WO2021164650A1 - 显示面板的驱动方法、其驱动电路及显示装置 - Google Patents

显示面板的驱动方法、其驱动电路及显示装置 Download PDF

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Publication number
WO2021164650A1
WO2021164650A1 PCT/CN2021/076246 CN2021076246W WO2021164650A1 WO 2021164650 A1 WO2021164650 A1 WO 2021164650A1 CN 2021076246 W CN2021076246 W CN 2021076246W WO 2021164650 A1 WO2021164650 A1 WO 2021164650A1
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Prior art keywords
circuit
display
picture
displayed
voltage
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PCT/CN2021/076246
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English (en)
French (fr)
Inventor
刘媛媛
乔玄玄
邢振周
张晓哲
***
Original Assignee
京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Priority to US17/781,203 priority Critical patent/US11663988B2/en
Publication of WO2021164650A1 publication Critical patent/WO2021164650A1/zh

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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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user

Definitions

  • the present disclosure relates to the field of display technology, in particular to a driving method of a display panel, its driving circuit and a display device.
  • an external voltage source can be used to provide a reference voltage for power supply, and the reference voltage is converted by a driving circuit to obtain a driving signal required for driving the display panel.
  • the LCD panel displays large power consumption screens, due to insufficient loading capacity, the LCD panel will have a black screen or abnormal picture.
  • the embodiment of the present disclosure provides a driving method of a display panel, including:
  • the first reference voltage provided by the external voltage source is amplified into a second reference voltage, and the second reference voltage is provided to the touch screen of the display panel.
  • the first reference voltage is provided to the touch and display integrated circuit and the power management circuit of the display panel.
  • the data parameters corresponding to the high power consumption display screen set for the display panel and the data of the to-be-displayed screen are Signal to determine whether the picture to be displayed belongs to the high power consumption display picture, which specifically includes:
  • the data of the display screen to be displayed according to the data parameters corresponding to the high power consumption display screen set for the display panel Signal to determine whether the picture to be displayed belongs to the high power consumption display picture and further includes:
  • the data signal of the picture to be displayed does not include the data parameter corresponding to the high power consumption display picture, or when it is determined that the data signal of the picture to be displayed corresponds to the data parameter of the high power consumption display picture.
  • the proportion is less than the preset value, it is determined that the picture to be displayed belongs to the low-power display picture.
  • the preset value is greater than 50%.
  • the method further includes:
  • the power management circuit processes the received first reference voltage or the second reference voltage, and provides the processed voltages to the touch and display integrated circuit and the gate drive circuit, respectively.
  • the power management circuit processes the received first reference voltage or the second reference voltage, and processes The latter voltages are respectively provided to the touch and display integrated circuit and the gate drive circuit, which specifically include:
  • the power management circuit obtains the corresponding display panel gate on-state voltage, display panel gate off-state voltage, display panel source positive analog voltage, and The display panel source negative analog voltage, and the display panel gate on-state voltage and the display panel gate off-state voltage are provided to the gate driving circuit, and the display panel source positive analog voltage and the display The analog voltage of the negative electrode of the panel source is provided to the touch and display integrated circuit.
  • the present disclosure implements and provides a drive circuit for a display panel, including: a voltage processing circuit, an image detection circuit, a power management circuit, a touch and display integrated circuit, and a gate drive circuit;
  • the picture detection circuit is configured to obtain the data signal of the picture to be displayed, and determine the data signal of the picture to be displayed according to the data parameter corresponding to the high power consumption display picture set for the display panel and the data signal of the picture to be displayed Whether the screen belongs to the high-power display screen, when it is determined that the to-be-displayed screen belongs to the high-power display screen, a first control signal is provided to the voltage processing circuit, and when it is determined that the to-be-displayed screen belongs to the low-power display When the display screen is consumed, providing a second control signal to the voltage processing circuit;
  • the voltage processing circuit is configured to receive a first reference voltage provided by an external voltage source, and upon receiving the first control signal, convert the first reference voltage into a second reference voltage, and convert the second reference voltage
  • the reference voltage is provided to the power management circuit and the touch and display integrated circuit, and when the second control signal is received, the first reference voltage is provided to the power management circuit and the touch and display integrated circuit. Display integrated circuit; wherein, the second reference voltage is greater than the first reference voltage;
  • the power management circuit is configured to receive the first reference voltage or the second reference voltage provided by the voltage processing circuit, and after processing the first reference voltage or the second reference voltage, The subsequent voltages are respectively provided to the touch and display integrated circuit and the gate driving circuit.
  • the picture detection circuit includes: a preset picture detection sub-circuit and a display picture determination sub-circuit;
  • the preset picture detection sub-circuit is configured to determine whether the data signal of the picture to be displayed includes the high power consumption according to the data parameter corresponding to the high power consumption display picture and the data signal of the picture to be displayed Display the data parameters corresponding to the screen;
  • the display picture determining sub-circuit is configured to determine the high power consumption display in the data signal of the picture to be displayed when it is determined that the data signal of the picture to be displayed includes the data parameter corresponding to the high power consumption display picture. Whether the proportion of the data parameter corresponding to the screen is greater than the preset value, and when the proportion is greater than the preset value, it is determined that the to-be-displayed screen belongs to the high-power display screen;
  • the data signal of the picture to be displayed does not include the data parameter corresponding to the high power consumption display picture, or when it is determined that the data signal of the picture to be displayed corresponds to the data parameter of the high power consumption display picture.
  • the proportion is less than the preset value, it is determined that the picture to be displayed belongs to the low-power display picture.
  • the preset value is greater than 50%.
  • the voltage processing circuit includes: a first switch control sub-circuit, a second switch control sub-circuit, and an amplifying sub-circuit;
  • the input terminal of the first switch control sub-circuit is electrically connected to the external voltage source, and the output terminal of the first switch control sub-circuit is electrically connected to the power management circuit and the touch and display integrated circuit, respectively;
  • the first switch control sub-circuit is configured to be turned off under the control of the first control signal, and turned on under the control of the second control signal;
  • the input end of the second switch control sub-circuit is electrically connected to the external voltage source, the output end of the second switch control sub-circuit is electrically connected to the input end of the amplifying sub-circuit, and the output of the amplifying sub-circuit is Terminals are respectively electrically connected to the power management circuit and the touch and display integrated circuit;
  • the second switch control sub-circuit is configured to be turned on under the control of the first control signal, and turned off under the control of the second control signal;
  • the amplifying sub-circuit is configured to receive the first reference voltage when the second switch control sub-circuit is turned on, perform amplifying processing on the first reference voltage to obtain a second reference voltage, and convert the second reference voltage to Two reference voltages are respectively provided to the power management circuit and the touch and display integrated circuit.
  • the power management circuit includes: a first voltage conversion sub-circuit and a second voltage conversion sub-circuit;
  • the first voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained analog voltage of the positive electrode of the display panel and the analog voltage of the negative electrode of the display panel to all The touch and display integrated circuit;
  • the second voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained display panel gate on-state voltage and display panel gate off-state voltage to all The gate drive circuit.
