WO2023039945A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2023039945A1
WO2023039945A1 PCT/CN2021/121139 CN2021121139W WO2023039945A1 WO 2023039945 A1 WO2023039945 A1 WO 2023039945A1 CN 2021121139 W CN2021121139 W CN 2021121139W WO 2023039945 A1 WO2023039945 A1 WO 2023039945A1
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WIPO (PCT)
Prior art keywords
display device
voltage
displayed
gamma voltage
image
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Ceased
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PCT/CN2021/121139
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English (en)
French (fr)
Inventor
袭悦
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to JP2021560009A priority Critical patent/JP7509796B2/ja
Priority to US17/607,544 priority patent/US12148399B2/en
Publication of WO2023039945A1 publication Critical patent/WO2023039945A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. 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
    • 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
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection
    • G09G2330/045—Protection against panel overheating
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Definitions

  • the present application relates to the field of display technology, in particular to a display device and a driving method thereof.
  • liquid crystal displays with high refresh rate such as 120HZ
  • high image quality such as 8K
  • the industry usually solves the overheating problem of the driver chip by adding a heat sink on the driver chip or selecting a high-standard chip with high current resistance and high power consumption.
  • this method will increase the production cost and is not conducive to the large-scale production of display devices.
  • the present application provides a display device and a driving method thereof to solve the technical problem in the prior art that the display device consumes too much power when displaying heavy-duty images.
  • the present application provides a driving method of a display device, which includes:
  • the picture to be displayed is a heavy-duty picture, adjust the first gamma voltage corresponding to the picture to be displayed to a second gamma voltage, wherein the voltage value of the second gamma voltage corresponding to the same gray scale is less than a voltage value of the first gamma voltage;
  • the display device is driven to display the image to be displayed according to the second gamma voltage.
  • the step of adjusting the first gamma voltage corresponding to the image to be displayed to the second gamma voltage includes:
  • the analog power supply voltage being used to generate the first gamma voltage
  • the step of reducing the voltage value of the analog power supply voltage to adjust the first gamma voltage to the second gamma voltage includes:
  • the power consumption of the display device is greater than the preset power consumption, continue to reduce the analog power supply voltage until the power consumption of the display device is less than the preset power consumption.
  • the step of adjusting the first gamma voltage to the second gamma voltage includes:
  • the driving method of the display device further includes:
  • the image to be displayed is a heavy-duty image, reduce the voltage value of the driving voltage.
  • the driving method of the display device further includes:
  • the picture to be displayed is a heavy-duty picture, increase the brightness of the backlight of the display device.
  • the step of judging whether the screen to be displayed is an overloaded screen includes:
  • the step of acquiring the brightness distribution characteristics of the reloaded screen includes:
  • the step before the step of driving the display device to display the picture to be displayed according to the second gamma voltage, the step further includes:
  • the present application also provides a method for driving a display device, which includes:
  • the picture to be displayed is a heavy-duty picture, adjust the first gamma voltage corresponding to the picture to be displayed to a second gamma voltage, wherein the voltage value of the second gamma voltage corresponding to the same gray scale is less than a voltage value of the first gamma voltage;
  • If the image to be displayed is a non-heavy image, driving the display device to display the image to be displayed according to the first gamma voltage.
  • the step of adjusting the first gamma voltage corresponding to the image to be displayed to the second gamma voltage includes:
  • the analog power supply voltage being used to generate the first gamma voltage
  • the step of reducing the voltage value of the analog power supply voltage to adjust the first gamma voltage to the second gamma voltage includes:
  • the power consumption of the display device is greater than the preset power consumption, continue to reduce the analog power supply voltage until the power consumption of the display device is less than the preset power consumption.
  • the step of adjusting the first gamma voltage to the second gamma voltage includes:
  • the driving method of the display device further includes:
  • the image to be displayed is a heavy-duty image, reduce the voltage value of the driving voltage.
  • the driving method of the display device further includes:
  • the picture to be displayed is a heavy-duty picture, increase the brightness of the backlight of the display device.
  • the step of acquiring the brightness distribution characteristics of the reloaded screen includes:
  • the driving method of the display device further includes:
  • If the image to be displayed is a non-heavy image, driving the display device to display the image to be displayed according to the first gamma voltage.
  • the present application also provides a display device, which includes:
  • an acquisition module configured to acquire a picture to be displayed
  • a detection module used to judge whether the image to be displayed is an overloaded image
  • An adjustment module configured to adjust the first gamma voltage corresponding to the to-be-displayed picture to a second gamma voltage when the to-be-displayed picture is a heavy-duty picture, wherein the second gamma voltage corresponding to the same grayscale the voltage value of the horse voltage is smaller than the voltage value of the first gamma voltage;
  • a driving module configured to drive the display device to display the image to be displayed according to the second gamma voltage.
  • the adjustment module is further configured to adjust the second gamma voltage according to a target gamma voltage curve.
  • the adjustment module is further configured to increase the brightness of the backlight of the display device when the image to be displayed is a heavy-load image.
  • the present application provides a display device and a driving method thereof.
  • the driving method of the display device includes: acquiring a picture to be displayed; judging whether the picture to be displayed is a heavy-duty picture; if the picture to be displayed is a heavy-duty picture, adjusting the first gamma voltage corresponding to the picture to be displayed to The second gamma voltage, wherein the voltage value of the second gamma voltage corresponding to the same gray scale is smaller than the voltage value of the first gamma voltage; the display device is driven according to the second gamma voltage to display the Describe the screen to be displayed.
  • the power consumption of the display device when displaying the heavy-duty picture can be reduced, and the source driver chip can be avoided.
  • the increase in temperature affects the display quality, and the problem of overheating when the source driver chip displays heavy-duty images is solved at a lower cost.
  • FIG. 1 is a schematic flowchart of a driving method of a display device provided by the present application
  • Fig. 2 is a schematic flow chart of step 102 in Fig. 1;
  • 3A-3C are structural schematic diagrams of the display device provided by the present application under the first driving framework to reload the screen;
  • 4A-4B are structural schematic diagrams of the display device provided by the present application under the second driving framework to reload the screen;
  • FIG. 5 is a schematic structural diagram of a gamma voltage divider circuit provided by the present application.
  • FIG. 6 is a schematic diagram of the first structure of the display device provided by the present application.
  • FIG. 7 is a second structural schematic diagram of the display device provided by the present application.
  • FIG. 8 is a schematic diagram of a third structure of a display device provided by the present application.
  • the present application provides a display device and a driving method thereof, which will be described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application.
  • the driving method of the display device provided in the present application, firstly, a picture to be displayed is acquired. Then, it is judged whether the screen to be displayed is an overloaded screen. If the picture to be displayed is a heavy load picture, the first gamma voltage corresponding to the picture to be displayed is adjusted to the second gamma voltage. Wherein, the second gamma voltage corresponding to the same gray scale is smaller than the first gamma voltage. Finally, the display device is driven to display the image to be displayed according to the second gamma voltage.
  • a is the power consumption coefficient.
  • f is the row refresh rate of the display device.
  • C is the panel capacitance in the display device.
  • V is the variation amplitude of the data voltage on the same data line.
  • this application transforms the heavy-loaded picture into a non-heavy-loaded picture (light-loaded picture), and finally displays it as a light-loaded picture, so that on the premise of maintaining the overall brightness of the picture to be displayed, it reduces the number of phases driven by the same data line.
  • the change in brightness between sub-pixels in adjacent rows reduces the amount of change in the data signal, thereby reducing the load on the source driver chip, and solving the overheating problem of the source driver chip when displaying a heavy-duty screen at a lower cost, while avoiding In order to prevent the display quality from being affected by the temperature rise of the source driver chip.
  • FIG. 1 is a schematic flowchart of a driving method of a display device provided in the present application.
  • the driving method of the display device specifically includes the following steps:
  • a System on Chip (SOC) of a display device outputs a video signal to a timing control chip (Timer Controller, TCON).
