WO2020253311A1 - 显示面板的亮度补偿方法及装置、显示面板、存储介质 - Google Patents

显示面板的亮度补偿方法及装置、显示面板、存储介质 Download PDF

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WO2020253311A1
WO2020253311A1 PCT/CN2020/082166 CN2020082166W WO2020253311A1 WO 2020253311 A1 WO2020253311 A1 WO 2020253311A1 CN 2020082166 W CN2020082166 W CN 2020082166W WO 2020253311 A1 WO2020253311 A1 WO 2020253311A1
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display
brightness
attenuation
partition
difference
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PCT/CN2020/082166
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English (en)
French (fr)
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艾金钦
文锦松
张亦扬
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华为技术有限公司
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Publication of WO2020253311A1 publication Critical patent/WO2020253311A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • G09G3/342Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/04Maintaining the quality of display appearance
    • G09G2320/043Preventing or counteracting the effects of ageing
    • G09G2320/048Preventing or counteracting the effects of ageing using evaluation of the usage time
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness

Definitions

  • This application relates to the field of display technology, and in particular to a method and device for brightness compensation of a display panel, a display panel, and a storage medium.
  • the display device in the display panel will suffer from aging, which will cause the problem of brightness attenuation of the display panel.
  • the aging degree of the display device at the different positions is different, resulting in different brightness attenuation degrees of the display device at different positions, and affecting the display uniformity of the display panel. Therefore, the brightness compensation of the display panel is of great significance for improving the display uniformity of the display panel.
  • the brightness of each pixel in the display panel can be measured in advance during the experiment during different usage periods to obtain the brightness attenuation degree of each pixel during the corresponding usage period, and according to the different usage of each pixel
  • the degree of brightness attenuation during the duration, and the corresponding relationship between the degree of brightness attenuation and the duration of use is summarized.
  • the use duration of each pixel can be obtained first, and the corresponding relationship can be queried according to the use duration to obtain the brightness attenuation degree of the corresponding pixel, and then the brightness of the pixel is compensated according to the brightness attenuation degree.
  • the brightness attenuation degree of the pixel is determined according to the display brightness presented by the pixel and the target brightness when the pixel is driven to display according to the target brightness under certain display conditions.
  • the brightness attenuation degree of the pixel may change with the display condition, resulting in lower accuracy of brightness compensation for the brightness attenuation degree determined according to the corresponding relationship.
  • This application provides a method and device for brightness compensation of a display panel, a display panel, and a storage medium, which can solve the problem of low accuracy of brightness compensation in related technologies.
  • the technical solutions provided by this application are as follows:
  • this application provides a method for brightness compensation of a display panel, including: obtaining usage parameters of each display partition in the display panel, the display panel has multiple display partitions, and the usage parameters reflect the historical usage of the display partitions ,
  • the use parameters include at least: backlight parameters; based on the mapping relationship between the use parameters and the brightness attenuation coefficient, the first brightness attenuation coefficient of each display partition is obtained separately, and the first brightness attenuation coefficient of the display partition is used to reflect the brightness attenuation degree of the display partition ; Based on the first brightness attenuation coefficient of the display partition, perform brightness compensation on the display partition.
  • the first brightness attenuation coefficient of each display zone is obtained respectively, and then the first brightness attenuation parameter of the display zone is adjusted
  • the corresponding display partition performs brightness compensation.
  • the use parameters include backlight parameters
  • the influence of the backlight value on the brightness attenuation degree can be considered, which improves the accuracy of obtaining the brightness attenuation degree, thereby improving the accuracy of brightness compensation.
  • the usage parameters include: the total usage time, the backlight value of the backlight source in the display zone, and the pixel value of the pixel in the display zone.
  • the mapping relationship characterizes the change of the brightness attenuation coefficient with time attenuation parameters, display attenuation parameters, attenuation constants, and usage parameters.
  • the time attenuation parameter is used to reflect the degree to which the brightness attenuation coefficient changes with the length of use.
  • the attenuation parameter is used to reflect the degree to which the brightness attenuation coefficient changes with the backlight value and the pixel value.
  • the value of the attenuation constant is equal to the value of the brightness attenuation coefficient when it is not affected by the use time, the backlight value and the pixel value.
  • the usage parameters include: using the total time t, using the average backlight D of the backlight source in the display subarea within the total time t, and using the pixel average L of the pixels in the display subarea within the total time t, the brightness attenuation coefficient S, Time attenuation parameter ⁇ , display attenuation parameter k and attenuation constant ⁇ 0 satisfy:
  • Dmax is the maximum backlight value of the backlight source in the display partition within the total time t
  • Lmax is the maximum pixel value of the pixel in the display partition within the total time t
  • is the gamma value of the display partition
  • exp() is Exponential function with natural constant e as the base.
  • each display subarea includes pixels of multiple colors, and the display colors of pixels of multiple colors are different. Since the attenuation of pixels of different colors is different, the mapping relationship of pixels of different colors can be different. Correspondingly, when obtaining the first brightness attenuation coefficients of pixels of different colors, the first brightness attenuation coefficients of pixels of any color in any display subarea can be obtained based on the usage parameters and mapping relationships of pixels of any color in any display subarea.
  • a brightness attenuation coefficient, a pixel of any color is any one of pixels of multiple colors;
  • performing brightness compensation on the display partition based on the first brightness attenuation coefficient of the display partition includes: performing brightness compensation on any color pixel in the display partition based on the first brightness attenuation coefficient of any color pixel in the display partition .
  • the method before performing brightness compensation on the display partitions based on the first brightness attenuation coefficient of the display partitions, the method further includes: respectively acquiring and controlling the display brightness of each display partition when the multiple display partitions are displayed according to the reference brightness; The display brightness of each display partition and the corresponding reference brightness determine the second brightness attenuation coefficient of each display partition.
  • the second brightness attenuation coefficient is used to reflect the attenuation degree of the display brightness relative to the corresponding reference brightness; when multiple display partitions
  • the mapping relationship is adjusted until the brightness attenuation difference determined according to the adjusted mapping relationship is within the first reference range, and the brightness attenuation difference is based on one or more of the multiple display partitions.
  • the second brightness attenuation coefficient and the first brightness attenuation coefficient of each display partition are determined; based on the adjusted mapping relationship, the first brightness attenuation coefficient is updated.
  • the adjusted mapping relationship can be more in line with the actual use of the display panel to be compensated, so that the mapping relationship is determined according to the updated mapping relationship.
  • the first brightness attenuation coefficient can better reflect the actual attenuation of the display panel, which effectively improves the accuracy of the acquired first brightness attenuation coefficient.
  • the process of implementing the brightness attenuation difference determined according to the adjusted mapping relationship within the first reference range may include: when the sum of the attenuation coefficient differences of one or more display partitions is greater than the reference difference threshold, adjusting the time attenuation parameter and Attenuation constant until the sum of the attenuation coefficient difference of one or more display zones determined according to the adjusted time attenuation parameter and attenuation constant is less than or equal to the reference difference threshold, and the attenuation coefficient difference of the display zone is the first of the display zone 2.
  • the adjustment process may further include: acquiring the first brightness attenuation ratio of the other two display partitions among the multiple display partitions, and the other two display partitions and the two display partitions There are one or two display partitions that are different; based on the adjusted time attenuation parameter, display attenuation parameter and attenuation constant, the second brightness attenuation ratio of the other two display partitions is obtained; when the first brightness attenuation ratio of the other two display partitions is When the second difference of the second brightness attenuation ratio is not within the third reference range, determine the time attenuation parameter, display attenuation parameter, and attenuation constant in the minimum gap parameter combination as the updated time attenuation parameter, display attenuation parameter, and attenuation, respectively constant;
  • the parameters in the minimum gap parameter combination make the difference function obtain the minimum value
  • the difference function is the absolute value of the third difference, the absolute value of the fourth difference, and the fifth
  • the sum of the absolute values of the difference, the third difference is the difference between the sum of the attenuation coefficient difference and the reference difference threshold
  • the fourth difference is the boundary value of the first difference and the second reference range of the two display zones
  • the fifth difference is the difference between the second difference of the other two display partitions and the boundary value of the third reference range.
  • the parameters in the minimum gap parameter combination are the parameters that make the difference function obtain the optimal solution, that is, the parameters in the minimum gap parameter combination are the multiple sets of parameter combinations that make the mapping relationship most suitable for the actual use of the display panel. It performs brightness compensation and can adjust the display uniformity of the display panel to the greatest extent.
  • the second brightness attenuation coefficient of the display partition is equal to the ratio of the display brightness of the display partition to the reference brightness corresponding to the display partition.
  • the first brightness attenuation ratio of the first display partition and the second display partition is equal to the ratio of the second brightness attenuation coefficient of the first display partition to the second brightness attenuation coefficient of the second display partition;
  • the second brightness attenuation ratio of the first display partition and the second display partition is equal to the ratio of the first brightness attenuation coefficient of the first display partition to the first brightness attenuation coefficient of the second display partition.
  • the process of implementing brightness compensation for the display partition includes: determining the compensation gain of the display partition based on the first brightness attenuation coefficient of the display partition, based on the display partition Compensation gain for the brightness compensation of the display partition.
  • the realization process of determining the compensation gain of the display partition includes: determining the compensation gain of the target display partition among the multiple display partitions as 1, and attenuating the first brightness of the target display partition
  • the ratio of the coefficient to the first brightness attenuation coefficient of other display partitions is determined as the compensation gain of the other display partitions, and the other display partitions are any display partitions of the multiple display partitions except the target display partition.
  • the display panel has a main display area, an auxiliary display area, and a bent display area between the main display area and the auxiliary display area, and the main display area is the target display area.
  • the main display partition is the display partition with the longest use time among the multiple display partitions of the display panel, the main display partition has the greatest aging degree. Compared with the difficulty of brightness compensation for other display partitions, the Compensation is difficult. Therefore, determining the compensation gain of the main display partition as 1 can effectively reduce the difficulty of compensating the brightness of the display panel.
  • the present application provides a brightness compensation device for a display panel, including:
  • the first acquisition module is used to acquire the usage parameters of each display zone in the display panel.
  • the display panel has multiple display zones.
  • the usage parameters reflect the historical usage of the display zones.
  • the usage parameters include at least: backlight parameters;
  • the second obtaining module is configured to obtain the first brightness attenuation coefficient of each display partition based on the mapping relationship between the usage parameter and the brightness attenuation coefficient, and the first brightness attenuation coefficient of the display partition is used to reflect the brightness attenuation degree of the display partition;
  • the compensation module is used to perform brightness compensation on the display partition based on the first brightness attenuation coefficient of the display partition.
  • the usage parameters include: the total usage time, the backlight value of the backlight source in the display zone, and the pixel value of the pixel in the display zone.
  • the mapping relationship represents the change of the brightness attenuation coefficient with time attenuation parameters, display attenuation parameters, attenuation constants, and usage parameters.
  • the time attenuation parameter is used to reflect the degree to which the brightness attenuation coefficient changes with the duration of use
  • the display attenuation parameters are used
  • the value of the attenuation constant is equal to the value of the brightness attenuation coefficient when it is not affected by the use time, the backlight value and the pixel value.
  • the usage parameters include: using the total time t, using the average backlight D of the backlight source in the display subarea within the total time t, and using the pixel average L of the pixels in the display subarea within the total time t, the brightness attenuation coefficient S, Time attenuation parameter ⁇ , display attenuation parameter k and attenuation constant ⁇ 0 satisfy:
  • Dmax is the maximum backlight value of the backlight source in the display partition within the total time t
  • Lmax is the maximum pixel value of the pixel in the display partition within the total time t
  • is the gamma value of the display partition
  • exp() is Exponential function with natural constant e as the base.
  • each display partition includes pixels of multiple colors, and the pixels of multiple colors have different display colors, and the second acquisition module is used for:
  • the first brightness attenuation coefficient of pixels of any color in any display partition is obtained.
  • the pixels of any color are among the pixels of multiple colors. Any kind
  • the compensation module is used to: based on the first brightness attenuation coefficient of the pixel of any color in the display partition, perform brightness compensation on the pixel of any color in the display partition.
  • the device further includes:
  • the third acquiring module is configured to acquire the display brightness of each display partition when controlling multiple display partitions to display according to the reference brightness;
  • the determining module is used to determine the second brightness attenuation coefficient of each display partition based on the display brightness of each display partition and the corresponding reference brightness.
  • the second brightness attenuation coefficient is used to reflect the attenuation degree of the display brightness relative to the corresponding reference brightness ;
  • the adjustment module is used to adjust the mapping relationship when the brightness attenuation difference of multiple display partitions is not within the first reference range until the brightness attenuation difference determined according to the adjusted mapping relationship is within the first reference range, and the brightness attenuation difference The value is determined based on the second brightness attenuation coefficient and the first brightness attenuation coefficient of one or more of the multiple display partitions;
  • the update module is used to update the first brightness attenuation coefficient based on the adjusted mapping relationship.
  • mapping relationship represents the change of the brightness attenuation coefficient with time attenuation parameters, display attenuation parameters, attenuation constants, and usage parameters.
  • the adjustment module is used to:
  • the attenuation coefficient difference of one or more display zones When the sum of the attenuation coefficient difference of one or more display zones is greater than the reference difference threshold, adjust the time attenuation parameter and attenuation constant until the attenuation of one or more display zones is determined according to the adjusted time attenuation parameter and attenuation constant
  • the sum of coefficient differences is less than or equal to the reference difference threshold, and the attenuation coefficient difference of the display area is the difference between the second brightness attenuation coefficient of the display area and the first brightness attenuation coefficient of the display area;
  • the first brightness attenuation ratio of the two display partitions is obtained.
  • the first brightness attenuation ratio is used to reflect the brightness attenuation difference of the two display partitions determined according to the display brightness degree;
  • the second brightness attenuation ratio is used to reflect the difference in brightness attenuation of the two display partitions determined according to the mapping relationship;
  • the adjustment module is also used to:
  • the time attenuation parameter, display attenuation parameter and attenuation constant in the minimum gap parameter combination are determined separately It is the updated time attenuation parameter, display attenuation parameter and attenuation constant;
  • the parameters in the minimum gap parameter combination make the difference function obtain the minimum value
  • the difference function is the absolute value of the third difference, the absolute value of the fourth difference, and the fifth
  • the sum of the absolute values of the difference, the third difference is the difference between the sum of the attenuation coefficient difference and the reference difference threshold
  • the fourth difference is the boundary value of the first difference and the second reference range of the two display zones
  • the fifth difference is the difference between the second difference of the other two display partitions and the boundary value of the third reference range.
  • the second brightness attenuation coefficient of the display partition is equal to the ratio of the display brightness of the display partition to the reference brightness corresponding to the display partition.
  • the first brightness attenuation ratio of the first display partition and the second display partition is equal to the ratio of the second brightness attenuation coefficient of the first display partition to the second brightness attenuation coefficient of the second display partition;
  • the second brightness attenuation ratio of the first display partition and the second display partition is equal to the ratio of the first brightness attenuation coefficient of the first display partition to the first brightness attenuation coefficient of the second display partition.
  • a compensation module for:
  • brightness compensation is performed on the display partition.
  • a compensation module for:
  • the display panel has a main display area, an auxiliary display area, and a bent display area between the main display area and the auxiliary display area, and the main display area is the target display area.
