WO2019141116A1 - 一种屏幕校准的方法、装置及终端 - Google Patents

一种屏幕校准的方法、装置及终端 Download PDF

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Publication number
WO2019141116A1
WO2019141116A1 PCT/CN2019/070935 CN2019070935W WO2019141116A1 WO 2019141116 A1 WO2019141116 A1 WO 2019141116A1 CN 2019070935 W CN2019070935 W CN 2019070935W WO 2019141116 A1 WO2019141116 A1 WO 2019141116A1
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Prior art keywords
screen
color difference
working
color
brightness
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PCT/CN2019/070935
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English (en)
French (fr)
Inventor
王剑平
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中兴通讯股份有限公司
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Publication of WO2019141116A1 publication Critical patent/WO2019141116A1/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
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/024—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour registers, e.g. to control background, foreground, surface filling
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/022—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using memory planes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/048—Preventing or counteracting the effects of ageing using evaluation of the usage time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

Definitions

  • the present application relates to screen calibration techniques, such as a method, apparatus, and terminal for screen calibration.
  • the color coordinates of the terminal screen can be detected by the colorimeter instrument, and the color coordinates of the terminal screen can be adjusted according to the target color coordinates.
  • the terminal screen may have excellent drift phenomenon.
  • the color difference drift causes the color of the terminal screen to change, which affects the visual effect. This effect is especially serious for terminals with more than two screens.
  • a dual-screen mobile phone may cause a difference in the color of the two screens due to the difference in the color difference between the main and sub-screens, and the user experience is poor.
  • the embodiment of the present application provides a method, a device, and a terminal for screen calibration.
  • the embodiment of the present application provides a method for screen calibration, including: calculating a working brightness and a working time of the screen; determining, according to the working brightness and the working time of the screen, whether the color difference drift of the screen is greater than or equal to a color difference threshold, and The color coordinates of the screen are calibrated according to the determination result.
  • the embodiment of the present application further provides a device for screen calibration, comprising: a statistics module, configured to count the working brightness and working time of the screen; and a calibration module configured to determine the screen according to the working brightness and working time of the screen. Whether the color difference drift is greater than or equal to the color difference threshold, and the color coordinates of the screen are calibrated according to the determination result.
  • the embodiment of the present application further provides a terminal, including: a processor; a memory, configured to store the processor executable instructions; at least one screen; wherein the processor is configured to perform the following operations: counting the working brightness of the screen And working time length; determining, according to the working brightness and the working time of the screen, whether the color difference drift of the screen is greater than or equal to the color difference threshold, and calibrating the color coordinates of the screen according to the determination result.
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being configured to perform the method of screen calibration described above.
  • Figure 1 is a schematic diagram of color coordinates
  • FIG. 2 is a schematic diagram of chromatic aberration drift of a screen
  • FIG. 3 is a flowchart of a method for screen calibration according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a relationship between working brightness and working time length according to an embodiment of the present application.
  • Figure 5 is a schematic diagram of color coordinate characteristic data of the screen
  • FIG. 6 is a schematic diagram showing changes in color coordinates of the first screen
  • FIG. 8 is a flowchart of a method for screen calibration of an application example of the present application.
  • FIG. 9 is a schematic diagram of a device for screen calibration according to an embodiment of the present application.
  • a schematic diagram of color coordinates, a chromaticity coordinate is a coordinate of a color, also called a color system, and a different color corresponds to a point in the figure.
  • a color also called a color system
  • a different color corresponds to a point in the figure.
  • the point D65 in Figure 1 corresponds to white.
  • the center value of the color coordinates can be set to (0.30.0.32).
  • the color coordinate of the terminal screen refers to the specified position in the screen and the color coordinate of the specified color.
  • the color coordinate of the terminal screen is the color coordinate of the white point in the screen, but the embodiment of the present application Not limited to this, the specified position adopts other positions, and the designated color may adopt other colors, such as red, blue, green, etc., may also be implemented.
  • the chromatic aberration drift of the screen is the amount of change in the screen color coordinates, which is ⁇ x + ⁇ y.
  • the chromatic aberration drift of the screen gradually increases as the time of use increases.
  • the abscissa is the maximum brightness usage time of the white screen of the screen, the unit is hour, and the ordinate is the color difference drift ⁇ x+ ⁇ y.
  • the chromatic aberration drift of the screen is especially severe for dual-screen or multi-screen terminals.
  • the attenuation of the primary and secondary screens is different due to the different frequencies of the primary and secondary screens.
  • the chromatic aberration of the two screens is calibrated to within the color difference threshold.
  • the time of use as shown in Figure 2, for example, after more than 100 hours of use, the chromatic aberration of the screen may exceed the chromatic aberration threshold. Affect the user experience.
  • the embodiment of the present application provides a method for screen calibration, including steps 101 and 102.
  • step 101 the working brightness and working time of the screen are counted.
  • the working brightness and the working time of the statistical screen include: counting the working brightness and the corresponding working time of each time period of the screen.
  • the statistical working time is t 1 , t 2 ,..., t n , then l 1 , l 2 ,..., l n are respectively corresponding to t 1 , t 2 ,..., t n working time
  • n is the number of time segments, is an integer greater than or equal to 1
  • t 1 , t 2 , ..., t n is the working time corresponding to each time period.
  • the working brightness and corresponding working time of each time period can be recorded to the persist section of the terminal by means of files. After the switch is restarted, the data will be updated. When the factory settings are restored, the data will not be erased.
  • the chromatic aberration drift of the screen operating at maximum brightness is the most serious, and the same working time, as the working brightness is reduced, the chromatic aberration drift is also reduced.
  • the method may further include: acquiring a relationship between the working brightness and the working time of the screen and the color difference drift.
  • the relationship between the working brightness and the working time of the screen and the color difference drift may be: when the color difference drift is equal to the color difference threshold, the screen is adapted to the working brightness and the working time according to the multiple working brightness and the corresponding working time length. curve.
  • the setting screen works under maximum brightness (ie, brightness is 255), and the working time t max when the color difference drift is equal to the color difference threshold (for example, the color difference threshold is 3 ⁇ ) is 120 hours;
  • the screen works at mid brightness (ie, brightness is 128), and the working time t mid when the chromatic aberration drift is equal to the chromatic aberration threshold is 190 hours; by fitting the working brightness and the working time relationship curve, the chromatic aberration drift of the screen is obtained.
  • the relationship between the operating brightness and the working time when the color difference threshold is shown in Figure 4.
  • the working brightness and working time relationship curve can be a straight line, when more sets of working brightness and corresponding working time are selected. When testing, the fit will be more accurate in terms of working brightness and working time.
  • step 102 it is determined whether the chromatic aberration drift of the screen is greater than or equal to a chromatic aberration threshold according to the working brightness and the working time of the screen, and calibrating the color coordinates of the screen according to the determination result.
  • determining whether the color difference drift of the screen is greater than or equal to a color difference threshold according to the working brightness and the working time of the screen comprises: working brightness and corresponding work according to each time period of the screen. Time, the weighted average working brightness corresponding to the total working time and the total working time is obtained, and the weighted average working brightness and the total working time are compared with the preset relationship, and the weighted average working brightness and the total working length corresponding to the color difference drift are determined. Whether it is greater than or equal to the color difference threshold; wherein the preset relationship is a relationship between the working brightness and the working time of the screen and the color difference drift.