  • the timing control chip analyzes the video signal to obtain the data information of the picture to be displayed.
  • the timing control chip processes the parsed data information of the image to be displayed to obtain brightness information of the image to be displayed. Then, it is judged whether the picture to be displayed is a heavy load picture according to the brightness information of the picture to be displayed.
  • Step 102 comprises the following steps:
  • the overloaded screen of the display device has different brightness distribution characteristics. Therefore, in this step, it is first necessary to obtain the pixel driving architecture type of the display device. Then, determine the brightness distribution characteristics of the overloaded picture according to the type of pixel driving architecture.
  • FIGS. 3A-3C and FIGS. 4A-4B are structural schematic diagrams of the display device provided in the present application under the first driving framework for reloading images.
  • FIGS. 3A-3C are structural schematic diagrams of the display device provided in the present application under the first driving framework for reloading images.
  • 4A-4B are structural schematic diagrams of the display device provided by the present application under the second driving framework for reloading images.
  • the display device includes multiple data lines 41 , multiple scan lines 42 and sub-pixels 40 arranged in an array.
  • the data lines 41 and the scan lines 42 are intersected.
  • Each sub-pixel 40 is connected to a corresponding data line 41 and a scan line 42 , and is defined by the intersection of the data line 41 and the scan line 42 . Every three sub-pixels 40 constitute a pixel unit.
  • the pixel driving architecture shown in this application is only an example, and should not be construed as a limitation of this application.
  • the first driving architecture refers to a conventional driving architecture
  • the second driving architecture refers to a driving architecture with a polarity inversion characteristic. It can be understood that, since the liquid crystal molecules will be polarized under the driving of the DC voltage and cause image sticking, the pixel driving signal adopts a method of alternating positive and negative polarity voltages to drive the liquid crystal molecules.
  • the second driving architecture mainly includes frame inversion, column inversion, row inversion, dot inversion, etc. according to different polarity inversion methods.
  • the reloading screen is an H-strip screen.
  • the brightness distribution of the H-strip image under the first driving architecture is characterized by: among two adjacent rows of sub-pixels 40 , one row of sub-pixels 40 is bright, and one row of sub-pixels 40 is dark.
  • the gray scale value of L128-L255 can be set as high potential, that is, 1; L0-L127 is low potential, that is, 0.
  • the image display data of the display panel is binary 8-bit, that is, 256 different brightness gray scales (for example, recorded as 0th grayscale to 255th grayscale) are used as an example for illustration, but this should not be construed as a limitation of this application.
  • the reloading screen is a Dot on off screen.
  • Dot The luminance distribution characteristic of the on-off picture is: among two adjacent sub-pixels 40 , one sub-pixel 40 is bright, and the other sub-pixel 40 is dark. That is, when the first sub-pixel 40 is at high potential 1, the second sub-pixel 40 is at low potential.
  • the reload screen is Pixel on off screen.
  • the brightness distribution feature of the Pixel on off picture is: among two adjacent pixel units, the three sub-pixels 40 in one pixel unit are all bright, and the three sub-pixels 40 in one pixel unit are all dark.
  • the reloading screen is also an H-strip screen.
  • This overloaded screen is displayed under the row inversion driving architecture. That is, among two adjacent rows of sub-pixels 40 , one row of sub-pixels 40 corresponds to a positive polarity voltage, and one row of sub-pixels 40 corresponds to a negative polarity voltage.
  • the reloading screen is displayed under the column inversion driving architecture.
  • the overloaded image is a V-strip image
  • the brightness distribution of the V-strip image is characterized by: among two adjacent columns of sub-pixels 40 , one column of sub-pixels 40 is bright and the other column of sub-pixels 40 is dark.
  • a column of sub-pixels is a high potential 1
  • a column of sub-pixels is a low potential 0.
  • the brightness distribution characteristics of the reloaded picture can be input into the timing control chip.
  • a storage unit can be set inside the timing control chip to store the brightness distribution characteristics of the reloaded screen.
  • the brightness distribution characteristics of the reloaded picture can be stored in the timing control chip in the form of code.
  • inputting the brightness distribution characteristics of the overloaded screen into the timing control chip generally has two dimensions.
  • One is the dimension of RGB brightness, and the other is the dimension of screen coordinates and area.
  • the present application inputs the luminance distribution characteristics corresponding to the overloaded screen into the timing control chip for subsequent operations. It should be noted that the reloading screens under different driver architectures are not limited to the above examples, and thus should not be understood as limiting the present application.
  • the timing control chip processes the analyzed data information of the picture to be displayed to obtain the display gray scale of each sub-pixel of the picture to be displayed. According to the relationship between the display gray scale and the display brightness, the brightness distribution characteristics of the picture to be displayed can be obtained.
  • the picture to be displayed is a reloading picture.
  • the brightness distribution characteristics of the image to be displayed are compared with the brightness distribution characteristics of the overloaded image. If the brightness distribution characteristics of the image to be displayed are the same as the brightness distribution characteristics of the overloaded image, it is determined that the image to be displayed is an overloaded image. If the brightness distribution characteristics of the image to be displayed are different from the brightness distribution characteristics of the overloaded image, it is determined that the image to be displayed is a non-overloaded image.
  • the V-strip screen shown in FIG. 3A is taken as an example for description. It can be known from the above embodiments that the brightness distribution of the V-strip image is characterized by: among two adjacent rows of sub-pixels 40 , the first row of sub-pixels 40 is at a high potential 1, and the second row of sub-pixels 40 is at a low potential of 0.
  • the picture to be displayed is a heavy-duty picture, adjust the first gamma voltage corresponding to the picture to be displayed to a second gamma voltage, wherein the voltage of the second gamma voltage corresponding to the same gray scale value is less than the voltage value of the first gamma voltage.
  • the step of adjusting the first gamma voltage corresponding to the picture to be displayed to the second gamma voltage includes:
  • a display device generally includes a gamma voltage divider circuit or a gamma chip.
  • the gamma voltage divider circuit or the gamma chip is connected to the analog power supply voltage to output the gamma voltage under the control of the analog power supply voltage.
  • the voltage value of the analog power supply voltage VAA can be set according to the display brightness requirement of the display device.
  • the reference voltage is usually ground voltage. It can be seen that the analog power supply voltage determines the voltage value of the gamma voltage output by the gamma voltage divider circuit or the gamma chip.
  • FIG. 5 is a schematic structural diagram of a gamma voltage divider circuit provided in the present application.
  • the gamma voltage dividing circuit 20 includes a plurality of voltage dividing resistors connected in series (not shown in the figure). Multiple series-connected voltage dividing resistors are connected to the analog power supply voltage VAA and the reference voltage VSS.
  • the gamma voltage dividing circuit 20 can output multiple gray scale binding point voltages, such as GMA1-GMA14.
  • the gamma voltages corresponding to other gray scales can be obtained by interpolation according to the gray scale binding point voltage and the target gamma curve, and will not be repeated here.
  • the present application adjusts the first gamma voltage to the second gamma voltage by reducing the voltage value of the analog power supply voltage VAA.
  • the requirement that the voltage value of the second gamma voltage corresponding to the same gray scale is smaller than the voltage value of the first gamma voltage can be met.
  • the power consumption caused by the analog supply voltage VAA is the power consumption of in-plane pumping.
  • the power consumption of the analog power supply voltage VAA of some display devices can reach more than 50% of the total power consumption. Therefore, the present application reduces the analog power supply voltage VAA and adjusts the first gamma voltage to the second gamma voltage, which can effectively reduce the power consumption of the display device when displaying heavy-duty images.
  • step 1032 includes the following steps:
  • the analog power supply voltage VAA is usually provided by a PMIC (Power Management IC, power management integrated circuit). Therefore, if it is determined that the image to be displayed is a heavy image, the PMIC reduces the analog power supply voltage VAA to the first voltage, and outputs the first voltage to the gamma voltage divider circuit 20 to obtain the second gamma voltage.
