WO2020140313A1 - 一种亮度补偿方法、可折叠显示装置及存储介质 - Google Patents

一种亮度补偿方法、可折叠显示装置及存储介质 Download PDF

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Publication number
WO2020140313A1
WO2020140313A1 PCT/CN2019/075173 CN2019075173W WO2020140313A1 WO 2020140313 A1 WO2020140313 A1 WO 2020140313A1 CN 2019075173 W CN2019075173 W CN 2019075173W WO 2020140313 A1 WO2020140313 A1 WO 2020140313A1
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Prior art keywords
brightness
screens
sub
display
value
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English (en)
French (fr)
Inventor
徐宁
孙家松
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Shenzhen Royole Technologies Co Ltd
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Shenzhen Royole Technologies Co Ltd
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Priority to CN201980073111.6A priority Critical patent/CN113261050A/zh
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

Definitions

  • the present invention relates to the field of display, and in particular to a brightness compensation method, a foldable display device, and a storage medium.
  • the foldable display device has a fully expanded state, that is, all the sub-screens are fully expanded to form a common display screen, which meets the user's size requirements; a fully folded state, that is, all the sub-screens are moved by winding, folding, etc.
  • the size of the terminal is minimized to meet people's needs for portability; and the intermediate state, that is, the sub-screens are not fully expanded, but the mobile terminal has not reached the state of minimum size.
  • the brightness of each sub-screen is accumulated with the use time
  • the degree of attenuation is also different.
  • the brightness of each split screen will be inconsistent, that is, the same display screen will appear different The brightness value, which will seriously affect the user experience.
  • the object of the present invention is to solve the problem of inconsistent brightness in various areas of the foldable display device.
  • a brightness compensation method which is applied to a foldable display device including a plurality of sub-screens, each of which has an initial brightness value when initially used; the method includes:
  • the at least two brightness compensation values perform brightness compensation on the at least two co-display sub-screens respectively, so that the difference in brightness between the at least two co-display sub-screens is within a preset range.
  • a foldable display device which includes a plurality of sub-screens, a processor, and a memory, the plurality of sub-screens each having an initial brightness value during initial use, wherein the memory stores a computer-readable program,
  • the computer-readable program is configured to be executed by the processor, and when the computer-readable program is executed by the processor, it is implemented:
  • the at least two brightness compensation values perform brightness compensation on the at least two co-display sub-screens respectively, so that the difference in brightness between the at least two co-display sub-screens is within a preset range.
  • a computer-readable storage medium on which a computer-readable program is stored, and when the computer-readable program is executed by a processor, the above method is implemented.
  • the beneficial effect lies in: determining at least two brightness compensation values by detecting at least two brightness attenuation values corresponding to at least two co-display sub-screens in a co-display state, and according to at least two brightness compensation values
  • the two co-display sub-screens are separately compensated for brightness so that the difference in brightness between at least two co-display sub-screens is within a preset range.
  • only the brightness compensation is performed on the co-display sub-screen.
  • the brightness compensation value is determined based on the brightness attenuation value, and on the premise of achieving uniform brightness, the achievable brightness compensation value is selected to improve the achievability of brightness compensation.
  • FIG. 1 is an application scenario diagram of a brightness compensation method in an embodiment of the invention
  • FIG. 2 is a flowchart of a brightness compensation method provided by an embodiment of the present invention.
  • FIG. 3 is a flowchart of detecting at least two brightness attenuation values corresponding to at least two co-display sub-screens in the co-display state according to an embodiment of the present invention
  • FIG. 4 is a flowchart of determining at least two brightness compensation values corresponding to the at least two co-display sub-screens based on the at least two brightness attenuation values according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a brightness compensation method provided by an embodiment of the present invention.
  • FIG. 6 is a flowchart of a brightness compensation method provided by an embodiment of the present invention.
  • FIG. 7 is a flowchart of determining whether a foldable display device is in a co-display state according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of determining whether to perform brightness compensation on at least two co-display sub-screens according to at least two brightness compensation values according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a foldable display device provided by the present invention.
  • the “cumulative usage time” mentioned in the context indicates the cumulative value of the usage time of the sub-screen from the factory, regardless of the current folding state of the sub-screen, whether it is a co-display sub-screen, as long as the sub-screen is displayed The status is included in the cumulative usage time of the sub-screen.
  • FIG. 1 is an application scene diagram of a brightness compensation method according to an embodiment of the present invention.
  • the brightness compensation method is applied to a foldable display device.
  • the foldable display device includes a plurality of sub-screens that can be relatively transported around a rotation axis, or a flexible screen that can be bent or wound arbitrarily as a whole, or a combination of the two, and other functions that have a common display expansion state and a closed display function or are displayed separately Display device in folded state.
  • the plurality of sub-screens (including two or more) of the foldable display device includes a plurality of bending portions 11 and non-bending portions 12 which are arranged at intervals.
  • the "co-display state” referred to in the context means that at least two sub-screens of the foldable display device together constitute the same display interface. Specifically, the at least two sub-screens are continuous, that is, there are no sub-screens other than the at least two sub-screens in between.
  • the sub-screens that together constitute the same display interface are referred to as "co-display sub-screens" in context. It should be particularly pointed out that the "co-display sub-screen” here is not a static concept, that is, the sub-screens referred to by the "co-display sub-screen” are different in different display states.
  • the foldable display device 1 includes sub-screens A, B, and C (not shown in the figure) that are connected in turn, and when the foldable display device is fully expanded, the co-display sub-screen indicates that the sub-screens A, B, and C are included.
  • the foldable display device 1 is completely folded, then the foldable display device 1 is in a non-co-display state, so there is no co-display sub-screen.
  • a and B together form the same display interface, and C displays or does not display separately, A and B are the co-display sub-screens; and when B and C together form the same display interface, and A displays or does not display separately, B and C are the co-display screens.
  • the brightness compensation method provided by an embodiment of the present invention includes:
  • Step S101 Detect at least two brightness attenuation values corresponding to at least two co-display sub-screens in the co-display state, and the at least two co-display sub-screens together constitute the same display interface.
  • the multiple sub-screens each have an initial brightness value during initial use
  • the memory stores a mapping relationship between the effective use duration of the sub-screen and the brightness attenuation value.