  • the weighted average working brightness L corresponding to the total working time is:
  • l 1 , l 2 , ..., l n are the working brightness corresponding to the working time of t 1 , t 2 , ..., t n , respectively.
  • the preset relationship curve is a working brightness and a working time relationship curve of the screen when the color difference drift is equal to the color difference threshold.
  • t L is the total working time of the screen when the color difference drift is equal to the color difference threshold under the weighted average working brightness L
  • L 1 and t 1 are the first working brightness and corresponding of the screen when the color difference drift is equal to the color difference threshold, respectively.
  • the first working duration, L 2 and t 2 are the second working brightness and the corresponding second working time of the screen when the chromatic aberration drift is equal to the chromatic aberration threshold, respectively.
  • the total working time t is greater than or equal to t L , ie
  • the color difference drift corresponding to the total working time t and the weighted average working brightness L is determined to be greater than or equal to the color difference threshold.
  • the relationship curve can be expressed by:
  • t 1 t max
  • t 2 t mid .
  • the screen works when the working brightness is L, and after the working time is t L , the color difference drift is greater than or equal to the color difference threshold, triggering a dynamic calibration.
  • the screen is at least one.
  • the plurality of screens may be: a plurality of discrete screens or a screen divided into a plurality of sections.
  • the embodiment of the present application is applicable not only to different physical display screens but also to different display areas of the same display screen.
  • OLED Organic Light-Emitting Diode
  • the edge displays a fixed time, motion parameters, etc., usually Always on Display, and other parts are used as normal user areas.
  • the working area will be longer than the normal area, and the color coordinate shift loss of the screen will be severely degraded with the increase of time.
  • the screen can be calibrated by the embodiment of the present application to reduce the same screen.
  • the color difference of the display area enhances the user experience of different display areas on the same screen.
  • the determining that the chromatic aberration drift of the screen is greater than or equal to the chromatic aberration threshold, and calibrating the color coordinates of the screen comprises: determining that the chromatic aberration drift of any one screen is greater than or equal to the chromatic aberration threshold, for each The color coordinates of the screens are calibrated; or the chromatic aberration drift of any one screen is determined to be greater than or equal to the color difference threshold, and the color coordinates of the screen with the chromatic aberration drift greater than or equal to the chromatic aberration threshold are calibrated.
  • the calibration object when there are multiple screens, the calibration object can be set, and in the case of triggering calibration, all screens are calibrated or only screens whose chromatic aberration drift is greater than or equal to the chromatic aberration threshold are calibrated.
  • the terminal before the step 101, before the terminal leaves the factory, the terminal is calibrated, including the steps of: entering the calibration mode, controlling the colorimetric instrument to detect the color coordinates of the screen; receiving the color coordinates of the screen, The color coordinates of the screen are compared with the target color coordinates; it is determined whether calibration is required; when calibration is required, the color coordinates of the screen are adjusted according to the target color coordinates.
  • the original color coordinate data of the screen is calibrated and recorded in the device memory.
  • the color coordinate characteristic data of the screen is measured by the colorimetric instrument at the factory, and is stored in the memory of the terminal at the time of shipment. As shown in Figure 5, the left side is the setting value associated with the color coordinate register, and the right side is the corresponding color coordinate (x, y).
  • r 1 , r 2 , ..., r 255 may be a color coordinate register or a set of color coordinate registers according to different screens.
  • the color coordinate register is also known as the Color Temperature Adjust (CTA) register.
  • CTA Color Temperature Adjust
  • the color coordinate register has 255 levels, and in other embodiments, the color coordinate register can have 64 levels, 32 levels, or other number of levels.
  • Each screen corresponds to a level of a color coordinate register, according to which the value of the corresponding color coordinate and the set value of the register can be obtained.
  • the default value set when the screen is shipped from the factory is generally the intermediate level.
  • the liquid crystal display (LCD) color coordinate register has 255 levels, and the factory default level is 128, which is r 128 .
  • the level r 1 corresponds to the coldest color tone
  • the level r 255 corresponds to the warmest color tone.
  • the color coordinate of the screen and the setting value of the register are adjusted correspondingly by adjusting the color coordinate register level corresponding to the color coordinate of the screen. For example, after the screen is calibrated by the method of the embodiment of the present application, the level is changed from r 100 to r 120 , and the value of the color coordinate and the set value of the register are changed.
  • the chromatic aberration of the two screens is already smaller than the chromatic aberration threshold, and the color coordinate register level for the first screen.
  • the setting value is r 100 and the corresponding color coordinates are For the second screen, the color coordinate register level setting value is r 160 , and the corresponding color coordinate is
  • the color coordinates of the register setting corresponding to the drift are as shown in FIG. 6 . among them For the color coordinate shift of the x-axis of the first screen, The color coordinate drift of the y-axis of the first screen.
  • the color coordinates of the register setting corresponding to the drift are as shown in FIG. 7 .
  • ⁇ xl 2 is the color coordinate shift of the x-axis of the second screen
  • ⁇ yl 2 is the color coordinate shift of the y-axis of the second screen.
  • the calibration of the color coordinates of the screen can be divided into three ways.
  • this calibration method is applicable to the case where the terminal has one screen, and also applies to the case where the terminal has multiple screens, that is, the number of screens is greater than or equal to 1.
  • Performing the calibration in the manner may include: adjusting a color coordinate of the screen according to a drift amount of color coordinates of the screen to at least one of: a color difference from a target color coordinate is minimum; and a color difference from the target color coordinate is smaller than a color difference Threshold.
  • the amount of drift of the color coordinates of the screen is a known amount as described above. Take two screens as an example. For the color coordinate shift of the x-axis of the first screen, The color coordinate drift of the y-axis of the first screen; For the color coordinate shift of the x-axis of the second screen, The color coordinate drift of the y-axis of the second screen.
  • the end condition of the dynamic calibration is converted into two points (x 1 , y 1 ), (x 2 , y 2 ) and the target color coordinate of the judgment plane, respectively.
  • the distance is the smallest, that is, the chromatic aberration is the smallest, or the condition that the chromatic aberration is smaller than the chromatic aberration threshold.
  • the screen is calibrated to the same fixed target color coordinate, and the target color coordinate can be set to the color coordinate of the white point (0.30, 0.32).
  • priority can be set. For example, preferentially selecting a color coordinate that is the smallest color difference from the target color coordinate and the color difference between the target color coordinate and the target color coordinate is less than a color difference threshold, and if not, selecting a color coordinate corresponding to the color difference between the target color coordinate and the color difference threshold, if If there is still no, the corresponding color coordinate with the smallest color difference from the target color coordinate is selected.
  • This calibration method is applicable to the case where the terminal has multiple (at least two) screens, that is, the number of screens is greater than or equal to 2.
  • Performing the calibration in the manner may include: adjusting a color coordinate of the screen according to a drift amount of color coordinates of each screen to at least one of: a color difference of color coordinates between at least two screens; and at least two screens The color difference between the two is less than the color difference threshold.
  • the amount of drift of the color coordinates of the screen is a known amount as described above.
  • the color coordinate drift of the y-axis of the first screen For the color coordinate shift of the x-axis of the second screen, The color coordinate drift of the y-axis of the second screen.