  • PMIC Power Management IC, power management integrated circuit
  • the power consumption of the white screen of the display device is 3.1W
  • the power consumption of the heavy-duty screen is usually 4.2W. If the maximum power consumption requested by the customer does not exceed 3.6W, it is necessary to reduce the analog power supply voltage VAA, and then obtain the actual power consumption of the display device through measurement until it is reduced to 3.6W.
  • the preset power consumption is the specification requirement of power consumption when the display device displays a heavy-duty screen, which can be set according to the actual needs of customers, and is not specifically limited in this application.
  • the power consumption of the display device can be detected under the driving of the analog power supply voltage VAA and the second gamma voltage. If the power consumption of the display device is less than the preset power consumption, the gamma voltage dividing circuit 20 outputs the second gamma voltage based on the first voltage and stores it in the storage unit.
  • the second gamma voltage corresponding to the same gray scale is smaller than the first gamma voltage. Then reduce the power consumption of the heavy-duty screen, and actually reduce the brightness of the heavy-duty screen. That is, this solution will not affect the screen display of the overloaded screen, but the overall screen brightness will be reduced. Therefore, in the process of actually adjusting the analog power supply voltage VAA, it is necessary to gradually reduce the analog power supply voltage VAA, so as to reduce the power consumption of the heavy-duty screen while ensuring that the overall brightness of the heavy-duty screen is less affected.
  • the reduction range of the analog power supply voltage VAA can be set according to the difference between the power consumption of the heavy load screen and the preset power consumption, which is not specifically limited in this application.
  • the step of adjusting the first gamma voltage to a second gamma voltage includes:
  • the amount of reduction of the first gamma voltage corresponding to each gray scale can be set according to the difference between the power consumption of the heavy load screen and the preset power consumption.
  • the amount of reduction of the first gamma voltage corresponding to each gray scale can be the same or different.
  • the difference between the first gamma voltage and the second gamma voltage corresponding to low gray levels It may be smaller than the difference between the first gamma voltage and the second gamma voltage corresponding to the high gray scale, so as to avoid affecting the display of the heavy-duty picture.
  • a logic unit may be added in the source driver chip or the PMIC to realize the function of reducing the first gamma voltage corresponding to each gray scale to obtain the second gamma voltage.
  • the second gamma voltage needs to meet the target gamma voltage curve. It can be understood that there is no linear relationship between the brightness perceived by human eyes and the actual display brightness of the display panel. In a low-brightness environment, the human eye is more sensitive to changes in brightness, and vice versa in a high-brightness environment. This characteristic of the human eye is called the gamma characteristic. Due to the characteristics of the human eye's nonlinear perception of brightness, if we need to obtain a uniformly changing brightness experience, the brightness displayed on the display panel needs to change non-uniformly to adapt to the gamma characteristics of the human eye.
  • the non-linear parameters of the brightness and gray scale of the display panel may be called gamma parameters, and the brightness and gray scale curves drawn according to the gamma parameters are called gamma curves.
  • the gamma parameter illustrates the nonlinear relationship between brightness and gray scale, that is, the nonlinear relationship between brightness and gamma voltage. Therefore, if the brightness and gray scale of the display panel do not meet the target gamma curve, the gamma voltage of the display panel needs to be corrected.
  • the target gamma curve may be a gamma curve with a gamma parameter of 2.2.
  • the second gamma voltage is used to drive the display device to display the heavy-duty picture, and the purpose is to reduce the power consumption of the heavy-duty picture.
  • the purpose is to reduce the power consumption of the heavy-duty picture.
  • it is also necessary to consider the display effect of the heavy-duty screen. Therefore, while adjusting the first gamma voltage to the second gamma voltage, making the second gamma voltage meet the target gamma curve can improve the display effect and user experience.
  • the first gamma voltage and the second gamma voltage are stored in different address locations in the storage unit.
  • the storage unit is disposed inside the PMIC. If it is a three-in-one PMIC, that is, PMIC, Level-shift IC (level conversion chip) and GAMMA IC (gamma chip) integrated in the same chip. Then the storage unit can be an external EEPROM (Electrically Erasable Programmable read only memory, electrically erasable programmable read-only memory) or flash (flash memory).
  • the timing control chip calls the second gamma voltage in the storage unit.
  • the timing control chip passes I2C (Inter-Integrated Circuit, integrated circuit bus, also known as IIC) gives instructions to the PMIC, and the PMIC outputs the second gamma voltage to the source driver chip after receiving the instructions.
  • I2C Inter-Integrated Circuit, integrated circuit bus, also known as IIC
  • the source driver chip outputs the second gamma voltage to the display panel through the data line to display a heavy-duty picture.
  • the timing control chip starts calling the first gamma voltage in the storage unit through I2C.
  • the source driver chip drives the display device to display images to be displayed according to the first gamma voltage.
  • FIG. 6 is a first structural schematic diagram of a display device provided in the present application.
  • the display device 100 includes a source driver chip 31 and a display panel 30 .
  • the source driver chip 31 is used to output the first gamma voltage or the second gamma voltage to the display panel 30 .
  • the driving method of the display device further includes the following steps:
  • 105 Acquire a driving voltage of a source driver chip, where the source driver chip is used to output the first gamma voltage or the second gamma voltage.
  • the source driver chip 31 works normally under the driving voltage.
  • the source driver chip 31 outputs the first gamma voltage or the second gamma voltage to the display panel 30 through the data line.
  • the number of source driver chips 31 can be set according to the size and pixel resolution of the display panel 30 .
  • each source driver chip 31 needs to be driven by a certain range of driving voltage VDD to work normally. Therefore, when the display device 100 displays a heavy-duty picture, the power consumption of the display device 100 and the temperature of the source driver chip 31 can also be reduced by reducing the driving voltage VDD of the source driver chip 31 .
  • the driving voltage VDD of the source driving chip 31 can be adjusted within the range of 2.9V-3.3V.
  • FIG. 7 is a second structural schematic diagram of the display device provided by the present application.
  • the display device 100 includes a backlight module 32 and a display panel 30 .
  • the backlight module 32 is used for providing backlight to the display panel 30 .
  • the driving method of the display device further includes the following steps:
  • reducing the power consumption of the overloaded screen reduces the overall screen brightness of the overloaded screen.
  • the overall brightness is reduced by about 10%.
  • the brightness of the backlight module 32 is increased.
  • the brightness of the backlight can increase the brightness of the heavy-duty screen, thereby compensating for the reduction in brightness caused by the reduction of the driving voltage.
  • the backlight brightness of the backlight module 32 can be increased by increasing the driving voltage of the light source in the backlight module 32 and increasing the driving current of the backlight.
  • the present application is not limited thereto, and specifically, the way to increase the brightness of the backlight can be selected according to the structure of the light source of the backlight module 32 .
  • the display device 100 further includes a timing control chip 33 .
  • the timing control chip 33 is connected to the backlight module 32 . If the image to be displayed is a heavy image, the timing control chip 33 sends a control signal to the backlight module 32 .
  • the backlight module 32 increases the brightness of the backlight based on the control signal.
  • the control signal can be fed back to the backlight module 32 in time, thereby controlling the backlight module 32. Adjust the brightness of the backlight.
  • the present application also provides a display device, which displays a picture to be displayed under the driving method of the display device described in any one of the above embodiments.
  • a display device which displays a picture to be displayed under the driving method of the display device described in any one of the above embodiments.
  • the driving method of the display device reference may be made to the above-mentioned embodiments, and details are not repeated here.
  • the display device in this application may be a smart phone, a tablet computer, a video player, a personal computer (PC), etc., which is not limited in this application.
  • FIG. 8 is a schematic diagram of a third structure of a display device provided by the present application.
  • the display device 100 includes: an acquisition module 11 , a detection module 12 , an adjustment module 13 and a drive module 14 . details as follows:
  • the acquiring module 11 is used to acquire the image to be displayed. Usually, the acquiring module 11 can be set in the timing control chip. A storage unit can be set inside the timing control chip to store relevant information of the screen to be displayed.