  • the memory not only stores the mapping relationship between the effective use time of the co-display sub-screen and the brightness attenuation value, but also stores the mapping relationship between the effective use time of the non-co-display sub-screen and the brightness attenuation value. This is because whether a certain sub-screen is a co-display sub-screen is determined according to the bending state of the foldable display device. Therefore, whether a sub-screen is a co-display sub-screen depends on the current folding state.
  • the effective use time represents the cumulative use time of the sub-screen in the default setting brightness state, or has a linear relationship with the cumulative use time in the default setting brightness state.
  • the effective use duration may be, for example, the cumulative use duration of the sub-screen under the brightness driven by the first driving current or voltage; when the display state of the sub-screen is content with high contrast or relatively high brightness requirements, The driving current or voltage is increased to the second driving current or voltage, and its effective use duration is greater than the accumulated use duration; otherwise, it is less than the effective use duration.
  • the specific conversion method can be converted, for example, by the ratio of the required second driving current or voltage to the first driving current or voltage. However, this application is not limited to the conversion methods stated here.
  • the effective use time mentioned above is not only positively related to the cumulative use time, but also positively related to the brightness of the sub-screen settings. That is, the set brightness of the sub-screen (because the set brightness is not constant during use, the set brightness here can be understood as the set of set brightness at each time point, or it can be understood as the entire use process, set The higher the average value of the constant brightness, the longer the effective use time per unit of use time, otherwise, the shorter the effective use time per unit of time.
  • each sub-screen of the plurality of sub-screens are preset brightness setting screen has 3 sub A -, A, A +, in a factory state (in other words, in the sub-screen where the luminance attenuation does not occur) that, in actual luminance of the three sub-screen brightness setting is the a -, a, a +.
  • the luminance of the sub-screen attenuation [Delta] A at this time, the actual luminance in the three sub-screen luminance is set to A - - ⁇ A, A- ⁇ A , A + - ⁇ A.
  • the “set brightness” defined here does not mean the actual brightness, but the brightness without any attenuation. It should be noted that, in other embodiments, the same sub-screen has different attenuation values under three set brightnesses.
  • the set brightness of the sub-screen is A - ; in the period t2, the set brightness of the sub-screen is A; in the period t3, the set brightness of the sub-screen is A + .
  • the effective use time of the sub-screen is T ⁇ , then T ⁇ and T have a positive correlation. In other words, when the set brightness distribution ratio of the sub-screen is unchanged, the larger T , The greater T ⁇ .
  • T ⁇ has a positive correlation with the set brightness of the sub-screen (in other words, the average value of the set brightness of the sub-screen). In other words, when T is constant, the larger the proportion of t3, then The bigger T ⁇ is.
  • the effective use time is linearly proportional to the product of the cumulative use time of the sub-screen and the average value of the set brightness of the sub-screen.
  • C is a normal number, and the value of C can be set by the user.
  • the co-display sub-screen is used for brightness attenuation detection, which is used for the brightness compensation mentioned below. Compared with the brightness compensation for all sub-screens in the display state, it is guaranteed to constitute the same display The brightness uniformity of the interface also reduces the compensation power consumption.
  • step S101 includes:
  • Step S201 Count at least two effective usage time periods corresponding to the at least two co-display sub-screens.
  • Step S202 Based on the mapping relationship and the at least two effective use durations, determine at least two brightness attenuation values corresponding to the at least two co-display sub-screens.
  • mapping relationship stored in the memory mentioned above is obtained through multiple studies of the correspondence between the brightness attenuation of the foldable device and the effective use time, so as to obtain the mapping relationship closest to the actual situation.
  • each sub-screen corresponds to a mapping relationship
  • the brightness attenuation value of the sub-screen in the co-display state is calculated according to the effective use time of each sub-screen and the mapping relationship.
  • mapping relationships and initial brightness values of the multiple sub-screens are the same. It should be noted that the mapping relationship and initial brightness values of the multiple sub-screens may also be different.
  • Step S102 Determine at least two brightness compensation values corresponding to the at least two co-display sub-screens based on the at least two brightness attenuation values.
  • the brightness compensation value is determined based on the brightness attenuation value. On the premise of achieving uniform brightness, the achievable brightness compensation value is selected to improve the achievability of brightness compensation.
  • step S102 includes:
  • Step S301 Determine a weighted average brightness attenuation value based on the at least two brightness attenuation values, and the weighted average brightness attenuation value is a weighted average of the plurality of brightness attenuation values.
  • At least two luminance attenuation values have the same weight
  • the weighted average luminance attenuation value is the average of at least two luminance attenuation values.
  • the number of sub-screens in the co-display state is 3, and the three brightness attenuation values are 30%L, 20%L, and 10%L, respectively, where L is the initial brightness value, then the calculated weighted average brightness attenuation The value is 20% L.
  • the weights of at least two brightness attenuation values may also be different.
  • the number of sub-screens in a co-display state is three, and the three brightness attenuation values and weights are 30% L, 45%, 20%L, 10% and 10%L, 45%, then the brightness attenuation value is:
  • the weight of the at least two brightness attenuation values is proportional to the area of the at least two co-display sub-screens; alternatively, the weight of the at least two brightness attenuation values is The drive current or drive voltage required when the two co-display screens are set to the same brightness is proportional.
  • the beneficial effect of this process is that the larger the co-display sub-screen, or the larger the drive current or voltage required to achieve the same brightness, then when the subsequent brightness compensation, the co-display sub-screen under the premise of the same compensation value
  • the driving current or voltage is also larger, so when calculating the brightness attenuation, it is necessary to more consider the co-display sub-screen with a larger screen or a larger driving current or voltage under the premise of the same compensation brightness.
  • the above embodiment is very effective to differentiate the brightness compensation value of each co-display sub-screen, so that in the subsequent steps In the middle, the display brightness of the folded display device after brightness compensation is made more uniform.
  • the brightness closest to the current brightness of each co-display sub-screen can be found; or, on the premise that the brightness of each co-display sub-screen is the same or substantially the same, the overall brightness compensation is minimized
  • the value in other words, minimizes the overall drive current or drive voltage required for brightness compensation.
  • Step S302 Based on the weighted average brightness attenuation value and the at least two brightness attenuation values, determine at least two brightness compensation values corresponding to the at least two co-display sub-screens.