  • the end condition of the dynamic calibration is converted into a condition that the distance between the two points (x 1 , y 1 ), (x 2 , y 2 ) of the judgment plane is the smallest, that is, the chromatic aberration is the smallest, or the chromatic aberration is smaller than the chromatic aberration threshold.
  • the end condition of the dynamic calibration is converted into the condition that the distance between the three points (x 1 , y 1 ), (x 2 , y 2 ), (x 3 , y 3 ) of the judgment plane is the smallest, that is, the chromatic aberration is the smallest, or the chromatic aberration is less than the chromatic aberration threshold. .
  • the second display screen (x 2 , y 2 ) takes a value ranging from a point that satisfies the condition that the color difference between the first display screen and the second display screen is less than the color difference threshold.
  • the second display value is r 160 or r 162 is substituted for calculation, ie or assumed with The above condition is satisfied, and the second screen r 160 and the third screen r 100 are recorded.
  • r 100 set to the first screen r 120 and the second screen r 160 and the third display, respectively, are set to the corresponding registers.
  • priority may be set, for example, preferentially selecting a color difference of color coordinates between the plurality of screens to be the smallest and a color difference between the plurality of screens is smaller than a color coordinate corresponding to a color difference threshold, if not, selecting The color difference between the plurality of screens is smaller than the color coordinate corresponding to the color difference threshold, and if it is still not, the color coordinate corresponding to the color difference of the color coordinates between the plurality of screens is selected to be the smallest.
  • This calibration method is applicable to the case where the terminal has multiple (at least two) screens, that is, the number of screens is greater than or equal to 2.
  • Performing the calibration in this manner may include: adjusting a color coordinate of the screen according to a drift amount of color coordinates of each screen to at least one of: a color difference between a color coordinate of the at least two screens and a target color coordinate is the smallest; The color difference between the color coordinates of the at least two screens and the target color coordinates is less than the color difference threshold; the color difference of the color coordinates between the at least two screens is the smallest; and the color difference between the at least two screens is less than the color difference threshold.
  • the method is a combination of the first mode and the second mode, and can be implemented by referring to the first mode and the second mode.
  • the priority can be set, for example, the color difference between the priority selection and the target color coordinate is the smallest and the target color coordinate is The color difference is smaller than the color coordinate corresponding to the color difference threshold. If not, the color difference between the target color coordinate and the target color coordinate is less than the color coordinate corresponding to the color difference threshold. If not, the color difference between the plurality of screens is selected to be the smallest. The color difference between the plurality of screens is smaller than the color coordinate corresponding to the color difference threshold. If not, the color difference between the plurality of screens is selected to be smaller than the color coordinate corresponding to the color difference threshold. If not, the plurality of screens are selected. The color difference between the color coordinates is the smallest corresponding color coordinate.
  • the method further comprises: updating the information of the adjusted color coordinate register level and storing the information in the color difference calibration file.
  • the information of the adjusted color coordinate register level may be updated to a new calibration file.
  • the new color difference calibration file can be stored in the persist partition. When the factory settings are restored, the data will not be erased.
  • the latest color difference calibration file is loaded each time the power is turned on, and the settings are loaded into the register.
  • the color coordinates of the screen can be automatically calibrated, and no external device such as a color analyzer is needed, which is simple and convenient, and improves the user experience.
  • the chromatic aberration of the two screens is calibrated to within the color difference threshold, with the time of use, For example, after more than 100 hours of use, the chromatic aberration of the screen may exceed the chromatic aberration threshold.
  • the main screen is used as the first screen and the secondary screen is used as the second screen, and the color difference threshold is 3 ⁇ .
  • the method of screen calibration of this application example includes steps 201 to 206.
  • step 201 according to the working mode of the terminal, the working brightness and the corresponding working time of each time period of each screen are counted.
  • step 202 the total working time of each screen and the weighted average working brightness corresponding to the total working time are calculated according to the working brightness and the corresponding working time of each time period of each screen.
  • l 1 , l 2 , ..., l n are the working brightness corresponding to the working time of t 1 , t 2 , ..., t n , respectively.
  • step 203 according to the relationship between the maximum brightness and the intermediate brightness and the color difference drift of the working time, the relationship between the working brightness and the working time of the screen and the color difference drift is obtained, where the working brightness corresponds to the weighted average working brightness, and the working time is long.
  • the total working time corresponds to the weighted average working brightness of the screen and the relationship between the total working time and the chromatic aberration drift.
  • the relationship between the maximum brightness and the intermediate brightness as a function of the chromatic aberration drift of the working time is a known chromatic aberration drift relationship, as shown in FIG.
  • step 204 it is judged whether the chromatic aberration drift of any one screen exceeds 3 ⁇ ; if the chromatic aberration of any one screen drifts more than 3 ⁇ , the next step is performed, if the chromatic aberration drift of any one screen does not exceed 3 ⁇ , the process returns to step 201.
  • the total working time t is greater than or equal to Determining, that the color difference drift corresponding to the total working time t and the weighted average working brightness L is greater than or equal to a color difference threshold;
  • t max is the working time when the screen works at the maximum brightness
  • the chromatic aberration drift exceeds 3 ⁇
  • t mid is the working time when the screen operates at the intermediate brightness and the chromatic aberration drift exceeds 3 ⁇ .
  • step 205 the color coordinate calibration of the screen is performed by adjusting the color coordinate register level corresponding to the color coordinate of the screen, so that the color coordinate chromatic aberration after the two screens are drifted is minimum or less than 3 ⁇ .
  • step 206 the information of the adjusted color coordinate register level is updated and stored in the color difference calibration file.
  • the new color difference calibration file can be stored in the persist partition. When the factory settings are restored, the data will not be erased. The latest color difference calibration file is loaded each time the power is turned on, and the settings are loaded into the register.
  • the embodiment of the present application further provides a device for screen calibration, which is configured to implement the foregoing embodiments and implementation manners, and details have been omitted for description.
  • the term "module” may implement a combination of at least one of software and hardware for a predetermined function.
  • the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • the embodiment of the present application provides a device for screen calibration, including a statistic module 31 and a calibration module 32.
  • the statistics module 31 is configured to count the working brightness and working time of the screen.
  • the calibration module 32 is configured to determine that the color difference drift of the screen is greater than or equal to the color difference threshold according to the working brightness and the working time of the screen, and calibrate the color coordinates of the screen.
  • the method further includes: an obtaining module configured to acquire a relationship between the working brightness and the working time of the screen and the color difference drift.
  • the acquiring module is configured to: when the chromatic aberration drift is equal to the chromatic aberration threshold, the screen compares the working brightness and the working time relationship curve according to the multiple working brightness and the corresponding working time.
  • the statistics module 31 is configured to: calculate the working brightness and the corresponding working time of each time period of the screen.
  • the calibration module 32 is configured to: according to the working brightness and the corresponding working time of each time period of the screen, obtain a weighted average working brightness corresponding to the total working time and the total working time, The weighted average working brightness and the total working time are compared with the preset relationship, and the color difference drift corresponding to the weighted average working brightness and the total working time is determined to be greater than or equal to the color difference threshold; wherein the preset relationship is the working brightness and work of the screen. The relationship between the duration and the chromatic aberration drift.