  • the detection module 12 is used for judging whether the screen to be displayed is a heavy load screen. Specifically, the detection module 12 may process the analyzed data information of the image to be displayed to obtain the display gray scale of each sub-pixel of the image to be displayed. According to the relationship between the display gray scale and the display brightness, the brightness distribution characteristics of the picture to be displayed can be obtained. Then, it is judged whether the picture to be displayed is a heavy-duty picture according to the brightness distribution characteristics of the picture to be displayed.
  • the detection module 12 can detect the type of the pixel driving structure of the display device 100 . Then, determine the brightness distribution characteristics of the overloaded picture according to the type of pixel driving architecture. And input the brightness distribution characteristics of the reloaded picture into the timing control chip. Finally, the brightness distribution characteristics of the image to be displayed are compared with the brightness distribution characteristics of the overloaded image. If the brightness distribution characteristics of the image to be displayed are the same as the brightness distribution characteristics of the overloaded image, it is determined that the image to be displayed is an overloaded image. If the brightness distribution characteristics of the image to be displayed are different from the brightness distribution characteristics of the overloaded image, it is determined that the image to be displayed is a non-overloaded image.
  • the adjustment module 13 is used for judging whether the picture to be displayed is a heavy picture according to the brightness distribution characteristics of the heavy picture. If the picture to be displayed is a heavy load picture, the first gamma voltage corresponding to the picture to be displayed is adjusted to the second gamma voltage. The second gamma voltage corresponding to the same gray scale is smaller than the first gamma voltage.
  • the adjustment module 13 may adjust the first gamma voltage to the second gamma voltage by reducing the voltage value of the analog power supply voltage.
  • the analog power supply voltage is used to generate the first gamma voltage.
  • the adjustment module 13 may reduce the first gamma voltage corresponding to each gray scale according to the difference between the power consumption of the reloaded screen and the preset power consumption, so as to obtain the corresponding gamma voltage of each gray scale. of the second gamma voltage.
  • the second gamma voltage can be adjusted to meet the target gamma voltage curve. In this way, the display effect and user experience are improved while reducing the power consumption of the heavy-duty screen.
  • the adjustment module 13 may also reduce the power consumption of the display device 100 by reducing the voltage value of the driving voltage.
  • the driving voltage is used to drive the source driver chip to work normally.
  • the source driver chip is used to output the first gamma voltage or the second gamma voltage.
  • the adjustment module 13 may also increase the brightness of the backlight of the display device 100 . It is understandable that reducing the power consumption of the overloaded screen will reduce the overall screen brightness of the overloaded screen. Therefore, in order to reduce the power consumption of the heavy-duty screen while ensuring that the display brightness of the heavy-duty screen remains unchanged as a whole, in this embodiment, when the display device 100 is driven to display the heavy-duty screen according to the second gamma voltage, the brightness of the backlight module 32 is increased. The brightness of the backlight can increase the brightness of the heavy-duty screen, thereby compensating for the reduction in brightness caused by the reduction of the driving voltage.
  • the driving module 14 is configured to drive the display device 100 to display the heavy picture according to the second gamma voltage.