  • the number of co-display sub-screens is 3, the three brightness attenuation values are 30%L, 20%L and 10%L, respectively, and the calculated weighted average brightness attenuation value is 20%L Then, the brightness compensation value of each sub-screen of the industrial display sub-screen is 10%, 0 and -10%, respectively.
  • Step S103 Perform brightness compensation on the at least two co-display sub-screens respectively according to the at least two brightness compensation values, so that the brightness difference between the at least two co-display sub-screens is within a preset range.
  • the preset range mentioned above includes 0, that is, the brightness between the at least two co-display sub-screens is completely the same.
  • the preset range mentioned above is a threshold range, such as 2%, that is, the difference between the maximum brightness and the minimum brightness between each sub-screen is maintained within 2%.
  • the setting of the preset range is set according to the threshold point at which the human eye can recognize the difference in brightness.
  • the brightness compensation value includes the compensation value of the drive voltage or drive current of at least two co-display sub-screens, and the drive voltage or drive current is used to drive at least two co-display sub-screens for brightness compensation;
  • the brightness compensation of the two co-display screens includes adjusting the drive voltage or drive current of the at least two co-display screens according to the compensation value of the drive voltage or drive current, respectively Brightness compensation.
  • the brightness compensation method proposed above determines the brightness compensation value by detecting at least two brightness attenuation values of at least two co-display sub-screens in the co-display state, and performs the sub-screens in the co-display state according to the brightness compensation value Brightness compensation to ensure the uniformity of brightness under the co-display state of the foldable display device.
  • the brightness compensation method provided by an embodiment of the present invention includes:
  • Step S401 Detect at least two brightness attenuation values corresponding to at least two co-display sub-screens in the co-display state, and the at least two co-display sub-screens together constitute the same display interface.
  • Step S402 Determine at least two brightness compensation values corresponding to the at least two co-display sub-screens based on the at least two brightness attenuation values.
  • Step S403 According to the at least two brightness compensation values, perform brightness compensation on the at least two co-display sub-screens respectively, so that the brightness difference between the at least two co-display sub-screens is within a preset range.
  • Step S404 Periodically obtain the effective use duration of the multiple sub-screens.
  • the co-display screen During the use of the co-display screen, record the duration of use, and periodically obtain the effective duration of use. That is, after a certain period of time, the effective use time is obtained, and the brightness compensation value of the co-display sub-screen is recalculated according to the effective use time, so as to more accurately compensate the brightness of the co-display sub-screen, and to ensure the uniformity of the co-display sub-screen brightness.
  • the brightness compensation method provided by an embodiment of the present invention includes:
  • Step S501 Determine whether the foldable display device is in a co-display state.
  • step S501 includes:
  • Step S601 Detect the angle between each adjacent bending part and the non-bending part.
  • Step S602 If at least one of the included angles is within a preset angle range, it is determined that the foldable display device is in a co-display state.
  • each sub-screen on the same plane in the foldable display device is set as a sub-screen in a co-display state.
  • the angle between one adjacent bending part and the non-bending part is 180 degrees, it is determined that the foldable display device is in the co-display state.
  • the user may not fully flatten the foldable display device, or because the foldable display device fails to fully unfold, but at this time between the bent portion and the non-bent portion If the included angle satisfies, the same display interface can be formed.
  • the angle is the acceptable bending angle of the user, and the foldable display device is also judged to be in the co-display state.
  • the preset angle range is -30°-30°, and in another embodiment, the preset angle range is -10°-10° or -15°-15°.
  • Step S502 Detect at least two brightness attenuation values corresponding to at least two co-display sub-screens in the co-display state.
  • Step S503 Determine at least two brightness compensation values corresponding to the at least two co-display sub-screens based on the at least two brightness attenuation values.
  • Step S504 Perform brightness compensation on the at least two co-display sub-screens respectively according to the at least two brightness compensation values, so that the difference in brightness between the at least two co-display sub-screens is within a preset range.
  • the method before performing brightness compensation on the at least two co-display sub-screens, the method further includes:
  • Step S701 According to the at least two brightness attenuation values, determine whether the absolute value of the difference between the maximum value and the minimum value of the at least two brightness attenuation values is greater than a preset threshold.
  • Step S702 If the absolute value of the difference between the maximum value and the minimum value of the at least two brightness attenuation values is greater than a preset threshold, perform at least two common display sub-screens according to the at least two brightness compensation values Brightness compensation.
  • the brightness compensation of the co-display sub-screen may not be performed. If the difference between the attenuation values is large, the brightness of the co-display sub-screens are compensated separately.
  • the preset threshold is set to 5% L, and if the brightness attenuation values of the three co-display sub-screens are 10% L, 12% L, and 13% L, respectively, no brightness compensation is performed on the co-display sub-screen. If the brightness attenuation values of the three co-display sub-screens are 10% L, 15% L, and 20% L, respectively, the brightness compensation is performed on the co-display sub-screen.
  • a foldable display device which includes a plurality of sub-screens 13, a processor 14, and a memory 15, the memory 15 stores a computer-readable program, which is implemented when the computer-readable program is executed by the processor 14.
  • a brightness compensation method provided by some embodiments of the invention is provided to ensure the uniformity of brightness when the foldable display device is unfolded.
  • brightness compensation is respectively performed on the at least two co-display sub-screens, so that the brightness difference between the at least two co-display sub-screens is within a preset range.
  • the foldable display device includes a memory storing a mapping relationship between the effective use time of the sub-screen and the brightness attenuation value; when the computer-readable program is executed by the processor, it is also implemented:
  • At least two brightness attenuation values corresponding to the at least two co-display sub-screens are determined.
  • mapping relationship and the initial brightness value of the multiple sub-screens are respectively the same.
  • At least two brightness compensation values corresponding to the at least two co-display sub-screens are determined.
  • the at least two brightness attenuation values have the same weight.
  • the brightness compensation value includes the compensation value of the driving voltage or the driving current of the at least two co-display sub-screens, and the driving voltage or the drive current is used to drive the at least two co-display sub-screens for brightness compensation;
  • the computer may
  • the reader program is also implemented when executed by the processor:
  • the foldable display device includes a plurality of bending portions and non-bending portions arranged at intervals, and the computer readable program is also implemented when executed by the processor:
  • the device in this embodiment and the method in the previous embodiment are based on two aspects under the same inventive concept.