  • l 1 , l 2 , . . . , l n are the working brightness corresponding to the working time of t 1 , t 2 , . . . , t n , respectively, and n is an integer greater than or equal to 1.
  • the calibration module 32 is configured to determine the total working time t and the weighted average when the total working time t is greater than or equal to the weighted average working brightness L in the corresponding working time in the relationship curve.
  • the color difference drift corresponding to the working brightness L is greater than or equal to the color difference threshold.
  • the relationship curve is a relationship between the working brightness and the working time of the screen when the chromatic aberration drift is equal to the chromatic aberration threshold.
  • the calibration module 32 is configured to: according to the weighted average working brightness L, the total working time t is greater than or equal to The color difference drift corresponding to the total working time t and the weighted average working brightness L is determined to be greater than or equal to the color difference threshold.
  • L 1 and t 1 are the first working brightness and the corresponding first working time of the screen when the chromatic aberration drift is equal to the chromatic aberration threshold, respectively, and L 2 and t 2 are respectively when the chromatic aberration drift is equal to the chromatic aberration threshold.
  • the second working brightness and the corresponding second working time are the first working brightness and the corresponding first working time of the screen when the chromatic aberration drift is equal to the chromatic aberration threshold, respectively, and L 2 and t 2 are respectively when the chromatic aberration drift is equal to the chromatic aberration threshold.
  • the screen is at least one
  • the calibration module 32 is configured to: determine that the chromatic aberration drift of any one screen is greater than or equal to the chromatic aberration threshold, calibrate the color coordinates of each screen; or determine any one screen.
  • the color difference drift is greater than or equal to the color difference threshold, and the color coordinates of the screen whose color difference drift is greater than or equal to the color difference threshold are calibrated.
  • the calibration module 32 is configured to: adjust a color coordinate of the screen according to a drift amount of color coordinates of the screen to at least one of: a color difference from a target color coordinate is minimum; and a target color The color difference between the coordinates is less than the color difference threshold.
  • the calibration module 32 is configured to: adjust a color coordinate of the screen according to a drift amount of color coordinates of each screen to at least one of the following: The color difference between the color coordinates of the at least two screens and the target color coordinates is the smallest; the color difference between the color coordinates of the at least two screens and the target color coordinates is less than the color difference threshold; the color difference of the color coordinates between the at least two screens is the smallest The color difference between the at least two screens is less than the color difference threshold.
  • the calibration module 32 is configured to: adjust a color coordinate register level corresponding to the color coordinate of the screen; the device further includes: a recording module, configured to update the adjusted color coordinate register level information And stored in the color difference calibration file.
  • the color coordinates of the screen can be automatically calibrated, and no external device such as a color analyzer is needed, which is simple and convenient, and improves the user experience.
  • the embodiment of the present application further provides a terminal, including: a processor; a memory, configured to store the processor executable instructions; and at least one screen.
  • the processor is configured to: calculate a working brightness and a working time of the screen; and determine, according to the working brightness and working time of the screen, that the color difference drift of the screen is greater than or equal to a color difference threshold, The color coordinates of the screen are calibrated.
  • the processor is further configured to: determine, according to the working brightness and working time of the screen, that the color difference drift of the screen is greater than or equal to a color difference threshold, and the color coordinate of the screen Before the calibration, the relationship between the working brightness and the working time of the screen and the chromatic aberration drift is obtained.
  • the relationship between the working brightness and the working time length of the acquisition screen and the color difference drift includes: when the color difference drift is equal to the color difference threshold, the screen is obtained according to the multiple working brightness and the corresponding working time length.
  • Working brightness and working time relationship curve when the color difference drift is equal to the color difference threshold, the screen is obtained according to the multiple working brightness and the corresponding working time length.
  • the processor is configured to perform an operation of counting the operating brightness and corresponding working time of each time period of the screen.
  • the processor is configured to: perform a weighted average working brightness corresponding to the total working time and the total working time according to the working brightness and the corresponding working time of each time period of the screen, Comparing the weighted average working brightness and the total working time with the preset relationship, determining that the weighted average working brightness and the total working time corresponding to the color difference drift are greater than or equal to the color difference threshold;
  • the preset relationship is a relationship between the working brightness and the working time of the screen and the color difference drift.
  • n is an integer greater than or equal to 1; the weighted average working brightness L corresponding to the total working time is calculated,
  • l 1 , l 2 , . . . , l n are the working brightness corresponding to the working time of t 1 , t 2 , . . . , t n , respectively, and n is an integer greater than or equal to 1.
  • the processor is configured to perform the following operations: determining the total working time t and weighting when the total working time t is greater than or equal to the weighted average working brightness L in the corresponding working time in the relationship curve The color difference drift corresponding to the average working brightness L is greater than or equal to the color difference threshold; wherein the relationship curve is a working brightness and working time relationship curve of the screen when the color difference drift is equal to the color difference threshold.
  • the processor is configured to perform the following operations: according to the weighted average working brightness L, the total working time t is greater than or equal to Determining, the color difference drift corresponding to the total working time t and the weighted average working brightness L is greater than or equal to a color difference threshold; wherein L 1 and t 1 are respectively the first working brightness of the screen when the color difference drift is equal to the color difference threshold Corresponding first working hours, L 2 and t 2 are respectively the second working brightness and the corresponding second working time of the screen when the color difference drift is equal to the color difference threshold.
  • the processor is configured to: determine that the chromatic aberration drift of any one of the screens is greater than or equal to the chromatic aberration threshold, calibrate the color coordinates of each screen; or determine that the chromatic aberration drift of any one of the screens is greater than or equal to The color difference threshold is calibrated for the color coordinates of the screen whose color difference drift is greater than or equal to the color difference threshold.
  • the processor is configured to: adjust a color coordinate of the screen according to a drift amount of color coordinates of the screen to at least one of: a color difference from a target color coordinate is minimum; and a target The color difference between the color coordinates is less than the color difference threshold.
  • the processor is configured to perform an operation of: adjusting a color coordinate of the screen according to a drift amount of color coordinates of each screen to at least one of: color coordinates of the at least two screens The color difference of the target color coordinates is the smallest; the color difference between the color coordinates of the at least two screens and the target color coordinates is less than the color difference threshold; the color difference of the color coordinates between the at least two screens is the smallest; the at least two screens The color difference between the two is less than the color difference threshold.
  • the processor is further configured to: adjust a color coordinate register level corresponding to the color coordinate of the screen; update the information of the adjusted color coordinate register level, and store the information in the color difference calibration file.
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being set to perform the above screen calibration method.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • mobile hard disk a magnetic disk
  • optical disk a variety of media that can store program code.
  • modules or steps of the embodiments of the present application may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices. For example, they may be implemented in program code executable by a computing device such that they may be stored in a storage device for execution by a computing device and, in some instances, may be performed in a different order than that illustrated herein. Or the steps described, either separately as an integrated circuit module, or as a plurality of modules or steps in a single integrated circuit module. Thus, embodiments of the present application are not limited to any particular combination of hardware and software.