  • embodiments of the present disclosure also provide a display device, including the driving circuit provided in any one of the embodiments of the second aspect, and a liquid crystal display panel electrically connected to the driving circuit.
  • FIG. 1 is a schematic structural diagram of a driving circuit of a display panel in the related art
  • Figure 2 is a schematic diagram of data parameters when the display panel displays a low-power picture
  • Figure 3 is a schematic diagram of data parameters when the display panel displays a large power consumption screen
  • FIG. 4 is a schematic flowchart of a driving method of a display panel provided by an embodiment of the disclosure.
  • FIG. 5 is a schematic diagram of a circuit structure of a driving circuit of a display panel provided by an embodiment of the disclosure.
  • FIG. 6 is a schematic diagram of a circuit structure of a voltage processing circuit provided by an embodiment of the disclosure.
  • the thickness of the display panel can be greatly reduced, and the touch and display driver integration (TDDI) The cost of the driving circuit can be saved.
  • the power required by the drive circuit is generated internally by the master TDDI chip, such as VGH/VGL/AVDDP/AVDDN. Due to the limited power supply current generated by the chip, this method It is only suitable for small size and small resolution, that is, the use of panels with small maximum power consumption.
  • the other is that the power required by the drive circuit is generated by an external power management circuit.
  • the voltage and current generated by the power management circuit are larger than the current generated inside the TDDI chip. It is suitable for large-size and large-resolution LCD panels, such as 12.8FHD ( 1920*1080) TDDI display panel adopts this kind of power supply mode.
  • the power supplied by the external voltage source to the display panel is usually only the power voltage VDD, so other voltages required by the driving circuit need to be converted by the VDD voltage, and this conversion process is completed inside the power management circuit.
  • the drive circuit includes: a power management circuit, a touch and display integrated circuit, and a gate drive circuit.
  • the external voltage source provides the reference signal VDD to the power management circuit and the touch and display integrated circuit, respectively.
  • the circuit converts the VDD signal into the display panel gate on-state voltage VGH, the display panel gate off-state voltage VGL, the display panel source positive analog voltage AVDDP, and the display panel source negative analog voltage AVDDN, and provides VGH and VGL voltages
  • the AVDDP and AVDDN voltages are provided to the touch and display integrated circuit to drive the display panel to work.
  • the touch and display integrated circuits need to drive the display panel and the touch panel at the same time.
  • both of the driving circuits are load circuits.
  • This load circuit has a heavier load than an ordinary display panel, that is, theoretically, the load capacity of the power supply voltage should be stronger.
  • the external voltage source requires a more complicated circuit to increase the load capacity of the power supply voltage, and the cost of the external voltage source will also increase, in actual use, the load capacity of the external voltage source is usually insufficient. Therefore, it often appears in the high power consumption screen, the display panel appears black or the picture is different.
  • power consumption is related to the amplitude switching frequency and amplitude of the signal loaded on the data line.
  • one data line controls a column of pixels, and the more pixels in the column of pixels with different gray levels, the greater the switching frequency of the amplitude of the data line.
  • the above is only a 1 dot 255 screen as an example to illustrate the high power consumption screen.
  • the determined high power consumption screens will also be different. Those skilled in the art can choose according to the display panel type. It is different to determine which screen belongs to the high power consumption screen. For example, it can be determined that the screens such as 1dot 255, 2Dot 255, V Line are high power consumption screens, and there is no specific limitation here.
  • embodiments of the present disclosure provide a driving method of a display panel, a driving circuit thereof, and a display device.
  • a driving method of a display panel a driving circuit thereof, and a display device.
  • specific implementations of the display panel driving method, its driving circuit, and the display device provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure. And if there is no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.
  • a method for driving a display panel provided by an embodiment of the present disclosure, as shown in FIG. 4, includes:
  • Step S401 Obtain a data signal of a picture to be displayed; where the data signal includes grayscale data corresponding to each pixel, where the grayscale data includes the magnitude of the grayscale voltage corresponding to each pixel and the positive and negative polarity of the grayscale voltage.
  • each frame of the display picture can be tested, or the test can be performed at intervals of preset frames, which can be set according to actual display requirements, which is not specifically limited here.
  • Step S402 Determine whether the to-be-displayed screen belongs to the high-power-consumption display screen according to the data parameters corresponding to the high-power consumption display screen set for the display panel and the data signal of the to-be-displayed screen;
  • the description is made by taking the data parameter corresponding to the preset high-power display screen including data corresponding to 1 dot 255 screen as an example.
  • the polarity of the gray-scale voltage of two adjacent pixels driven by the same data line of 1 dot 255 screen is opposite, that is, one negative and one positive.
  • the gray-scale voltage also changes directly from 0 (black pixel) to 255 (white pixel). ), or directly change from 255 (white pixel) to 0 (black pixel), that is, the voltage polarity change and the voltage magnitude change of the grayscale data are both the largest, resulting in a 1 dot 255 screen that is a high-power display screen.
  • the data parameter corresponding to the high-power display screen mentioned in the present disclosure may include the threshold number of the change process from 0 to 255 or 255 to 0 loaded on the same data line, that is, if the data signal of the to-be-displayed screen includes more than N
  • the above-mentioned change process is considered to be a high-power display screen. If the data signal of the to-be-displayed screen includes less than or equal to N of the above-mentioned change processes, the to-be-displayed screen is considered to be a low-power display screen.
  • the value of N can be determined according to the display panel of the application, which is not specifically limited here.
  • the data parameters corresponding to the high-power display screen are determined according to different types of liquid crystal display panels. There may be differences in the definition of the high-power display screen for different types of liquid crystal display panels.
  • the type of the display panel is determined, and there is no specific limitation here.
  • Step S403 When it is determined that the picture to be displayed belongs to a high-power display picture, the first reference voltage provided by the external voltage source is amplified into a second reference voltage, and the second reference voltage is provided to the touch and display integrated circuit of the display panel And power management circuit;
  • Step S404 When it is determined that the picture to be displayed belongs to a low-power display picture, the first reference voltage is provided to the touch and display integrated circuit and the power management circuit of the display panel.
  • the power management circuit is configured to convert the reference voltage signal it obtains into the display panel gate on-state voltage VGH and the display panel gate off-state voltage VGL required by the gate drive circuit of the display panel;
  • the obtained reference voltage signal is converted into the display panel source positive analog voltage AVDDP and the display panel source negative analog voltage AVDDN required by the touch and display integrated circuit of the display panel.
  • the external voltage source provides the first reference voltage VDD to the display panel.
  • the power management circuit After the display panel receives the VDD voltage, the power management circuit generates the VGH/VGL/AVDDP/AVDDN voltage required by the display panel.
  • the VDD voltage range is usually 3.3V ⁇ 0.3V. When displaying a low power consumption screen, the current is small, and the actual voltage to the input voltage terminal of the power management circuit is within this range, and other voltages generated are also within the voltage range required by the display panel, and the display screen is normal.
