CN114093324B - Driving circuit of display panel and display device - Google Patents

Driving circuit of display panel and display device Download PDF

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Publication number
CN114093324B
CN114093324B CN202111370785.8A CN202111370785A CN114093324B CN 114093324 B CN114093324 B CN 114093324B CN 202111370785 A CN202111370785 A CN 202111370785A CN 114093324 B CN114093324 B CN 114093324B
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power
control switch
driving circuit
input end
power supply
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CN114093324A (en
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贾琼
党鹏乐
唐韬
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Guangzhou Guoxian Technology Co Ltd
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Guangzhou Guoxian Technology Co 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
    • 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]
    • G09G3/3225—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] using an active matrix
    • 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
    • G09G2330/021—Power management, e.g. power saving

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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)
  • Control Of El Displays (AREA)

Abstract

The application discloses display panel's drive circuit and display device, wherein, this display panel's drive circuit is used for in display panel's the screen mode of calming the screen down, and the part luminescence unit of drive display panel is luminous, and this drive circuit includes: the first power supply input end is used for being connected with a first voltage source of the system; the first power supply output end is used for being connected with the first power supply end of the light-emitting unit; the second power supply input end is used for connecting a second voltage source of the system; the second power supply output end is used for being connected with the second power supply end of the light-emitting unit and corresponds to the second power supply input end; the first end of the first control switch is connected with the first power input end; the voltage stabilizer is connected in series between the second end of the first control switch and the first power supply output end; the voltage input by the first power input end is higher than the voltage input by the second power input end. Through the mode, the power consumption of the display panel in the screen-off mode is effectively reduced.

Description

Driving circuit of display panel and display device
Technical Field
The present disclosure relates to display panel technologies, and in particular, to a driving circuit of a display panel and a display device.
Background
With the continuous development of Active-matrix organic light-emitting diode (AMOLED) display technology, the functions of the AMOLED display panel are becoming more and more abundant and diversified, for example, the AMOLED display panel can enter a screen-in display (Always On Display, AOD) mode in a locked state, so that a partial area of the display panel can keep information such as a normally-bright display time, and the use of a user is facilitated.
However, in the locked state, after the AMOLED display panel enters the AOD display mode, a part of the area still remains in the display state, and another part of the area remains in the non-display state, which saves a lot of power consumption compared with the LCD (Liquid Crystal Display ). However, after the AMOLED display panel enters the AOD display mode, the current required to be used in the partial area still required to keep the display state is relatively low, and at this time, the power is supplied by using an external power supply, so that most of power consumption is mainly consumed in each electronic device of the power supply.
Disclosure of Invention
The technical problem that this application mainly solves is to provide a display panel's drive circuit and display device, can solve the display panel among the prior art and put into the back of screen mode of turning on the display, the higher problem of consumption.
In order to solve the technical problems, one technical scheme adopted by the application is as follows: there is provided a driving circuit of a display panel for driving a part of light emitting units of the display panel to emit light in a screen-off mode of the display panel, wherein the driving circuit includes: the first power supply input end is used for being connected with a first voltage source of the system; the first power supply output end is used for being connected with the first power supply end of the light-emitting unit; the second power supply input end is used for connecting a second voltage source of the system; the second power supply output end is used for being connected with the second power supply end of the light-emitting unit and corresponds to the second power supply input end; the first end of the first control switch is connected with the first power input end; the voltage stabilizer is connected in series between the second end of the first control switch and the first power supply output end; the voltage stabilizer, the first control switch, the second power input end and the second power output end are not coupled, and the voltage input by the first power input end is higher than the voltage input by the second power input end.
Wherein the driving circuit further comprises: the third power supply input end is used for connecting a third voltage source of the system; the second control switch is connected in series between the third power input end and the first end of the voltage stabilizer; the second control switch is not coupled with the second power input end and the second power output end.
Wherein the driving circuit further comprises: the third control switch is connected in series between the second end of the voltage stabilizer and the first power supply output end; the third control switch is not coupled with the second power input end and the second power output end.
When the driving circuit inputs power through a first voltage source, the first control switch is turned on, and the second control switch is turned off; or when the driving circuit inputs power through the third voltage source, the second control switch is turned on, and the first control switch is turned off.