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Abstract

一种屏幕校准的方法、装置及终端，方法包括：统计屏幕的工作亮度和工作时长(101)；根据屏幕的工作亮度和工作时长，确定屏幕的色差漂移大于或等于色差阈值，对屏幕的色坐标进行校准(102)。

Description

一种屏幕校准的方法、装置及终端
本申请要求在2018年01月17日提交中国专利局、申请号为201810043403.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及屏幕校准技术，例如一种屏幕校准的方法、装置及终端。
背景技术
在终端出厂之前，通常需要对终端的屏幕进行校准。例如，可以通过色度仪器检测终端屏幕的色坐标，按照目标色坐标调整终端屏幕的色坐标。
但是，这种屏幕校准的方式是在终端出厂之前进行，而随着终端的使用，终端屏幕可能会出色差漂移现象，色差漂移使得终端屏幕的颜色发生了变化，影响视觉效果。这种影响对于具有两个以上屏幕的终端尤为严重，例如双屏手机，由于主副屏色差漂移程度不同，会导致两个屏幕颜色有所差别，用户体验较差。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供了一种屏幕校准的方法、装置及终端。
本申请实施例提供了一种屏幕校准的方法，包括：统计屏幕的工作亮度和工作时长；根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准。
本申请实施例还提供了一种屏幕校准的装置，包括：统计模块，设置为统计屏幕的工作亮度和工作时长；校准模块，设置为根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准。
本申请实施例还提供了一种终端，包括：处理器；存储器，设置为存储所述处理器可执行指令；至少一个屏幕；其中，处理器设置为执行以下操作：统 计所述屏幕的工作亮度和工作时长；根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准。
本申请实施例还提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令设置为执行上述屏幕校准的方法。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图说明
附图用来提供对本申请技术方案的进一步理解，并且构成说明书的一部分，与本申请的实施例一起用于解释本申请的技术方案，并不构成对本申请技术方案的限制。
图1为色坐标的示意图；
图2为屏幕的色差漂移的示意图；
图3为本申请实施例的屏幕校准的方法的流程图；
图4为本申请实施例的工作亮度和工作时长关系曲线示意图；
图5为屏幕的色坐标特性数据示意图；
图6为第一屏幕的色坐标变化示意图；
图7为第二屏幕的色坐标变化示意图；
图8为本申请应用实例的屏幕校准的方法的流程图；
图9为本申请实施例的屏幕校准的装置示意图。
具体实施方式
下文中将结合附图对本申请的实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
如图1所示，为色坐标的示意图，色坐标(chromaticity coordinate)，就是颜色的坐标，也叫表色系，不同的颜色对应图中的一个点。例如图1中D65这个点对应白色。对于白点，其色坐标的中心值可以设置为(0.30.0.32)。
终端屏幕的色坐标，是指屏幕中指定位置和指定颜色的色坐标，在本申请实施例中，如果没有特别说明，终端屏幕的色坐标为屏幕中点白色的色坐标，但本申请实施例不限于此，指定位置采用其他位置，指定颜色采用其他颜色，例如红色、蓝色、绿色等也可以实施本申请。
屏幕的色差漂移是屏幕色坐标的变化量，为Δx+Δy。对于终端来说，屏幕的色差漂移随着使用的时间增长而逐渐增大。如图2所示，横坐标为屏幕白色画面最大亮度使用时间，单位是小时，纵坐标为色差漂移Δx+Δy。
屏幕的色差漂移对于双屏或多屏终端的影响尤其严重。以双屏终端为例，由于主副屏的使用频率不同，主副屏的衰减漂移不同。即使是在生产线出厂的时候，将两个屏幕的色差校准到色差阈值以内，随着使用的时间，如图2所示，比如使用超过100小时后，屏幕的色差漂移有可能超过色差阈值，严重影响用户体验。
如图3所示，本申请实施例提供一种屏幕校准的方法，包括步骤101和步骤102。
在步骤101中，统计屏幕的工作亮度和工作时长。
在一实施例中，所述统计屏幕的工作亮度和工作时长包括：统计所述屏幕每个时间段的工作亮度和对应的工作时间。
例如，统计工作时间为t 1，t 2，...，t n，那么l 1，l 2，...，l n分别为t 1，t 2，...，t n工作时间所对应的工作亮度。n为时间段数，为大于或等于1的整数，t 1，t 2，...，t n为每个时间段对应的工作时间。可以通过文件的方式将每个时间段的工作亮度和对应的工作时间记录到终端的保持(persist)分区，开关机重启后数据会进行更新，恢复出厂设置时，数据不会擦除。
屏幕在最大亮度下工作的色差漂移最严重，同样的工作时长，随着工作亮度的减少色差漂移也减小。
在步骤101之前，所述方法还可以包括：获取屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
其中，所述屏幕的工作亮度和工作时长两者与色差漂移之间的关系可以是：屏幕在色差漂移等于色差阈值时，根据多组工作亮度和对应的工作时长拟合工作亮度和工作时长关系曲线。举例来说，设置屏幕工作在最大亮度(max brightness)(即亮度为255)下，进行测试，在色差漂移等于色差阈值(例如色 差阈值为3‰)时的工作时间t max为120小时；设置屏幕工作在中间亮度(mid brightness)(即亮度为128)下，在色差漂移等于色差阈值时的工作时间t mid为190小时；通过拟合工作亮度和工作时长关系曲线，得到屏幕在色差漂移等于色差阈值时的工作亮度和工作时长之间的关系曲线，如图4所示。
因为上述举例拟合了两组工作亮度和对应的工作时长(最大亮度和中间亮度)，所以工作亮度和工作时长关系曲线可以是一条直线，当选择更多组的工作亮度和对应的工作时长进行测试时，拟合得到工作亮度和工作时长关系曲线会更加精确。
在步骤102中，根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准。
在一实施例中，所述根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，包括：根据所述屏幕每个时间段的工作亮度和对应的工作时间，得到工作总时长以及工作总时长对应的加权平均工作亮度，将所述加权平均工作亮度和工作总时长与预设关系进行比较，确定所述加权平均工作亮度和工作总时长对应的色差漂移是否大于或等于色差阈值；其中，所述预设关系为屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
其中，工作总时长t为：t＝t 1+t 2+...+t n，其中t 1，t 2，...，t n为每个时间段对应的工作时间，n为大于或等于1的整数。
工作总时长对应的加权平均工作亮度L为：
Figure PCTCN2019070935-appb-000001
其中，l 1,l 2，...，l n分别为t 1，t 2，...，t n工作时间对应的工作亮度。
在工作总时长t大于或等于所述加权平均工作亮度L在预设关系曲线中对应的工作时长时，确定所述工作总时长t和加权平均工作亮度L对应的色差漂移大于或等于色差阈值；其中，所述预设关系曲线为所述屏幕在色差漂移等于色差阈值时的工作亮度和工作时长关系曲线。
当采用两组工作亮度和对应的工作时长拟合得到屏幕在色差漂移等于色差阈值时的工作亮度和工作时长关系曲线时，该关系曲线可以通过下式表示：
Figure PCTCN2019070935-appb-000002