  • the current is large, and the actual voltage to the input voltage terminal of the power management circuit may be less than 3V, that is, less than the minimum power supply voltage required by the power management circuit, then the power management circuit converted under this power supply voltage
  • the voltage of VGH/VGL/AVDDP/AVDDN may also exceed the voltage range required by the corresponding circuit of the display panel, resulting in abnormal display, black screen or abnormal picture.
  • the present disclosure determines whether to amplify the first reference voltage provided by the external voltage source to obtain the second reference voltage by determining whether the picture to be displayed belongs to the high-power display picture, and provide the second reference voltage to the touch and display integrated circuit of the display panel. And the power management circuit to drive each pixel to ensure the normal display of the high-power display screen. That is, the present disclosure determines the power consumption type of the picture to be displayed, and provides reference voltages of different voltage intensities according to the picture to be displayed with different power consumption, so as to ensure that display pictures with different power consumption can be displayed normally, thereby improving the display quality of the display panel.
  • the display screen can specifically include:
  • the data parameters corresponding to the high-power display screen and the data signal of the to-be-displayed screen determine whether the data signal of the to-be-displayed screen includes the data parameter corresponding to the high-power-consumption display screen;
  • the proportion is greater than the preset value, it is determined that the picture to be displayed is a high-power display picture
  • the driving method of the display panel provided by the embodiment of the present disclosure, it is possible to determine whether the data signal of the screen to be displayed includes the data parameter corresponding to the high-power display screen, and to determine the data parameter corresponding to the high-power display screen.
  • the ratio of the data signal of the picture to be displayed is used to determine whether the picture to be displayed belongs to a high power consumption display picture, that is, whether the picture to be displayed belongs to a high power consumption display picture is determined by judging the overall power consumption of the picture to be displayed.
  • the data signal of the screen to be displayed includes data parameters corresponding to the high-power display screen
  • the data parameters corresponding to the high-power display screen account for a small proportion of the data signal of the screen to be displayed.
  • the required power consumption is not large, therefore, the picture to be displayed cannot be determined to be a high-power display picture.
  • the low-power consumption display screen is relative to the high-power consumption screen, and the low-power consumption screen includes not only the display screen with lower power consumption than the normal level, but also the display screen with normal power consumption. That is, the screen to be displayed is either a high-power display screen or a low-power display screen.
  • the setting of the preset value can be set according to the actual display needs, and can be set Belonging to more than 50%.
  • other proportions can also be used, which are not specifically limited here.
  • the driving method of the display panel provided by the embodiment of the present disclosure, it may further include:
  • the power management circuit processes the received first reference voltage or the second reference voltage, and provides the processed voltages to the touch and display integrated circuit and the gate drive circuit respectively.
  • the main function of the power management circuit is to convert the voltage obtained by the power management circuit and provide it to the touch and display integrated circuit and the gate driving circuit to realize the display Normal drive of the panel.
  • the VDD voltage can be converted to the VGH/VGL/AVDDP/AVDDN voltage, that is, the power management circuit obtains the corresponding on-state voltage of the display panel gate and the display panel gate according to the received first reference voltage and the second reference voltage.
  • the off-state voltage, the analog voltage of the positive electrode of the display panel source and the negative analog voltage of the display panel source are provided, and the on-state voltage of the display panel grid and the off-state voltage of the display panel grid are provided to the gate drive circuit, and the positive electrode of the display panel
  • the analog voltage and the analog voltage of the negative electrode of the source of the display panel are provided to the touch and display integrated circuit.
  • the embodiments of the present disclosure also provide a driving circuit for a display panel, as shown in FIG. 5, including: a picture detection circuit 1, a voltage processing circuit 2, a power management circuit 3, a touch and display integrated circuit 4 and gate drive circuit 5;
  • the picture detection circuit 1 is configured to obtain the data signal of the picture to be displayed, and determine whether the picture to be displayed belongs to the high power display according to the data parameters corresponding to the high power consumption display picture set for the display panel and the data signal of the picture to be displayed When it is determined that the picture to be displayed is a high-power display picture, the voltage processing circuit 2 is provided with a first control signal, and when it is determined that the picture to be displayed is a low-power display picture, the voltage processing circuit 2 is provided with a second control signal;
  • the voltage processing circuit 2 is configured to receive a first reference voltage VDD provided by an external voltage source, and upon receiving the first control signal, convert the first reference voltage into a second reference voltage, and provide the second reference voltage to the power management
  • the circuit 3 and the touch and display integrated circuit 4 provide a first reference voltage to the power management circuit 3 and the touch and display integrated circuit 4 when receiving the second control signal; wherein, the second reference voltage is greater than the first reference voltage Voltage;
  • the power management circuit 3 is configured to receive the first reference voltage or the second reference voltage provided by the voltage processing circuit 2, and after the first reference voltage or the second reference voltage is processed, the processed voltage is provided to the touch and display respectively Integrated circuit 4 and gate drive circuit 5.
  • the power consumption type of the picture to be displayed can be determined through the setting of the picture detection circuit, that is, whether the picture to be displayed belongs to the high power consumption display picture or belongs to A low-power display screen, when it belongs to a high-power display screen, provides a first control signal to the voltage processing circuit so that the voltage processing circuit will output the amplified second reference voltage; when it belongs to a low-power display screen, The second control signal is provided to the voltage processing circuit, and the first reference voltage is directly output, so as to meet the demand for the supply voltage when displaying display images with different power consumption.
  • the picture detection circuit includes: a preset picture detection sub-circuit and a display picture determination sub-circuit;
  • the preset picture detection sub-circuit is configured to determine whether the data signal of the picture to be displayed includes the data parameter corresponding to the picture to be displayed based on the data parameter corresponding to the high-power display picture and the data signal of the picture to be displayed;
  • the display screen determining sub-circuit is configured to determine whether the data signal of the to-be-displayed screen contains the data parameter corresponding to the high-power display screen when it is determined that the data signal of the screen to be displayed includes the data parameter corresponding to the high-power display screen. Greater than the preset value, when the proportion is greater than the preset value, it is determined that the picture to be displayed is a high-power display picture;
  • the preset value may be greater than 50%.
  • the voltage processing circuit includes: a first switch control sub-circuit K1, a second switch control sub-circuit K3, and an amplifying sub-circuit 21 ;
  • the input terminal of the first switch control sub-circuit K1 is electrically connected to an external voltage source, and the output terminal VDD_OUT of the first switch control sub-circuit K1 is electrically connected to the power management circuit 3 and the touch and display integrated circuit 4 respectively; the first switch control sub-circuit The circuit K1 is configured to be turned off under the control of the first control signal, and turned on under the control of the second control signal;
  • the input terminal of the second switch control sub-circuit K2 is electrically connected to the external voltage source, the output terminal of the second switch control sub-circuit K2 is electrically connected to the input terminal of the amplifying sub-circuit 21, and the output terminal VDD_OUT of the amplifying sub-circuit 21 is respectively connected to the power management
  • the circuit 3 and the touch and display integrated circuit 4 are electrically connected;
  • the second switch control sub-circuit 2 is configured to be turned on under the control of the first control signal, and turned off under the control of the second control signal;
  • the amplifying sub-circuit 21 is configured to receive the first reference voltage when the second switch control sub-circuit K2 is turned on, amplify the first reference voltage, and provide the amplified second reference voltages to the power management circuit 3 respectively And touch and display integrated circuit 4.