Wherein the driving circuit further comprises: the fourth power supply input end is used for connecting a fourth voltage source of the system; the fourth control switch is connected in series between the fourth power input end and the first end of the voltage stabilizer; the fourth control switch is not coupled with the second power input end and the second power output end.
The first power input end, the third power input end and the fourth power input end are respectively different in input voltage, and the first power input end, the third power input end and the fourth power input end are respectively higher than the second power input end in input voltage.
When the driving circuit inputs power through a first voltage source, the first control switch is turned on, the second control switch is turned off, and the fourth control switch is turned off; or when the driving circuit inputs a power supply through the second voltage source, the first control switch is turned on, the second control switch is turned off, and the fourth control switch is turned off; or when the driving circuit inputs power through the fourth voltage source, the fourth control switch is turned on, the first control switch is turned off, and the second control switch is turned off.
The driving circuit further comprises a fifth control switch, wherein the fifth control switch is connected in series between the second power input end and the second power output end, and is not coupled with the first power input end and the first power output end.
The voltage of the second power input end is the grounding voltage.
In order to solve the technical problem, another technical scheme adopted by the application is as follows: there is provided a display device, wherein the display device comprises a display panel and a driving circuit as claimed in any one of the above, the driving circuit is electrically connected to the display panel, and is used for driving part of the light emitting units of the display panel to emit light in a screen-off mode of the display panel.
The beneficial effects of this application are: in contrast to the prior art, the present application provides a driving circuit of a display panel for driving a part of light emitting units of the display panel to emit light in a screen-off mode of the display panel, the driving circuit comprising: the power supply comprises a first power supply input end, a first power supply output end, a second power supply input end, a second power supply output end, a voltage stabilizer and a first control switch; the first power input end and the second power input end are used for acquiring corresponding power signals through a first voltage source and a second voltage source of the system, and then the power signals can be sent to the first power output end and the second power output end through the voltage stabilizer and the first control switch so as to be output to the light-emitting unit. Therefore, the power consumption of the display panel in the screen-off mode can be effectively reduced by simplifying the composition of the power consumption electronic devices integrated in the driving circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic diagram of a driving circuit of a display panel in the prior art;
FIG. 2 is a schematic diagram of a first embodiment of a driving circuit of the present application;
FIG. 3 is a schematic diagram of a second embodiment of the driving circuit of the present application;
FIG. 4 is a schematic diagram of a third embodiment of a driving circuit of the present application;
FIG. 5 is a schematic diagram of a third embodiment of a driving circuit of the present application;
fig. 6 is a schematic structural diagram of an embodiment of a display device of the present application.
Detailed Description
The inventor finds that with the continuous development of the AMOLED display technology, the functions of the AMOLED display panel are more and more abundant and diversified, wherein the AMOLED display panel can enter an AOD mode in a locking state, so that the partial area of the display panel can keep information such as normal bright display time and the like, and the AMOLED display panel is convenient for users to use.
However, in the locked state, after the AMOLED display panel enters the AOD display mode, a part of the area still remains in the display state, and another part of the area remains in the non-display state. However, after the AMOLED display panel enters the AOD display mode, the current required to be used in the partial area still required to keep the display state is relatively low, and at this time, the power supply by using the external power supply may cause most of the power consumption to be mainly consumed in each electronic device of the driving power supply.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a driving circuit of a display panel in the prior art. It is known that the display driver IC (Integrated Circuit ) in the prior art display panel AOD mode uses a charge pump for voltage conversion, and in order to reduce power consumption, it is common to supply power to OVDD, OVSS through the display driver IC in the AOD mode. And specifically, the AVDD generates the OVDD through the linear voltage stabilizer, and VDDI is a digital supply voltage for supplying power to the crystal oscillator pulse circuit, and the crystal oscillator pulse circuit generates a control pulse logic signal to control the charge pump, so that the AVDD generates the AVEE through the charge pump under the control of VDDI, and the AVEE generates the OVSS through the linear voltage stabilizer.
It is understood that AVDD and VDDI are input power supplies corresponding to analog circuits and digital circuits in the display panel, respectively, and here correspond to input power supplies of the display driving ICs in the AOD mode. And OVDD and OVSS correspond to power output terminals of the light emitting unit in AOD mode for output of the display drive IC.