其中，t L为加权平均工作亮度L下所述屏幕在色差漂移等于色差阈值时的工作总时长，L 1和t 1分别是所述屏幕在色差漂移等于色差阈值时的第一工作亮度和对应的第一工作时长，L 2和t 2分别是所述屏幕在色差漂移等于色差阈值时的第二工作亮度和对应的第二工作时长。
相应地，在工作总时长t大于或等于t L，即
Figure PCTCN2019070935-appb-000003
时，确定所述工作总时长t和加权平均工作亮度L对应的色差漂移大于或等于色差阈值。
参照图4，若第一工作亮度为最大亮度255，第二工作亮度为中间亮度128时，该关系曲线可以通过下式表示：
Figure PCTCN2019070935-appb-000004
也即
Figure PCTCN2019070935-appb-000005
本例中，t 1＝t max，t 2＝t mid。
也就是说，屏幕工作在工作亮度为L下，工作时长为t L后，色差漂移大于或等于色差阈值，触发一次动态校准。
在本申请实施例中，屏幕为至少一个。
所述多个屏幕可以为：多个分立的屏幕或者一块屏幕划分为多个部分。
也就是说，本申请实施例不仅适用于不同的多个物理显示屏幕，同样也适用于同一显示屏幕的不同显示区域。
对于同一块屏幕，尤其是目前常见的有机发光二极管(Organic Light-Emitting Diode，OLED)屏幕，配合各种功能的需求，可以划分为在不同显示区域显示，由于屏幕的不同区域色差漂移随着使用的时间增长而逐渐增大。
比如边缘显示固定的时间、运动参数等，通常为常显(Always on Display)，其他部分作为正常用户使用区域。常显的区域相比正常使用的区域，工作时间会更长，随着时间的不断增加，屏幕的常显区域色坐标漂移损耗严重，同样可以通过本申请实施例校准屏幕，减少同一个屏幕不同显示区域的色差，提升同一个屏幕不同显示区域的用户体验。
所述屏幕为至少一个时，所述确定所述屏幕的色差漂移大于或等于色差阈值，对所述屏幕的色坐标进行校准，包括：确定任意一个屏幕的色差漂移大于或等于色差阈值，对每个屏幕的色坐标进行校准；或者确定任意一个屏幕的色差漂移大于或等于色差阈值，对色差漂移大于或等于色差阈值的屏幕的色坐标 进行校准。
其中，在屏幕为多个时，可以设置校准对象，在触发校准的情况下，校准所有的屏幕还是只校准色差漂移大于或等于色差阈值的屏幕。
在一实施例中，步骤101之前，在终端出厂之前，对终端进行校准，包括如下步骤：进入校准模式，控制色度仪器检测所述屏幕的色坐标；接收所述屏幕的色坐标，将所述屏幕的色坐标与目标色坐标进行比对；判断是否需要进行校准；在需要校准时，根据目标色坐标，调整屏幕的色坐标。
校准完成后，对屏幕的原始色坐标数据进行标定，记录到设备存储器中。
屏幕的色坐标特性数据是出厂时通过色度仪器测量得到，出厂时保存在终端的存储器中。如图5所示，左边为色坐标寄存器相关的设置值，右边为对应的色坐标(x,y)。
其中，r 1,r 2,......,r 255根据不同的屏幕，可以是一个色坐标寄存器，也可能是一组色坐标寄存器。色坐标寄存器也称为色温调节(Color Temperature Adjust，CTA)寄存器。在本例中，色坐标寄存器具有255个等级，在其他实施例中，色坐标寄存器可以具有64个等级、32个等级或其他个数等级。每个屏幕对应一个色坐标寄存器的等级，根据该等级可以得到对应的色坐标的数值以及寄存器的设置值。屏幕出厂时设定的默认值一般是中间等级。例如，液晶显示器(Liquid Crystal Display，LCD)的色坐标寄存器具有255个等级，出厂默认等级为128，也即r 128。色坐标寄存器的255个等级中，等级r 1对应最冷色调，等级r 255对应最暖色调。在本申请实施例中，通过调整所述屏幕的色坐标对应的色坐标寄存器等级，相应地调整了所述屏幕的色坐标以及寄存器的设置值。例如，在所述屏幕经过本申请实施例的方法校准后，等级从r 100变为r 120，则可知其色坐标的数值以及寄存器的设置值发生了变化。
如图6和图7所示，以终端有两个屏幕为例，假定在出厂的时候通过色度仪器静态校准后，两个屏幕的色差已经小于色差阈值，对于第一屏幕的色坐标寄存器等级设定值为r 100，对应的色坐标为
Figure PCTCN2019070935-appb-000006
对于第二屏幕的色坐标寄存器等级设定值为r 160，对应的色坐标为
Figure PCTCN2019070935-appb-000007
在第一屏幕工作总时长t 1,平均亮度L 1后，寄存器设置对应漂移后的色坐标如图6所示。其中
Figure PCTCN2019070935-appb-000008
为第一屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000009
为第一屏幕y轴的色坐标漂移。
在第二显示屏工作总时长t 2,平均亮度L 2后，寄存器设置对应漂移后的色坐标如图7所示。其中Δxl 2为第二屏幕x轴的色坐标漂移，Δyl 2为第二屏幕y轴的色坐标漂移。
在本申请实施例中，对所述屏幕的色坐标进行校准可以分为三种方式。
第一方式：这种校准方式即适用于终端有一个屏幕，也适用于终端有多个屏幕的情况，即屏幕数大于或等于1。
该方式进行校准可包括：根据所述屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：与目标色坐标的色差最小；以及与目标色坐标之间的色差小于色差阈值。
其中，屏幕的色坐标的漂移量如上所述，为已知量。以两个屏幕为例，
Figure PCTCN2019070935-appb-000010
为第一屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000011
为第一屏幕y轴的色坐标漂移；
Figure PCTCN2019070935-appb-000012
为第二屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000013
为第二屏幕y轴的色坐标漂移。
其中，假定目标色坐标的色坐标值为(x 0,y 0)，动态校准的结束条件转化为判断平面两点(x 1,y 1)、(x 2,y 2)分别和目标色坐标的距离最小也即色差最小，或者满足色差小于色差阈值的条件。采用如下公式进行：
公式一：
Figure PCTCN2019070935-appb-000014
公式二：
Figure PCTCN2019070935-appb-000015
将漂移后的色坐标
Figure PCTCN2019070935-appb-000016
代入如上公式一进行计算，得到动态校准后新的色坐标值，假定
Figure PCTCN2019070935-appb-000017
满足上述条件，将第一屏幕r 120记录下来并设置到第一屏幕的寄存器中。
将漂移后的色坐标
Figure PCTCN2019070935-appb-000018
代入如上公式二进行计算，得到动态校准后新的色坐标值，假定
Figure PCTCN2019070935-appb-000019
满足上述条件，将第二屏幕r 150记录下来并设置到第二屏幕的寄存器中。
本实施例中，将屏幕向同一个固定的目标色坐标进行校准，该目标色坐标可以设置为白点的色坐标(0.30,0.32)。
在实际应用中，可以设置优先级。例如，优先选择与目标色坐标的色差最小且与目标色坐标之间的色差小于色差阈值对应的色坐标，若没有，则选择与目标色坐标之间的色差小于色差阈值对应的色坐标，若依旧没有，则选择与目标色坐标的色差最小的对应的色坐标。
第二方式：这种校准方式即适用于终端有多个(至少两个)屏幕的情况，即屏幕数大于或等于2。
该方式进行校准可包括：根据每个屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：至少两个屏幕之间的色坐标的色差最小；以及至少两个屏幕之间的色差小于色差阈值。