  • the first reference voltage provided by the external voltage source is VDD
  • K1 and K2 are analog switches, which are controlled by the image detection circuit.
  • the initial values of K1 and K2 can be set as K1 on and K2 on, that is, the amplifying sub-circuit is initially not working.
  • the picture detection circuit detects the high power consumption display picture
  • the picture detection circuit controls K1 to close and K2 to open, and the voltage VDD is amplified.
  • the magnification can be determined by debugging.
  • the picture detection circuit continues to detect the picture once for N frames.
  • K1 and K2 are turned on immediately, so that the amplifying sub-circuit stops working, and so on.
  • the structure of the amplifying sub-circuit shown in FIG. 6 is only an exemplary description, and is not limited to this structure. Any other circuit structure capable of realizing the voltage amplifying function is within the protection scope of the present disclosure and will not be specifically described here. limited.
  • the power management circuit includes: a first voltage conversion sub-circuit and a second voltage conversion sub-circuit;
  • the first voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained analog voltage of the positive electrode of the display panel and the analog voltage of the negative electrode of the display panel to the touch and display integrated circuit;
  • the second voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained display panel gate on-state voltage and display panel gate off-state voltage to the gate driving circuit.
  • the driving circuit for the display panel provided by the embodiments of the present disclosure has all the advantages of the driving method for the display panel provided by the above-mentioned embodiments. Among them, the function of each sub-circuit and the beneficial effects produced by it have been implemented in the driving method. A detailed explanation is given, so I won’t repeat it here.
  • embodiments of the present disclosure also provide a display device, which includes the drive circuit provided in any of the above-mentioned embodiments, and a liquid crystal display panel electrically connected to the drive circuit.
  • the display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and so on.
  • a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and so on.
  • Other indispensable components of the display device are understood by those of ordinary skill in the art, and will not be repeated here, nor should they be used as a limitation to the present disclosure.
  • the implementation of the display device can be referred to the embodiment of the above-mentioned display panel, and the repetition will not be repeated.
  • the embodiments of the present disclosure provide a driving method of a display panel, a driving circuit thereof, and a display device.
  • the driving method obtains whether the picture to be displayed belongs to a high power consumption display picture; when it is determined that the picture to be displayed belongs to a high power consumption display picture
  • the second reference voltage amplified by the first reference voltage provided by the external voltage source is provided to the touch and display integrated circuit and the power management circuit of the display panel, each pixel is driven to ensure the normal display of the high-power display screen ;
  • the first reference voltage is directly provided to the touch and display integrated circuit and the power management circuit of the display panel to drive each pixel in the display panel to ensure low power consumption Normal display of power consumption screen.