The display driving IC is a main part of a display screen imaging system, is integrated with a resistor, a regulator, a comparator, a power transistor and other components, comprises an LCD module and a display subsystem, and is responsible for driving a display, controlling driving current and other functions.
A charge pump, also called a switched capacitor voltage converter, is a DC-DC (direct current to direct current converter) that uses so-called "flying" or "pumping" capacitors (rather than inductors or transformers) to store energy.
The linear regulator uses a transistor or FET (Field Effect Transistor ) operating in its linear region to subtract excess voltage from the applied input voltage, producing a regulated output voltage. The product is packaged in a small size, has excellent performance, provides value-added characteristics such as thermal overload protection and safe current limiting, and can greatly reduce power consumption in a disconnection mode.
Some electronic devices require an ac signal with a high degree of frequency stability, while LC oscillators are less stable and tend to drift in frequency (i.e., the frequency of the ac signal produced tends to vary). A special element is used in the oscillator: quartz crystals, which can produce highly stable signals, are known as crystal oscillators, i.e. crystal oscillators.
Therefore, the OVDD generated by the display driving IC in fig. 1 has many related blocks of OVSS voltage, which results in larger power consumption, especially in the aspect of crystal oscillator, the pulse control signal is required to be continuously generated, so that the power consumption of the display driving IC in the AOD mode is greatly improved. However, for the display panel in the AOD mode, only a small amount of information needs to be displayed, and only the display is performed under the screen, so that the key technical parameter is the power consumption performance.
In order to effectively reduce power consumption of a display panel in an AOD mode, the application provides a driving circuit of the display panel and a display device. The present application is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustration of the present application, but do not limit the scope of the present application. Likewise, the following embodiments are only some, but not all, of the embodiments of the present application, and all other embodiments obtained by one of ordinary skill in the art without making any inventive effort are within the scope of the present application.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a first embodiment of a driving circuit of the present application.
In this embodiment, the driving circuit 10 specifically includes a first power input terminal 11 and a second power input terminal 13, so as to be capable of being connected to a first voltage source and a second voltage source in a power supply system of the display panel, respectively, and acquiring corresponding power signals through the first voltage source and the second voltage source; and the driving circuit 10 further includes a first power output terminal 12 and a second power output terminal 14, which are connected to the first power terminal and the second power terminal of the light emitting unit, respectively, and correspond to the first power input terminal 11 and the second power input terminal 13, respectively.
The light emitting unit herein is a partial area of the display panel that needs to emit light in the screen-off mode, so that the light emitting unit can emit light after acquiring power through the first power output terminal 12 and the second power output terminal 14. It should be noted that, the first power supply terminal and the second power supply terminal of the light emitting unit specifically correspond to the positive electrode and the negative electrode of the light emitting unit, respectively.
Further, the driving circuit 10 further includes a first control switch 15 and a voltage stabilizer 16, and a first end of the first control switch 15 is connected to the first power input end 11, so as to control on-off of a power signal correspondingly output from the first power output end 12 to the light emitting unit, thereby realizing real-time control of light emitting timing of the light emitting unit.
The voltage regulator 16 is specifically connected in series between the second end of the first control switch 15 and the first power output end 12, so as to regulate the power signal of the first voltage source input by the first power input end 11, for example, subtract the excess voltage from the input voltage of the power signal, generate the regulated output voltage, subtract the excess voltage from the applied input voltage, generate the regulated output voltage, and provide the added value characteristics of thermal overload protection, safe current limiting, and the like.
The voltage stabilizer 16, the first control switch 15, the second power input terminal 13 and the second power output terminal 14 are not coupled, but are correspondingly formed into two independent power supply loops, and the voltage input by the first power input terminal 11 is higher than the voltage input by the second power input terminal 13, so that a potential difference can be correspondingly formed at the first power output terminal 12 and the second power output terminal 14, and the corresponding light emitting units can be powered.
According to the scheme, the power consumption of the display panel in the screen-off mode can be effectively reduced by simplifying the composition of the power consumption electronic devices integrated in the driving circuit 10.