  • the present application provides a brightness compensation device for a display panel, the device includes: a processor and a memory;
  • the memory is used to store a computer program, and the computer program includes program instructions
  • the processor is used to call a computer program to implement the brightness compensation method of any display panel as in the first aspect.
  • the present application provides a display panel, which includes: the brightness compensation device of the display panel of the third aspect.
  • the present application provides a computer storage medium with instructions stored on the computer storage medium.
  • the instructions are executed by a processor, the brightness compensation method of the display panel as in any one of the first aspects is implemented.
  • FIG. 1 is a schematic structural diagram of a display panel provided by an exemplary embodiment of the present application.
  • FIG. 2 is a schematic diagram of a display panel with a folding screen provided by an exemplary embodiment of the present application
  • FIG. 3 is a flowchart of a method for brightness compensation of a display panel provided by an embodiment of the present application
  • FIG. 4 is a schematic diagram of an attenuation law curve of a display device provided by an exemplary embodiment of the present application.
  • FIG. 5 is a flowchart of adjusting the mapping relationship when the brightness attenuation difference of multiple display partitions is not within the first reference range according to an exemplary embodiment of the present application
  • Fig. 6 is a schematic structural diagram of a display engine provided by an exemplary embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a brightness compensation device for a display panel provided by an exemplary embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another brightness compensation device for a display panel provided by an exemplary embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another brightness compensation device for a display panel provided by an exemplary embodiment of the present application.
  • self-luminous display devices such as organic light emitting diode (OLED) display panels
  • OLED organic light emitting diode
  • the brightness attenuation degree of different pixels is different according to the display content and use time of the pixels. Its general performance is: the brightness attenuation of the pixel in the always-on state is large. At this time, the pixel with the large brightness attenuation leaves an afterimage in the display area where the pixel is located, commonly known as "burning", which affects the display performance of the display panel .
  • a mobile terminal with a folding screen usually has multiple display partitions. During its use, due to the different use time and content of different display partitions, the burn-in degree of different display partitions is inconsistent. The brightness of the display area varies greatly.
  • a recorder is added to the control circuit of the OLED large-screen TV to record the usage time of each pixel, and during brightness compensation, the corresponding relationship between the brightness attenuation and the usage time is queried according to the usage time of each pixel , To obtain the brightness attenuation degree of each pixel unit, and then perform brightness compensation on the corresponding pixel according to the brightness attenuation degree of each pixel.
  • the brightness attenuation determined in this way may be consistent with the actual use of the OLED large-screen TV to be compensated. There are large differences, resulting in low accuracy in determining the degree of brightness attenuation.
  • the embodiments of the present application provide a method and device for brightness compensation of a display panel, a display panel, and a storage medium, which are used to perform brightness compensation according to the brightness attenuation degree of different display partitions in the display panel, especially for different display partitions in a folding screen.
  • the brightness is compensated.
  • the structure of the display panel provided by the embodiment of the present application is first introduced below.
  • the display panel includes a plurality of gate lines G, a plurality of data lines D, and a plurality of pixels X surrounded by a plurality of data lines D and a plurality of gate lines G.
  • Each pixel X includes: a pixel circuit 1 and a light emitting circuit 2.
  • the light emitting circuit includes a light emitting device. When the pixel circuit is in the on state, the data signal from the data line D can be provided to the light emitting circuit through the pixel circuit. The data signal is used to charge the light-emitting circuit for the light-emitting circuit to emit light.
  • the display panel with the folding screen has multiple display partitions, and the multiple display partitions include: a main display partition, at least one auxiliary display partition, and a bent display partition located between the main display partition and each auxiliary display partition.
  • a display panel with a folding screen may have a main display partition, an auxiliary display partition, and a curved display partition, or a display panel with a folding screen may have a main display partition, two auxiliary display partitions, and two curved display partitions. Fold to show the partition.
  • the bent display partition can be bent. When only the main display partition is used, the bent display partition can be controlled to be in a bent state so that the auxiliary display partition is located on the non-display side of the main display partition.
  • the bending display area between the required auxiliary display area and the main display area can be controlled to be in a non-bending state, so that the main display area and the auxiliary display area to be used are in a non-bending state.
  • the display area of the main display area, the display area of the auxiliary display area, and the display area of the bent display area jointly constitute the display area of the display panel.
  • Figure 2 is a schematic diagram of a display panel with a folding screen. As shown in Figure 2, the display panel has a main display area, an auxiliary display area, and a curved display located between the main display area and the auxiliary display area. Partition.
  • Figure 2 is a schematic diagram of the bending display partition in a non-bending state. It can be seen that the display area of the display panel is composed of the display area of the main display partition, the display area of the auxiliary display partition and the display area of the bending display partition. constitute.
  • FIG. 3 is a flowchart of a method for brightness compensation of a display panel provided by an embodiment of the application. As shown in Figure 3, the method may include:
  • Step 301 Obtain usage parameters of each display partition in the display panel.
  • the display panel has multiple display partitions.
  • the display panel may be a display panel with a folding screen.
  • the display panel includes: a main display partition, an auxiliary display partition, and is located between the main display partition and the auxiliary display partition The bend of the display zone.
  • the usage parameters may include at least: backlight parameters.
  • the usage parameter may at least include: the total usage time, the backlight value of the backlight source in the display subarea, and the pixel value of the pixel in the display subarea.
  • the total use time may be the total time that the display partition is in the display state from the time when the display partition is used for the first time to the time when the use parameter is acquired.
  • the backlight value of the backlight source in the display partition is the backlight value of the backlight source that provides the backlight for the display partition within the total use time.
  • the pixel value of the pixel in the display subarea may be the pixel value presented by the pixel in the display subarea within the total use time.
  • the use parameter may also include: the temperature of the environment in which the display panel is in use. Since the display panel is in a high temperature environment, a low temperature environment, and a normal temperature environment, the aging degree of the device in the display panel is different. At this time, by obtaining the temperature of the environment where the display panel is in use, the display panel can be compensated for different temperatures. , In order to improve the accuracy of compensation for the display panel.
  • the usage parameter may also include: the number of times of folding.
  • the more the number of folding the greater the damage to the device in the display partition. Therefore, when the folding number of the folding screen exceeds the reference number threshold, the damage to the device in the display partition has reached a certain level, and the brightness compensation cannot be compensated at this time. The brightness degradation caused by damage to the display device. Therefore, by acquiring the number of folding times, the display partition can be compensated in a targeted manner, and the energy consumption due to useless compensation can be reduced.
  • Step 302 Based on the mapping relationship between the usage parameter and the brightness attenuation coefficient, obtain the first brightness attenuation coefficient of each display partition respectively, and the first brightness attenuation coefficient of the display partition is used to reflect the brightness attenuation degree of the display partition.
  • the mapping relationship can characterize the change of the brightness attenuation coefficient with time attenuation parameters, display attenuation parameters, attenuation constants, and usage parameters.
  • the time attenuation parameter is used to reflect the degree to which the brightness attenuation coefficient changes with the use time.
  • the display attenuation parameter is used to reflect the degree to which the brightness attenuation coefficient changes with the backlight value and the pixel value.
  • the value of the attenuation constant is equal to the value of the brightness attenuation coefficient when it is not affected by the use time, the backlight value and the pixel value.
  • the parameters used include: the total time used t, the average backlight value D of the backlight source in the display partition within the total time t, and the average pixel value L of the pixels in the display partition within the total time t, the brightness attenuation coefficient S,
  • the time attenuation parameter ⁇ , display attenuation parameter k and attenuation constant ⁇ 0 can satisfy:
  • Dmax is the maximum backlight value of the backlight source in the display partition within the total time t
  • Lmax is the maximum pixel value of the pixel in the display partition within the total time t
  • is the gamma value of the display partition
  • exp() is Exponential function with natural constant e as the base.
  • the pixel average value of each frame of image is the quotient of the sum of the pixel values of all pixels in the display area and the total number of pixels when the frame of image is displayed in the display area.
  • the mapping relationship of pixels of different colors can be different.
  • the first brightness attenuation coefficient of pixels of different colors is obtained, it can be based on the corresponding color
  • the pixel mapping relationship drives the first brightness attenuation coefficient of the pixel of the corresponding color.
  • the usage conditions of pixels of different colors are also different. Therefore, when it is necessary to perform brightness compensation on pixels of different colors, you can obtain any color in any display partition for any color pixel in any display partition. Then, based on the usage parameters and the mapping relationship of the pixels of any color in any display partition, the first brightness attenuation coefficients of the pixels of any color in any display partition are obtained. When the pixel of any color in any display partition is compensated, the pixel of any color in any display partition may be compensated based on the first brightness attenuation coefficient of the pixel of any color in the any display partition. Brightness compensation. Wherein, the pixel of any color is any one of the pixels of multiple colors. Moreover, by performing compensation for pixels of different colors, the fineness of compensation can be improved, and the accuracy of compensation can be further improved.
  • the brightness attenuation coefficient S, the time attenuation parameter ⁇ , the display attenuation parameter k, and the attenuation constant ⁇ 0 can be determined according to the attenuation law of the display device.
  • the attenuation law can be obtained by summarizing multiple sets of measurement data (such as big data) obtained from offline testing, and each set of measurement data can include: the attenuation coefficient measured at different use moments during the display process of the display device.
  • the attenuation law can be represented by a curve, and pixels of different colors have different attenuation speeds under different gray levels.
  • Fig. 4 is the attenuation law curve of the display device, as shown in Fig.
  • the abscissa is time, the unit is hour, the ordinate is the brightness attenuation coefficient of the display device, and the curve A1 is the red pixel, green pixel and When the blue pixel is mixed with white light, the attenuation law curve when the gray level is 255, and curve A2 is the attenuation law when the red, green, and blue pixels in the display panel are mixed with white light when the gray level is 216 Curve, curve A3 is the attenuation curve when the red pixel, green pixel and blue pixel in the display panel are mixed into white light, when the gray level is 164, curve A4 is the mixing of red pixel, green pixel and blue pixel in the display panel When the light is white light, the attenuation law curve when the gray level is 126, it can be seen from Figure 4: the larger the gray level, the faster the attenuation speed.
  • the time attenuation parameter ⁇ of a pixel of any color under a certain gray level can be equal to the slope of the attenuation law curve of the pixel of that color under a certain gray level, and the display attenuation parameter k is equal to the intercept of the curve on the x axis.
  • the change rate of the distance with the gray scale, the attenuation constant ⁇ 0 is equal to the intercept of the change rate of the intercept with the gray scale on the x axis.
  • Step 303 Obtain the display brightness of each display partition when controlling multiple display partitions to display according to the reference brightness.
  • the brightness of the display subarea is determined by the brightness of the pixels in the display subarea. Therefore, all pixels in the display subarea can be controlled to be displayed according to the reference brightness, so as to obtain the effect of controlling the display subarea to display according to the reference brightness.
  • the brightness of the pixel is determined by the amplitude of the data signal charged to the pixel. Therefore, the amplitude of the data signal provided to the pixel can be adjusted to control the pixel to display according to the reference brightness.
  • instruments such as optical probes or color analyzers can be used to measure on the display side of multiple display partitions to obtain the display brightness of each display partition.
  • Step 304 Determine a second brightness attenuation coefficient of each display partition based on the display brightness of each display partition and the corresponding reference brightness, where the second brightness attenuation coefficient is used to reflect the attenuation degree of the display brightness relative to the corresponding reference brightness.
  • the second brightness attenuation coefficient can be obtained according to the display brightness and the corresponding reference brightness.
  • the second brightness attenuation coefficient of the display partition may be equal to the ratio of the display brightness of the display partition to the reference brightness corresponding to the display partition.
  • Step 305 When the brightness attenuation difference of the multiple display partitions is not within the first reference range, adjust the mapping relationship until the brightness attenuation difference determined according to the adjusted mapping relationship is within the first reference range, and the brightness attenuation difference is It is determined based on the second brightness attenuation coefficient and the first brightness attenuation coefficient of one or more of the multiple display partitions.
  • the implementation process of this step 305 may include:
  • Step 3051 When the sum of the attenuation coefficient differences of one or more display zones is greater than the reference difference threshold, adjust the time attenuation parameter and attenuation constant until one or more displays are determined according to the adjusted time attenuation parameter and attenuation constant The sum of the attenuation coefficient differences of the partitions is less than or equal to the reference difference threshold.
  • the difference in the attenuation coefficient of the display partition is the difference between the second brightness attenuation coefficient of the display partition and the first brightness attenuation coefficient of the display partition.
  • the first brightness attenuation coefficient of display partition A is A%
  • the second brightness attenuation coefficient of display partition A is A%
  • display partition B The first brightness attenuation coefficient of display area B is B'%
  • the second brightness attenuation coefficient of display area B is B%
  • the first brightness attenuation coefficient of display area C is C'%
  • the second brightness attenuation coefficient of display area C is C%
  • the attenuation coefficient difference of the display area A is equal to A%-A'%
  • the attenuation coefficient difference of the display area B is equal to B%-B'%
  • the attenuation coefficient difference of the display area C is equal to C%-C'%
  • the sum of the difference of the attenuation coefficients of the three display zones is
  • the attenuation coefficient difference of the display partition may also be the second brightness attenuation coefficient of the display partition and the first brightness attenuation coefficient of the display partition.
  • the reference difference threshold may be determined according to actual needs. For example, the reference difference threshold may be 0.002.
  • the reference difference threshold may be 0.002.
  • the sum of the attenuation coefficient differences of one or more display partitions is greater than the reference difference threshold, it means that the attenuation degree reflected by the first brightness attenuation coefficient of the display partition is far from the second brightness attenuation coefficient.
  • the brightness compensation of the display partition is performed according to the first brightness attenuation coefficient, the display uniformity problem caused by the brightness attenuation may still not be solved.
  • the mapping relationship needs to be updated, and the display partitions are determined according to the updated mapping relationship. Brightness attenuation coefficient to improve the accuracy of brightness compensation for display partitions.
  • the display attenuation parameter can be kept unchanged, and the time attenuation parameter and the attenuation constant can be adjusted.
  • the time attenuation parameter and the attenuation constant can be adjusted respectively according to a fixed step.
  • the step length when adjusting the time attenuation parameter and the attenuation constant can be determined according to the value range of the two.
  • the value range of the time decay parameter can be [0,1]
  • the step length can be equal to 0.001
  • the value range of the attenuation constant can be [1000, 100,000]
  • the step length can be equal to 20.
  • Step 3052 based on the second brightness attenuation coefficients of the two display partitions among the multiple display partitions, obtain a first brightness attenuation ratio of the two display partitions, where the first brightness attenuation ratio is used to reflect the two display partitions determined according to the display brightness The degree of difference in brightness attenuation.
  • the difference between the attenuation degree reflected by the first brightness attenuation coefficient and the second brightness attenuation coefficient of the display zone can be determined again, and when the gap is large, adjust the display attenuation parameter.
  • the gap can be determined according to the difference in brightness attenuation of the two display partitions in the multiple display partitions.
  • the first brightness attenuation ratio and the second brightness attenuation ratio can be obtained. The difference is determined according to the first brightness attenuation ratio and the second brightness attenuation ratio to determine whether the display attenuation parameter needs to be adjusted.