  • the present disclosure determines the power consumption type of the picture to be displayed, and provides reference voltages of different voltage intensities according to the picture to be displayed with different power consumption, so as to ensure that display pictures with different power consumption can be displayed normally, thereby improving the display quality of the display panel.

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Abstract

提供了一种显示面板的驱动方法、其驱动电路及显示装置。通过获取该待显示画面是否属于大功耗显示画面（S401）；当确定该待显示画面属于大功耗显示画面（S402）时，将外部电压源提供的第一参考电压放大后的第二参考电压提供给显示面板的触控与显示集成电路和电源管理电路（S403），对各像素进行驱动，保证大功耗显示画面的正常显示；当确定该待显示画面属于低功耗显示画面时，直接将第一参考电压提供给显示面板的触控与显示集成电路和电源管理电路（S404），对显示面板内的各像素进行驱动，以保证低功耗画面的正常显示。即通过确定待显示画面的功耗类型，根据不同功耗的待显示画面提供不同电压强度的参考电压，以保证可以正常显示不同功耗的显示画面。

Description

显示面板的驱动方法、其驱动电路及显示装置
相关申请的交叉引用
本公开要求在2020年02月21日提交中国专利局、申请号为202010107440.2、申请名称为“一种显示面板的驱动方法、其驱动电路及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及显示技术领域，尤指一种显示面板的驱动方法、其驱动电路及显示装置。
背景技术
随着显示技术的发展，将触摸功能嵌入到液晶显示面板中，使液晶显示面板的薄型化和轻型化成为可能，从而逐渐成为发展的主流方向。
针对触控与显示集成技术，可以采用外部电压源提供一参考电压进行供电，通过驱动电路对该参考电压进行转换，得到驱动显示面板所需的驱动信号。但是，在液晶显示面板显示大功耗画面时，由于带载能力不足，会导致液晶显示面板出现黑屏或者画异的问题。
发明内容
本公开实施例提供了一种显示面板的驱动方法，包括：
获取待显示画面的数据信号；
根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面；
当确定所述待显示画面属于所述大功耗显示画面时，将外部电压源提供的第一参考电压放大成为第二参考电压，并将所述第二参考电压提供给所述显示面板的触控与显示集成电路和电源管理电路；
当确定所述待显示画面属于低功耗显示画面时，将所述第一参考电压提供给所述显示面板的触控与显示集成电路和电源管理电路。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动方法中，所述根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面，具体包括：
根据所述大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面的数据信号是否包括所述大功耗显示画面对应的数据参数；
当确定所述待显示画面的数据信号包括所述大功耗显示画面对应的数据参数时，判断所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例是否大于预设值；
当所占比例比大于所述预设值时，确定所述待显示画面属于所述大功耗显示画面。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动方法中，所述根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面，还包括：
当确定所述待显示画面的数据信号不包括所述大功耗显示画面对应的数据参数时，或者，当确定所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例小于预设值时，确定所述待显示画面属于所述低功耗显示画面。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动方法中，所述预设值大于50％。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动方法中，所述方法还包括：
所述电源管理电路对接收到的所述第一参考电压或所述第二参考电压进 行处理，将处理后的电压分别提供给所述触控与显示集成电路和栅极驱动电路。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动方法中，所述电源管理电路对接收到的所述第一参考电压或所述第二参考电压进行处理，将处理后的电压分别提供给所述触控与显示集成电路和栅极驱动电路，具体包括：
所述电源管理电路根据接收到的所述第一参考电压和所述第二参考电压，得到对应的显示面板栅极开态电压、显示面板栅极关态电压、显示面板源极正极模拟电压和显示面板源极负极模拟电压，并将所述显示面板栅极开态电压和所述显示面板栅极关态电压提供给栅极驱动电路，将所述显示面板源极正极模拟电压和所述显示面板源极负极模拟电压提供给所述触控与显示集成电路。
第二方面，本公开实施了还提供了一种显示面板的驱动电路，包括：电压处理电路、画面侦测电路、电源管理电路、触控与显示集成电路和栅极驱动电路；
所述画面侦测电路被配置为获取待显示画面的数据信号，并根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面，当确定所述待显示画面属于所述大功耗显示画面时，向所述电压处理电路提供第一控制信号，在确定所述待显示画面属于低功耗显示画面时，向所述电压处理电路提供第二控制信号；
所述电压处理电路被配置为接收外部电压源提供的第一参考电压，在接收到所述第一控制信号时，将所述第一参考电压转换为第二参考电压，并将所述第二参考电压提供给所述电源管理电路和所述触控与显示集成电路，在接收到所述第二控制信号时，将所述第一参考电压提供给所述电源管理电路和所述触控与显示集成电路；其中，所述第二参考电压大于所述第一参考电压；
所述电源管理电路被配置为接收所述电压处理电路提供的所述第一参考电压或所述第二参考电压，将所述第一参考电压或所述第二参考电压进行处理后，将处理后的电压分别提供给所述触控与显示集成电路和所述栅极驱动电路。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动电路中，所述画面侦测电路包括：预设画面侦测子电路和显示画面确定子电路；
所述预设画面侦测子电路被配置为根据所述大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面的数据信号是否包括所述大功耗显示画面对应的数据参数；
所述显示画面确定子电路被配置为当确定所述待显示画面的数据信号包括所述大功耗显示画面对应的数据参数时，判断所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例是否大于预设值，当所占比例比大于所述预设值时，确定所述待显示画面属于所述大功耗显示画面；
当确定所述待显示画面的数据信号不包括所述大功耗显示画面对应的数据参数时，或者，当确定所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例小于预设值时，确定所述待显示画面属于所述低功耗显示画面。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动电路中，所述预设值大于50％。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动电路中，所述电压处理电路包括：第一开关控制子电路、第二开关控制子电路和放大子电路；