以两个屏幕为例，屏幕的色坐标的漂移量如上所述，为已知量。
Figure PCTCN2019070935-appb-000020
为第一屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000021
为第一屏幕y轴的色坐标漂移；
Figure PCTCN2019070935-appb-000022
为第二屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000023
为第二屏幕y轴的色坐标漂移。
动态校准的结束条件转化为判断平面两点(x 1,y 1)、(x 2,y 2)的距离最小也即色差最小，或者满足色差小于色差阈值的条件。采用如下公式进行：
Figure PCTCN2019070935-appb-000024
将漂移后的色坐标
Figure PCTCN2019070935-appb-000025
和
Figure PCTCN2019070935-appb-000026
代入如上公式进行计算，得到动态校准后新的色坐标值，假定
Figure PCTCN2019070935-appb-000027
和
Figure PCTCN2019070935-appb-000028
满足上述条件，将第一屏幕r 120和第二屏幕r 150记录下来，并分别设置到第一屏幕和第二屏幕的寄存器中。
以三个屏幕为例，
Figure PCTCN2019070935-appb-000029
为第一屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000030
为第一屏幕y轴的色坐标漂移；
Figure PCTCN2019070935-appb-000031
为第二屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000032
为第二屏幕y轴的色坐标漂移；
Figure PCTCN2019070935-appb-000033
为第二屏幕x轴的色坐标漂移，
Figure PCTCN2019070935-appb-000034
为第二屏幕y轴的色坐标漂移。
动态校准的结束条件转化为判断平面三点(x 1,y 1)、(x 2,y 2)、(x 3,y 3)的距离最小也即色差最小，或者满足色差小于色差阈值的条件。先采用如下公式进行得到两个屏幕之间最近的点：
Figure PCTCN2019070935-appb-000035
将漂移后的色坐标
Figure PCTCN2019070935-appb-000036
和
Figure PCTCN2019070935-appb-000037
代入如上公式进行计算，得到动态校准后新的色坐标值，假定
Figure PCTCN2019070935-appb-000038
和
Figure PCTCN2019070935-appb-000039
满足上述条件，将第一屏幕r 120和第二屏幕r 160记录下来，两个屏幕之间可能存在多个点满足色差小于色差阈值的条件，假设(第一屏幕r 120，第二屏幕r 160)和(第一屏幕r 122，第二屏幕r 162)。然后以第二显示屏幕和第三显示屏幕为对象进行查找计算，同样采用两个屏幕之间最近的点：
Figure PCTCN2019070935-appb-000040
将漂移后的色坐标
Figure PCTCN2019070935-appb-000041
和
Figure PCTCN2019070935-appb-000042
代入如上公式进行计算，得到动态校准后新的色坐标值。
其中，第二显示屏幕(x 2，y 2)取值范围为满足第一显示屏幕和第二显示屏幕之间的色差小于色差阈值的条件的点，比如此时，第二显示屏取值为r 160或r 162代入进行计算，即
Figure PCTCN2019070935-appb-000043
或
Figure PCTCN2019070935-appb-000044
假定
Figure PCTCN2019070935-appb-000045
和
Figure PCTCN2019070935-appb-000046
满足上述条件，将第二屏幕r 160和第三屏幕r 100记录下来。
并分别设置到第一屏幕r 120和第二屏幕r 160和第三显示屏的r 100设置到对应的寄存器中。
在实际应用中，可以设置优先级，例如，优先选择所述多个屏幕之间的色坐标的色差最小且所述多个屏幕之间的色差小于色差阈值对应的色坐标，若没有，则选择所述多个屏幕之间的色差小于色差阈值对应的色坐标，若依旧没有，则选择所述多个屏幕之间的色坐标的色差最小对应的色坐标。
第三方式：这种校准方式即适用于终端有多个(至少两个)屏幕的情况，即屏幕数大于或等于2。
该方式进行校准可包括：根据每个屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：所述至少两个屏幕的色坐标与目标色坐标的色差最小；所述至少两个屏幕的色坐标与目标色坐标之间的色差小于色差阈值；所述至少两个屏幕之间的色坐标的色差最小；以及所述至少两个屏幕之间的色差小于色差阈值。
本方式是第一方式和第二方式的结合，可参照方式一和方式二实施，在实际应用中，可以设置优先级，例如，优先选择与目标色坐标的色差最小且与目标色坐标之间的色差小于色差阈值对应的色坐标，若没有，则选择与目标色坐标之间的色差小于色差阈值对应的色坐标，若没有，则选择所述多个屏幕之间 的色坐标的色差最小且所述多个屏幕之间的色差小于色差阈值对应的色坐标，若没有，则选择所述多个屏幕之间的色差小于色差阈值对应的色坐标，若没有，则选择所述多个屏幕之间的色坐标的色差最小对应的色坐标。
在一实施例中，所述方法还包括：更新调整后的色坐标寄存器等级的信息，并存入色差校准文件中。
其中，可以是将调整后的色坐标寄存器等级的信息，例如寄存器设定值，更新到新的校准文件中。新的色差校准文件可以存放在persist分区，恢复出厂设置时，数据不会擦除。每次开机时会加载最新的色差校准文件，加载设置到寄存器中。
在本申请实施例中，当屏幕的色差漂移大于或等于色差阈值时，可以自动对屏幕的色坐标进行校准，无需色彩分析仪等外部设备，实现简单方便，提高了用户体验。
下面以一个应用实例进行说明。
以双屏终端为例，由于主副屏的使用频率不同，主副屏的衰减漂移不同，即使是在生产线出厂的时候，将两个屏幕的色差校准到色差阈值以内，随着使用的时间，比如使用超过100小时后，屏幕的色差有可能超过色差阈值。
本例中，将主屏作为第一屏幕，副屏作为第二屏幕，色差阈值为3‰。
如图8所示，本应用实例的屏幕校准的方法包括步骤201至步骤206。
在步骤201中，根据终端的工作模式，统计各个屏幕的每个时间段的工作亮度和对应的工作时间。
在步骤202中，根据各个屏幕的每个时间段的工作亮度和对应的工作时间，计算每个屏幕的工作总时长以及工作总时长对应的加权平均工作亮度。
其中，工作总时长对应的加权平均工作亮度L：
Figure PCTCN2019070935-appb-000047
其中，l 1,l 2，...，l n分别为t 1，t 2，...，t n工作时间对应的工作亮度。
在步骤203中，根据最大亮度和中间亮度随工作时长的色差漂移关系，获得屏幕的工作亮度和工作时长两者与色差漂移之间的关系，此处工作亮度对应于加权平均工作亮度，工作时长对应于工作总时长，也即获得屏幕的加权平均工作亮度和工作总时长与色差漂移的关系。
所述最大亮度和中间亮度随工作时长的色差漂移关系为已知的色差漂移关 系，如图4所示。
在步骤204中，判断任意一个屏幕的色差漂移是否超过3‰；如果任意一个屏幕的色差漂移超过3‰，执行下一步，如果任意一个屏幕的色差漂移没有超过3‰，返回执行步骤201。
其中，根据加权平均工作亮度L，在工作总时长t大于或等于
Figure PCTCN2019070935-appb-000048
时，确定所述工作总时长t和加权平均工作亮度L对应的色差漂移大于或等于色差阈值；