  • the method implementation process has been described in detail in the foregoing, so those skilled in the art can clearly understand the For the sake of brevity of the description, the implementation process of the device in the embodiment will not be repeated here.
  • Some embodiments also provide a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., on which a computer-readable program is stored, and the computer-readable program is executed by a processor to implement the above method.
  • a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc.
  • the brightness compensation method, foldable display device and storage medium proposed above determine at least two brightness compensation values by detecting at least two brightness attenuation values corresponding to at least two co-display sub-screens in a co-display state, according to At least two brightness compensation values respectively perform brightness compensation on at least two co-display sub-screens, so that the brightness difference between the at least two co-display sub-screens is within a preset range, thereby controlling the consistency of the brightness of each sub-screen and ensuring The uniformity of brightness when the foldable display device is unfolded.

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Abstract

提供一种亮度补偿方法、可折叠显示装置及存储介质，亮度补偿方法应用于包括多个子屏幕的可折叠显示装置，多个子屏幕分别具有初始使用时的初始亮度值；方法包括：检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，至少两个共显子屏幕共同构成同一显示界面；基于至少两个亮度衰减值确定与至少两个共显子屏幕对应的至少两个亮度补偿值；根据至少两个亮度补偿值，对至少两个共显子屏幕分别进行亮度补偿，以使至少两个共显子屏幕之间的亮度差异位于预设范围内，从而控制各子屏幕亮度的一致性，保证共显子屏幕亮度的均匀性。

Description

一种亮度补偿方法、可折叠显示装置及存储介质 技术领域
本发明涉及显示领域，尤其涉及一种亮度补偿方法、可折叠显示装置及存储介质。
背景技术
随着人们对移动终端显示区域的需求越来越大，移动终端的尺寸正在朝着越来越大的趋势发展。然而，随着尺寸的增大，移动终端的便携性成为亟待解决的问题。可折叠显示装置的出现解决了这一问题。可折叠显示装置具有完全展开状态，即所有的子屏幕完全展开形成一个共同显示的屏幕，满足了用户对尺寸的需求；完全折叠状态，即所有的子屏幕通过卷绕、折叠等方式使该移动终端的尺寸达到最小化，满足了人们对便携性的需求；以及中间状态，即子屏幕之间未完全展开，但移动终端亦未达到尺寸最小化的状态。尤其在中间状态下，移动终端中只有一部分子屏幕处于被使用状态，或者各个子屏幕在共同使用，但由于被分别设置成了不同的显示模式，随着使用时间的累积，各个子屏幕的亮度衰减程度亦不同。如此，在完全展开状态下，或者若干连续子屏幕形成共屏共同显示一显示界面的情况下，由于各个子屏幕亮度衰减程度不一致，会导致各个分屏的亮度不致，即，同一显示画面出现不同的亮度值，这会严重影响用户体验。
发明内容
为了克服现有技术的不足，本发明的目的在于解决可折叠显示装置各个区域亮度不一致的问题。
一方面，提供一种亮度补偿方法，应用于包括多个子屏幕的可折叠显示装 置，所述多个子屏幕分别具有初始使用时的初始亮度值；所述方法包括：
检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，所述至少两个共显子屏幕共同构成同一显示界面；
基于所述至少两个亮度衰减值确定与所述至少两个共显子屏幕对应的至少两个亮度补偿值；
根据所述至少两个亮度补偿值，对所述至少两个共显子屏幕分别进行亮度补偿，以使所述至少两个共显子屏幕之间的亮度差异位于预设范围内。
另一方面，还提供一种可折叠显示装置，包括多个子屏幕、处理器和存储器，所述多个子屏幕分别具有初始使用时的初始亮度值，其中所述存储器中存储有计算机可读程序，所述计算机可读程序被配置成由所述处理器执行，所述计算机可读程序被所述处理器执行时实现：
检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，所述至少两个共显子屏幕共同构成同一显示界面；
基于所述至少两个亮度衰减值确定与所述至少两个共显子屏幕对应的至少两个亮度补偿值；
根据所述至少两个亮度补偿值，对所述至少两个共显子屏幕分别进行亮度补偿，以使所述至少两个共显子屏幕之间的亮度差异位于预设范围内。
另一方面，还提供一种计算机可读存储介质，其上存储有计算机可读程序，所述计算机可读程序被处理器执行时实现上述的方法。