所述第一开关控制子电路的输入端与所述外部电压源电连接，所述第一开关控制子电路的输出端分别与所述电源管理电路和所述触控与显示集成电路电连接；所述第一开关控制子电路被配置为在所述第一控制信号的控制下断开，在所述第二控制信号的控制下导通；
所述第二开关控制子电路的输入端与所述外部电压源电连接，所述第二 开关控制子电路的输出端与所述放大子电路的输入端电连接，所述放大子电路的输出端分别与所述电源管理电路和所述触控与显示集成电路电连接；
所述第二开关控制子电路被配置为在所述第一控制信号的控制下导通，在所述第二控制信号的控制下断开；
所述放大子电路被配置为在所述第二开关控制子电路导通时，接收所述第一参考电压，并对所述第一参考电压进行放大处理得到第二参考电压，将所述第二参考电压分别提供给所述电源管理电路和所述触控与显示集成电路。
在一种可能的实施方式中，在本公开实施了提供的显示面板的驱动电路中，所述电源管理电路包括：第一电压转化子电路和第二电压转化子电路；
所述第一电压转化子电路被配置为将所述第一参考电压或所述第二参考电压进行转化，并将得到的显示面板源极正极模拟电压和显示面板源极负极模拟电压提供给所述触控与显示集成电路；
所述第二电压转化子电路被配置为将所述第一参考电压或所述第二参考电压进行转化，并将得到的显示面板栅极开态电压和显示面板栅极关态电压提供给所述栅极驱动电路。
第三方面，本公开实施例还提供了一种显示装置，包括第二方面任一实施例提供的驱动电路，以及与所述驱动电路电连接的液晶显示面板。
附图说明
图1为相关技术中的显示面板的驱动电路的结构示意图；
图2为显示面板显示低功耗画面时的数据参数示意图；
图3为显示面板显示大功耗画面时的数据参数示意图；
图4为本公开实施例提供的显示面板的驱动方法的流程示意图；
图5为本公开实施例提供的显示面板的驱动电路的电路结构示意图；
图6为本公开实施例提供的电压处理电路的电路结构示意图。
具体实施方式
在相关技术的内嵌式显示面板中，由于将触控功能嵌入到液晶显示面板中，可以极大的减小显示面板的厚度，并且触控与显示集成电路(Touch and Display Driver Integration，TDDI)可以节约驱动电路的成本。
相关技术的TDDI技术中，电源方案有两种：一种是驱动电路所需要的电源由主控TDDI芯片内部产生，如VGH/VGL/AVDDP/AVDDN，由于芯片产生的电源电流有限，此种方式只适合小尺寸小分辨率，即最大功耗小的面板使用。
另一种是驱动电路所需要的电源由外部的电源管理电路产生，电源管理电路产生的电压电流比TDDI芯片内部产生的电流大，适用于大尺寸大分辨率的液晶显示面板，如12.8FHD(1920*1080)TDDI显示面板即采用此种供电方式。外部电压源供给显示面板的电源通常仅供电电压VDD一路，那么驱动电路所需要的其他电压均需通过VDD这一路电压进行转换，此转换过程在电源管理电路内部完成。
如图1所示，该驱动电路包括：电源管理电路、触控与显示集成电路和栅极驱动电路，外部电压源将参考信号VDD分别提供给电源管理电路和触控与显示集成电路，电源管理电路将VDD信号转换为显示面板栅极开态电压VGH，显示面板栅极关态电压VGL，显示面板源极正极模拟电压AVDDP，以及显示面板源极负极模拟电压AVDDN，并将VGH和VGL电压提供给栅极驱动电路，将AVDDP和AVDDN电压提供给触控与显示集成电路，以驱动显示面板进行工作。
触控与显示集成电路需要同时驱动显示面板和触控面板，对于供电电压VDD而言，这两部分驱动电路均为其负载电路。此负载电路相较于普通显示面板负载更大，即理论上供电电压的带载能力应更强。但是由于提升供电电压的带载能力外部电压源需要更加复杂的电路，同时外部电压源的成本也会提升，因此在实际使用中，通常外部电压源的带载能力都是不够的。因此常会出现在大功耗画面下，显示面板出现黑屏或者画异的情况。
其中，对于液晶显示面板而言，功耗与数据线上加载信号的幅值切换频率和幅值大小有关。对于正常架构的液晶显示面板而言，一根数据线控制一列像素，在该列像素中存在灰阶不同的像素越多，这根数据线幅值切换频率越大。而灰阶幅值越大，数据线推动力也要越大，从而功耗也会越大。
以黑画面和1dot 255画面为例。如图2所示，为黑画面对应的数据参数，同一列子像素中所施加数据信号的极性为负，灰阶为0，相邻像素的灰阶均相同，在对同一列子像素进行驱动时，无需对数据信号的极性和灰阶进行变化，因此，功耗最小。如图3所示，为1dot 255画面，针对一根数据线控制的像素而言，相邻两个像素所施加数据信号在负极性和正极性之间切换，并且灰阶需要从0变化到255，该种画面的显示会比黑画面的功耗大很多。
当然，上述仅是以1dot 255画面为例对大功耗画面进行说明，针对不同类型的液晶显示面板，其所确定的大功耗画面也会存在差别，本领域技术人员可以根据显示面板类型的不同确定何种画面属于大功耗画面，如可以确定1dot 255、2Dot 255、V Line等画面属于大功耗画面，在此不作具体限定。
针对相关技术中存在的上述问题，本公开实施例提供了一种显示面板的驱动方法、其驱动电路及显示装置。为了使本公开的目的，技术方案和优点更加清楚，下面结合附图，对本公开实施例提供的显示面板的驱动方法、其驱动电路及显示装置的具体实施方式进行详细地说明。应当理解，下面所描述的优选实施例仅用于说明和解释本公开，并不用于限定本公开。并且在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。
附图中各部件的形状和大小不反应真实比例，目的只是示意说明本公开内容。
具体地，本公开实施例提供的一种显示面板的驱动方法，如图4所示，包括：
步骤S401、获取待显示画面的数据信号；其中，该数据信号包括各像素对应的灰阶数据，其中，该灰阶数据包括各像素对应的灰阶电压大小和灰阶电压的正负极性。
在获取待显示画面的数据信号时，可以对每帧显示画面均进行检测，也可以间隔预设帧进行检测，可根据实际显示需求进行设定，在此不作具体限定。
步骤S402、根据针对显示面板设置的大功耗显示画面对应的数据参数和待显示画面的数据信号，确定待显示画面是否属于大功耗显示画面；
具体地，以该预设的大功耗显示画面对应的数据参数包括1dot 255画面对应的数据为例进行说明。其中，1dot 255画面同一数据线驱动的相邻两个像素的灰阶电压极性是相反的，即一负一正，灰阶电压的大小也是从0(黑像素)直接变化到255(白像素)，或者从255(白像素)直接变化到0(黑像素)，即灰阶数据的电压极性变化和电压大小的变化均是最大的，从而导致1dot 255画面属于大功耗显示画面。本公开提到的大功耗显示画面对应的数据参数可以包括同一数据线加载的0～255或255～0的变化过程的阈值个数，即若该待显示画面的数据信号包括大于N个的上述变化过程，则认为该待显示画面属于大功耗显示画面，若该待显示画面的数据信号包括小于或等于N个的上述变化过程，则认为该待显示画面属于低功耗显示画面。其中，N值的大小可根据应用的显示面板进行确定，在此不作具体限定。
其中，该大功耗显示画面对应的数据参数是根据不同类型的液晶显示面板进行确定的，针对不同类型的液晶显示面板对大功耗显示画面的定义会存在差异，本领域技术人员可以根据液晶显示面板的类型进行确定，在此不作具体限定。
步骤S403、当确定待显示画面属于大功耗显示画面时，将外部电压源提供的第一参考电压放大成为第二参考电压，并将第二参考电压提供给显示面板的触控与显示集成电路和电源管理电路；
步骤S404、当确定待显示画面属于低功耗显示画面时，将第一参考电压提供给显示面板的触控与显示集成电路和电源管理电路。
其中，电源管理电路被配置为可以将其获得的参考电压信号转换为显示面板的栅极驱动电路所需要的显示面板栅极开态电压VGH和显示面板栅极 关态电压VGL；还可以将其获得的参考电压信号转换为显示面板的触控与显示集成电路所需要的显示面板源极正极模拟电压AVDDP和显示面板源极负极模拟电压AVDDN。
具体地，外部电压源提供第一参考电压VDD给显示面板，显示面板接收到VDD电压后通过电源管理电路产生显示面板所需要的VGH/VGL/AVDDP/AVDDN电压，VDD电压范围通常为3.3V±0.3V。在显示低功耗画面时，电流较小，实际到电源管理电路输入电压端的电压在此范围内，则产生的其他电压也在显示面板所需电压范围内，显示画面正常。在显示大功耗画面时，电流较大，实际到电源管理电路输入电压端的电压有可能小于3V，即小于电源管理电路所需供电电压最小值，则在该供电电压下电源管理电路转换后的VGH/VGL/AVDDP/AVDDN电压也可能超出显示面板对应电路所需的电压范围，从而造成显示异常，出现黑屏或者画异。