  • the first brightness attenuation ratio of the first display partition and the second display partition may be equal to the first display partition The ratio of the second brightness attenuation coefficient of the second display area to the second brightness attenuation coefficient of the second display area.
  • the two display partitions may be any two display partitions among the multiple display partitions in the display panel.
  • the display panel is a display panel with a folding screen
  • one of the two display partitions may be the main display partition in the folding screen.
  • the main display partition is the display partition with the longest use time in the display panel, its brightness attenuation is the greatest.
  • the A brightness attenuation ratio when the mapping relationship is adjusted can make the adjusted mapping relationship more consistent with the usage of the display partition in the display panel, and the first brightness attenuation coefficient obtained according to the adjusted mapping relationship can more accurately reflect the display partition The degree of brightness attenuation.
  • Step 3053 Obtain a second brightness attenuation ratio of the two display partitions based on the adjusted time attenuation parameter and attenuation constant, where the second brightness attenuation ratio is used to reflect the difference in brightness attenuation of the two display partitions determined according to the mapping relationship.
  • the second brightness attenuation ratio of the first display partition and the second display partition is equal to the first brightness attenuation coefficient of the first display partition The ratio of the first brightness attenuation coefficient to the second display area.
  • Step 3054 When the first difference between the first brightness attenuation ratio and the second brightness attenuation ratio of the two display zones is not within the second reference range, adjust the display attenuation parameter until the first difference is determined according to the adjusted display attenuation parameter. The difference lies within the second reference range.
  • the attenuation degree reflected by the first brightness attenuation coefficient of the two display regions is quite different from the attenuation degree reflected by the second brightness attenuation coefficient.
  • the brightness compensation of the display partition is directly based on the first brightness attenuation coefficient determined by the adjusted time attenuation parameter and attenuation constant, the display uniformity problem caused by the brightness attenuation may still not be solved.
  • the display attenuation parameter when adjusting the display attenuation parameter, can also be adjusted according to a fixed step.
  • the step length when adjusting the display attenuation parameter can be determined according to the value range of the display attenuation parameter.
  • the value range of the display attenuation parameter can be [0,10], and the step length can be equal to 0.005.
  • the second reference range may be determined according to actual needs.
  • the second reference range may be [-T, T], and the value of T may be 0.003.
  • Step 3055 Obtain the first brightness attenuation ratios of the other two display partitions among the multiple display partitions, and the other two display partitions are different from one or two of the two display partitions.
  • the adjusted mapping relationship can also be verified.
  • the difference in brightness attenuation reflected by the display brightness of the other two display partitions can be determined according to the display brightness of the other two display partitions in the plurality of display partitions, and the other two display partitions can be determined according to the adjusted mapping relationship.
  • the brightness attenuation difference degree of the display partition reflected by the mapping relationship and then according to the brightness attenuation difference degree determined by the display brightness of the other two display partitions and the brightness attenuation difference degree determined by the mapping relationship, it is determined whether the adjusted mapping relationship conforms to the display panel According to the actual usage, determine whether the adjusted parameters are appropriate.
  • the degree of difference in brightness attenuation of the other two display regions reflected by the mapping relationship may be quantified using the first brightness attenuation ratio of the other two display regions.
  • the calculation method of the first brightness attenuation ratio can refer to the implementation method in step 3052 accordingly.
  • the other two display partitions are different from one or two of the two display partitions. That is, the other two display partitions may be different from the two display partitions in step 3052 to step 3054, or the other two display partitions may be different from one of the two display partitions in step 3052 to step 3054. different.
  • the display panel is a display panel with a folding screen
  • the folding screen includes a main display partition, an auxiliary display partition, and a bent display partition located in the main display partition and the auxiliary display partition
  • step 3052 The two display partitions in step 3054 may be the main display partition and the bending display partition
  • the other two display partitions may be the bending display partition and the auxiliary display partition.
  • Step 3056 Based on the adjusted time attenuation parameter, display attenuation parameter and attenuation constant, obtain the second brightness attenuation ratios of the other two display partitions.
  • the degree of difference in brightness attenuation of the other two display regions reflected by the mapping relationship can be quantified using the second brightness attenuation ratio of the other two display regions.
  • the calculation method of the second brightness attenuation ratio can refer to the implementation in step 3053 accordingly.
  • Step 3057 When the second difference between the first brightness attenuation ratio and the second brightness attenuation ratio of the other two display zones is not within the third reference range, combine the time attenuation parameter, display attenuation parameter, and attenuation in the minimum gap parameter combination
  • the constants are respectively determined as the updated time attenuation parameter, display attenuation parameter and attenuation constant.
  • the second difference between the first brightness attenuation ratio and the second brightness attenuation ratio of the other two display partitions is within the third reference range, it means that the adjusted mapping relationship conforms to the actual use of the display panel.
  • the time attenuation parameter, display attenuation parameter, and attenuation constant adjusted in steps 3051 to 3054 are determined as the updated time attenuation parameter, display attenuation parameter, and attenuation constant, respectively.
  • the time attenuation parameter, display attenuation parameter, and attenuation constant in the minimum gap parameter combination can be determined as the updated time attenuation parameter, display attenuation parameter, and attenuation constant, respectively.
  • the parameters in the minimum gap parameter combination are the parameters that make the difference function obtain the minimum value, that is, the parameters in the minimum gap parameter combination are the parameters that make the difference function obtain the optimal solution. That is, the parameters in the minimum gap parameter combination are the multiple sets of parameter combinations that make the mapping relationship most suitable for the actual use of the display panel. According to the brightness compensation, the display uniformity of the display panel can be adjusted to the greatest extent.
  • the difference function is the sum of the absolute value of the third difference, the absolute value of the fourth difference, and the absolute value of the fifth difference
  • the third difference is the sum of the attenuation coefficient difference
  • the fourth difference is the difference between the first difference of the two display areas and the boundary value of the second reference range
  • the fifth difference is the first difference of the other two display areas The difference between the second difference and the boundary value of the third reference range.
  • the third reference range may be determined according to actual needs.
  • the third reference range may be [-Z, Z], and the value of Z may be 0.004.
  • Step 306 Based on the adjusted mapping relationship, update the first brightness attenuation coefficient.
  • mapping relationship is characterized by the time attenuation parameter, the display attenuation parameter and the attenuation constant
  • the adjustment of the time attenuation parameter, the display attenuation parameter and the attenuation constant is completed, that is, the adjustment of the mapping relationship is completed.
  • the use parameters of the display partition can be brought into the mapping relationship after the adjustment parameters, so as to obtain the updated first brightness attenuation parameter.
  • the adjusted mapping relationship can be more in line with the actual use of the display panel to be compensated, so that the mapping relationship is determined according to the updated mapping relationship.
  • the first brightness attenuation coefficient can better reflect the actual attenuation of the display panel, which effectively improves the accuracy of the acquired first brightness attenuation coefficient.
  • Step 307 Determine the compensation gain of the display partition based on the first brightness attenuation coefficient of the display partition.
  • the compensation gain of the target display partition among the multiple display partitions may be determined as 1, and the first brightness attenuation coefficient of the target display partition may be compared with other display partitions.
  • the ratio of the first brightness attenuation coefficient is determined as the compensation gain of other display partitions, and the other display partitions are any display partitions of the multiple display partitions except the target display partition.
  • the display panel when the display panel is a display panel with a folding screen, the display panel may have a main display partition, an auxiliary display partition, and a bent display partition located between the main display partition and the auxiliary display partition, and the main display partition is the target display Partition. Since the main display partition is the display partition with the longest use time among the multiple display partitions of the display panel, the main display partition has the greatest aging degree. Compared with the difficulty of brightness compensation for other display partitions, the Compensation is difficult. Therefore, determining the compensation gain of the main display partition as 1 can effectively reduce the difficulty of compensating the brightness of the display panel.
  • Step 308 Perform brightness compensation on the display partition based on the compensation gain of the display partition.
  • brightness compensation can be performed on each display partition according to the compensation gain of each display partition.
  • the brightness compensation of the display panel can be divided into external compensation (such as gamma compensation) and internal compensation (such as Demura compensation).
  • the compensation gain can be sent to the gamma compensation module And Demura compensation module, according to the compensation gain of each display area, the corresponding display area is compensated by gamma and Demura.
  • Fig. 6 is a schematic structural diagram of a display engine module provided by an embodiment of the present application.
  • the display engine may include: a usage parameter acquisition module, a brightness attenuation coefficient acquisition module, and an internal compensation module, and the display engine is also connected to an external compensation module through a drive interface module.
  • the use parameter acquisition module includes: a read parameter submodule, a use parameter acquisition submodule, and a write parameter submodule.
  • the read parameter submodule can be connected to the information acquisition module in the mobile terminal.
  • the brightness attenuation coefficient acquisition module includes: a parameter statistics sub-module, a brightness attenuation coefficient acquisition sub-module, and a mapping relationship storage sub-module.
  • the parameter statistics sub-module may communicate with the parameter writing sub-module to obtain the parameters stored by the parameter writing sub-module, and the parameter statistics sub-module may obtain the parameters at a specified time. For example, the parameter statistics sub-module may obtain parameters from the write parameter sub-module every 100 seconds.
  • the brightness attenuation coefficient acquisition submodule may also calculate the brightness attenuation coefficient at a specified time according to the parameters acquired by the parameter statistics submodule and the mapping relationship stored in the mapping relationship storage submodule.
  • the brightness attenuation coefficient obtaining submodule may periodically calculate the brightness attenuation coefficient according to the parameters obtained by the parameter statistics submodule and the mapping relationship stored in the mapping relationship storage submodule.
  • the internal compensation module may be a Demura compensation module.
  • the Demura compensation module may perform brightness compensation on the display partition by looking up a table, and the external compensation module may be a gamma compensation module.
  • the display panel can be provided with an external compensation module (such as Demura module) for external compensation and an internal compensation module for internal compensation. Therefore, after obtaining the compensation gain of each display partition, you can change the The compensation gains are respectively input to the external compensation module and the internal compensation module, so that the external compensation module and the internal compensation module perform brightness compensation on the corresponding display partition according to the compensation gain of each display partition.
  • an external compensation module such as Demura module
  • an internal compensation module for internal compensation. Therefore, after obtaining the compensation gain of each display partition, you can change the The compensation gains are respectively input to the external compensation module and the internal compensation module, so that the external compensation module and the internal compensation module perform brightness compensation on the corresponding display partition according to the compensation gain of each display partition.
  • steps 303 to step 305 are optional steps. You can choose whether to perform step 303 to step 305 according to the actual situation, and when step 303 to step 305 are not performed, you can directly perform each step in step 306.
  • the mapping relationship between the usage parameter of the display partition and the brightness attenuation coefficient is obtained, and the first brightness attenuation coefficient of the corresponding display partition is obtained.
  • the brightness compensation method of the display panel obtained by the embodiments of the present application obtains the usage parameters of each display zone, and according to the usage parameters based on the mapping relationship between the usage parameters and the brightness attenuation coefficient, each display zone is obtained separately.
  • the first brightness attenuation coefficient of the display partition is then compensated for the corresponding display partition according to the first brightness attenuation parameter of the display partition.
  • the brightness compensation of each display partition is performed according to the use parameters of the display partition.
  • the brightness compensation of each pixel is performed according to the relevant parameters of each pixel, which simplifies the difficulty of obtaining parameters and the complexity of compensation.
  • the use parameters include backlight parameters
  • the influence of the backlight value on the brightness attenuation degree can be considered, which improves the accuracy of obtaining the brightness attenuation degree, thereby improving the accuracy of brightness compensation.
  • mapping relationship can be adjusted according to the display brightness of the display partition
  • the adjusted mapping relationship is more in line with the actual use of the display partition. Therefore, the mapping relationship obtained according to the adjusted mapping relationship The accuracy of brightness attenuation further improves the accuracy of brightness compensation.
  • the embodiment of the present application provides a brightness compensation device for a display panel.
  • the brightness compensation device 700 for the display panel may include:
  • the first obtaining module 701 is configured to obtain usage parameters of each display zone in the display panel.
  • the display panel has multiple display zones.
  • the usage parameters reflect the historical usage of the display zones.
  • the usage parameters may include at least backlight parameters.
  • the second obtaining module 702 is configured to obtain the first brightness attenuation coefficient of each display partition based on the mapping relationship between the usage parameter and the brightness attenuation coefficient, and the first brightness attenuation coefficient of the display partition is used to reflect the brightness attenuation degree of the display partition.
  • the compensation module 703 is configured to perform brightness compensation on the display partition based on the first brightness attenuation coefficient of the display partition.
  • the brightness compensation device of the display panel obtained by the embodiment of the present application obtains the usage parameters of each display partition through the first obtaining module, and the second obtaining module is based on the usage parameters based on the mapping relationship between the usage parameters and the brightness attenuation coefficient , Respectively obtain the first brightness attenuation coefficient of each display partition, and the compensation module performs brightness compensation on the corresponding display partition according to the first brightness attenuation parameter of the display partition.
  • the related technology it is based on the use parameters of the display partition.
  • the brightness compensation is performed on each display partition, and there is no need to perform brightness compensation on each pixel according to the related parameters of each pixel, which simplifies the difficulty of obtaining parameters and the complexity of compensation.
  • the use parameters include backlight parameters
  • the influence of the backlight value on the brightness attenuation degree can be considered, which improves the accuracy of obtaining the brightness attenuation degree, thereby improving the accuracy of brightness compensation.
  • the usage parameters may include: the total usage time, the backlight value of the backlight source in the display subarea, and the pixel value of the pixels in the display subarea.
  • the mapping relationship represents the change of the brightness attenuation coefficient with time attenuation parameters, display attenuation parameters, attenuation constants, and usage parameters.
  • the time attenuation parameter is used to reflect the degree to which the brightness attenuation coefficient changes with the duration of use
  • the display attenuation parameters are used
  • the value of the attenuation constant is equal to the value of the brightness attenuation coefficient when it is not affected by the use time, the backlight value and the pixel value.
  • the usage parameters may include: using the total duration t, using the average backlight value D of the backlight sources in the display subarea within the total duration t, and using the average pixel value L of the pixels in the display subarea within the total duration t, and the brightness attenuation coefficient S , Time attenuation parameter ⁇ , display attenuation parameter k and attenuation constant ⁇ 0 satisfy:
  • Dmax is the maximum backlight value of the backlight source in the display partition within the total time t
  • Lmax is the maximum pixel value of the pixel in the display partition within the total time t
  • is the gamma value of the display partition
  • exp() is Exponential function with natural constant e as the base.
  • each display subarea may include pixels of multiple colors, and the pixels of multiple colors have different display colors.
  • the second acquisition module 702 is configured to:
  • the first brightness attenuation coefficient of pixels of any color in any display partition is obtained, and the pixels of any color are among the pixels of multiple colors. Any kind.
  • the compensation module 703 is configured to: perform brightness compensation on the pixels of any color in the display partition based on the first brightness attenuation coefficient of the pixels of any color in the display partition.
  • the apparatus 700 may further include:
  • the third acquiring module 704 is configured to respectively acquire the display brightness of each display partition when controlling multiple display partitions to display according to the reference brightness.