综上，有益效果在于：通过检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，确定至少两个亮度补偿值，根据至少两个亮度补偿值对至少两个共显子屏幕分别进行亮度补偿，以使至少两个共显子屏幕之间的亮度差异位于预设范围内。一方面，仅对共显子屏幕进行亮度补偿，相对于 对所有显示状态下的子屏幕进行亮度补偿而言，即保证了构成同一显示界面的亮度均匀性，也降低了补偿功耗；另一方面，基于亮度衰减值确定亮度补偿值，在实现亮度均匀的前提下，选取可实现的亮度补偿值，提高了亮度补偿的可实现性。
附图说明
图1为本发明一实施例中亮度补偿方法的应用场景图；
图2为本发明一实施例提供的亮度补偿方法流程图；
图3为本发明一实施例提供的检测处于该共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值的流程图；
图4为本发明一实施例提供的基于所述至少两个亮度衰减值确定与所述至少两个共显子屏幕对应的至少两个亮度补偿值的流程图；
图5为本发明的一实施例提供的亮度补偿方法流程图；
图6为本发明的一实施例提供的亮度补偿方法流程图；
图7为本发明一实施例提供的判断可折叠显示装置是否处于共显状态的流程图；
图8为本发明一实施例提供的判断是否执行根据至少两个亮度补偿值对至少两个共显子屏幕分别进行亮度补偿的流程图；
图9为本发明提供的可折叠显示装置的示意图。
具体实施方式
下面，结合附图以及具体实施方式，对本发明做进一步描述，需要说明的是，在不相冲突的前提下，以下描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例。
需要说明的是，上下文提到的“累计使用时间”表示子屏幕从出厂起的使用时间的累加值，无论该子屏幕当前的折叠状态如何，是否为共显子屏幕，只要该子屏幕处于显示状态，则均计入该子屏幕的累计使用时间。
图1为本发明一实施例提供的亮度补偿方法的应用场景图，该亮度补偿方法应用于可折叠显示装置。可折叠显示装置包括可绕转轴相对转运的多个子屏幕，或者整体可任意弯曲或卷绕的柔性屏，或者两者的结合，以及其他具有实现共同显示的展开状态和关闭显示功能或分别显示的折叠状态的显示装置。在一非限制性实施例中，可折叠显示装置的多个子屏幕(包括两个及两个以上)包括多个间隔设置的折弯部11和非折弯部12。上下文所指的“共显状态”表示该可折叠显示装置的至少两个子屏幕共同构成同一个显示界面。具体地，该至少两个子屏幕为连续的，即中间未间隔有除该至少两个子屏幕之外的其他子屏幕。而该共同构成同一显示界面的子屏幕即为上下文所指的“共显子屏幕”。需要特别指出的是，这里的“共显子屏幕”并非一个静态的概念，即在不同的显示状态下，该“共显子屏幕”所指代的子屏幕是不同的。例如，可折叠显示装置1包括依次可转动连接的子屏幕A，B，C(图中未示出)，当可折叠显示装置完全展开时，共显子屏幕表示包括子屏幕A，B，C；当可折叠显示装置1完全折叠时，则此时该可折叠显示装置1处于非共显状态下，因此不存在共显子屏幕。当A，B共同构成同一显示界面，而C单独显示或者不显示时，A，B即为该共显子屏幕；而当B，C共同构成同一显示界面，而A单独显示或者不显示时，B，C即为该共显子屏幕。
如图2所示，本发明一实施例提供的亮度补偿方法，包括：
步骤S101：检测处于该共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，该至少两个共显子屏幕共同构成同一显示界面。
其中，多个子屏幕分别具有初始使用时的初始亮度值，存储器中存储有子屏幕的有效使用时长与亮度衰减值的映射关系。需要说明一点，存储器中不仅存储有共显子屏幕的有效使用时长与亮度衰减值的映射关系，还存储有非共显子屏幕的有效使用时长与亮度衰减值的映射关系。这是因为某一子屏幕是否为共显子屏幕是根据该可折叠显示装置的弯折状态而决定的。因此，某一子屏幕是否为共显子屏幕取决于当前的折叠状态。
具体地，有效使用时间表示该子屏幕在默认设定亮度状态下的累计使用时长，或者与默认设定亮度状态下的累计使用时间呈正比例线性关系。进一步地，该有效使用时长例如可以为该子屏幕在第一驱动电流或电压驱动下的亮度下的累计使用时长；当该子屏幕的显示状态为对比度较高或者亮度需求比较高的内容时，驱动电流或电压升高为第二驱动电流或电压，其有效使用时长要大于该累计使用的时长；反之，则小于该有效使用时长。具体折算方式例如可以通过其所需的第二驱动电流或电压与该第一驱动电流或电压的比例进行折算。然而，本申请并不限于此处陈述的折算方式。
综上，上文提到的有效使用时间不仅与累计使用时间正相关，并且与子屏幕设定亮度正相关。即子屏幕的设定亮度(由于在使用过程中，设定亮度不是一成不变的，这里的设定亮度可以理解为每个时间点的设定亮度的集合，也可以理解为整个使用过程中，设定亮度的平均值)越高，则单位使用时间下的有效使用时间越长，反之，则单位时间下的有效使用时间越短。
例如，该多个子屏幕中的每个子屏幕均预设有3个子屏幕设定亮度A -，A，A +，在出厂状态下(换言之，在该子屏幕未发生亮度衰减的情况下)，该子屏幕在该三个设定亮度下的实际亮度即为A -，A，A +。在使用一段时间后，该子屏幕的亮度衰减为ΔA，则此时，该子屏幕在该三个设定亮度下的实际亮度为A -- ΔA，A-ΔA，A +-ΔA。这里需要说明的是，这里的定义的“设定亮度”并非表示实际亮度，而是未发生任何衰减下的亮度。需要说明的是，不排除在其他实施例中，同一个子屏幕在三个设定亮度下的衰减值不同的情况。
一子屏幕的累计使用时间为T，其中T＝t1+t2+t3。在t1时段中，子屏幕的设定亮度为A -；在t2时段中，子屏幕的设定亮度为A；在t3时段中，子屏幕的设定亮度为A +。则如上文所提到的，该子屏幕的有效使用时间为T`，则T`与T呈正相关的关系，换言之，在该子屏幕的设定亮度分配比例不变的情况下，T越大，则T`越大。此外，T`与子屏幕的设定亮度(换言之，与该子屏幕的设定亮度的平均值)亦呈正相关的关系，换言之，在T恒定的情况下，t3所占的比例越大，则T`越大。
进一步地，有效使用时间与子屏幕的累计使用时间和子屏幕设定亮度的平均值的乘积正比例线性相关。具体地，子屏幕设定亮度的平均值A`＝(t1*A -+t2*A+t3*A +)/T。则该子屏幕的有效使用时间即为：T`＝T*A`*C。其中C为一正常数，该C的值可由用户设定。