In an embodiment, the driving circuit 10 further includes a fifth control switch 17, and the fifth control switch 17 is specifically connected in series between the second power input terminal 13 and the second power output terminal 14, and is not coupled to the first power input terminal 11 and the first power output terminal 12, so as to form two independent power supply loops respectively, and can perform on-off control on the power supply loop of the second voltage source through the fifth control switch 17. In other embodiments, the second power input terminal 13 may be directly electrically connected to the second power output terminal 14 through a conductive wire, and the on-off control of the corresponding light emitting unit is implemented by the first control switch 15, which is not limited in this application.
Optionally, the voltage of the second power input terminal 13, that is, the second voltage source is specifically a ground voltage, and the second power output terminal 14 is specifically electrically connected to the second power input terminal 13, so as to be further connected to the ground GND of the system power supply.
Optionally, the voltage input by the first power input terminal 11 is lower than the highest supply voltage of the display panel power system, so as to ensure the safety of power supply and lower power consumption.
Alternatively, the first voltage source may specifically correspond to AVDD, VDDI or VCI, and preferably VDDI or VCI, while the second voltage source is a 0 potential source, i.e. ground GND.
The AVDD, VDDI and VCI are input power sources corresponding to analog circuits, digital circuits and analog power sources of the display driving unit, respectively, in the display panel, and the input voltage level of AVDD is greater than that of VCI, and the input voltage level of VCI is greater than that of VDDI, that is, the voltage of the first power input terminal 11 input by the first voltage source is lower than the highest supply voltage AVDD of the power source system of the display panel, so as to reduce the power consumption of the display panel in the idle screen mode. In other embodiments, the first voltage source may also correspond to AVDD and may be regulated by the voltage regulator 16, which is not limited in this application.
It will be appreciated that when VDDI or VCI is used as the first voltage source, the output losses at the first power supply output 12 and the second power supply output 14 will correspondingly be reduced; when AVDD is used as the first voltage source, however, only the output loss of the first power supply output 12 will be reduced, i.e. the first voltage source is preferably VDDI or VCI.
Alternatively, the output voltage levels of the voltage sources corresponding to AVDD, VDDI and VCI are 6V, 1.5V and 3V, respectively, and AVDD corresponds to the 6V voltage output to the voltage regulator 16, and after voltage limitation by the voltage regulator 16, the voltage can be output as 3V.
Optionally, the first control switch 15 is a P-type transistor or an N-type transistor, so as to correspondingly realize on-off control of power supply of the light emitting unit.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a second embodiment of the driving circuit of the present application. The driving circuit in this embodiment differs from the first embodiment of the driving circuit provided in fig. 2 in that the driving circuit 20 further comprises a third power input 28 and a second control switch 29.
The first power input end 21, the first power output end 22, the second power input end 23, the second power output end 24, the voltage stabilizer 26, the first control switch 25 and the fifth control switch 27 are respectively identical to the first power input end 11, the first power output end 12, the second power input end 13, the second power output end 14, the voltage stabilizer 16, the first control switch 15 and the fifth control switch 17, and detailed descriptions thereof are omitted herein with reference to fig. 2.
Specifically, the third power input terminal 28 is used for connecting to a third voltage source of the display panel power system, and the second control switch 29 is specifically connected in series between the third power input terminal 28 and the first terminal of the voltage regulator 16, and the second control switch 29 is not coupled to both the second power input terminal 23 and the second power output terminal 24.
Wherein, when the driving circuit 20 inputs power through the first voltage source, the first control switch 25 will remain on, and the second control switch 29 is off; while the second control switch 29 will remain on and the first control switch 25 will be off when the drive circuit 20 is powered by the third voltage source.
It will be appreciated that the first control switch 25 and the second control switch 29 cannot be turned on simultaneously, so that the first voltage source and the third voltage source can be gated by the first control switch 25 and the second control switch 29, so as to ensure that the corresponding light emitting units can be powered by the first voltage source or the third voltage source at the same time.
The on and off of the first control switch 25, the second control switch 29 and the fifth control switch 27 may be controlled by a processor in the display panel.
Alternatively, the first voltage source and the third voltage source may specifically correspond to any two of AVDD, VDDI and VCI, respectively, and preferably VDDI and VCI, while the second voltage source is a 0 potential source, i.e. ground GND.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a third embodiment of the driving circuit of the present application. The driving circuit in this embodiment is different from the second embodiment of the driving circuit provided in fig. 3 in that the driving circuit 30 further includes a third control switch 310.