由上可知，在大功耗画面下，如果不改变外部电压源供电电压结构，则需在面板驱动电路中对输入电压进行放大，但是直接增加电压放大电路有可能会造成低功耗画面时输入电压大于3.6V，即超过输入电压最大值，显示面板也有画异的可能。
因此，本公开通过判断待显示画面是否属于大功耗显示画面的方式，确定是否将外部电压源提供的第一参考电压放大得到第二参考电压，并提供给显示面板的触控与显示集成电路和电源管理电路，对各像素进行驱动，以保证大功耗显示画面的正常显示。即本公开通过确定待显示画面的功耗类型，根据不同功耗的待显示画面提供不同电压强度的参考电压，以保证可以正常显示不同功耗的显示画面，从而提高显示面板的显示质量。
可选地，在本公开实施例提供的显示面板的驱动方法中，根据针对显示面板设置的大功耗显示画面对应的数据参数和待显示画面的数据信号，确定待显示画面是否属于大功耗显示画面，可以具体包括：
根据大功耗显示画面对应的数据参数和待显示画面的数据信号，确定待显示画面的数据信号是否包括大功耗显示画面对应的数据参数；
当确定待显示画面的数据信号包括大功耗显示画面对应的数据参数时，判断待显示画面的数据信号中大功耗显示画面对应的数据参数所占比例是否大于预设值；
当所占比例比大于预设值时，确定待显示画面属于大功耗显示画面；
当确定待显示画面的数据信号不包括大功耗显示画面对应的数据参数时，或者，当确定待显示画面的数据信号中大功耗显示画面对应的数据参数所占比例小于预设值时，确定待显示画面属于低功耗显示画面。
具体地，在本公开实施例提供的显示面板的驱动方法中，可以通过判断待显示画面的数据信号是否包括大功耗显示画面对应的数据参数，以及确定大功耗显示画面对应的数据参数占待显示画面的数据信号的比例，来确定该待显示画面是否属于大功耗显示画面，即通过判断该待显示画面的整体功耗来确定，该待显示画面是否属于大功耗显示画面。
例如，待显示画面的数据信号虽然包括大功耗显示画面对应的数据参数，但是大功耗显示画面对应的数据参数占待显示画面的数据信号的比例很小，说明在显示该待显示画面时所需的功耗并不大，因此，待显示画面不能被确定属于大功耗显示画面。
需要说明的是，低功耗显示画面是相对于大功耗画面来说的，该低功耗画面除了包括功耗低于正常水平的显示画面，还包括正常功耗的显示画面。即该待显示画面不是属于大功耗显示画面，就是属于低功耗显示画面。
其中，为区别大功耗显示画面和低功耗显示画面所设定的数据参数占待显示画面的数据信号的比例，即该预设值的设定可根据实际显示需要进行设定，可以设置属于大于50％。当然，也可以为其他占比，在此不作具体限定。
可选地，在本公开实施例提供的显示面板的驱动方法中，还可以包括：
电源管理电路对接收到的第一参考电压或第二参考电压进行处理，将处理后的电压分别提供给触控与显示集成电路和栅极驱动电路。
具体地，在本公开实施例提供的显示面板的驱动方法中，该电源管理电路主要作用是将其获取到的电压进行转换，提供给触控与显示集成电路和栅 极驱动电路，以实现显示面板的正常驱动。例如，可以将VDD电压转换为VGH/VGL/AVDDP/AVDDN电压，即电源管理电路根据接收到的第一参考电压和第二参考电压，得到对应的显示面板栅极开态电压、显示面板栅极关态电压、显示面板源极正极模拟电压和显示面板源极负极模拟电压，并将显示面板栅极开态电压和显示面板栅极关态电压提供给栅极驱动电路，将显示面板源极正极模拟电压和显示面板源极负极模拟电压提供给触控与显示集成电路。
基于同一发明构思，本公开实施例还提供了一种显示面板的驱动电路，如图5所示，包括：画面侦测电路1、电压处理电路2、电源管理电路3、触控与显示集成电路4和栅极驱动电路5；
画面侦测电路1被配置为获取待显示画面的数据信号，并根据针对显示面板设置的大功耗显示画面对应的数据参数和待显示画面的数据信号，确定待显示画面是否属于大功耗显示画面，当确定待显示画面属于大功耗显示画面时，向电压处理电路2提供第一控制信号，在确定待显示画面属于低功耗显示画面时，向电压处理电路2提供第二控制信号；
电压处理电路2被配置为接收外部电压源提供的第一参考电压VDD，在接收到第一控制信号时，将第一参考电压转换为第二参考电压，并将第二参考电压提供给电源管理电路3和触控与显示集成电路4，在接收到第二控制信号时，将第一参考电压提供给电源管理电路3和触控与显示集成电路4；其中，第二参考电压大于第一参考电压；
电源管理电路3被配置为接收电压处理电路2提供的第一参考电压或第二参考电压，将第一参考电压或第二参考电压进行处理后，将处理后的电压分别提供给触控与显示集成电路4和栅极驱动电路5。
具体地，在本公开实施例提供的显示面板的驱动电路中，通过画面侦测电路的设置，可以确定该待显示画面的功耗类型，即该待显示画面是属于大功耗显示画面还是属于低功耗显示画面，当其属于大功耗显示画面时向电压处理电路提供第一控制信号，使电压处理电路将放大后的第二参考电压进行 输出；当其属于低功耗显示画面时，向电压处理电路提供第二控制信号，直接将第一参考电压进行输出，以满足显示不同功耗的显示画面时，对供电电压的需求。
可选地，在本公开实施例提供的显示面板的驱动电路中，该画面侦测电路包括：预设画面侦测子电路和显示画面确定子电路；
该预设画面侦测子电路被配置为根据大功耗显示画面对应的数据参数和待显示画面的数据信号，确定待显示画面的数据信号是否包括大功耗显示画面对应的数据参数；
该显示画面确定子电路被配置为当确定待显示画面的数据信号包括大功耗显示画面对应的数据参数时，判断待显示画面的数据信号中大功耗显示画面对应的数据参数所占比例是否大于预设值，当所占比例比大于预设值时，确定待显示画面属于大功耗显示画面；
当确定待显示画面的数据信号不包括大功耗显示画面对应的数据参数时，或者，当确定待显示画面的数据信号中大功耗显示画面对应的数据参数所占比例小于预设值时，确定待显示画面属于低功耗显示画面。
可选地，在本公开实施例提供的显示面板的驱动电路中，预设值可以大于50％。
可选地，在本公开实施例提供的显示面板的驱动电路中，如图6所示，该电压处理电路包括：第一开关控制子电路K1、第二开关控制子电路K3和放大子电路21；
第一开关控制子电路K1的输入端与外部电压源电连接，第一开关控制子电路K1的输出端VDD_OUT分别与电源管理电路3和触控与显示集成电路4电连接；第一开关控制子电路K1被配置为在第一控制信号的控制下断开，在第二控制信号的控制下导通；
第二开关控制子电路K2的输入端与外部电压源电连接，第二开关控制子电路K2的输出端与放大子电路21的输入端电连接，放大子电路21的输出端VDD_OUT分别与电源管理电路3和触控与显示集成电路4电连接；
第二开关控制子电路2被配置为在第一控制信号的控制下导通，在第二控制信号的控制下断开；
放大子电路21被配置为在第二开关控制子电路K2导通时，接收第一参考电压，并对第一参考电压进行放大处理，将放大后的第二参考电压分别提供给电源管理电路3和触控与显示集成电路4。
外部电压源提供的第一参考电压为VDD，K1、K2为模拟开关，受画面侦测电路控制。当K2闭合、K1开启时，输入到电源管理电路的电压VDD_OUT＝VDD；当K2开启、K1闭合时，放大子电路开始工作，输入到电源管理电路的电压VDD_OUT＝(1+R2/R3)*VDD，放大倍数由R2与R3阻值确定。
具体实施方法为：K1、K2初始值可以设置为K1开启、K2闭合，即初始为放大子电路不工作。当画面侦测电路侦测到大功耗显示画面后，画面侦测电路控制K1闭合、K2开启，对电压VDD进行放大，放大倍数可通过调试确定。画面侦测电路继续N帧侦测一次画面，当大功耗画面显示退出后，立即开启K1、闭合K2，使放大子电路停止工作，如此循环。
其中，图6中所示的放大子电路的结构仅是作为示例性说明，并不仅限于该种结构，其他任何能够实现电压放大功能的电路结构均在本公开的保护范围内，在此不作具体限定。
可选地，在本公开实施例提供的显示面板的驱动电路中，电源管理电路包括：第一电压转化子电路和第二电压转化子电路；
第一电压转化子电路被配置为将第一参考电压或第二参考电压进行转化，并将得到的显示面板源极正极模拟电压和显示面板源极负极模拟电压提供给触控与显示集成电路；
第二电压转化子电路被配置为将第一参考电压或第二参考电压进行转化，并将得到的显示面板栅极开态电压和显示面板栅极关态电压提供给栅极驱动电路。