如上文提到的，仅对共显子屏幕进行亮度衰减的检测，用于下文将提到的亮度补偿，相对于对所有显示状态下的子屏幕进行亮度补偿而言，即保证了构成同一显示界面的亮度均匀性，也降低了补偿功耗。
如图3所示，在一种实施方式中，步骤S101包括：
步骤S201：统计该至少两个共显子屏幕对应的至少两个有效使用时长。
步骤S202：基于该映射关系和该至少两个有效使用时长，确定与该至少两个共显子屏幕对应的至少两个亮度衰减值。
而上文提到的存储器所存储的映射关系，是通过对该可折叠装置的亮度衰减与有效使用时长的对应关系通过多次学习而获得的，从而获得最接近于实际 情况的映射关系。
在一种实施方式中，每个子屏幕对应一个映射关系，根据各子屏幕的有效使用时长和映射关系计算出共显状态下的子屏幕的亮度衰减值。
进一步地，该多个子屏幕的映射关系及初始亮度值分别相同。需要说明的是，该多个子屏幕的映射关系及初始亮度值也可以不同。
步骤S102：基于该至少两个亮度衰减值确定与该至少两个共显子屏幕对应的至少两个亮度补偿值。
基于亮度衰减值确定亮度补偿值，在实现亮度均匀的前提下，选取可实现的亮度补偿值，提高了亮度补偿的可实现性。
如图4所示，在一种实施方式中，步骤S102包括：
步骤S301：基于该至少两个亮度衰减值确定一加权平均亮度衰减值，该加权平均亮度衰减值为该多个亮度衰减值的加权平均值。
在一种实施方式中，至少两个亮度衰减值的权重相同，加权平均亮度衰减值为至少两个亮度衰减值的平均值。例如，处于共显状态下的子屏幕的数量为3个，3个亮度衰减值分别为30％L、20％L和10％L，其中L为初始亮度值，则计算出的加权平均亮度衰减值为20％L。
在其他实施方式中，至少两个亮度衰减值的权重也可以不同，例如，处于共显状态下的子屏幕的数量为3个，3个亮度衰减值和权重分别为30％L，45％、20％L，10％和10％L，45％，则此时亮度衰减值为：
(30％L*45％+20％L*10％+10％L*45％)＝19％L。
在一具体实施例中，该至少两个亮度衰减值的权重与该至少两个共显子屏幕的面积成正比；替换性地，该至少两个亮度衰减值的权重与初始使用时将该至少两个共显子屏幕设置为相同亮度时所需的驱动电流或驱动电压正成比。这 样处理的有益效果在于，共显子屏幕越大，或者实现相同亮度所需的驱动电流或电压越大，则后续亮度补偿时，该共显子屏幕在相同的补偿值的前提下所需的驱动电流或电压亦越大，因此在计算亮度衰减时，需要更多地考虑屏幕更大或者在相同的补偿亮度的前提下所需的驱动电流或电压更大的共显子屏幕。
如上文所述，相对于未知亮度衰减值的情况下，即对各个共显子屏幕进行亮度补偿，上述实施例非常有效地将各个共显子屏幕的亮度补偿值进行差异化，从而在后续步骤中，使得亮度补偿后的折叠显示装置的显示亮度更加均匀。
此外，通过获取加权平均亮度衰减值，可以找到与各个共显子屏幕的当前亮度最接近的亮度；或者，在满足各个共显子屏幕的亮度相同或基本相同的前提下，最小化整体亮度补偿值，换言之，最小化亮度补偿所需的整体驱动电流或驱动电压。
步骤S302：基于该加权平均亮度衰减值和该至少两个亮度衰减值，确定该至少两个共显子屏幕对应的至少两个亮度补偿值。
例如，以权重完全相同为例，共显子屏幕的数量为3个，3个亮度衰减值分别为30％L、20％L和10％L，计算出的加权平均亮度衰减值为20％L，则该工显子屏幕的各子屏幕的亮度补偿值分别为10％、0和-10％。
步骤S103：根据该至少两个亮度补偿值，对该至少两个共显子屏幕分别进行亮度补偿，以使该至少两个共显子屏幕之间的亮度差异位于预设范围内。
具体地，上文所述的预设范围包括0，即该至少两个共显子屏幕之间的亮度完全相同。替换性地，上文所述的预设范围为一阈值范围，如2％，即各子屏幕间的最大亮度与最小亮度的差异维持在2％内。该预设范围的设定依照人眼可识别亮度差异的阈值点而设定。
在一种实施方式中，亮度补偿值包括至少两个共显子屏幕的驱动电压或者 驱动电流的补偿值，驱动电压或者驱动电流用于驱动至少两个共显子屏幕进行亮度补偿；对该至少两个共显子屏幕分别进行亮度补偿包括：根据该驱动电压或者驱动电流的补偿值分别调整该至少两个共显子屏幕的驱动电压或者驱动电流，对该至少两个共显子屏幕分别进行亮度补偿。
上文提出的亮度补偿方法，通过检测共显状态下的至少两个共显子屏幕的至少两个亮度衰减值，确定出亮度补偿值，根据亮度补偿值对共显状态下的各子屏幕进行亮度补偿，保证可折叠显示装置共显状态下亮度的均匀性。
如图5所示，本发明一实施例提供的亮度补偿方法包括：
步骤S401：检测处于该共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，该至少两个共显子屏幕共同构成同一显示界面。
步骤S402：基于该至少两个亮度衰减值确定与该至少两个共显子屏幕对应的至少两个亮度补偿值。
步骤S403：根据该至少两个亮度补偿值，对该至少两个共显子屏幕分别进行亮度补偿，以使该至少两个共显子屏幕之间的亮度差异位于预设范围内。
步骤S404：定期获取该多个子屏幕的有效使用时长。
共显子屏幕使用过程中，记录使用时长，定期获取有效使用时长。即使用一定时间后，获取有效使用时长，根据有效使用时长重新计算共显子屏幕的亮度补偿值，以对共显子屏幕的亮度进行更精确的补偿，保证共显子屏幕亮度的均匀性。
如图6所示，本发明一实施例提供的亮度补偿方法，包括：
步骤S501：判断该可折叠显示装置是否处于共显状态。
如图7所示，步骤S501包括：
步骤S601：检测每个相邻的该折弯部和该非折弯部之间的夹角角度。
步骤S602：若至少一个该夹角角度在预设角度范围内，则判断该可折叠显示装置处于共显状态。
例如，设定可折叠显示装置中处于同一平面的各子屏幕为处于共显状态下的子屏幕。当有一个相邻的折弯部和非折弯部之间的夹角角度为180度时，则判定可折叠显示装置处于共显状态。然而，由于在用户使用该可折叠显示装置时，用户可能未将该可折叠显示装置完全展平，或者由于可折叠显示装置未能完全展开，但是此时折弯部和非折弯部之间的夹角满足可以构成同一个显示界面，换言之，该角度为用户可接受弯折角度，则亦判断该可折叠显示装置处于共显状态。在一具体实施例中，该预设角度范围为-30°～30°，在另一实施例中，该预设角度范围为-10°～10°或-15°～15°。
步骤S502：检测处于该共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值。