  • the determining module 705 is configured to determine the second brightness attenuation coefficient of each display partition based on the display brightness of each display partition and the corresponding reference brightness, and the second brightness attenuation coefficient is used to reflect the attenuation of the display brightness relative to the corresponding reference brightness degree.
  • the adjustment module 706 is configured to adjust the mapping relationship when the brightness attenuation difference of the multiple display partitions is not within the first reference range until the brightness attenuation difference determined according to the adjusted mapping relationship is within the first reference range, and the brightness attenuation The difference value is determined based on the second brightness attenuation coefficient and the first brightness attenuation coefficient of one or more of the plurality of display partitions.
  • the update module 707 is configured to update the first brightness attenuation coefficient based on the adjusted mapping relationship.
  • the adjustment module 706 is used to:
  • the attenuation coefficient difference of one or more display zones When the sum of the attenuation coefficient difference of one or more display zones is greater than the reference difference threshold, adjust the time attenuation parameter and attenuation constant until the attenuation of one or more display zones is determined according to the adjusted time attenuation parameter and attenuation constant
  • the sum of the coefficient differences is less than or equal to the reference difference threshold, and the attenuation coefficient difference of the display partition is the difference between the second brightness attenuation coefficient of the display partition and the first brightness attenuation coefficient of the display partition.
  • the first brightness attenuation ratio of the two display partitions is obtained.
  • the first brightness attenuation ratio is used to reflect the brightness attenuation difference of the two display partitions determined according to the display brightness degree.
  • the second brightness attenuation ratio of the two display partitions is obtained, and the second brightness attenuation ratio is used to reflect the difference in brightness attenuation of the two display partitions determined according to the mapping relationship.
  • the adjustment module 706 is also used for:
  • the time attenuation parameter, display attenuation parameter and attenuation constant in the minimum gap parameter combination are determined separately It is the updated time attenuation parameter, display attenuation parameter and attenuation constant.
  • the parameters in the minimum gap parameter combination make the difference function obtain the minimum value
  • the difference function is the absolute value of the third difference, the absolute value of the fourth difference, and the fifth
  • the sum of the absolute values of the difference, the third difference is the difference between the sum of the attenuation coefficient difference and the reference difference threshold
  • the fourth difference is the boundary value of the first difference and the second reference range of the two display zones
  • the fifth difference is the difference between the second difference of the other two display partitions and the boundary value of the third reference range.
  • the second brightness attenuation coefficient of the display partition is equal to the ratio of the display brightness of the display partition to the reference brightness corresponding to the display partition.
  • the first brightness attenuation ratio of the first display partition and the second display partition is equal to the ratio of the second brightness attenuation coefficient of the first display partition to the second brightness attenuation coefficient of the second display partition.
  • the second brightness attenuation ratio of the first display partition and the second display partition is equal to the ratio of the first brightness attenuation coefficient of the first display partition to the first brightness attenuation coefficient of the second display partition.
  • the compensation module 703 is used to:
  • the compensation gain of the display partition is determined.
  • brightness compensation is performed on the display partition.
  • the compensation module 703 determines the compensation gain of the display partition based on the first brightness attenuation coefficient of the display partition, including:
  • the display panel has a main display area, an auxiliary display area, and a bent display area between the main display area and the auxiliary display area, and the main display area is the target display area.
  • the brightness compensation device of the display panel obtained by the embodiment of the present application obtains the usage parameters of each display partition through the first obtaining module, and the second obtaining module is based on the usage parameters based on the mapping relationship between the usage parameters and the brightness attenuation coefficient , Respectively obtain the first brightness attenuation coefficient of each display partition, and the compensation module performs brightness compensation on the corresponding display partition according to the first brightness attenuation parameter of the display partition.
  • the related technology it is based on the use parameters of the display partition.
  • the brightness compensation is performed on each display partition, and there is no need to perform brightness compensation on each pixel according to the related parameters of each pixel, which simplifies the difficulty of obtaining parameters and the complexity of compensation.
  • the use parameters include backlight parameters
  • the influence of the backlight value on the brightness attenuation degree can be considered, which improves the accuracy of obtaining the brightness attenuation degree, thereby improving the accuracy of brightness compensation.
  • mapping relationship can be adjusted according to the display brightness of the display partition
  • the adjusted mapping relationship is more in line with the actual use of the display partition. Therefore, the mapping relationship obtained according to the adjusted mapping relationship The accuracy of brightness attenuation further improves the accuracy of brightness compensation.
  • the embodiment of the present application also provides a brightness compensation device 900 of a display panel.
  • the brightness compensation device 900 of the display panel includes a processor 910, a communication interface 920, a memory 930 and a driving integrated circuit (in FIG. Not shown).
  • the processor 910, the communication interface 920, and the memory 930 are connected to each other through a bus 940.
  • the bus 940 can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the memory 930 may include a volatile memory (volatile memory), such as a random-access memory (random-access memory, RAM); the memory 930 may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory). memory), a hard disk drive (HDD) or a solid-state drive (SSD); the memory 930 may also include a combination of the foregoing types of memories.
  • volatile memory such as a random-access memory (random-access memory, RAM
  • non-volatile memory such as a flash memory (flash memory).
  • flash memory flash memory
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 930 is used to store the mapping relationship, or the corresponding relationship between the gray scale and the driving signal, and the like.
  • the processor 910 may be a hardware chip, and completes the function of the brightness compensation device of the display panel in the brightness compensation method of the display panel provided in the embodiment of the present application.
  • the aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