需要说明的是，本公开实施例提供的显示面板的驱动电路具有上述实施 例提供的显示面板的驱动方法的全部优点，其中，各子电路的功能及所产生的有益效果已经在驱动方法中进行了详细的阐述，在此不再赘述。
基于同一发明构思，本公开实施例还提供了一种显示装置，该显示装置包括上述任一实施例提供的驱动电路，以及与该驱动电路电连接的液晶显示面板。
该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。对于该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本公开的限制。该显示装置的实施可以参见上述显示面板的实施例，重复之处不再赘述。
本公开实施例提供了一种显示面板的驱动方法、其驱动电路及显示装置，该驱动方法通过获取该待显示画面是否属于大功耗显示画面；当确定该待显示画面属于大功耗显示画面时，将外部电压源提供的第一参考电压放大后的第二参考电压提供给显示面板的触控与显示集成电路和电源管理电路，对各像素进行驱动，保证大功耗显示画面的正常显示；当确定该待显示画面属于低功耗显示画面时，直接将第一参考电压提供给显示面板的触控与显示集成电路和电源管理电路，对显示面板内的各像素进行驱动，以保证低功耗画面的正常显示。即本公开通过确定待显示画面的功耗类型，根据不同功耗的待显示画面提供不同电压强度的参考电压，以保证可以正常显示不同功耗的显示画面，从而提高显示面板的显示质量。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (12)

  1. 一种显示面板的驱动方法，其中，包括：
    获取待显示画面的数据信号；
    根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面；
    当确定所述待显示画面属于所述大功耗显示画面时，将外部电压源提供的第一参考电压放大成为第二参考电压，并将所述第二参考电压提供给所述显示面板的触控与显示集成电路和电源管理电路；
    当确定所述待显示画面属于低功耗显示画面时，将所述第一参考电压提供给所述显示面板的触控与显示集成电路和电源管理电路。
  2. 如权利要求1所述的驱动方法，其中，所述根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面，具体包括：
    根据所述大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面的数据信号是否包括所述大功耗显示画面对应的数据参数；
    当确定所述待显示画面的数据信号包括所述大功耗显示画面对应的数据参数时，判断所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例是否大于预设值；
    当所占比例比大于所述预设值时，确定所述待显示画面属于所述大功耗显示画面。
  3. 如权利要求2所述的驱动方法，其中，所述根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面，还包括：
    当确定所述待显示画面的数据信号不包括所述大功耗显示画面对应的数据参数时，或者，当确定所述待显示画面的数据信号中所述大功耗显示画面 对应的数据参数所占比例小于预设值时，确定所述待显示画面属于所述低功耗显示画面。
  4. 如权利要求3所述的驱动方法，其中，所述预设值大于50％。
  5. 如权利要求1-4任一项所述的驱动方法，其中，所述方法还包括：
    所述电源管理电路对接收到的所述第一参考电压或所述第二参考电压进行处理，将处理后的电压分别提供给所述触控与显示集成电路和栅极驱动电路。
  6. 如权利要求5所述的驱动方法，其中，所述电源管理电路对接收到的所述第一参考电压或所述第二参考电压进行处理，将处理后的电压分别提供给所述触控与显示集成电路和栅极驱动电路，具体包括：
    所述电源管理电路根据接收到的所述第一参考电压和所述第二参考电压，得到对应的显示面板栅极开态电压、显示面板栅极关态电压、显示面板源极正极模拟电压和显示面板源极负极模拟电压，并将所述显示面板栅极开态电压和所述显示面板栅极关态电压提供给栅极驱动电路，将所述显示面板源极正极模拟电压和所述显示面板源极负极模拟电压提供给所述触控与显示集成电路。
  7. 一种显示面板的驱动电路，其中，包括：电压处理电路、画面侦测电路、电源管理电路、触控与显示集成电路和栅极驱动电路；
    所述画面侦测电路被配置为获取待显示画面的数据信号，并根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面是否属于所述大功耗显示画面，当确定所述待显示画面属于所述大功耗显示画面时，向所述电压处理电路提供第一控制信号，在确定所述待显示画面属于低功耗显示画面时，向所述电压处理电路提供第二控制信号；
    所述电压处理电路被配置为接收外部电压源提供的第一参考电压，在接收到所述第一控制信号时，将所述第一参考电压转换为第二参考电压，并将所述第二参考电压提供给所述电源管理电路和所述触控与显示集成电路，在 接收到所述第二控制信号时，将所述第一参考电压提供给所述电源管理电路和所述触控与显示集成电路；其中，所述第二参考电压大于所述第一参考电压；
    所述电源管理电路被配置为接收所述电压处理电路提供的所述第一参考电压或所述第二参考电压，将所述第一参考电压或所述第二参考电压进行处理后，将处理后的电压分别提供给所述触控与显示集成电路和所述栅极驱动电路。
  8. 如权利要求7所述的驱动电路，其中，所述画面侦测电路包括：预设画面侦测子电路和显示画面确定子电路；
    所述预设画面侦测子电路被配置为根据所述大功耗显示画面对应的数据参数和所述待显示画面的数据信号，确定所述待显示画面的数据信号是否包括所述大功耗显示画面对应的数据参数；
    所述显示画面确定子电路被配置为当确定所述待显示画面的数据信号包括所述大功耗显示画面对应的数据参数时，判断所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例是否大于预设值，当所占比例比大于所述预设值时，确定所述待显示画面属于所述大功耗显示画面；
    当确定所述待显示画面的数据信号不包括所述大功耗显示画面对应的数据参数时，或者，当确定所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例小于预设值时，确定所述待显示画面属于所述低功耗显示画面。
  9. 如权利要求8所述的驱动电路，其中，所述预设值大于50％。
  10. 如权利要求7-9任一项所述的驱动电路，其中，所述电压处理电路包括：第一开关控制子电路、第二开关控制子电路和放大子电路；
    所述第一开关控制子电路的输入端与所述外部电压源电连接，所述第一开关控制子电路的输出端分别与所述电源管理电路和所述触控与显示集成电路电连接；所述第一开关控制子电路被配置为在所述第一控制信号的控制下断开，在所述第二控制信号的控制下导通；
    所述第二开关控制子电路的输入端与所述外部电压源电连接，所述第二开关控制子电路的输出端与所述放大子电路的输入端电连接，所述放大子电路的输出端分别与所述电源管理电路和所述触控与显示集成电路电连接；所述第二开关控制子电路被配置为在所述第一控制信号的控制下导通，在所述第二控制信号的控制下断开；
    所述放大子电路被配置为在所述第二开关控制子电路导通时，接收所述第一参考电压，并对所述第一参考电压进行放大处理得到第二参考电压，将所述第二参考电压分别提供给所述电源管理电路和所述触控与显示集成电路。
  11. 如权利要求7-9任一项所述的驱动电路，其中，所述电源管理电路包括：第一电压转化子电路和第二电压转化子电路；
    所述第一电压转化子电路被配置为将所述第一参考电压或所述第二参考电压进行转化，并将得到的显示面板源极正极模拟电压和显示面板源极负极模拟电压提供给所述触控与显示集成电路；
    所述第二电压转化子电路被配置为将所述第一参考电压或所述第二参考电压进行转化，并将得到的显示面板栅极开态电压和显示面板栅极关态电压提供给所述栅极驱动电路。
  12. 一种显示装置，其中，包括如权利要求7-11任一项所述的驱动电路，以及与所述驱动电路电连接的液晶显示面板。
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