步骤S503：基于该至少两个亮度衰减值确定与该至少两个共显子屏幕对应的至少两个亮度补偿值。
步骤S504：根据该至少两个亮度补偿值，对该至少两个共显子屏幕分别进行亮度补偿，以使该至少两个共显子屏幕之间的亮度差异位于预设范围内。
如图8所示，在本发明另一实施方式中，在对该至少两个共显子屏幕分别进行亮度补偿之前还包括：
步骤S701：根据该至少两个亮度衰减值，判断该至少两个亮度衰减值中的最大值和最小值的差值的绝对值是否在大于预设阈值。
步骤S702：若该至少两个亮度衰减值中的最大值和最小值的差值的绝对值大于预设阈值，则执行根据该至少两个亮度补偿值对该至少两个共显子屏幕分别进行亮度补偿。
具体的，共显状态下，若该至少两个亮度衰减值的差异较小，不足以影响共显子屏幕的均匀性，则可以不对共显子屏幕进行亮度补偿，若共显子屏幕的亮度衰减值之间的差异较大，则对共显子屏幕分别进行亮度补偿。
例如，设定预设阈值为5％L，若3个共显子屏幕的亮度衰减值分别为10％L、12％L和13％L，则不对共显子屏幕进行亮度补偿。若3个共显子屏幕的亮度衰减值分别为10％L、15％L和20％L，则对共显子屏幕进行亮度补偿。
如图9所示，还提供一种可折叠显示装置，包括多个子屏幕13、处理器14和存储器15，存储器15中存储有计算机可读程序，计算机可读程序被处理器14执行时实现本发明一些实施例提供的亮度补偿方法，以保证可折叠显示装置展开时亮度的均匀性。该计算机可读程序被处理器执行时实现下述步骤：
检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，该至少两个共显子屏幕共同构成同一显示界面；
基于该至少两个亮度衰减值确定与该至少两个共显子屏幕对应的至少两个亮度补偿值；
根据该至少两个亮度补偿值，对该至少两个共显子屏幕分别进行亮度补偿，以使该至少两个共显子屏幕之间的亮度差异位于预设范围内。
进一步地，该可折叠显示装置包括存储有子屏幕的有效使用时长与亮度衰减值的映射关系的存储器；该计算机可读程序被该处理器执行时还实现：
统计该至少两个共显子屏幕对应的至少两个有效使用时长；
基于该映射关系和该至少两个有效使用时长，确定与该至少两个共显子屏幕对应的至少两个亮度衰减值。
进一步地，该多个子屏幕的该映射关系及该初始亮度值分别相同。
进一步地，该计算机可读程序被该处理器执行时还实现：
基于该至少两个亮度衰减值确定一加权平均亮度衰减值，该加权平均亮度衰减值为该多个亮度衰减值的加权平均值；
基于该加权平均亮度衰减值和该至少两个亮度衰减值，确定该至少两个共显子屏幕对应的至少两个亮度补偿值。
进一步地，该至少两个亮度衰减值的权重相同。
进一步地，该亮度补偿值包括该至少两个共显子屏幕的驱动电压或者驱动电流的补偿值，该驱动电压或者驱动电流用于驱动该至少两个共显子屏幕进行亮度补偿；该计算机可读程序被该处理器执行时还实现：
根据该驱动电压或者驱动电流的补偿值分别调整该至少两个共显子屏幕的驱动电压或者驱动电流，对该至少两个共显子屏幕分别进行亮度补偿。
进一步地，该计算机可读程序被该处理器执行时还实现：
判断该可折叠显示装置是否处于共显状态，若是，则执行该检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值。
进一步地，该可折叠显示装置包括多个间隔设置的折弯部和非折弯部，该计算机可读程序被该处理器执行时还实现：
检测每个相邻的该折弯部和该非折弯部之间的夹角角度；
若至少一个该夹角角度在预设角度范围内，则判断该可折叠显示装置处于共显状态。
进一步地，该计算机可读程序被该处理器执行时还实现：
根据该至少两个亮度衰减值，判断该至少两个亮度衰减值中的最大值和最小值的差值的绝对值是否在大于预设阈值，；
若该至少两个亮度衰减值中的最大值和最小值的差值的绝对值大于预设阈值，则执行该根据该至少两个亮度补偿值对该至少两个共显子屏幕分别进行亮 度补偿。
进一步地，该计算机可读程序被该处理器执行时还实现：
定期获取多个子屏幕的有效使用时长。
本实施例中的装置与前述实施例中的方法是基于同一发明构思下的两个方面，在前面已经对方法实施过程作了详细的描述，所以本领域技术人员可根据前述描述清楚地了解本实施例中的装置的实施过程，为了说明书的简洁，在此就不再赘述。
通过以上的实施方式的描述可知，本领域的技术人员可以清楚地了解到本发明可借助软件加必需的通用硬件平台的方式来实现。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来。
一些实施例还提供了一种计算机可读存储介质，如ROM/RAM、磁碟、光盘等，其上存储有计算机可读程序，计算机可读程序被处理器执行时实现上述的方法。
上文提出的亮度补偿方法、可折叠显示装置及存储介质，通过检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，确定至少两个亮度补偿值，根据至少两个亮度补偿值对至少两个共显子屏幕分别进行亮度补偿，以使至少两个共显子屏幕之间的亮度差异位于预设范围内，从而控制各子屏幕亮度的一致性，保证可折叠显示装置展开时亮度的均匀性。

Claims (24)

  1. 一种亮度补偿方法，应用于包括多个子屏幕的可折叠显示装置，所述多个子屏幕分别具有初始使用时的初始亮度值；其特征在于，所述方法包括：
    检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，所述至少两个共显子屏幕共同构成同一显示界面；
    基于所述至少两个亮度衰减值确定与所述至少两个共显子屏幕对应的至少两个亮度补偿值；
    根据所述至少两个亮度补偿值，对所述至少两个共显子屏幕分别进行亮度补偿，以使所述至少两个共显子屏幕之间的亮度差异位于预设范围内。
  2. 根据权利要求1所述的方法，其特征在于，所述可折叠显示装置包括存储有子屏幕的有效使用时长与亮度衰减值的映射关系的存储器；所述检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值包括：
    统计所述至少两个共显子屏幕对应的至少两个有效使用时长；
    基于所述映射关系和所述至少两个有效使用时长，确定与所述至少两个共显子屏幕对应的至少两个亮度衰减值。
  3. 根据权利要求2所述的方法，其特征在于，所述有效使用时间与子屏幕的累计使用时间正相关，并且与子屏幕设定亮度正相关。
