the area of the second display screen.
10. A dual-screen power supply device, comprising a first display screen, a second display screen and the dual-screen power supply circuit of any one of claims 1 to 9, wherein the first display screen is connected to the first display driving unit and the second display driving unit, and the second display screen is connected to the second display driving unit.
11. An electronic apparatus, comprising an apparatus body and the dual-screen power supply device according to claim 10, wherein the dual-screen power supply device is provided on the apparatus body.
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