  • the driving module 14 is configured to drive the display device 100 to display the non-overload image according to the first gamma voltage.
  • the present application provides a display device 100, which can display images through a driving method of the display device.
  • the driving method of the display device 100 includes: first acquiring a picture to be displayed. Then, it is judged whether the screen to be displayed is an overloaded screen. If the picture to be displayed is a heavy load picture, the first gamma voltage corresponding to the picture to be displayed is adjusted to the second gamma voltage. Wherein, the second gamma voltage corresponding to the same gray scale is smaller than the first gamma voltage. Finally, the display device is driven to display the image to be displayed according to the second gamma voltage.
  • the present application can reduce the power consumption of the display device 100 when displaying a heavy-duty picture, avoid affecting the display quality due to the temperature rise of the source driver chip, and reduce the production cost at the same time.

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Abstract

显示装置（100）及显示装置（100）的驱动方法，显示装置（100）的驱动方法包括：获取待显示画面（101）；判断待显示画面是否为重载画面（102）；若待显示画面为重载画面，将待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的第二伽马电压的电压值小于第一伽马电压的电压值（103）；根据第二伽马电压驱动显示装置（100）显示待显示画面（104）。

Description

显示装置及其驱动方法 技术领域
本申请涉及显示技术领域，具体涉及一种显示装置及其驱动方法。
 背景技术
随着人们对显示品质的不断追求，高刷新率(例如120HZ)和高画质(例如8K)的液晶显示器必然会成为以后的发展趋势。然而高刷新率和高画质的面板驱动架构中会存在一些重载画面。在显示重载画面时，存在数据电压在高电平和低电平之间频繁切换的现象。
 技术问题
由于切换前后的压差很大，会导致源极驱动器的温度过高，从而对源极驱动器造成损伤，使其无法正常工作，并且会造成电流的大量消耗，提高显示装置的功耗。目前业内通常在驱动芯片上增加散热片或选用耐流高功耗高的高规格芯片等方式来解决驱动芯片的过热问题，但此种方式会增加生产成本，不利于显示装置的大规模生产。
因此，亟需提出一种解决重载画面功耗高的技术方案。
 技术解决方案
本申请提供一种显示装置及其驱动方法，以解决现有技术中，显示装置在显示重载画面时功耗过高的技术问题。
本申请提供一种显示装置的驱动方法，其包括：
获取待显示画面；
判断所述待显示画面是否为重载画面；
若所述待显示画面为重载画面，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值；
根据所述第二伽马电压驱动所述显示装置显示所述待显示画面。
可选的，在本申请一些实施例中，所述将所述待显示画面对应的第一伽马电压调整为第二伽马电压的步骤包括：
获取所述显示装置的模拟电源电压，所述模拟电源电压用于产生所述第一伽马电压；
减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压。
可选的，在本申请一些实施例中，所述减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压的步骤包括：
将所述模拟电源电压减小至第一电压；
获取所述显示装置的功耗，若所述显示装置的功耗小于预设功耗，基于所述第一电压，输出所述第二伽马电压；
若所述显示装置的功耗大于所述预设功耗，继续减小所述模拟电源电压，直至所述显示装置的功耗小于所述预设功耗。
可选的，在本申请一些实施例中，所述将所述第一伽马电压调整为第二伽马电压的步骤包括：
根据重载画面的功耗与预设功耗的差值，减小每一所述灰阶对应的所述第一伽马电压，以得到每一所述灰阶对应的所述第二伽马电压。
可选的，在本申请一些实施例中，所述显示装置的驱动方法还包括：
获取源极驱动芯片的驱动电压，所述源极驱动芯片用于输出所述第一伽马电压或所述第二伽马电压；
若所述待显示画面为重载画面，降低所述驱动电压的电压值。
可选的，在本申请一些实施例中，所述显示装置的驱动方法还包括：
若所述待显示画面为重载画面，提高所述显示装置的背光亮度。
可选的，在本申请一些实施例中，所述判断所述待显示画面是否为重载画面的步骤包括：
获取重载画面的亮度分布特征；
获取所述待显示画面的亮度分布特征；
将所述重载画面的亮度分布特征与所述待显示画面的亮度分布特征进行比对，若所述重载画面的亮度分布特征与所述待显示画面的亮度分布特征相同，则判断所述待显示画面为重载画面。
可选的，在本申请一些实施例中，所述获取重载画面的亮度分布特征的步骤包括：
获取所述显示装置的像素驱动架构类型；
根据所述像素驱动架构类型确定所述重载画面的亮度分布特征。
可选的，在本申请一些实施例中，所述根据所述第二伽马电压驱动所述显示装置显示所述待显示画面的步骤之前还包括：
根据目标伽马曲线对所述第二伽马电压进行伽马校正。
本申请还提供一种显示装置的驱动方法，其包括：
获取待显示画面以及所述待显示画面的亮度分布特征；
获取重载画面的亮度分布特征；
根据所述待显示画面的亮度分布特征和所述重载画面的亮度分布特征，判断所述待显示画面是否为重载画面；
若所述待显示画面为重载画面，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值；
根据所述第二伽马电压驱动所述显示装置显示所述待显示画面；
若所述待显示画面为非重载画面，根据所述第一伽马电压驱动所述显示装置显示所述待显示画面。
可选的，在本申请一些实施例中，所述将所述待显示画面对应的第一伽马电压调整为第二伽马电压的步骤包括：
获取所述显示装置的模拟电源电压，所述模拟电源电压用于产生所述第一伽马电压；
减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压。
可选的，在本申请一些实施例中，所述减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压的步骤包括：
将所述模拟电源电压减小至第一电压；
获取所述显示装置的功耗，若所述显示装置的功耗小于预设功耗，基于所述第一电压，输出所述第二伽马电压；
若所述显示装置的功耗大于所述预设功耗，继续减小所述模拟电源电压，直至所述显示装置的功耗小于所述预设功耗。
可选的，在本申请一些实施例中，所述将所述第一伽马电压调整为第二伽马电压的步骤包括：
根据重载画面的功耗与预设功耗的差值，减小每一所述灰阶对应的所述第一伽马电压，以得到每一所述灰阶对应的所述第二伽马电压。
可选的，在本申请一些实施例中，所述显示装置的驱动方法还包括：
获取源极驱动芯片的驱动电压，所述源极驱动芯片用于输出所述第一伽马电压或所述第二伽马电压；
若所述待显示画面为重载画面，降低所述驱动电压的电压值。
可选的，在本申请一些实施例中，所述显示装置的驱动方法还包括：
若所述待显示画面为重载画面，提高所述显示装置的背光亮度。
可选的，在本申请一些实施例中，所述获取重载画面的亮度分布特征的步骤包括：
获取所述显示装置的像素驱动架构类型；
根据所述像素驱动架构类型确定所述重载画面的亮度分布特征。
可选的，在本申请一些实施例中，所述显示装置的驱动方法还包括：
若所述待显示画面为非重载画面，根据所述第一伽马电压驱动所述显示装置显示所述待显示画面。
相应的，本申请还提供一种显示装置，其包括：
获取模块，用于获取待显示画面；
检测模块，用于判断所述待显示画面是否为重载画面；
调整模块，用于当所述待显示画面为重载画面时，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值；