  • the processor 910 may also be a general-purpose processor, for example, a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the memory 930 is also used to store program instructions.
  • the processor 910 calls the program instructions stored in the memory 930 to execute one or more steps in the brightness compensation method of the display panel provided in the embodiment of the present application, or the The selected embodiment enables the brightness compensation device 900 of the display panel to implement the above-mentioned brightness compensation method of the display panel.
  • An embodiment of the present application also provides a display panel, and the display panel may include the brightness compensation device of the display panel provided in the foregoing embodiment.
  • the display panel can be: watches, LCD panels, electronic paper, mobile phones, tablet computers, televisions, monitors, notebook computers, digital photo frames, navigators and other products or components with display functions.
  • the display panel may be an OLED display panel.
  • the embodiment of the present application also provides a storage medium, which may be a non-volatile computer-readable storage medium.
  • a storage medium which may be a non-volatile computer-readable storage medium.
  • the electronic device can execute the implementation of the present application.
  • the example provides the brightness compensation method of the display panel.
  • the embodiments of the present application also provide a computer program product containing instructions.
  • the computer program product runs on a computer, the computer executes the brightness compensation method of the display panel provided in the embodiments of the present application.
  • An embodiment of the present application also provides a chip, which includes a programmable logic circuit and/or program instructions, which is used to implement the brightness compensation method of the display panel provided by the embodiment of the present application when the chip is running.

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Abstract

一种显示面板的亮度补偿方法,包括:获取显示面板中每个显示分区的使用参数,显示面板具有多个显示分区,使用参数用于反映显示分区的历史使用情况,使用参数至少包括:背光参数(301);基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,显示分区的第一亮度衰减系数用于反映显示分区的亮度衰减程度(302);基于显示分区的第一亮度衰减系数,对显示分区进行亮度补偿(307,308)。亮度补偿方法及其装置、显示面板、存储介质,涉及显示技术领域,简化了获取参数的难度和补偿的复杂度,并提高了亮度补偿的准确性,用于对显示面板的亮度进行补偿。

Description

显示面板的亮度补偿方法及装置、显示面板、存储介质
本申请要求于2019年6月20日提交的申请号为201910538892.3、发明名称为“显示面板的亮度补偿方法及装置、显示面板、存储介质”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域,尤其涉及一种显示面板的亮度补偿方法及装置、显示面板、存储介质。
背景技术
在显示面板的使用过程中,显示面板中的显示器件会出现老化的问题,会导致显示面板出现亮度衰减的问题。且根据不同位置处显示器件的使用情况,该不同位置处显示器件的老化程度不同,导致不同位置处显示器件的亮度衰减程度不同,影响显示面板的显示均一性。因此,对显示面板进行亮度补偿,对提高显示面板的显示均一性具有重要的意义。
相关技术中,可以预先在实验过程中,测量显示面板中每个像素在不同使用时长时的亮度,以得到每个像素在对应使用时长时的亮度衰减程度,并根据该每个像素在不同使用时长时的亮度衰减程度,总结出亮度衰减程度与使用时长的对应关系。在对待补偿显示面板进行亮度补偿时,可以先获取每个像素的使用时长,并根据该使用时长查询该对应关系得到对应像素的亮度衰减程度,然后根据该亮度衰减程度对像素进行亮度补偿。其中,像素的亮度衰减程度是在一定显示条件下,在驱动像素按照目标亮度进行显示时,根据该像素所呈现的显示亮度与该目标亮度确定的。
但是,当显示过程中的显示条件发生变化时,像素的亮度衰减程度可能随该显示条件发生变化,导致根据对应关系确定的亮度衰减程度进行亮度补偿的准确性较低。
发明内容
本申请提供了一种显示面板的亮度补偿方法及装置、显示面板、存储介质,可以解决相关技术中亮度补偿的准确性较低的问题,本申请提供的技术方案如下:
第一方面,本申请提供了一种显示面板的亮度补偿方法,包括:获取显示面板中每个显示分区的使用参数,显示面板具有多个显示分区,使用参数用于反映显示分区的历史使用情况,使用参数至少包括:背光参数;基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,显示分区的第一亮度衰减系数用于反映显示分区的亮度衰减程度;基于显示分区的第一亮度衰减系数,对显示分区进行亮度补偿。
通过获取每个显示分区的使用参数,并根据该使用参数基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,然后根据显示分区的第一亮度衰减参数对相应的显示分区进行亮度补偿,相较于相关技术,由于是根据显示分区的使用参数对每个显示分区进行亮度补偿,无需根据每个像素的相关参数对每个像素进行亮度补偿,简化 了获取参数的难度和补偿的复杂度。并且,由于使用参数包括背光参数,使得在获取显示分区的亮度衰减程度时,能够考虑该背光值对亮度衰减程度的影响,提高了获取亮度衰减程度的准确性,进而提高了亮度补偿的准确性。
可选地,使用参数包括:使用总时长、显示分区中的背光源的背光值和显示分区中像素的像素值。
作为一种可实现方式,映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,时间衰减参数用于反映亮度衰减系数随使用时长发生变化的程度,显示衰减参数用于反映亮度衰减系数随背光值和像素值发生变化的程度,衰减常数的取值等于在未受到使用时长、背光值和像素值影响时的亮度衰减系数的取值。
可选地,使用参数包括:使用总时长t,使用总时长t内显示分区中的背光源的背光均值D,以及,使用总时长t内显示分区中像素的像素均值L,亮度衰减系数S、时间衰减参数β、显示衰减参数k和衰减常数τ0满足:
Figure PCTCN2020082166-appb-000001
其中,Dmax为使用总时长t内显示分区中的背光源的最大背光值,Lmax为使用总时长t内显示分区中像素的最大像素值,γ为显示分区的伽马值,exp()为以自然常数e为底的指数函数。
需要说明的是,每个显示分区均包括多种颜色的像素,多种颜色的像素的显示颜色不同,由于不同颜色的像素的衰减快慢程度不同,因此,不同颜色的像素的映射关系可以不同,相应的,在获取不同颜色的像素的第一亮度衰减系数时,可以基于任一显示分区中任一颜色的像素的使用参数与映射关系,分别获取任一显示分区中任一颜色的像素的第一亮度衰减系数,任一颜色的像素为多种颜色的像素中的任一种;
相应的,基于显示分区的第一亮度衰减系数,对显示分区进行亮度补偿,包括:基于显示分区中任一颜色的像素的第一亮度衰减系数,对显示分区中任一颜色的像素进行亮度补偿。通过分别针对不同颜色的像素进行补偿,能够提高补偿的精细程度,进一步提高补偿的准确性。
可选地,在基于显示分区的第一亮度衰减系数,对显示分区进行亮度补偿之前,方法还包括:分别获取控制多个显示分区按照参考亮度进行显示时,每个显示分区的显示亮度;基于每个显示分区的显示亮度和对应的参考亮度,确定每个显示分区的第二亮度衰减系数,第二亮度衰减系数用于反映显示亮度相对于对应的参考亮度的衰减程度;当多个显示分区的亮度衰减差值不在第一参考范围内时,调整映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于第一参考范围内,亮度衰减差值基于多个显示分区中一个或多个显示分区的第二亮度衰减系数和第一亮度衰减系数确定;基于调整后的映射关系,更新第一亮度衰减系数。
通过根据待补偿的显示面板的参考亮度和对应的显示亮度自适应地调整映射关系,能够使调整后的映射关系更符合待补偿的显示面板的实际使用情况,使得根据更新后的映射关系确定的第一亮度衰减系数更能反映显示面板的实际衰减情况,有效地提高了获取的第一亮度衰减系数的准确性。
当映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况时,当多个显示分区的亮度衰减差值不在第一参考范围内时,调整映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于第一参考范围内的实现过程可以包括:当一个或多个显示分区的衰减系数差值之和大于参考差值阈值时,调整时间衰减参数和衰减常数,直至根据调整后的时间衰减参数和衰减常数确定的一个或多个显示分区的衰减系数差值之和,小于或等于参考差值阈值,显示分区的衰减系数差值为显示分区的第二亮度衰减系数与显示分区的第一亮度衰减系数之差;基于多个显示分区中两个显示分区的第二亮度衰减系数,获取两个显示分区的第一亮度衰减比,第一亮度衰减比用于反映根据显示亮度确定的两个显示分区的亮度衰减差异程度;基于调整后的时间衰减参数和衰减常数,获取两个显示分区的第二亮度衰减比,第二亮度衰减比用于反映根据映射关系确定的两个显示分区的亮度衰减差异程度;当两个显示分区的第一亮度衰减比与第二亮度衰减比的第一差值不在第二参考范围内时,调整显示衰减参数,直至根据调整后的显示衰减参数确定的第一差值位于第二参考范围内。
为了进一步提高获取的第一亮度衰减系数的准确性,该调整过程还可以包括:获取多个显示分区中另外两个显示分区的第一亮度衰减比,另外两个显示分区与两个显示分区中存在一个或两个显示分区不同;基于调整后的时间衰减参数、显示衰减参数和衰减常数,获取另外两个显示分区的第二亮度衰减比;当另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值不在第三参考范围内时,将最小差距参数组合中的时间衰减参数、显示衰减参数和衰减常数分别确定为更新后的时间衰减参数、显示衰减参数和衰减常数;
其中,参数调整过程得到的多组参数组合中,最小差距参数组合中的参数使得差值函数取得最小值,差值函数为第三差值的绝对值、第四差值的绝对值和第五差值的绝对值之和,第三差值为衰减系数差值之和与参考差值阈值的差值,第四差值为两个显示分区的第一差值与第二参考范围的边界值的差值,第五差值为另外两个显示分区的第二差值与第三参考范围的边界值的差值。
最小差距参数组合中的参数为使得差值函数取得最优解的参数,也即是,最小差距参数组合中的参数为该多组参数组合中使得映射关系最符合显示面板的实际使用情况,根据其进行亮度补偿,能够最大程度地对显示面板的显示均一性调整。
可选地,显示分区的第二亮度衰减系数等于显示分区的显示亮度与显示分区对应的参考亮度的比值。
并且,第一显示分区和第二显示分区的第一亮度衰减比等于第一显示分区的第二亮度衰减系数与第二显示分区的第二亮度衰减系数的比值;
第一显示分区和第二显示分区的第二亮度衰减比等于第一显示分区的第一亮度衰减系数与第二显示分区的第一亮度衰减系数的比值。
在一种可实现方式中,基于显示分区的第一亮度衰减系数,对显示分区进行亮度补偿的实现过程,包括:基于显示分区的第一亮度衰减系数,确定显示分区的补偿增益,基于显示分区的补偿增益,对显示分区进行亮度补偿。
其中,基于显示分区的第一亮度衰减系数,确定显示分区的补偿增益的实现过程,包括:将多个显示分区中的目标显示分区的补偿增益确定为1,将目标显示分区的第一亮度衰减系数与其他显示分区的第一亮度衰减系数的比值,确定为其他显示分区的补偿增益,其他显示 分区为多个显示分区中除目标显示分区外的任一显示分区。
示例地,显示面板具有主显示分区、辅显示分区,以及,位于主显示分区和辅显示分区之间的弯折显示分区,主显示分区为目标显示分区。
由于主显示分区为显示面板的多个显示分区中使用时长最长的显示分区,该主显示分区的老化程度最大,相较于对其他显示分区进行亮度补偿的补偿难度,对该主显示分区的补偿难度较大,因此,将该主显示分区的补偿增益确定为1,能够有效降低对显示面板进行亮度补偿的补偿难度。
第二方面,本申请提供了一种显示面板的亮度补偿装置,包括:
第一获取模块,用于获取显示面板中每个显示分区的使用参数,显示面板具有多个显示分区,使用参数用于反映显示分区的历史使用情况,使用参数至少包括:背光参数;
第二获取模块,用于基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,显示分区的第一亮度衰减系数用于反映显示分区的亮度衰减程度;
补偿模块,用于基于显示分区的第一亮度衰减系数,对显示分区进行亮度补偿。
可选地,使用参数包括:使用总时长、显示分区中的背光源的背光值和显示分区中像素的像素值。
可选地,映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,时间衰减参数用于反映亮度衰减系数随使用时长发生变化的程度,显示衰减参数用于反映亮度衰减系数随背光值和像素值发生变化的程度,衰减常数的取值等于在未受到使用时长、背光值和像素值影响时的亮度衰减系数的取值。
可选地,使用参数包括:使用总时长t,使用总时长t内显示分区中的背光源的背光均值D,以及,使用总时长t内显示分区中像素的像素均值L,亮度衰减系数S、时间衰减参数β、显示衰减参数k和衰减常数τ0满足:
Figure PCTCN2020082166-appb-000002
其中,Dmax为使用总时长t内显示分区中的背光源的最大背光值,Lmax为使用总时长t内显示分区中像素的最大像素值,γ为显示分区的伽马值,exp()为以自然常数e为底的指数函数。
可选地,每个显示分区均包括多种颜色的像素,多种颜色的像素的显示颜色不同,第二获取模块,用于:
基于任一显示分区中任一颜色的像素的使用参数与映射关系,分别获取任一显示分区中任一颜色的像素的第一亮度衰减系数,任一颜色的像素为多种颜色的像素中的任一种;
相应的,补偿模块用于:基于显示分区中任一颜色的像素的第一亮度衰减系数,对显示分区中任一颜色的像素进行亮度补偿。
可选地,装置还包括:
第三获取模块,用于分别获取控制多个显示分区按照参考亮度进行显示时,每个显示分区的显示亮度;
确定模块,用于基于每个显示分区的显示亮度和对应的参考亮度,确定每个显示分区的第二亮度衰减系数,第二亮度衰减系数用于反映显示亮度相对于对应的参考亮度的衰减程度;
调整模块,用于当多个显示分区的亮度衰减差值不在第一参考范围内时,调整映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于第一参考范围内,亮度衰减差值基于多个显示分区中一个或多个显示分区的第二亮度衰减系数和第一亮度衰减系数确定;
更新模块,用于基于调整后的映射关系,更新第一亮度衰减系数。
可选地,映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,调整模块,用于:
当一个或多个显示分区的衰减系数差值之和大于参考差值阈值时,调整时间衰减参数和衰减常数,直至根据调整后的时间衰减参数和衰减常数确定的一个或多个显示分区的衰减系数差值之和,小于或等于参考差值阈值,显示分区的衰减系数差值为显示分区的第二亮度衰减系数与显示分区的第一亮度衰减系数之差;
基于多个显示分区中两个显示分区的第二亮度衰减系数,获取两个显示分区的第一亮度衰减比,第一亮度衰减比用于反映根据显示亮度确定的两个显示分区的亮度衰减差异程度;
基于调整后的时间衰减参数和衰减常数,获取两个显示分区的第二亮度衰减比,第二亮度衰减比用于反映根据映射关系确定的两个显示分区的亮度衰减差异程度;