The first power input terminal 31, the first power output terminal 32, the second power input terminal 33, the second power output terminal 34, the voltage stabilizer 36, the first control switch 35 and the fifth control switch 37 are respectively identical to the first power input terminal 21, the first power output terminal 22, the second power input terminal 23, the second power output terminal 24, the voltage stabilizer 26, the first control switch 25 and the fifth control switch 27, and detailed descriptions thereof are omitted herein with reference to fig. 3.
Specifically, the third control switch is connected in series between the second end of the voltage stabilizer and the first power output end, so as to control on-off of the power signal correspondingly output to the light emitting unit from the first power output end 12, thereby realizing real-time control of the light emitting time of the light emitting unit. And the third control switch is not coupled with the second power input end and the second power output end.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a fourth embodiment of the driving circuit of the present application. The driving circuit in this embodiment is different from the third embodiment of the driving circuit provided in fig. 4 in that the driving circuit 40 further includes a fourth power input 411 and a fourth control switch 412.
The first power input terminal 41, the first power output terminal 42, the second power input terminal 43, the second power output terminal 44, the third power input terminal 48, the voltage stabilizer 46, the first control switch 45, the second control switch 49, the third control switch 410 and the fifth control switch 47 are respectively identical to the first power input terminal 31, the first power output terminal 32, the second power input terminal 33, the second power output terminal 34, the third power output terminal 28, the voltage stabilizer 36, the first control switch 35, the second control switch 39, the third control switch 310 and the fifth control switch 37, and detailed descriptions thereof are omitted herein.
Specifically, the fourth power input 411 is used for connecting to a fourth voltage source of the display panel power system, and the fourth control switch 412 is connected in series between the fourth power input 411 and the first end of the voltage regulator 46, and the fourth control switch 412 is not coupled to the second power input 43 and the second power output 44.
The voltages respectively input to the first power input terminal 41, the third power input terminal 48 and the fourth power input terminal 411 are different, and the voltages respectively input to the first power input terminal 41, the third power input terminal 48 and the fourth power input terminal 411 are higher than the voltages input to the second power input terminal 43.
When the driving circuit 40 inputs power through the first voltage source, the first control switch 45 will remain on, the second control switch 49 is off, and the fourth control switch 412 is off; when the driving circuit 40 inputs power through the third voltage source, the second control switch 49 will remain on, the first control switch 45 is turned off, and the fourth control switch 412 is turned off; when the driving circuit 40 inputs power through the fourth voltage source, the fourth control switch 412 will remain on, while the first control switch 45 is turned off and the second control switch 49 is turned off.
That is, the first control switch 45, the second control switch 49 and the fourth control switch 412 cannot be turned on at the same time, so that the first voltage source, the third voltage source and the fourth voltage source can be gated through the first control switch 45, the second control switch 49 and the fourth control switch 412 to ensure that the corresponding light emitting units can be powered by the first voltage source or the third voltage source or the fourth voltage source at the same time.
Alternatively, the first voltage source, the third voltage source and the fourth voltage source may specifically correspond to any sequential combination of AVDD, VDDI and VCI, respectively, and the second voltage source is a 0-potential source, that is, the ground GND.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of a display device of the present application.
In this embodiment, the display device 50 includes a display panel 51 and a driving circuit 52, and the driving circuit 52 is electrically connected to the display panel 51 for driving a part of the light emitting units of the display panel 51 to emit light in a screen-off mode of the display panel 51. Note that, the driving circuit 52 described in this embodiment is the driving circuit 10, the driving circuit 2, the driving circuit 30, or the driving circuit 40 described in any one of the above embodiments, and will not be described herein again.