驱动模块，用于根据所述第二伽马电压驱动所述显示装置显示所述待显示画面。
可选的，在本申请一些实施例中，所述调整模块还用于根据目标伽马电压曲线对所述第二伽马电压进行调整。
可选的，在本申请一些实施例中，所述调整模块还用于当所述待显示画面为重载画面时，提高所述显示装置的背光亮度。
 有益效果
本申请提供一种显示装置及其驱动方法。显示装置的驱动方法包括：获取待显示画面；判断所述待显示画面是否为重载画面；若所述待显示画面为重载画面，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值；根据所述第二伽马电压驱动所述显示装置显示所述待显示画面。本申请通过降低重载画面对应的第一伽马电压，利用第二伽马电压驱动显示装置显示重载画面，能够降低显示装置在显示重载画面时的功耗，避免因源极驱动芯片的温度升高影响显示质量，以较低的成本解决了源极驱动芯片显示重载画面时的过热问题。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请提供的显示装置的驱动方法的流程示意图；
图2是图1中步骤102的流程示意图；
图3A-3C是本申请提供的显示装置在第一驱动架构下重载画面的结构示意图；
图4A-4B是本申请提供的显示装置在第二驱动架构下重载画面的结构示意图；
图5是本申请提供的伽马分压电路的一种结构示意图；
图6是本申请提供的显示装置的第一结构示意图；
图7是本申请提供的显示装置的第二结构示意图；
图8是本申请提供的显示装置的第三结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明与解释本申请，并不用于限制本申请。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。
本申请提供一种显示装置及其驱动方法，以下进行详细说明。需要说明的是，以下实施例的描述顺序不作为对本申请实施例优选顺序的限定。
在本申请提供的显示装置的驱动方法中，首先获取待显示画面。然后，判断待显示画面是否为重载画面。若待显示画面为重载画面，将待显示画面对应的第一伽马电压调整为第二伽马电压。其中，同一灰阶对应的第二伽马电压小于第一伽马电压。最后，根据第二伽马电压驱动显示装置显示待显示画面。
可以理解的是，显示装置的功耗理论计算公式为：P=a*f*C*V 2。其中，a为功耗系数。f为显示装置的行刷新率。C为显示装置中的面板电容。V为同一数据线上的数据电压的变化幅值。由此可知，本申请通过降低重载画面对应的第一伽马电压，利用第二伽马电压驱动显示装置显示重载画面，能够降低同一数据线上的数据电压的变化幅值，从而降低显示装置在显示重载画面时的功耗。
此外，本申请使重载画面转变为非重载画面（轻载画面），最终以轻载画面进行显示，使得在保持待显示画面的整体亮度的前提下，减少了由同一数据线驱动的相邻行子像素之间的亮度变化，减少了数据信号的变化量，进而减轻了源极驱动芯片的负载，以较低的成本解决了源极驱动芯片显示重载画面时的过热问题，同时避免了因源极驱动芯片的温度升高影响显示质量。
以下进行详细介绍。
请参阅图1，图1是本申请提供的显示装置的驱动方法的流程示意图。在本申请中，显示装置的驱动方法具体包括以下步骤：
101、获取待显示画面。
通常，显示装置的系统芯片（System on Chip, SOC）会将视频信号输出至时序控制芯片（Timer Controller, TCON）。时序控制芯片对视频信号进行解析，以得到待显示画面的数据信息。
102、判断所述待显示画面是否为重载画面。
具体的，时序控制芯片对解析出的待显示画面的数据信息进行处理，可以得到待显示画面的亮度信息。然后，根据待显示画面的亮度信息判断待显示画面是否为重载画面。
在一些实施例中，请参阅图2，图2是图1中步骤102的流程示意图。步骤102包括以下步骤：
1021、获取重载画面的亮度分布特征。
需要说明的是，在不同的像素驱动架构类型下，显示装置的重载画面存在不同的亮度分布特征。因此，在本步骤中，首先需要获取显示装置的像素驱动架构类型。然后，根据像素驱动架构类型确定重载画面的亮度分布特征。
具体的，请参阅图3A-3C和图4A-4B，图3A-3C是本申请提供的显示装置在第一驱动架构下重载画面的结构示意图。图4A-4B是本申请提供的显示装置在第二驱动架构下重载画面的结构示意图。
本申请以图3A为例进行说明。显示装置包括多条数据线41、多条扫描线42以及阵列排布的子像素40。数据线41和扫描线42交叉设置。每一子像素40均与相应的数据线41和扫描线42连接，且由数据线41和扫描线42交叉限定。每三个子像素40构成一像素单元。当然，本申请中图示的像素驱动架构仅为示例，不能理解为对本申请的限定。
其中，第一驱动架构指常规驱动架构，第二驱动架构指具有极性反转特性的驱动架构。可以理解的是，由于液晶分子在直流电压驱动下会极化而引起影像残留，因此像素驱动信号采用正负极性电压交替法驱动液晶分子。则第二驱动架构根据极性翻转方式的不同，主要有帧翻转、列翻转、行翻转、点翻转等。
在第一驱动架构下，如图3A所示，重载画面为H-strip画面。第一驱动架构下的H-strip画面的亮度分布特征为：在相邻两行子像素40中，一行子像素40亮，一行子像素40暗。对应到RGB亮度上，即当第一行子像素40为高电位1时，第二行子像素40为低电位0。相应的，可以设置L128-L255灰阶值为高电位，即为1；L0-L127为低电位，即为0。本申请以显示面板的图像显示数据是二进制8bit，即产生256级不同亮度灰阶(比如，记作第0灰阶～第255灰阶)为例进行说明，但不能理解为对本申请的限定。如图3B所示，重载画面为Dot on off画面。Dot on off画面的亮度分布特征为：在相邻两个子像素40中，一个子像素40亮，一个子像素40暗。即当第一个子像素40为高电位1时，第二个子像素40为低电位。如图3C所示，重载画面为Pixel on off画面。Pixel on off画面的亮度分布特征为：在相邻两个像素单元中，一个像素单元中的三个子像素40全亮，一个像素单元中的3个子像素40全暗。
在第二驱动架构下，如图4A所示，此重载画面同样为H-strip画面。与图3A所示的H-strip画面的不同之处在于，此重载画面在行翻转驱动架构下显示。即在相邻两行子像素40中，一行子像素40对应的是正极性电压，一行子像素40对应的是负极性电压。如图4B所示，此重载画面在列翻转驱动架构下显示。此重载画面为V-strip画面，V-strip画面的亮度分布特征为：在相邻两列子像素40中，一列子像素40亮，一列子像素40暗。对应到RGB亮度上面，即一列子像素为高电位1，一列子像素为低电位0。
进一步的，可将重载画面的亮度分布特征输入时序控制芯片。时序控制芯片内部可设置存储单元，以存储重载画面的亮度分布特征。此外，重载画面的亮度分布特征可以以代码（code）的形式存储在时序控制芯片内。
其中，将重载画面的亮度分布特征输入时序控制芯片，一般有两个维度。一个是RGB亮度的维度，一个是画面坐标和面积的维度。
由此，本申请根据显示装置的驱动架构，将对应重载画面的亮度分布特征输入时序控制芯片内，以便后续操作。需要说明的是，不同驱动架构下的重载画面并不仅限于上述示例，因此不能理解为对本申请的限定。
1022、获取所述待显示画面的亮度分布特征。
具体的，时序控制芯片对解析出的待显示画面的数据信息进行处理，得到待显示画面的每一子像素的显示灰阶。根据显示灰阶与显示亮度的关系可以得到待显示画面的亮度分布特征。
1023、将所述重载画面的亮度分布特征与所述待显示画面的亮度分布特征进行比对，若所述重载画面的亮度分布特征与所述待显示画面的亮度分布特征相同，则判断所述待显示画面为重载画面。
具体的，将待显示画面的亮度分布特征与重载画面的亮度分布特征进行比较。若待显示画面的亮度分布特征与重载画面的亮度分布特征相同，则判断待显示画面为重载画面。若待显示画面的亮度分布特征与重载画面的亮度分布特征不相同，则判断待显示画面为非重载画面。
比如，以图3A所示的V-strip画面为例进行说明。由上述实施例可知，V-strip画面的亮度分布特征为：相邻两行子像素40中，第一行子像素40为高电位1，第二行子像素40为低电位0。然后，从坐标与面积的维度进行检测，可以设置从左上角（0，0）检测至（540，960），也即对位于第一行第一列的子像素40至位于第540行到第960行的子像素40进行检测，若检测到的子像素40均为以V-strip画面的特征值排列，即识别为V-strip画面。当然，也可以检测每一子像素40的亮暗情况，以与重载画面的亮度分布特征进行比较，在此不再赘述。
103、若所述待显示画面为重载画面，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值。
具体的，在本申请一些实施例中，所述将所述待显示画面对应的第一伽马电压调整为第二伽马电压的步骤包括：
1031、获取所述显示装置的模拟电源电压，所述模拟电源电压用于产生所述第一伽马电压。
可以理解的是，显示装置通常包括伽马分压电路或伽马芯片。伽马分压电路或伽马芯片接入模拟电源电压，以在模拟电源电压的控制下输出伽马电压。其中，模拟电源电压VAA的电压值可根据显示装置的显示亮度需求设置。基准电压通常为接地电压。可知，模拟电源电压决定了伽马分压电路或伽马芯片输出的伽马电压的电压值大小。
1032、减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压。