当两个显示分区的第一亮度衰减比与第二亮度衰减比的第一差值不在第二参考范围内时,调整显示衰减参数,直至根据调整后的显示衰减参数确定的第一差值位于第二参考范围内。
可选地,调整模块,还用于:
获取多个显示分区中另外两个显示分区的第一亮度衰减比,另外两个显示分区与两个显示分区中存在一个或两个显示分区不同;
基于调整后的时间衰减参数、显示衰减参数和衰减常数,获取另外两个显示分区的第二亮度衰减比;
当另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值不在第三参考范围内时,将最小差距参数组合中的时间衰减参数、显示衰减参数和衰减常数分别确定为更新后的时间衰减参数、显示衰减参数和衰减常数;
其中,参数调整过程得到的多组参数组合中,最小差距参数组合中的参数使得差值函数取得最小值,差值函数为第三差值的绝对值、第四差值的绝对值和第五差值的绝对值之和,第三差值为衰减系数差值之和与参考差值阈值的差值,第四差值为两个显示分区的第一差值与第二参考范围的边界值的差值,第五差值为另外两个显示分区的第二差值与第三参考范围的边界值的差值。
可选地,显示分区的第二亮度衰减系数等于显示分区的显示亮度与显示分区对应的参考亮度的比值。
可选地,第一显示分区和第二显示分区的第一亮度衰减比等于第一显示分区的第二亮度衰减系数与第二显示分区的第二亮度衰减系数的比值;
第一显示分区和第二显示分区的第二亮度衰减比等于第一显示分区的第一亮度衰减系数与第二显示分区的第一亮度衰减系数的比值。
可选地,补偿模块,用于:
基于显示分区的第一亮度衰减系数,确定显示分区的补偿增益;
基于显示分区的补偿增益,对显示分区进行亮度补偿。
可选地,补偿模块,用于:
将多个显示分区中的目标显示分区的补偿增益确定为1;
将目标显示分区的第一亮度衰减系数与其他显示分区的第一亮度衰减系数的比值,确定为其他显示分区的补偿增益,其他显示分区为多个显示分区中除目标显示分区外的任一显示分区。
可选地,显示面板具有主显示分区、辅显示分区,以及,位于主显示分区和辅显示分区之间的弯折显示分区,主显示分区为目标显示分区。
第三方面,本申请提供了一种显示面板的亮度补偿装置,装置包括:处理器和存储器;
存储器,用于存储计算机程序,计算机程序包括程序指令;
处理器,用于调用计算机程序,实现如第一方面任一的显示面板的亮度补偿方法。
第四方面,本申请提供了一种显示面板,显示面板包括:第三方面的显示面板的亮度补偿装置。
第五方面,本申请提供了一种计算机存储介质,计算机存储介质上存储有指令,当指令被处理器执行时,实现如第一方面任一的显示面板的亮度补偿方法。
附图说明
图1是本申请示例性实施例提供的一种显示面板的结构示意图;
图2是本申请示例性实施例提供的一种具有折叠屏的显示面板的示意图;
图3是本申请实施例提供的一种显示面板的亮度补偿方法的流程图;
图4是本申请示例性实施例提供的一种显示器件的衰减规律曲线示意图;
图5是本申请示例性实施例提供的一种当多个显示分区的亮度衰减差值不在第一参考范围内时,调整映射关系的流程图;
图6是本申请示例性实施例提供的一种显示引擎的结构示意图;
图7是本申请示例性实施例提供的一种显示面板的亮度补偿装置的结构示意图;
图8是本申请示例性实施例提供的另一种显示面板的亮度补偿装置的结构示意图;
图9是本申请示例性实施例提供的又一种显示面板的亮度补偿装置的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚,下面将结合附图对本申请实施方式作进一步地详细描述。
目前,自发光显示设备(例如有机发光二极管(organic light emitting diode,OLED)显示面板)都存在亮度衰减的问题。并且,根据像素的显示内容和使用时长的不同,不同像素的亮度衰减程度不同。其一般表现为:处于常亮状态的像素的亮度衰减程度大,此时,该亮度衰减程度大的像素所在显示区域中留下残影,俗称“烧屏”,导致显示面板的显示性能受到 影响。例如,具有折叠屏的移动终端通常具有多个显示分区,在其使用过程中,由于不同显示分区的使用时长和使用内容不同,不同显示分区烧屏的程度不一致,导致使用整个折叠屏时,不同显示分区的亮度差异较大。
相关技术中,通过在OLED大屏电视的控制电路中增加记录器,以记录每个像素的使用时长,并在亮度补偿时,根据每个像素的使用时长查询亮度衰减程度与使用时长的对应关系,以得到每个像素单元的亮度衰减程度,然后根据每个像素的亮度衰减程度对对应像素进行亮度补偿。
但是,在该补偿方法中,由于需要记录每个像素的使用时长,导致该补偿的成本较高,在移动终端中实现该补偿方法的难度较大,且在具有折叠屏的移动终端中,对显示均一性的关注点主要在于不同显示分区的显示相对一致性。并且,由于该OLED大屏电视的背光值(digit backlight value,DBV)调整频率较低,在获取像素的亮度衰减程度时,未考虑该背光值对亮度衰减程度的影响,导致在背光值对亮度衰减程度影响较大时,该获取的亮度衰减程度的准确性较低。且在确定不同OLED大屏电视中像素的亮度衰减程度时,是采用通用的算法确定该亮度衰减程度,因此,按照该方式确定的亮度衰减程度可能与待补偿的OLED大屏电视的实际使用情况存在较大差异,导致确定的亮度衰减程度的准确性较低。
本申请实施例提供了一种显示面板的亮度补偿方法及装置、显示面板、存储介质,用于根据显示面板中不同显示分区的亮度衰减程度进行亮度补偿,尤其用于对折叠屏中不同显示分区的亮度进行补偿。为便于理解,下面先对本申请实施例提供的显示面板的结构进行介绍。
如图1所示,显示面板包括:多条栅线G、多条数据线D、及由多条数据线D和多条栅线G交叉围成的多个像素X。每个像素X包括:像素电路1和发光电路2。该发光电路包括发光器件。当像素电路处于导通状态时,可通过该像素电路向发光电路提供来自数据线D的数据信号。该数据信号用于向发光电路充电,以供发光电路发光。
具有折叠屏的显示面板具有多个显示分区,该多个显示分区包括:一个主显示分区、至少一个辅显示分区,以及,位于主显示分区和每个辅显示分区之间的弯折显示分区。例如,具有折叠屏的显示面板可以具有一个主显示分区、一个辅显示分区和一个弯折显示分区,或者,具有折叠屏的显示面板可以具有一个主显示分区、两个辅显示分区和两个弯折显示分区。该弯折显示分区能够被弯折,在仅使用主显示分区时,可以通过控制该弯折显示分区处于弯折状态,使得辅显示分区位于主显示分区的非显示侧。在需要使用主显示分区和辅显示分区时,可以控制需要使用的辅显示分区和主显示分区之间的弯折显示分区处于非弯折状态,使得该主显示分区和需要使用的辅显示分区处于同一平面内,使得该主显示分区的显示区域、该辅显示分区的显示区域和该弯折显示分区的显示区域共同构成该显示面板的显示区域。
图2为具有折叠屏的显示面板的示意图,如图2所示,该显示面板具有一个主显示分区、一个辅显示分区,以及,位于该主显示分区和该辅显示分区之间的弯折显示分区。该图2为弯折显示分区处于非弯折状态时的示意图,可以看出:该显示面板的显示区域由主显示分区的显示区域、辅显示分区的显示区域和弯折显示分区的显示区域共同构成。
图3为本申请实施例提供的一种显示面板的亮度补偿方法的流程图。如图3所示,该方法可以包括:
步骤301、获取显示面板中每个显示分区的使用参数。
其中,显示面板具有多个显示分区,例如,显示面板可以为具有折叠屏的显示面板,该显示面板包括:主显示分区、辅显示分区,以及,位于该主显示分区和该辅显示分区之间的弯折显示分区。
该使用参数用于反映显示分区的历史使用情况。可选地,该使用参数至少可以包括:背光参数。作为一种可实现方式,该使用参数至少可以包括:使用总时长、显示分区中的背光源的背光值和显示分区中像素的像素值。该使用总时长可以为从第一次使用显示分区的时刻到获取该使用参数的时刻之间,该显示分区处于显示状态的总时长。该显示分区中背光源的背光值为在该使用总时长内,为该显示分区提供背光的背光源的背光值。该显示分区中像素的像素值可以为在该使用总时长内,该显示分区中像素所呈现的像素值。
并且,为了保证亮度补偿的效率,该使用参数还可以包括:显示面板使用过程中所处环境的温度。由于显示面板处于高温环境、低温环境和常温环境中的显示面板中器件的老化程度不同,此时,通过获取显示面板使用过程中所处环境的温度,可以分别针对不同的温度对显示面板进行补偿,以提高对显示面板进行补偿的准确性。
同时,当该显示面板为具有折叠屏的显示面板时,该使用参数还可以包括:折叠次数。由于折叠次数越多,对显示分区中器件的损伤越大,因此,当折叠屏的折叠次数超过参考次数阈值时,对显示分区中器件的损伤已经达到一定程度,此时已无法通过亮度补偿弥补由显示器件损伤引起的亮度衰减。因此,通过获取该折叠次数能够针对性地对显示分区进行补偿,能够减小因无用补偿所耗费的能耗。
步骤302、基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,该显示分区的第一亮度衰减系数用于反映该显示分区的亮度衰减程度。
可选地,该映射关系可以表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,该时间衰减参数用于反映亮度衰减系数随使用时长发生变化的程度,该显示衰减参数用于反映亮度衰减系数随背光值和像素值发生变化的程度,该衰减常数的取值等于在未受到使用时长、背光值和像素值影响时的亮度衰减系数的取值。
并且,当使用参数包括:使用总时长t,使用总时长t内显示分区中的背光源的背光均值D,以及,使用总时长t内显示分区中像素的像素均值L时,亮度衰减系数S、时间衰减参数β、显示衰减参数k和衰减常数τ0可以满足:
Figure PCTCN2020082166-appb-000003
其中,Dmax为使用总时长t内显示分区中的背光源的最大背光值,Lmax为使用总时长t内显示分区中像素的最大像素值,γ为显示分区的伽马值,exp()为以自然常数e为底的指数函数。
可选地,假设使用总时长t内显示分区中的背光源向显示分区提供了N次背光值不同的背光,且n个背光值分别为D1、D2、D3,......,Dn,则该使用总时长t内显示分区中的背光源的背光均值D=(D1+D2+D3+......+Dn)/n。使用总时长t内显示分区共显示了m帧图像,m帧图像的像素均值分别为L1、L2、L3,......,Lm,则该使用总时长t内显示分区中像素的 像素均值L=(L1+L2+L3+......+Lm)/m。且每帧图像的像素均值为该显示分区显示该帧图像时,该显示分区中所有像素的像素值的总和与像素总数的商。
需要说明的是,由于不同颜色的像素的衰减快慢程度不同,因此,不同颜色的像素的映射关系可以不同,相应的,在获取不同颜色的像素的第一亮度衰减系数时,可以根据对应颜色的像素的映射关系驱动该对应颜色的像素的第一亮度衰减系数。
并且,不同颜色的像素的使用情况也不同,因此,当需要分别对不同颜色的像素进行亮度补偿时,可以针对任一显示分区中任一颜色的像素,获取该任一显示分区中任一颜色的像素的使用参数,然后基于任一显示分区中任一颜色的像素的使用参数与映射关系,分别获取任一显示分区中任一颜色的像素的第一亮度衰减系数,相应的,在对该任一显示分区的该任一颜色的像素进行补偿时,可以基于该任一显示分区中该任一颜色的像素的第一亮度衰减系数,对该任一显示分区中该任一颜色的像素进行亮度补偿。其中,任一颜色的像素为多种颜色的像素中的任一种。并且,通过分别针对不同颜色的像素进行补偿,能够提高补偿的精细程度,进一步提高补偿的准确性。
还需要说明的是,亮度衰减系数S、时间衰减参数β、显示衰减参数k和衰减常数τ0可以根据显示器件的衰减规律确定。其中,该衰减规律可以通过根据离线测试得到的多组测量数据(例如大数据)总结得到,每组测量数据可以包括:在显示器件显示的过程中,在不同使用时刻测量得到的衰减系数。该衰减规律可以通过曲线表示,且不同颜色的像素在不同灰阶下的衰减速度不同。示例地,图4为显示器件的衰减规律曲线,如图4所示,横坐标为时间,单位为小时,纵坐标为显示器件的亮度衰减系数,曲线A1为显示面板中红色像素、绿色像素和蓝色像素混光为白光时,在灰阶为255时的衰减规律曲线,曲线A2为显示面板中红色像素、绿色像素和蓝色像素混光为白光时,在灰阶为216时的衰减规律曲线,曲线A3为显示面板中红色像素、绿色像素和蓝色像素混光为白光时,在灰阶为164时的衰减规律曲线,曲线A4为显示面板中红色像素、绿色像素和蓝色像素混光为白光时,在灰阶为126时的衰减规律曲线,从该图4可以看出:灰阶越大时,衰减速度越快。
此时,任一颜色的像素在某一灰阶下的时间衰减参数β可以等于该颜色的像素在某一灰阶下衰减规律曲线的斜率,显示衰减参数k等于该曲线在x轴上的截距随灰阶发生变化的变化率,衰减常数τ0等于截距随灰阶发生变化的变化率在x轴上的截距。
步骤303、分别获取控制多个显示分区按照参考亮度进行显示时,每个显示分区的显示亮度。
显示分区的亮度由显示分区中像素的亮度决定,因此,可以控制显示分区中的所有像素均按照参考亮度进行显示,以得到控制该显示分区按照参考亮度进行显示的效果。并且,像素的亮度由向该像素充电的数据信号的幅值确定,因此,可以通过调整向像素提供的数据信号的幅值,以控制像素按照参考亮度进行显示。
可选地,可以分别采用光学探头或色彩分析仪等仪器在多个显示分区的显示侧进行测量,以获取每个显示分区的显示亮度。
步骤304、基于每个显示分区的显示亮度和对应的参考亮度,确定每个显示分区的第二亮度衰减系数,该第二亮度衰减系数用于反映显示亮度相对于对应的参考亮度的衰减程度。
由于显示器件老化等因素,在控制显示分区按照参考亮度进行显示时,该显示分区的亮度可能不等于该参考亮度,因此,可以根据该显示亮度和对应的参考亮度获取该第二亮度衰 减系数。可选地,显示分区的第二亮度衰减系数可以等于显示分区的显示亮度与显示分区对应的参考亮度的比值。
步骤305、当多个显示分区的亮度衰减差值不在第一参考范围内时,调整映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于第一参考范围内,该亮度衰减差值基于多个显示分区中一个或多个显示分区的第二亮度衰减系数和第一亮度衰减系数确定。
可选地,当映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况时,如图5所示,该步骤305的实现过程可以包括:
步骤3051、当一个或多个显示分区的衰减系数差值之和大于参考差值阈值时,调整时间衰减参数和衰减常数,直至根据调整后的时间衰减参数和衰减常数确定的一个或多个显示分区的衰减系数差值之和小于或等于参考差值阈值。
其中,显示分区的衰减系数差值为显示分区的第二亮度衰减系数与显示分区的第一亮度衰减系数之差。示例地,当显示面板包括显示分区A、显示分区B和显示分区C时,显示分区A的第一亮度衰减系数为A’%,显示分区A的第二亮度衰减系数为A%,显示分区B的第一亮度衰减系数为B’%,显示分区B的第二亮度衰减系数为B%,显示分区C的第一亮度衰减系数为C’%,显示分区C的第二亮度衰减系数为C%,则该显示分区A的衰减系数差值等于A%-A’%,显示分区B的衰减系数差值等于B%-B’%,显示分区C的衰减系数差值等于C%-C’%,三个显示分区的衰减系数差值之和等于(A%-A’%)+(B%-B’%)+(C%-C’%)。
并且,由于显示亮度相对于参考亮度的偏差可能为正偏也可能为反偏,因此,显示分区的衰减系数差值还可以为显示分区的第二亮度衰减系数与显示分区的第一亮度衰减系数之差的绝对值。此时,该三个显示分区的衰减系数差值之和=SUM(abs(A%-A’%),abs(B%-B’%),abs(C%-C’%)),其中,SUM为求和函数,abs为取绝对值函数。
该参考差值阈值可以根据实际需要确定,例如,该参考差值阈值可以为0.002。当一个或多个显示分区的衰减系数差值之和大于参考差值阈值时,说明显示分区由第一亮度衰减系数反映的衰减程度与由第二亮度衰减系数反映的衰减程度的差距较大,此时,若根据第一亮度衰减系数对显示分区进行亮度补偿,可能仍无法解决因亮度衰减导致的显示均一性问题,此时,需要更新映射关系,并根据更新后的映射关系确定显示分区的亮度衰减系数,以提高对显示分区进行亮度补偿时的准确性。
并且,在该映射关系的调整过程中,可以先保持显示衰减参数不变,并调整时间衰减参数和衰减常数。可选地,在调节时间衰减参数和衰减常数时,可以分别按照固定步长对该时间衰减参数和衰减常数进行调整。其中,对该时间衰减参数和衰减常数进行调整时的步长可以根据两者的取值范围确定。例如,时间衰减参数的取值范围可以为[0,1],其步长可以等于0.001,衰减常数的取值范围可以为[1000,10万],其步长可以等于20。
步骤3052、基于多个显示分区中两个显示分区的第二亮度衰减系数,获取两个显示分区的第一亮度衰减比,该第一亮度衰减比用于反映根据显示亮度确定的两个显示分区的亮度衰减差异程度。
在调整时间衰减参数和衰减常数后,可以再确定显示分区由第一亮度衰减系数反映的衰减程度与由第二亮度衰减系数反映的衰减程度的差距,并在该差距较大时,调整显示衰减参数。可选地,在调整时间衰减参数和衰减常数后,该差距可以根据多个显示分区中两个显示分区的亮度衰减差异程度确定,此时可以获取第一亮度衰减比和第二亮度衰减比,并根据该 第一亮度衰减比和第二亮度衰减比确定差距,以决定是否需要调整显示衰减参数。
由于第二亮度衰减系数为根据显示亮度和对应的参考亮度确定的反映显示分区的亮度衰减程度的参数,因此,第一显示分区和第二显示分区的第一亮度衰减比可以等于第一显示分区的第二亮度衰减系数与第二显示分区的第二亮度衰减系数的比值。
该两个显示分区可以为显示面板中多个显示分区中的任意两个显示分区。例如,当显示面板为具有折叠屏的显示面板时,该两个显示分区中的一个可以为该折叠屏中的主显示分区。并且,由于该主显示分区为该显示面板中使用时长最长的显示分区,其亮度衰减程度最大,当该两个显示分区中一个显示分区为主显示分区,并根据该两个显示分区的第一亮度衰减比调整映射关系时,能够使调整后的映射关系更符合该显示面板中显示分区的使用情况,根据该调整后的映射关系获取的第一亮度衰减系数能够更准确地反映显示分区的亮度衰减程度。
步骤3053、基于调整后的时间衰减参数和衰减常数,获取两个显示分区的第二亮度衰减比,第二亮度衰减比用于反映根据映射关系确定的两个显示分区的亮度衰减差异程度。
由于第一亮度衰减系数为根据映射关系确定的反映显示分区的亮度衰减程度的参数,因此,第一显示分区和第二显示分区的第二亮度衰减比等于第一显示分区的第一亮度衰减系数与第二显示分区的第一亮度衰减系数的比值。
步骤3054、当两个显示分区的第一亮度衰减比与第二亮度衰减比的第一差值不在第二参考范围内时,调整显示衰减参数,直至根据调整后的显示衰减参数确定的第一差值位于第二参考范围内。