  4. 根据权利要求3所述的方法，其特征在于，所述有效使用时间与子屏幕的累计使用时间和该子屏幕设定亮度的平均值的乘积正比例线性相关。
  5. 根据权利要求2所述的方法，其特征在于，所述多个子屏幕的所述映射关系及所述初始亮度值分别相同。
  6. 根据权利要求1所述的方法，其特征在于，所述基于所述至少两个亮度衰减值确定与所述至少两个共显子屏幕对应的至少两个亮度补偿值包括：
    基于所述至少两个亮度衰减值确定一加权平均亮度衰减值，所述加权平均亮度衰减值为所述多个亮度衰减值的加权平均值；
    基于所述加权平均亮度衰减值和所述至少两个亮度衰减值，确定所述至少两个共显子屏幕对应的至少两个亮度补偿值。
  7. 根据权利要求6所述的方法，其特征在于，所述至少两个亮度衰减值的权重相同。
  8. 根据权利要求1所述的方法，其特征在于，所述亮度补偿值包括所述至少两个共显子屏幕的驱动电压或者驱动电流的补偿值，所述驱动电压或者驱动电流用于驱动所述至少两个共显子屏幕进行亮度补偿；所述对所述至少两个共显子屏幕分别进行亮度补偿包括：
    根据所述驱动电压或者驱动电流的补偿值分别调整所述至少两个共显子屏幕的驱动电压或者驱动电流，对所述至少两个共显子屏幕分别进行亮度补偿。
  9. 根据权利要求1所述的方法，其特征在于，还包括：
    判断所述可折叠显示装置是否处于共显状态，若是，则执行所述检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值。
  10. 根据权利要求9所述的方法，其特征在于，所述可折叠显示装置包括多个间隔设置的折弯部和非折弯部，所述判断所述可折叠显示装置是否处于共显状态包括：
    检测每个相邻的所述折弯部和所述非折弯部之间的夹角角度；
    若至少一个所述夹角角度在预设角度范围内，则判断所述可折叠显示装置处于共显状态。
  11. 根据权利要求1所述的方法，其特征在于，在对所述至少两个共显子屏幕分别进行亮度补偿之前还包括：
    根据所述至少两个亮度衰减值，判断所述至少两个亮度衰减值中的最大值和最小值的差值的绝对值是否在大于预设阈值；
    若所述至少两个亮度衰减值中的最大值和最小值的差值的绝对值大于预设阈值，则执行所述根据所述至少两个亮度补偿值对所述至少两个共显子屏幕分别进行亮度补偿。
  12. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    定期获取所述多个子屏幕的有效使用时长。
  13. 一种可折叠显示装置，其特征在于，包括：多个子屏幕、处理器和存储器，所述多个子屏幕分别具有初始使用时的初始亮度值，其中所述存储器中存储有计算机可读程序，所述计算机可读程序被配置成由所述处理器执行，所述计算机可读程序被所述处理器执行时实现：
    检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值，所述至少两个共显子屏幕共同构成同一显示界面；
    基于所述至少两个亮度衰减值确定与所述至少两个共显子屏幕对应的至少两个亮度补偿值；
    根据所述至少两个亮度补偿值，对所述至少两个共显子屏幕分别进行亮度补偿，以使所述至少两个共显子屏幕之间的亮度差异位于预设范围内。
  14. 根据权利要求13所述的装置，其特征在于，所述可折叠显示装置包括存储有子屏幕的有效使用时长与亮度衰减值的映射关系的存储器；所述计算机可读程序被所述处理器执行时还实现：
    统计所述至少两个共显子屏幕对应的至少两个有效使用时长；
    基于所述映射关系和所述至少两个有效使用时长，确定与所述至少两个共显子屏幕对应的至少两个亮度衰减值。
  15. 根据权利要求14所述的方法，其特征在于，所述有效使用时间与子屏幕的累计使用时间正相关，并且与子屏幕设定亮度正相关。
  16. 根据权利要求15所述的方法，其特征在于，所述有效使用时间与子屏幕的累计使用时间和子屏幕设定亮度的平均值的乘积正比例线性相关。
  17. 根据权利要求14所述的装置，其特征在于，所述多个子屏幕的所述映射关系及所述初始亮度值分别相同。
  18. 根据权利要求13所述的装置，其特征在于，所述计算机可读程序被所述处理器执行时还实现：
    基于所述至少两个亮度衰减值确定一加权平均亮度衰减值，所述加权平均亮度衰减值为所述多个亮度衰减值的加权平均值；
    基于所述加权平均亮度衰减值和所述至少两个亮度衰减值，确定所述至少两个共显子屏幕对应的至少两个亮度补偿值。
  19. 根据权利要求18所述的装置，其特征在于，所述至少两个亮度衰减值的权重相同。
  20. 根据权利要求13所述的装置，其特征在于，所述亮度补偿值包括所述至 少两个共显子屏幕的驱动电压或者驱动电流的补偿值，所述驱动电压或者驱动电流用于驱动所述至少两个共显子屏幕进行亮度补偿；所述计算机可读程序被所述处理器执行时还实现：
    根据所述驱动电压或者驱动电流的补偿值分别调整所述至少两个共显子屏幕的驱动电压或者驱动电流，对所述至少两个共显子屏幕分别进行亮度补偿。
  21. 根据权利要求11所述的装置，其特征在于，所述计算机可读程序被所述处理器执行时还实现：
    判断所述可折叠显示装置是否处于共显状态，若是，则执行所述检测处于共显状态下的至少两个共显子屏幕所对应的至少两个亮度衰减值。
  22. 根据权利要求21所述的装置，其特征在于，所述可折叠显示装置包括多个间隔设置的折弯部和非折弯部，所述计算机可读程序被所述处理器执行时还实现：
    检测每个相邻的所述折弯部和所述非折弯部之间的夹角角度；
    若至少一个所述夹角角度在预设角度范围内，则判断所述可折叠显示装置处于共显状态。
  23. 根据权利要求13所述的装置，其特征在于，所述计算机可读程序被所述处理器执行时还实现：
    根据所述至少两个亮度衰减值，判断所述至少两个亮度衰减值中的最大值和最小值的差值的绝对值是否在大于预设阈值；
    若所述至少两个亮度衰减值中的最大值和最小值的差值的绝对值大于预设阈值，则执行所述根据所述至少两个亮度补偿值对所述至少两个共显子屏幕分 别进行亮度补偿。
  24. 一种计算机可读存储介质，其上存储有计算机可读程序，其特征在于，所述计算机可读程序被处理器执行时实现如权利要求1-12任意一项所述的方法。
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