具体的，本申请以显示装置包括伽马分压电路为例进行说明。请参阅图5，图5是本申请提供的伽马分压电路的一种结构示意图。其中，伽马分压电路20包括多个串接的分压电阻（图中未画出）。多个串接的分压电阻接入模拟电源电压VAA和基准电压VSS。伽马分压电路20可以输出多个灰阶绑点电压，如GMA1-GMA14。其它灰阶对应的伽马电压可根据灰阶绑点电压以及目标伽马曲线插值得到，在此不再赘述。
由此，本申请通过减小模拟电源电压VAA的电压值，将第一伽马电压调整为第二伽马电压。可以满足同一灰阶对应的第二伽马电压的电压值小于第一伽马电压的电压值的要求。此外，模拟电源电压VAA所引起的功耗为面内抽载的功耗。在显示重载画面时，一些显示装置的模拟电源电压VAA所占的功耗可以达到总功耗的50%以上。因此，本申请通过减小模拟电源电压VAA，将第一伽马电压调整为第二伽马电压，可以有效地减少显示装置显示重载画面时的功耗。
可选的，在本申请一些实施例中，步骤1032包括以下步骤：
1032A、将所述模拟电源电压减小至第一电压。
具体的，模拟电源电压VAA通常由PMIC（Power Management IC, 电源管理集成电路）提供。因此，若判断待显示画面为重载画面，则PMIC将模拟电源电压VAA减小至第一电压，并将第一电压输出至伽马分压电路20，以得到第二伽马电压。
1032B、获取所述显示装置的功耗，若所述显示装置的功耗小于预设功耗，基于所述第一电压，输出所述第二伽马电压。
可以理解的是，对于显示装置的功耗，不同客户的需求不同。例如，在某一款显示装置的测试中，显示装置的白画面功耗为3.1W，重载画面功耗通常为4.2W。如果客户要求的最大功耗不超过3.6W，则需要通过降低模拟电源电压VAA，然后通过量测获得显示装置的实际功耗，直至降低至3.6W。其中，预设功耗即为显示装置显示重载画面时的功耗规格要求，具体可根据客户的实际需求设定，本申请对此不作具体限定。
因此，可在模拟电源电压VAA和第二伽马电压的驱动下，侦测显示装置的功耗。若显示装置的功耗小于预设功耗，伽马分压电路20基于第一电压输出第二伽马电压，并将其存储在存储单元中。
1032C、若所述显示装置的功耗大于所述预设功耗，继续减小所述模拟电源电压，直至所述显示装置的功耗小于所述预设功耗。
可以理解的是，由于同一灰阶对应的第二伽马电压小于第一伽马电压。则降低重载画面的功耗，实际上也会降低重载画面的亮度。也即，该方案不会影响重载画面的画面显示，但是整体画面亮度有所降低。因此，在实际调整模拟电源电压VAA的过程中，需要逐步减小模拟电源电压VAA，以便在降低重载画面功耗的同时，保证重载画面的整体亮度受到较小的影响。
因此，若模拟电源电压VAA减小至第一电压时，显示装置的功耗仍大于预设功耗，则需要继续减小模拟电源电压，直至显示装置的功耗小于预设功耗。需要说明的是，模拟电源电压VAA的减小幅度可根据重载画面功耗与预设功耗的差值进行设定，本申请对此不作具体限定。
在本申请另一些实施例中，所述将所述第一伽马电压调整为第二伽马电压的步骤包括：
1033、根据重载画面的功耗与预设功耗的差值，减小每一所述灰阶对应的所述第一伽马电压，以得到每一所述灰阶对应的所述第二伽马电压。
具体的，每一灰阶对应的第一伽马电压的减少量可根据重载画面功耗与预设功耗的差值设定。每一灰阶对应的第一伽马电压的减少量可以相同，也可以不同。比如，人眼观察到的低灰阶之间的亮度差异较大，高灰阶之间的亮度差异较小，因此，低灰阶对应的第一伽马电压与第二伽马电压的差值可以小于高灰阶对应的第一伽马电压与第二伽马电压的差值，以避免影响重载画面的显示。
具体的，可在源极驱动芯片或者PMIC中增设逻辑单元，以实现减小每一灰阶对应的第一伽马电压，得到第二伽马电压的功能。
进一步的，在一些实施例中，第二伽马电压需满足目标伽马电压曲线。可以理解的是，人眼感知的亮度与显示面板的实际显示亮度并非线性关系。在低亮度环境中，人眼对亮度的变化更敏感，高亮度环境则反之。人眼的这种特性，称为伽马特性。由于人眼对亮度非线性感知的特性，如果我们需要获得均匀变化的亮度感受，则显示面板显示的亮度就需要非均匀变化，以适应人眼的伽马特性。显示面板的亮度与灰阶程度的非线性参数可以称为伽马参数，根据伽马参数绘制的亮度与灰阶曲线称为伽马曲线。伽马参数说明了亮度与灰阶的非线性关系，即亮度与伽马电压的非线性关系。因此，如果显示面板的亮度与灰阶不符合目标伽马曲线，则需要对显示面板的伽马电压校正。在本实施例中，目标伽马曲线可以是伽马参数为2.2的伽马曲线。
本申请利用第二伽马电压驱动显示装置显示重载画面，目的在于减小重载画面的功耗。但是，在减小重载画面功耗的同时，也需要考虑重载画面的显示效果。因此，在将第一伽马电压调整为第二伽马电压的同时，使得第二伽马电压满足目标伽马曲线，可以提高显示效果和用户体验。
104、根据所述第二伽马电压驱动所述显示装置显示所述待显示画面。
其中，第一伽马电压和第二伽马电压存储在存储单元中的不同地址位置。如果显示装置中的PMIC是分离式的，则存储单元设置在PMIC内部。如果是三合一的PMIC，即PMIC、Level-shift IC（电平转换芯片）以及GAMMA IC（伽马芯片）集成在同一芯片内。则存储单元可以是外置的EEPROM（Electrically Erasable Programmable read only memory，电可擦可编程只读存储器）或者flash（闪存）。当待显示画面为重载画面时，时序控制芯片调用存储单元中的第二伽马电压。然后，时序控制芯片通过I2C（Inter-Integrated Circuit，集成电路总线，又称为IIC）向PMIC下达指令，PMIC收到指令后将第二伽马电压输出至源极驱动芯片。源极驱动芯片通过数据线将第二伽马电压输出至显示面板，以显示重载画面。
此外，若待显示画面为非重载画面，时序控制芯片通过I2C启动调用存储单元中的第一伽马电压。源极驱动芯片根据第一伽马电压，驱动显示装置显示待显示画面。
在本申请一些实施例中，请参阅图6，图6是本申请提供的显示装置的第一结构示意图。其中，显示装置100包括源极驱动芯片31和显示面板30。源极驱动芯片31用于将第一伽马电压或第二伽马电压输出至显示面板30。
与图1所示的显示装置的驱动方法的不同之处在于，在本实施例中，显示装置的驱动方法还包括以下步骤：
105、获取源极驱动芯片的驱动电压，所述源极驱动芯片用于输出所述第一伽马电压或所述第二伽马电压。
其中，源极驱动芯片31在驱动电压的驱动下正常工作。源极驱动芯片31通过数据线将第一伽马电压或第二伽马电压输出至显示面板30。源极驱动芯片31的数量可根据显示面板30的尺寸以及像素分辨率进行设置。
106、若所述待显示画面为重载画面，降低所述驱动电压的电压值。
可以理解的是，每一源极驱动芯片31需要在一定范围的驱动电压VDD的驱动下才能正常工作。因此，在显示装置100显示重载画面时，还可以通过降低源极驱动芯片31的驱动电压VDD，降低显示装置100的功耗以及源极驱动芯片31的温度。比如，源极驱动芯片31的驱动电压VDD可以在2.9V-3.3V的范围内进行调整。
进一步的，请参阅图7，图7是本申请提供的显示装置的第二结构示意图。其中，显示装置100包括背光模组32和显示面板30。背光模组32用于提供背光至显示面板30。
与图1所示的显示装置的驱动方法的不同之处在于，在本实施例中，显示装置的驱动方法还包括以下步骤：
107、若所述待显示画面为重载画面，提高所述显示装置的背光亮度。
由上述实施例可知，降低重载画面的功耗，重载画面的整体画面亮度会有所降低。通常，根据实测数据，当重载画面功耗降低为原来的80%时，整体亮度降低10%左右。
因此，为了在降低重载画面功耗的同时，保证重载画面的显示亮度整体不变，本实施例在根据第二伽马电压驱动显示装置100显示重载画面时，提高背光模组32的背光亮度，可以提高重载画面的亮度，从而补偿由于驱动电压减小导致的亮度降低。
具体的，可以通过增大背光模组32中的光源驱动电压，增大背光源的驱动电流，进而提高背光模组32的背光亮度。当然，本申请并不限于此，具体可根据背光模组32的光源结构选择提高背光亮度的方式。
进一步的，在本申请一些实施例中，显示装置100还包括时序控制芯片33。时序控制芯片33与背光模组32连接。若待显示画面为重载画面，时序控制芯片33发送一控制信号至背光模组32。背光模组32基于控制信号提高背光亮度。本实施例通过在时序控制芯片33和背光模组32之间建立通讯关系，可以在时序控制芯片33识别到重载画面时，及时反馈控制信号至背光模组32，从而对背光模组32的背光亮度进行调控。
相应的，本申请还提供一种显示装置，其在上述任一实施例所述的显示装置的驱动方法的驱动下显示待显示画面。显示装置的驱动方法可参阅上述实施例，在此不再赘述。
本申请中的显示装置可以是智能手机、平板电脑、视频播放器、个人计算机（PC）等，本申请对此不作限定。
具体的，请参阅图8，图8是本申请提供的显示装置的第三结构示意图。其中，显示装置100包括：获取模块11、检测模块12、调整模块13以及驱动模块14。具体如下：
（1）获取模块11；
获取模块11用于获取待显示画面。通常，获取模块11可以设置在时序控制芯片内。时序控制芯片内部可设置存储单元，以存储待显示画面的相关信息。
（2）检测模块12；
检测模块12用于判断待显示画面是否为重载画面。具体的，检测模块12可以对解析出的待显示画面的数据信息进行处理，得到待显示画面的每一子像素的显示灰阶。根据显示灰阶与显示亮度的关系可以得到待显示画面的亮度分布特征。然后，根据待显示画面的亮度分布特征判断待显示画面是否为重载画面。