The beneficial effects of this application are: in contrast to the prior art, the driving circuit of the display panel provided in the present application is used for driving a part of light emitting units of the display panel to emit light in a screen-off mode of the display panel, and the driving circuit includes: the power supply comprises a first power supply input end, a first power supply output end, a second power supply input end, a second power supply output end, a voltage stabilizer and a first control switch; the first power input end and the second power input end are used for acquiring corresponding power signals through a first voltage source and a second voltage source of the system, and then the power signals can be sent to the first power output end and the second power output end through the voltage stabilizer and the first control switch so as to be output to the light-emitting unit. Therefore, the power consumption of the display panel in the screen-off mode can be effectively reduced by simplifying the composition of the power consumption electronic devices integrated in the driving circuit.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (6)

1. A driving circuit of a display panel for driving a part of light emitting units of the display panel to emit light in a screen-off mode of the display panel, the driving circuit comprising:
the first power supply input end is used for being connected with a first voltage source of the system, and the first voltage source is VCI or VDDI;
the first power supply output end is used for being connected with the first power supply end of the light-emitting unit;
the second power supply input end is used for being connected with a second voltage source of the system, and the second voltage source is a 0 potential source;
the second power supply output end is used for being connected with the second power supply end of the light-emitting unit and corresponds to the second power supply input end;
the first end of the first control switch is connected with the first power input end;
the voltage stabilizer is connected in series between the second end of the first control switch and the first power supply output end;
the voltage stabilizer, the first control switch, the second power input end and the second power output end are not coupled, and the voltage input by the first power input end is higher than the voltage input by the second power input end;
the third power supply input end is used for connecting a third voltage source of the system;
the second control switch is connected in series between the third power input end and the first end of the voltage stabilizer;
wherein the second control switch is uncoupled from both the second power input and the second power output;
the third control switch is connected in series between the second end of the voltage stabilizer and the first power supply output end;
wherein the third control switch is uncoupled from both the second power input and the second power output;
the fourth power supply input end is used for connecting a fourth voltage source of the system;
the fourth control switch is connected in series between the fourth power input end and the first end of the voltage stabilizer;
the fourth control switch is not coupled with the second power input end and the second power output end.
2. The driving circuit according to claim 1, wherein,
when the driving circuit inputs power through the first voltage source, the first control switch is turned on, and the second control switch is turned off;
or when the driving circuit inputs power through the third voltage source, the second control switch is turned on, and the first control switch is turned off.
3. The driving circuit according to claim 1, wherein,
the voltages respectively input by the first power input end, the third power input end and the fourth power input end are different, and the voltages respectively input by the first power input end, the third power input end and the fourth power input end are higher than the voltages input by the second power input end.
4. The driving circuit according to claim 1, wherein,
when the driving circuit inputs a power supply through the first voltage source, the first control switch is turned on, the second control switch is turned off, and the fourth control switch is turned off;
or when the driving circuit inputs a power supply through the third voltage source, the second control switch is turned on, the first control switch is turned off, and the fourth control switch is turned off;
or when the driving circuit inputs power through the fourth voltage source, the fourth control switch is turned on, the first control switch is turned off, and the second control switch is turned off.
5. The driving circuit according to any one of claims 1 to 4, wherein,
the driving circuit further comprises a fifth control switch which is connected in series between the second power input end and the second power output end and is not coupled with the first power input end and the first power output end.
6. A display device, characterized in that the display device comprises a display panel and the driving circuit according to any one of claims 1-5, the driving circuit being electrically connected to the display panel for driving part of the light emitting units of the display panel to emit light in a screen-off mode of the display panel.
CN202111370785.8A 2021-11-18 2021-11-18 Driving circuit of display panel and display device Active CN114093324B (en)

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KR101716781B1 (en) * 2010-08-20 2017-03-16 삼성디스플레이 주식회사 Display apparatus and method of providing power thereof
KR20130140445A (en) * 2012-06-14 2013-12-24 삼성디스플레이 주식회사 Display device, power control device and driving method thereof
KR102485165B1 (en) * 2015-08-21 2023-01-09 삼성디스플레이 주식회사 Display device and method for driving thereof
CN205945737U (en) * 2016-08-24 2017-02-08 泰利美信（苏州）医疗科技有限公司 NFC chip with power management module
KR102548467B1 (en) * 2017-12-04 2023-06-29 삼성디스플레이 주식회사 Dc-dc converter and display device having the same
KR20210127582A (en) * 2020-04-14 2021-10-22 삼성전자주식회사 Display driving circuit
CN111431379B (en) * 2020-04-20 2021-04-23 Oppo广东移动通信有限公司 Power supply circuit and electronic device
CN111883042B (en) * 2020-07-31 2023-06-23 维信诺科技股份有限公司 Display panel and display device

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