当两个显示分区对应的第一差值不在第二参考范围内时,说明该两个显示分区由第一亮度衰减系数反映的衰减程度与由第二亮度衰减系数反映的衰减程度的差异较大,此时,若直接根据调整后的时间衰减参数和衰减常数所确定的第一亮度衰减系数,对显示分区进行亮度补偿,可能仍无法解决因亮度衰减导致的显示均一性问题,此时,需要继续更新映射关系,即调整显示衰减参数。
可选地,在调节显示衰减参数时,也可以按照固定步长对该显示衰减参数进行调整。其中,对该显示衰减参数进行调整时的步长,可以根据该显示衰减参数的取值范围确定。例如,显示衰减参数的取值范围可以为[0,10],其步长可以等于0.005。
其中,该第二参考范围可以根据实际需要确定,例如,该第二参考范围可以为[-T,T],该T的取值可以为0.003。
步骤3055、获取多个显示分区中另外两个显示分区的第一亮度衰减比,另外两个显示分区与两个显示分区中存在一个或两个显示分区不同。
为了保证根据调整的后的映射关系对显示分区进行补偿的准确性,在完成时间衰减参数、显示衰减参数和衰减常数的调整后,还可以对调整后的映射关系进行验证。此时,可以根据该多个显示分区中另外两个显示分区的显示亮度,确定该另外两个显示分区由显示亮度反映的亮度衰减差异程度,并根据调整后的映射关系,确定该另外两个显示分区由映射关系反映的亮度衰减差异程度,然后根据该另外两个显示分区根据显示亮度确定的亮度衰减差异程度与根据映射关系确定的亮度衰减差异程度,确定调整后的映射关系是否符合显示面板的实际使用情况,进而确定调整后的各个参数是否合适。
该另外两个显示分区由映射关系反映的亮度衰减差异程度可以使用该另外两个显示分区的第一亮度衰减比量化。且该第一亮度衰减比的计算方式可以相应参考步骤3052中的实现方 式。
该另外两个显示分区与两个显示分区中存在一个或两个显示分区不同。也即是,该另外两个显示分区可以与步骤3052至步骤3054中的两个显示分区均不同,或者,该另外两个显示分区可以与步骤3052至步骤3054中的两个显示分区中的一个不同。例如,当显示面板为具有折叠屏的显示面板时,且折叠屏包括一个主显示分区、一个辅显示分区,以及,位于该主显示分区和该辅显示分区中的弯折显示分区时,步骤3052至步骤3054中的两个显示分区可以为该主显示分区和弯折显示分区,该另外两个显示分区可以为弯折显示分区和辅显示分区。
步骤3056、基于调整后的时间衰减参数、显示衰减参数和衰减常数,获取另外两个显示分区的第二亮度衰减比。
该另外两个显示分区由映射关系反映的亮度衰减差异程度可以使用该另外两个显示分区的第二亮度衰减比量化。且该第二亮度衰减比的计算方式可以相应参考步骤3053中的实现方式。
步骤3057、当另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值不在第三参考范围内时,将最小差距参数组合中的时间衰减参数、显示衰减参数和衰减常数分别确定为更新后的时间衰减参数、显示衰减参数和衰减常数。
当另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值在第三参考范围内时,说明调整后的映射关系符合显示面板的实际使用情况,此时,可以将在上述步骤3051至步骤3054调整后的时间衰减参数、显示衰减参数和衰减常数分别确定为更新后的时间衰减参数、显示衰减参数和衰减常数。
当另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值不在第三参考范围内时,说明调整后的映射关系不太符合显示面板的实际使用情况,此时,可以将最小差距参数组合中的时间衰减参数、显示衰减参数和衰减常数分别确定为更新后的时间衰减参数、显示衰减参数和衰减常数。其中,参数调整过程得到的多组参数组合中,最小差距参数组合中的参数为使得差值函数取得最小值的参数,即最小差距参数组合中的参数为使得差值函数取得最优解的参数,也即是,最小差距参数组合中的参数为该多组参数组合中使得映射关系最符合显示面板的实际使用情况,根据其进行亮度补偿,能够最大程度地对显示面板的显示均一性调整。
在一种可实现方式中,该差值函数为第三差值的绝对值、第四差值的绝对值和第五差值的绝对值之和,该第三差值为衰减系数差值之和与参考差值阈值的差值,该第四差值为两个显示分区的第一差值与第二参考范围的边界值的差值,该第五差值为另外两个显示分区的第二差值与第三参考范围的边界值的差值。
可选地,该第三参考范围可以根据实际需要确定,例如,该第三参考范围可以为[-Z,Z],该Z的取值可以为0.004。
步骤306、基于调整后的映射关系,更新第一亮度衰减系数。
由于映射关系由时间衰减参数、显示衰减参数和衰减常数表征,完成时间衰减参数、显示衰减参数和衰减常数的调整,即完成了映射关系的调整。此时,可以将显示分区的使用参数带入调整参数后的映射关系,以获取更新后的第一亮度衰减参数。
通过根据待补偿的显示面板的参考亮度和对应的显示亮度自适应地调整映射关系,能够 使调整后的映射关系更符合待补偿的显示面板的实际使用情况,使得根据更新后的映射关系确定的第一亮度衰减系数更能反映显示面板的实际衰减情况,有效地提高了获取的第一亮度衰减系数的准确性。
步骤307、基于显示分区的第一亮度衰减系数,确定显示分区的补偿增益。
可选地,为便于简化对显示区域进行亮度补偿的复杂度,可以将多个显示分区中的目标显示分区的补偿增益确定为1,并将目标显示分区的第一亮度衰减系数与其他显示分区的第一亮度衰减系数的比值,确定为其他显示分区的补偿增益,其他显示分区为多个显示分区中除目标显示分区外的任一显示分区。
其中,显示面板为具有折叠屏的显示面板时,该显示面板可以具有主显示分区、辅显示分区,以及,位于主显示分区和辅显示分区之间的弯折显示分区,主显示分区为目标显示分区。由于主显示分区为显示面板的多个显示分区中使用时长最长的显示分区,该主显示分区的老化程度最大,相较于对其他显示分区进行亮度补偿的补偿难度,对该主显示分区的补偿难度较大,因此,将该主显示分区的补偿增益确定为1,能够有效降低对显示面板进行亮度补偿的补偿难度。
步骤308、基于显示分区的补偿增益,对显示分区进行亮度补偿。
在确定每个显示分区的补偿增益后,可以根据各个显示分区的补偿增益对各个显示分区进行亮度补偿。可选地,显示面板的亮度补偿可以分为外部补偿(如伽马补偿)和内部补偿(如Demura补偿),在获取每个显示分区的补偿增益后,可以将补偿增益发送至伽马补偿模块和Demura补偿模块,根据每个显示分区的补偿增益对对应的显示分区进行伽马补偿和Demura补偿。
当本申请实施例提供的显示面板的补偿方法应用于移动终端时,上述步骤301至步骤308可以通过移动终端中的显示引擎实现。图6是本申请实施例提供的一种显示引擎模块的结构示意图。如图6所示,该显示引擎可以包括:使用参数获取模块、亮度衰减系数获取模块、内部补偿模块,且该显示引擎还通过驱动接口模块与外部补偿模块连接。该使用参数获取模块包括:读参数子模块、使用参数获取子模块和写参数子模块,该读参数子模块可以与移动终端中的信息获取模块连接。该亮度衰减系数获取模块包括:参数统计子模块、亮度衰减系数获取子模块和映射关系存储子模块。参数统计子模块可以与写参数子模块通信,以获取该写参数子模块存储的参数,且该参数统计子模块可以在指定时间获取参数。例如,参数统计子模块可以每100秒从写参数子模块获取一次参数。且亮度衰减系数获取子模块也可以根据参数统计子模块获取的参数和映射关系存储子模块中存储的映射关系,在指定时间计算亮度衰减系数。例如,亮度衰减系数获取子模块可以根据参数统计子模块获取的参数和映射关系存储子模块中存储的映射关系,周期性地计算亮度衰减系数。内部补偿模块可以为Demura补偿模块,该Demura补偿模块可以通过查表的方式对显示分区进行亮度补偿,外部补偿模块可以为伽马补偿模块。
显示面板中可以设置有用于进行外部补偿的外部补偿模块(如Demura模块)和用于进行内部补偿的内部补偿模块,因此,在获取每个显示分区的补偿增益后,可以将每个显示分区的补偿增益分别输入至该外部补偿模块和内部补偿模块,以供该外部补偿模块和内部补偿模块根据每个显示分区的补偿增益对对应的显示分区进行亮度补偿。
需要说明的是,上述步骤303至步骤305为可选步骤,可以根据实际情况选择是否执行 该步骤303至步骤305,且当未执行步骤303至步骤305时,可以在步骤306中直接根据每个显示分区的使用参数与亮度衰减系数的映射关系,获取对应显示分区的第一亮度衰减系数。
综上所述,本申请实施例提供的显示面板的亮度补偿方法,通过获取每个显示分区的使用参数,并根据该使用参数基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,然后根据显示分区的第一亮度衰减参数对相应的显示分区进行亮度补偿,相较于相关技术,由于是根据显示分区的使用参数对每个显示分区进行亮度补偿,无需根据每个像素的相关参数对每个像素进行亮度补偿,简化了获取参数的难度和补偿的复杂度。
并且,由于使用参数包括背光参数,使得在获取显示分区的亮度衰减程度时,能够考虑该背光值对亮度衰减程度的影响,提高了获取亮度衰减程度的准确性,进而提高了亮度补偿的准确性。
进一步地,在本申请实施例中,由于可以根据显示分区的显示亮度对映射关系进行调整,使得调整后的映射关系更符合显示分区的实际使用情况,因此,根据该调整后的映射关系获取的亮度衰减程度的准确性,进一步地提高了亮度补偿的准确性。
需要说明的是,本申请实施例提供的显示面板的亮度补偿方法步骤的先后顺序可以进行适当调整,步骤也可以根据情况进行相应增减,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化的方法,都应涵盖在本申请的保护范围之内,因此不再赘述。
下述为本申请的装置实施例,可以用于执行本申请的方法实施例。对于本申请装置实施例中未披露的细节,请参照本申请方法实施例。
本申请实施例提供了一种显示面板的亮度补偿装置,如图7所示,该显示面板的亮度补偿装置700可以包括:
第一获取模块701,用于获取显示面板中每个显示分区的使用参数,显示面板具有多个显示分区,使用参数用于反映显示分区的历史使用情况,使用参数至少可以包括:背光参数。
第二获取模块702,用于基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,显示分区的第一亮度衰减系数用于反映显示分区的亮度衰减程度。
补偿模块703,用于基于显示分区的第一亮度衰减系数,对显示分区进行亮度补偿。
综上所述,本申请实施例提供的显示面板的亮度补偿装置,通过第一获取模块获取每个显示分区的使用参数,第二获取模块根据该使用参数基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,补偿模块根据显示分区的第一亮度衰减参数对相应的显示分区进行亮度补偿,相较于相关技术,由于是根据显示分区的使用参数对每个显示分区进行亮度补偿,无需根据每个像素的相关参数对每个像素进行亮度补偿,简化了获取参数的难度和补偿的复杂度。
并且,由于使用参数包括背光参数,使得在获取显示分区的亮度衰减程度时,能够考虑该背光值对亮度衰减程度的影响,提高了获取亮度衰减程度的准确性,进而提高了亮度补偿的准确性。
可选地,使用参数可以包括:使用总时长、显示分区中的背光源的背光值和显示分区中像素的像素值。
可选地,映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,时间衰减参数用于反映亮度衰减系数随使用时长发生变化的程度,显示衰减参数用于反映亮度衰减系数随背光值和像素值发生变化的程度,衰减常数的取值等于在未受到使用时长、背光值和像素值影响时的亮度衰减系数的取值。
可选地,使用参数可以包括:使用总时长t,使用总时长t内显示分区中的背光源的背光均值D,以及,使用总时长t内显示分区中像素的像素均值L,亮度衰减系数S、时间衰减参数β、显示衰减参数k和衰减常数τ0满足:
Figure PCTCN2020082166-appb-000004
其中,Dmax为使用总时长t内显示分区中的背光源的最大背光值,Lmax为使用总时长t内显示分区中像素的最大像素值,γ为显示分区的伽马值,exp()为以自然常数e为底的指数函数。
可选地,每个显示分区均可以包括多种颜色的像素,多种颜色的像素的显示颜色不同,第二获取模块702,用于:
基于任一显示分区中任一颜色的像素的使用参数与映射关系,分别获取任一显示分区中任一颜色的像素的第一亮度衰减系数,任一颜色的像素为多种颜色的像素中的任一种。
相应的,补偿模块703,用于:基于显示分区中任一颜色的像素的第一亮度衰减系数,对显示分区中任一颜色的像素进行亮度补偿。
可选地,如图8所示,装置700还可以包括:
第三获取模块704,用于分别获取控制多个显示分区按照参考亮度进行显示时,每个显示分区的显示亮度。
确定模块705,用于基于每个显示分区的显示亮度和对应的参考亮度,确定每个显示分区的第二亮度衰减系数,第二亮度衰减系数用于反映显示亮度相对于对应的参考亮度的衰减程度。
调整模块706,用于当多个显示分区的亮度衰减差值不在第一参考范围内时,调整映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于第一参考范围内,亮度衰减差值基于多个显示分区中一个或多个显示分区的第二亮度衰减系数和第一亮度衰减系数确定。
更新模块707,用于基于调整后的映射关系,更新第一亮度衰减系数。
当映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况时,调整模块706,用于:
当一个或多个显示分区的衰减系数差值之和大于参考差值阈值时,调整时间衰减参数和衰减常数,直至根据调整后的时间衰减参数和衰减常数确定的一个或多个显示分区的衰减系数差值之和,小于或等于参考差值阈值,显示分区的衰减系数差值为显示分区的第二亮度衰减系数与显示分区的第一亮度衰减系数之差。
基于多个显示分区中两个显示分区的第二亮度衰减系数,获取两个显示分区的第一亮度衰减比,第一亮度衰减比用于反映根据显示亮度确定的两个显示分区的亮度衰减差异程度。
基于调整后的时间衰减参数和衰减常数,获取两个显示分区的第二亮度衰减比,第二亮 度衰减比用于反映根据映射关系确定的两个显示分区的亮度衰减差异程度。
当两个显示分区的第一亮度衰减比与第二亮度衰减比的第一差值不在第二参考范围内时,调整显示衰减参数,直至根据调整后的显示衰减参数确定的第一差值位于第二参考范围内。
可选地,调整模块706,还用于:
获取多个显示分区中另外两个显示分区的第一亮度衰减比,另外两个显示分区与两个显示分区中存在一个或两个显示分区不同。
基于调整后的时间衰减参数、显示衰减参数和衰减常数,获取另外两个显示分区的第二亮度衰减比。
当另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值不在第三参考范围内时,将最小差距参数组合中的时间衰减参数、显示衰减参数和衰减常数分别确定为更新后的时间衰减参数、显示衰减参数和衰减常数。
其中,参数调整过程得到的多组参数组合中,最小差距参数组合中的参数使得差值函数取得最小值,差值函数为第三差值的绝对值、第四差值的绝对值和第五差值的绝对值之和,第三差值为衰减系数差值之和与参考差值阈值的差值,第四差值为两个显示分区的第一差值与第二参考范围的边界值的差值,第五差值为另外两个显示分区的第二差值与第三参考范围的边界值的差值。
可选地,显示分区的第二亮度衰减系数等于显示分区的显示亮度与显示分区对应的参考亮度的比值。
可选地,第一显示分区和第二显示分区的第一亮度衰减比等于第一显示分区的第二亮度衰减系数与第二显示分区的第二亮度衰减系数的比值。
第一显示分区和第二显示分区的第二亮度衰减比等于第一显示分区的第一亮度衰减系数与第二显示分区的第一亮度衰减系数的比值。
可选地,补偿模块703,用于:
基于显示分区的第一亮度衰减系数,确定显示分区的补偿增益。
基于显示分区的补偿增益,对显示分区进行亮度补偿。
可选地,补偿模块703基于显示分区的第一亮度衰减系数,确定显示分区的补偿增益的过程,包括:
将多个显示分区中的目标显示分区的补偿增益确定为1。
将目标显示分区的第一亮度衰减系数与其他显示分区的第一亮度衰减系数的比值,确定为其他显示分区的补偿增益,其他显示分区为多个显示分区中除目标显示分区外的任一显示分区。
可选地,显示面板具有主显示分区、辅显示分区,以及,位于主显示分区和辅显示分区之间的弯折显示分区,主显示分区为目标显示分区。
综上所述,本申请实施例提供的显示面板的亮度补偿装置,通过第一获取模块获取每个显示分区的使用参数,第二获取模块根据该使用参数基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,补偿模块根据显示分区的第一亮度衰减参数对相应的显示分区进行亮度补偿,相较于相关技术,由于是根据显示分区的使用参数对每个显示分区进行亮度补偿,无需根据每个像素的相关参数对每个像素进行亮度补偿,简化了 获取参数的难度和补偿的复杂度。
并且,由于使用参数包括背光参数,使得在获取显示分区的亮度衰减程度时,能够考虑该背光值对亮度衰减程度的影响,提高了获取亮度衰减程度的准确性,进而提高了亮度补偿的准确性。
进一步地,在本申请实施例中,由于可以根据显示分区的显示亮度对映射关系进行调整,使得调整后的映射关系更符合显示分区的实际使用情况,因此,根据该调整后的映射关系获取的亮度衰减程度的准确性,进一步地提高了亮度补偿的准确性。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的装置和模块的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
本申请实施例还提供了一种显示面板的亮度补偿装置900,如图9所示,该显示面板的亮度补偿装置900包括处理器910,通信接口920、存储器930和驱动集成电路(图9中未示出)。处理器910、通信接口920和存储器930之间通过总线940相互连接。
该总线940可以分为地址总线、数据总线、控制总线等。为便于表示,图9中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
存储器930可以包括易失性存储器(volatile memory),例如随机存取存储器(random-access memory,RAM);存储器930也可以包括非易失性存储器(non-volatile memory),例如快闪存储器(flash memory),硬盘(hard disk drive,HDD)或固态硬盘(solid-state drive,SSD);存储器930还可以包括上述种类的存储器的组合。
存储器930用于存储映射关系,或者,灰阶与驱动信号的对应关系等。