具体的，检测模块12可以侦测显示装置100的像素驱动架构类型。然后，根据像素驱动架构类型确定重载画面的亮度分布特征。并将重载画面的亮度分布特征输入时序控制芯片内。最后，将待显示画面的亮度分布特征与重载画面的亮度分布特征进行比较。若待显示画面的亮度分布特征与重载画面的亮度分布特征相同，则判断待显示画面为重载画面。若待显示画面的亮度分布特征与重载画面的亮度分布特征不相同，则判断待显示画面为非重载画面。
其中，重载画面的亮度分布特征可参阅上述实施例，在此不再赘述。
（3）调整模块13；
调整模块13用于根据重载画面的亮度分布特征，判断待显示画面是否为重载画面。若待显示画面为重载画面，将待显示画面对应的第一伽马电压调整为第二伽马电压。同一灰阶对应的第二伽马电压小于第一伽马电压。
具体的，在一些实施例中，调整模块13可以通过减小模拟电源电压的电压值，以将第一伽马电压调整为第二伽马电压。其中，模拟电源电压用于产生第一伽马电压，具体可参阅上述实施例，在此不再赘述。
在另一些实施例中，调整模块13可以根据重载画面的功耗与预设功耗的差值，减小每一灰阶对应的所述第一伽马电压，以得到每一灰阶对应的第二伽马电压。
进一步的，可以对第二伽马电压进行调整，使其满足目标伽马电压曲线。从而在减小重载画面功耗的同时，提高显示效果和用户体验。
可选的，若待显示画面为重载画面，调整模块13还可以通过降低驱动电压的电压值，降低显示装置100的功耗。其中，驱动电压用于驱动源极驱动芯片正常工作。源极驱动芯片用于输出第一伽马电压或第二伽马电压。
可选的，若待显示画面为重载画面，调整模块13还可以提高显示装置100的背光亮度。可以理解的是，降低重载画面的功耗，重载画面的整体画面亮度会有所降低。因此，为了在降低重载画面功耗的同时，保证重载画面的显示亮度整体不变，本实施例在根据第二伽马电压驱动显示装置100显示重载画面时，提高背光模组32的背光亮度，可以提高重载画面的亮度，从而补偿由于驱动电压减小导致的亮度降低。
（4）驱动模块14；
当待显示画面为重载画面时，驱动模块14用于根据第二伽马电压驱动显示装置100显示重载画面。当待显示画面为非重载画面时，驱动模块14用于根据第一伽马电压，驱动显示装置100显示非重载画面。
本申请提供一种显示装置100，显示装置100可通过一显示装置的驱动方法进行画面显示。该显示装置100的驱动方法包括：首先获取待显示画面。然后，判断待显示画面是否为重载画面。若待显示画面为重载画面，将待显示画面对应的第一伽马电压调整为第二伽马电压。其中，同一灰阶对应的第二伽马电压小于第一伽马电压。最后，根据第二伽马电压驱动显示装置显示待显示画面。本申请能够降低显示装置100在显示重载画面时的功耗，避免因源极驱动芯片的温度升高影响显示质量，同时降低生产成本。
以上对本申请提供的显示装置及其驱动方法进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种显示装置的驱动方法，其包括：
    获取待显示画面；
    判断所述待显示画面是否为重载画面；
    若所述待显示画面为重载画面，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值；
    根据所述第二伽马电压驱动所述显示装置显示所述待显示画面。
  2. 根据权利要求1所述的显示装置的驱动方法，其中，所述将所述待显示画面对应的第一伽马电压调整为第二伽马电压的步骤包括：
    获取所述显示装置的模拟电源电压，所述模拟电源电压用于产生所述第一伽马电压；
    减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压。
  3. 根据权利要求2所述的显示装置的驱动方法，其中，所述减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压的步骤包括：
    将所述模拟电源电压减小至第一电压；
    获取所述显示装置的功耗，若所述显示装置的功耗小于预设功耗，基于所述第一电压，输出所述第二伽马电压；
    若所述显示装置的功耗大于所述预设功耗，继续减小所述模拟电源电压，直至所述显示装置的功耗小于所述预设功耗。
  4. 根据权利要求1所述的显示装置的驱动方法，其中，所述将所述第一伽马电压调整为第二伽马电压的步骤包括：
    根据重载画面的功耗与预设功耗的差值，减小每一所述灰阶对应的所述第一伽马电压，以得到每一所述灰阶对应的所述第二伽马电压。
  5. 根据权利要求1所述的显示装置的驱动方法，其中，所述显示装置的驱动方法还包括：
    获取源极驱动芯片的驱动电压，所述源极驱动芯片用于输出所述第一伽马电压或所述第二伽马电压；
    若所述待显示画面为重载画面，降低所述驱动电压的电压值。
  6. 根据权利要求1所述的显示装置的驱动方法，其中，所述显示装置的驱动方法还包括：
    若所述待显示画面为重载画面，提高所述显示装置的背光亮度。
  7. 根据权利要求1所述的显示装置的驱动方法，其中，所述判断所述待显示画面是否为重载画面的步骤包括：
    获取重载画面的亮度分布特征；
    获取所述待显示画面的亮度分布特征；
    将所述重载画面的亮度分布特征与所述待显示画面的亮度分布特征进行比对，若所述重载画面的亮度分布特征与所述待显示画面的亮度分布特征相同，则判断所述待显示画面为重载画面。
  8. 根据权利要求7所述的显示装置的驱动方法，其中，所述获取重载画面的亮度分布特征的步骤包括：
    获取所述显示装置的像素驱动架构类型；
    根据所述像素驱动架构类型确定所述重载画面的亮度分布特征。
  9. 根据权利要求1所述的显示装置的驱动方法，其中，所述显示装置的驱动方法还包括：
    若所述待显示画面为非重载画面，根据所述第一伽马电压驱动所述显示装置显示所述待显示画面。
  10. 根据权利要求1所述的显示装置的驱动方法，其中，所述根据所述第二伽马电压驱动所述显示装置显示所述待显示画面的步骤之前还包括：
    根据目标伽马曲线对所述第二伽马电压进行伽马校正。
  11. 一种显示装置的驱动方法，其包括：
    获取待显示画面以及所述待显示画面的亮度分布特征；
    获取重载画面的亮度分布特征；
    根据所述待显示画面的亮度分布特征和所述重载画面的亮度分布特征，判断所述待显示画面是否为重载画面；
    若所述待显示画面为重载画面，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值；
    根据所述第二伽马电压驱动所述显示装置显示所述待显示画面；
    若所述待显示画面为非重载画面，根据所述第一伽马电压驱动所述显示装置显示所述待显示画面。
  12. 根据权利要求11所述的显示装置的驱动方法，其中，所述将所述待显示画面对应的第一伽马电压调整为第二伽马电压的步骤包括：
    获取所述显示装置的模拟电源电压，所述模拟电源电压用于产生所述第一伽马电压；
    减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压。
  13. 根据权利要求12所述的显示装置的驱动方法，其中，所述减小所述模拟电源电压的电压值，以将所述第一伽马电压调整为所述第二伽马电压的步骤包括：
    将所述模拟电源电压减小至第一电压；
    获取所述显示装置的功耗，若所述显示装置的功耗小于预设功耗，基于所述第一电压，输出所述第二伽马电压；
    若所述显示装置的功耗大于所述预设功耗，继续减小所述模拟电源电压，直至所述显示装置的功耗小于所述预设功耗。
  14. 根据权利要求11所述的显示装置的驱动方法，其中，所述将所述第一伽马电压调整为第二伽马电压的步骤包括：
    根据重载画面的功耗与预设功耗的差值，减小每一所述灰阶对应的所述第一伽马电压，以得到每一所述灰阶对应的所述第二伽马电压。
  15. 根据权利要求11所述的显示装置的驱动方法，其中，所述显示装置的驱动方法还包括：
    获取源极驱动芯片的驱动电压，所述源极驱动芯片用于输出所述第一伽马电压或所述第二伽马电压；
    若所述待显示画面为重载画面，降低所述驱动电压的电压值。
  16. 根据权利要求11所述的显示装置的驱动方法，其中，所述显示装置的驱动方法还包括：
    若所述待显示画面为重载画面，提高所述显示装置的背光亮度。
  17. 根据权利要求11所述的显示装置的驱动方法，其中，所述获取重载画面的亮度分布特征的步骤包括：
    获取所述显示装置的像素驱动架构类型；
    根据所述像素驱动架构类型确定所述重载画面的亮度分布特征。
  18. 一种显示装置，其包括：
    获取模块，用于获取待显示画面；
    检测模块，用于判断所述待显示画面是否为重载画面；
    调整模块，用于当所述待显示画面为重载画面时，将所述待显示画面对应的第一伽马电压调整为第二伽马电压，其中，同一灰阶对应的所述第二伽马电压的电压值小于所述第一伽马电压的电压值；
    驱动模块，用于根据所述第二伽马电压驱动所述显示装置显示所述待显示画面。
  19. 根据权利要求18所述的显示装置，其中，所述调整模块还用于根据目标伽马电压曲线对所述第二伽马电压进行调整。
  20. 根据权利要求18所述的显示装置，其中，所述调整模块还用于当所述待显示画面为重载画面时，提高所述显示装置的背光亮度。
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