处理器910可以是硬件芯片,完成本申请实施例提供的显示面板的亮度补偿方法中显示面板的亮度补偿装置的功能。上述硬件芯片可以是专用集成电路(application-specific integrated circuit,ASIC),可编程逻辑器件(programmable logic device,PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device,CPLD),现场可编程逻辑门阵列(field-programmable gate array,FPGA),通用阵列逻辑(generic array logic,GAL)或其任意组合。
处理器910也可以是通用处理器,例如,中央处理器(central processing unit,CPU),网络处理器(network processor,NP)或者CPU和NP的组合。相应地,存储器930还用于存储程序指令,处理器910调用该存储器930中存储的程序指令,可以执行本申请实施例提供的显示面板的亮度补偿方法中的一个或多个步骤,或其中可选的实施方式,使得所述显示面板的亮度补偿装置900实现上述显示面板的亮度补偿方法。
本申请实施例还提供了一种显示面板,该显示面板可以包括上述实施例提供的显示面板的亮度补偿装置。显示面板可以为:手表、液晶面板、电子纸、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。示例地,该显示面板可以为OLED显示面板。
本申请实施例还提供了一种存储介质,该存储介质可以为非易失性计算机可读存储介质,当存储介质中的指令由电子设备的处理组件执行时,使得电子设备能够执行本申请实施例提 供的显示面板的亮度补偿方法。
本申请实施例还提供了一种包含指令的计算机程序产品,当计算机程序产品在计算机上运行时,使得计算机执行本申请实施例提供的显示面板的亮度补偿方法。
本申请实施例还提供了一种芯片,该芯片包括可编程逻辑电路和/或程序指令,当所述芯片运行时用于实现本申请实施例提供的显示面板的亮度补偿方法。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成,也可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存储介质中,上述提到的存储介质可以是只读存储器,磁盘或光盘等。
以上所述仅为本申请的可选实施例,并不用以限制本申请,凡在本申请的原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (29)

  1. 一种显示面板的亮度补偿方法,其特征在于,包括:
    获取所述显示面板中每个显示分区的使用参数,所述显示面板具有多个显示分区,所述使用参数用于反映显示分区的历史使用情况,所述使用参数至少包括:背光参数;
    基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,所述显示分区的第一亮度衰减系数用于反映所述显示分区的亮度衰减程度;
    基于所述显示分区的第一亮度衰减系数,对所述显示分区进行亮度补偿。
  2. 根据权利要求1所述的方法,其特征在于,所述使用参数包括:使用总时长、所述显示分区中的背光源的背光值和所述显示分区中像素的像素值。
  3. 根据权利要求1或2所述的方法,其特征在于,所述映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,所述时间衰减参数用于反映亮度衰减系数随使用时长发生变化的程度,所述显示衰减参数用于反映亮度衰减系数随背光值和像素值发生变化的程度,所述衰减常数的取值等于在未受到使用时长、背光值和像素值影响时的亮度衰减系数的取值。
  4. 根据权利要求3所述的方法,其特征在于,所述使用参数包括:使用总时长t,所述使用总时长t内所述显示分区中的背光源的背光均值D,以及,所述使用总时长t内所述显示分区中像素的像素均值L,所述亮度衰减系数S、所述时间衰减参数β、所述显示衰减参数k和所述衰减常数τ0满足:
    Figure PCTCN2020082166-appb-100001
    其中,所述Dmax为所述使用总时长t内所述显示分区中的背光源的最大背光值,所述Lmax为所述使用总时长t内所述显示分区中像素的最大像素值,所述γ为所述显示分区的伽马值,所述exp()为以自然常数e为底的指数函数。
  5. 根据权利要求1至4任一所述的方法,其特征在于,每个显示分区均包括多种颜色的像素,所述多种颜色的像素的显示颜色不同,所述基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,包括:
    基于任一显示分区中任一颜色的像素的使用参数与所述映射关系,分别获取所述任一显示分区中所述任一颜色的像素的第一亮度衰减系数,所述任一颜色的像素为所述多种颜色的像素中的任一种;
    所述基于所述显示分区的第一亮度衰减系数,对所述显示分区进行亮度补偿,包括:
    基于所述显示分区中所述任一颜色的像素的第一亮度衰减系数,对所述显示分区中所述 任一颜色的像素进行亮度补偿。
  6. 根据权利要求1至5任一所述的方法,其特征在于,在所述基于所述显示分区的第一亮度衰减系数,对所述显示分区进行亮度补偿之前,所述方法还包括:
    分别获取控制所述多个显示分区按照参考亮度进行显示时,每个显示分区的显示亮度;
    基于每个显示分区的显示亮度和对应的参考亮度,确定每个显示分区的第二亮度衰减系数,所述第二亮度衰减系数用于反映所述显示亮度相对于对应的参考亮度的衰减程度;
    当所述多个显示分区的亮度衰减差值不在第一参考范围内时,调整所述映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于所述第一参考范围内,所述亮度衰减差值基于所述多个显示分区中一个或多个显示分区的第二亮度衰减系数和第一亮度衰减系数确定;
    基于调整后的映射关系,更新所述第一亮度衰减系数。
  7. 根据权利要求6所述的方法,其特征在于,所述映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,所述当所述多个显示分区的亮度衰减差值不在第一参考范围内时,调整所述映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于所述第一参考范围内,包括:
    当所述一个或多个显示分区的衰减系数差值之和大于参考差值阈值时,调整所述时间衰减参数和所述衰减常数,直至根据调整后的时间衰减参数和衰减常数确定的所述一个或多个显示分区的衰减系数差值之和,小于或等于所述参考差值阈值,所述显示分区的衰减系数差值为所述显示分区的第二亮度衰减系数与所述显示分区的第一亮度衰减系数之差;
    基于所述多个显示分区中两个显示分区的第二亮度衰减系数,获取所述两个显示分区的第一亮度衰减比,所述第一亮度衰减比用于反映根据显示亮度确定的所述两个显示分区的亮度衰减差异程度;
    基于调整后的时间衰减参数和衰减常数,获取所述两个显示分区的第二亮度衰减比,所述第二亮度衰减比用于反映根据所述映射关系确定的所述两个显示分区的亮度衰减差异程度;
    当所述两个显示分区的第一亮度衰减比与第二亮度衰减比的第一差值不在第二参考范围内时,调整所述显示衰减参数,直至根据调整后的显示衰减参数确定的第一差值位于所述第二参考范围内。
  8. 根据权利要求7所述的方法,其特征在于,在所述当所述两个显示分区的第一亮度衰减比与第二亮度衰减比的第一差值不在第二参考范围内时,调整所述显示衰减参数,直至根据调整后的显示衰减参数确定的第一差值位于所述第二参考范围内之后,所述方法还包括:
    获取所述多个显示分区中另外两个显示分区的第一亮度衰减比,所述另外两个显示分区与所述两个显示分区中存在一个或两个显示分区不同;
    基于调整后的时间衰减参数、显示衰减参数和衰减常数,获取所述另外两个显示分区的第二亮度衰减比;
    当所述另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值不在第三参考范围内时,将最小差距参数组合中的时间衰减参数、显示衰减参数和衰减常数分别确定为更 新后的时间衰减参数、显示衰减参数和衰减常数;
    其中,参数调整过程得到的多组参数组合中,所述最小差距参数组合中的参数使得差值函数取得最小值,所述差值函数为第三差值的绝对值、第四差值的绝对值和第五差值的绝对值之和,所述第三差值为所述衰减系数差值之和与所述参考差值阈值的差值,所述第四差值为所述两个显示分区的第一差值与所述第二参考范围的边界值的差值,所述第五差值为所述另外两个显示分区的第二差值与所述第三参考范围的边界值的差值。
  9. 根据权利要求6至8任一所述的方法,其特征在于,所述显示分区的第二亮度衰减系数等于所述显示分区的显示亮度与所述显示分区对应的参考亮度的比值。
  10. 根据权利要求7至9任一所述的方法,其特征在于,第一显示分区和第二显示分区的第一亮度衰减比等于所述第一显示分区的第二亮度衰减系数与所述第二显示分区的第二亮度衰减系数的比值;
    所述第一显示分区和所述第二显示分区的第二亮度衰减比等于所述第一显示分区的第一亮度衰减系数与所述第二显示分区的第一亮度衰减系数的比值。
  11. 根据权利要求1至10任一所述的方法,其特征在于,所述基于所述显示分区的第一亮度衰减系数,对所述显示分区进行亮度补偿,包括:
    基于所述显示分区的第一亮度衰减系数,确定所述显示分区的补偿增益;
    基于所述显示分区的补偿增益,对所述显示分区进行亮度补偿。
  12. 根据权利要求11所述的方法,其特征在于,所述基于所述显示分区的第一亮度衰减系数,确定所述显示分区的补偿增益,包括:
    将所述多个显示分区中的目标显示分区的补偿增益确定为1;
    将所述目标显示分区的第一亮度衰减系数与其他显示分区的第一亮度衰减系数的比值,确定为所述其他显示分区的补偿增益,所述其他显示分区为所述多个显示分区中除所述目标显示分区外的任一显示分区。
  13. 根据权利要求12所述的方法,其特征在于,所述显示面板具有主显示分区、辅显示分区,以及,位于所述主显示分区和辅显示分区之间的弯折显示分区,所述主显示分区为所述目标显示分区。
  14. 一种显示面板的亮度补偿装置,其特征在于,包括:
    第一获取模块,用于获取所述显示面板中每个显示分区的使用参数,所述显示面板具有多个显示分区,所述使用参数用于反映显示分区的历史使用情况,所述使用参数至少包括:背光参数;
    第二获取模块,用于基于使用参数与亮度衰减系数的映射关系,分别获取每个显示分区的第一亮度衰减系数,所述显示分区的第一亮度衰减系数用于反映所述显示分区的亮度衰减程度;
    补偿模块,用于基于所述显示分区的第一亮度衰减系数,对所述显示分区进行亮度补偿。
  15. 根据权利要求14所述的装置,其特征在于,所述使用参数包括:使用总时长、所述显示分区中的背光源的背光值和所述显示分区中像素的像素值。
  16. 根据权利要求14或15所述的装置,其特征在于,所述映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,所述时间衰减参数用于反映亮度衰减系数随使用时长发生变化的程度,所述显示衰减参数用于反映亮度衰减系数随背光值和像素值发生变化的程度,所述衰减常数的取值等于在未受到使用时长、背光值和像素值影响时的亮度衰减系数的取值。
  17. 根据权利要求16所述的装置,其特征在于,所述使用参数包括:使用总时长t,所述使用总时长t内所述显示分区中的背光源的背光均值D,以及,所述使用总时长t内所述显示分区中像素的像素均值L,所述亮度衰减系数S、所述时间衰减参数β、所述显示衰减参数k和所述衰减常数τ0满足:
    Figure PCTCN2020082166-appb-100002
    其中,所述Dmax为所述使用总时长t内所述显示分区中的背光源的最大背光值,所述Lmax为所述使用总时长t内所述显示分区中像素的最大像素值,所述γ为所述显示分区的伽马值,所述exp()为以自然常数e为底的指数函数。
  18. 根据权利要求14至17任一所述的装置,其特征在于,每个显示分区均包括多种颜色的像素,所述多种颜色的像素的显示颜色不同,所述第二获取模块,用于:
    基于任一显示分区中任一颜色的像素的使用参数与所述映射关系,分别获取所述任一显示分区中所述任一颜色的像素的第一亮度衰减系数,所述任一颜色的像素为所述多种颜色的像素中的任一种;
    所述补偿模块用于:
    基于所述显示分区中所述任一颜色的像素的第一亮度衰减系数,对所述显示分区中所述任一颜色的像素进行亮度补偿。
  19. 根据权利要求14至18任一所述的装置,其特征在于,所述装置还包括:
    第三获取模块,用于分别获取控制所述多个显示分区按照参考亮度进行显示时,每个显示分区的显示亮度;
    确定模块,用于基于每个显示分区的显示亮度和对应的参考亮度,确定每个显示分区的第二亮度衰减系数,所述第二亮度衰减系数用于反映所述显示亮度相对于对应的参考亮度的衰减程度;
    调整模块,用于当所述多个显示分区的亮度衰减差值不在第一参考范围内时,调整所述 映射关系,直至根据调整后的映射关系确定的亮度衰减差值位于所述第一参考范围内,所述亮度衰减差值基于所述多个显示分区中一个或多个显示分区的第二亮度衰减系数和第一亮度衰减系数确定;
    更新模块,用于基于调整后的映射关系,更新所述第一亮度衰减系数。
  20. 根据权利要求19所述的装置,其特征在于,所述映射关系表征亮度衰减系数随时间衰减参数、显示衰减参数、衰减常数和使用参数发生变化的情况,所述调整模块,用于:
    当所述一个或多个显示分区的衰减系数差值之和大于参考差值阈值时,调整所述时间衰减参数和所述衰减常数,直至根据调整后的时间衰减参数和衰减常数确定的所述一个或多个显示分区的衰减系数差值之和,小于或等于所述参考差值阈值,所述显示分区的衰减系数差值为所述显示分区的第二亮度衰减系数与所述显示分区的第一亮度衰减系数之差;
    基于所述多个显示分区中两个显示分区的第二亮度衰减系数,获取所述两个显示分区的第一亮度衰减比,所述第一亮度衰减比用于反映根据显示亮度确定的所述两个显示分区的亮度衰减差异程度;
    基于调整后的时间衰减参数和衰减常数,获取所述两个显示分区的第二亮度衰减比,所述第二亮度衰减比用于反映根据所述映射关系确定的所述两个显示分区的亮度衰减差异程度;
    当所述两个显示分区的第一亮度衰减比与第二亮度衰减比的第一差值不在第二参考范围内时,调整所述显示衰减参数,直至根据调整后的显示衰减参数确定的第一差值位于所述第二参考范围内。
  21. 根据权利要求20所述的装置,其特征在于,所述调整模块,还用于:
    获取所述多个显示分区中另外两个显示分区的第一亮度衰减比,所述另外两个显示分区与所述两个显示分区中存在一个或两个显示分区不同;
    基于调整后的时间衰减参数、显示衰减参数和衰减常数,获取所述另外两个显示分区的第二亮度衰减比;
    当所述另外两个显示分区的第一亮度衰减比与第二亮度衰减比的第二差值不在第三参考范围内时,将最小差距参数组合中的时间衰减参数、显示衰减参数和衰减常数分别确定为更新后的时间衰减参数、显示衰减参数和衰减常数;
    其中,参数调整过程得到的多组参数组合中,所述最小差距参数组合中的参数使得差值函数取得最小值,所述差值函数为第三差值的绝对值、第四差值的绝对值和第五差值的绝对值之和,所述第三差值为所述衰减系数差值之和与所述参考差值阈值的差值,所述第四差值为所述两个显示分区的第一差值与所述第二参考范围的边界值的差值,所述第五差值为所述另外两个显示分区的第二差值与所述第三参考范围的边界值的差值。
  22. 根据权利要求19至21任一所述的装置,其特征在于,所述显示分区的第二亮度衰减系数等于所述显示分区的显示亮度与所述显示分区对应的参考亮度的比值。
  23. 根据权利要求20至22任一所述的装置,其特征在于,第一显示分区和第二显示分 区的第一亮度衰减比等于所述第一显示分区的第二亮度衰减系数与所述第二显示分区的第二亮度衰减系数的比值;
    所述第一显示分区和所述第二显示分区的第二亮度衰减比等于所述第一显示分区的第一亮度衰减系数与所述第二显示分区的第一亮度衰减系数的比值。
  24. 根据权利要求14至23任一所述的装置,其特征在于,所述补偿模块,用于:
    基于所述显示分区的第一亮度衰减系数,确定所述显示分区的补偿增益;
    基于所述显示分区的补偿增益,对所述显示分区进行亮度补偿。
  25. 根据权利要求24所述的装置,其特征在于,所述补偿模块,用于:
    将所述多个显示分区中的目标显示分区的补偿增益确定为1;
    将所述目标显示分区的第一亮度衰减系数与其他显示分区的第一亮度衰减系数的比值,确定为所述其他显示分区的补偿增益,所述其他显示分区为所述多个显示分区中除所述目标显示分区外的任一显示分区。
  26. 根据权利要求25所述的装置,其特征在于,所述显示面板具有主显示分区、辅显示分区,以及,位于所述主显示分区和辅显示分区之间的弯折显示分区,所述主显示分区为所述目标显示分区。
  27. 一种显示面板的亮度补偿装置,其特征在于,所述装置包括:处理器和存储器;
    所述存储器,用于存储计算机程序,所述计算机程序包括程序指令;
    所述处理器,用于调用所述计算机程序,实现如权利要求1至13任一所述的显示面板的亮度补偿方法。
  28. 一种显示面板,其特征在于,所述显示面板包括:权利要求27所述的显示面板的亮度补偿装置。
  29. 一种计算机存储介质,其特征在于,所述计算机存储介质上存储有指令,当所述指令被处理器执行时,实现如权利要求1至13任一所述的显示面板的亮度补偿方法。
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CN110808006A (zh) * 2019-09-06 2020-02-18 华为技术有限公司 一种显示屏老化补偿方法、电路系统、电子设备

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CN113241030A (zh) * 2021-04-27 2021-08-10 广东小天才科技有限公司 一种显示屏亮度补偿方法、装置及电子设备
CN113241030B (zh) * 2021-04-27 2022-12-16 广东小天才科技有限公司 一种显示屏亮度补偿方法、装置及电子设备
CN114120875A (zh) * 2021-11-26 2022-03-01 福州京东方光电科技有限公司 叠屏显示设备的亮度调节方法、装置及叠屏显示设备

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