其中，t max为屏幕工作在最大亮度下，色差漂移超过3‰对应的工作时间，t mid为屏幕工作在中间亮度下，色差漂移超过3‰对应的工作时间。
在步骤205中，通过调整所述屏幕的色坐标对应的色坐标寄存器等级，对屏幕进行色坐标校准，使两个屏幕漂移后的色坐标色差最小或者小于3‰。
在步骤206中，更新调整后的色坐标寄存器等级的信息，并存入色差校准文件中。
可以是将调整后的色坐标寄存器等级的信息，例如寄存器设定值，更新到新的校准文件中。新的色差校准文件可以存放在persist分区，恢复出厂设置时，数据不会擦除。每次开机时会加载最新的色差校准文件，加载设置到寄存器中。
本申请实施例还提供一种屏幕校准的装置，该装置设置为实现上述实施例及实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和硬件中至少一种的组合。尽管以下实施例所描述的装置可以以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
如图9所示，本申请实施例提供一种屏幕校准的装置，包括统计模块31和校准模块32。
统计模块31，设置为统计屏幕的工作亮度和工作时长。
校准模块32，设置为根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移大于或等于色差阈值，对所述屏幕的色坐标进行校准。
在一实施例中，还包括：获取模块，设置为获取屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
在一实施例中，所述获取模块设置为：屏幕在色差漂移等于色差阈值时，根据多组工作亮度和对应的工作时长，拟合得到的工作亮度和工作时长关系曲 线。
在一实施例中，所述统计模块31，设置为：统计所述屏幕每个时间段的工作亮度和对应的工作时间。
在一实施例中，所述校准模块32，设置为：根据所述屏幕每个时间段的工作亮度和对应的工作时间，得到工作总时长以及工作总时长对应的加权平均工作亮度，将所述加权平均工作亮度和工作总时长与预设关系进行比较，确定所述加权平均工作亮度和工作总时长对应的色差漂移大于或等于色差阈值；其中，所述预设关系为屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
在一实施例中，所述校准模块32，设置为：计算工作总时长t，其中t＝t 1+t 2+...+t n，t 1，t 2，...，t n为每个时间段对应的工作时间，n为大于或等于1的整数；计算工作总时长对应的加权平均工作亮度L，
Figure PCTCN2019070935-appb-000049
其中，l 1,l 2，...，l n分别为t 1，t 2，...，t n工作时间对应的工作亮度，n为大于或等于1的整数。
在一实施例中，所述校准模块32，设置为：在工作总时长t大于或等于所述加权平均工作亮度L在关系曲线中对应的工作时长时，确定所述工作总时长t和加权平均工作亮度L对应的色差漂移大于或等于色差阈值。其中，所述关系曲线为所述屏幕在色差漂移等于色差阈值时的工作亮度和工作时长关系曲线。
在一实施例中，所述校准模块32，设置为：根据加权平均工作亮度L，在工作总时长t大于或等于
Figure PCTCN2019070935-appb-000050
时，确定所述工作总时长t和加权平均工作亮度L对应的色差漂移大于或等于色差阈值。
其中，L 1和t 1分别是所述屏幕在色差漂移等于色差阈值时的第一工作亮度和对应的第一工作时长，L 2和t 2分别是所述屏幕在色差漂移等于色差阈值时的第二工作亮度和对应的第二工作时长。
在一实施例中，所述屏幕为至少一个，所述校准模块32，设置为：确定任意一个屏幕的色差漂移大于或等于色差阈值，对每个屏幕的色坐标进行校准；或者确定任意一个屏幕的色差漂移大于或等于色差阈值，对色差漂移大于或等于色差阈值的屏幕的色坐标进行校准。
在一实施例中，所述校准模块32，设置为：根据所述屏幕的色坐标的漂移 量，调整所述屏幕的色坐标至如下至少之一：与目标色坐标的色差最小；与目标色坐标之间的色差小于色差阈值。
在一实施例中，所述屏幕为至少两个时，所述校准模块32，设置为：根据每个屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：所述至少两个屏幕的色坐标与目标色坐标的色差最小；所述至少两个屏幕的色坐标与目标色坐标之间的色差小于色差阈值；所述至少两个屏幕之间的色坐标的色差最小；所述至少两个屏幕之间的色差小于色差阈值。
在一实施例中，所述校准模块32，设置为：调整所述屏幕的色坐标对应的色坐标寄存器等级；所述装置还包括：记录模块，设置为更新调整后的色坐标寄存器等级的信息，并存入色差校准文件中。
在本申请实施例中，当屏幕的色差漂移大于或等于色差阈值时，可以自动对屏幕的色坐标进行校准，无需色彩分析仪等外部设备，实现简单方便，提高了用户体验。
本申请实施例还提供一种终端，包括：处理器；存储器，设置为存储所述处理器可执行指令；至少一个屏幕。其中，所述处理器设置为执行以下操作：统计所述屏幕的工作亮度和工作时长；根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移大于或等于色差阈值，对所述屏幕的色坐标进行校准。
在一实施例中，所述处理器还设置为执行以下操作：所述根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移大于或等于色差阈值，对所述屏幕的色坐标进行校准之前，获取屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
在一实施例中，所述获取屏幕的工作亮度和工作时长两者与色差漂移之间的关系包括：屏幕在色差漂移等于色差阈值时，根据多组工作亮度和对应的工作时长拟合得到的工作亮度和工作时长关系曲线。
在一实施例中，所述处理器设置为执行以下操作：统计所述屏幕每个时间段的工作亮度和对应的工作时间。
在一实施例中，所述处理器设置为执行以下操作：根据所述屏幕每个时间段的工作亮度和对应的工作时间，得到工作总时长以及工作总时长对应的加权平均工作亮度，将所述加权平均工作亮度和工作总时长与预设关系进行比较， 确定所述加权平均工作亮度和工作总时长对应的色差漂移大于或等于色差阈值；
其中，所述预设关系为屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
在一实施例中，所述处理器设置为执行以下操作：计算工作总时长t，其中t＝t 1+t 2+...+t n，t 1，t 2，...，t n为每个时间段对应的工作时间，n为大于或等于1的整数；计算工作总时长对应的加权平均工作亮度L，
Figure PCTCN2019070935-appb-000051
其中，l 1,l 2，...，l n分别为t 1，t 2，...，t n工作时间对应的工作亮度，n为大于或等于1的整数。
在一实施例中，所述处理器设置为执行以下操作：在工作总时长t大于或等于所述加权平均工作亮度L在关系曲线中对应的工作时长时，确定所述工作总时长t和加权平均工作亮度L对应的色差漂移大于或等于色差阈值；其中，所述关系曲线为所述屏幕在色差漂移等于色差阈值时的工作亮度和工作时长关系曲线。
在一实施例中，所述处理器设置为执行以下操作：根据加权平均工作亮度L，在工作总时长t大于或等于
Figure PCTCN2019070935-appb-000052
时，确定所述工作总时长t和加权平均工作亮度L对应的色差漂移大于或等于色差阈值；其中，L 1和t 1分别是所述屏幕在色差漂移等于色差阈值时的第一工作亮度和对应的第一工作时长，L 2和t 2分别是所述屏幕在色差漂移等于色差阈值时的第二工作亮度和对应的第二工作时长。
在一实施例中，所述处理器设置为执行以下操作：确定任意一个屏幕的色差漂移大于或等于色差阈值，对每个屏幕的色坐标进行校准；或者确定任意一个屏幕的色差漂移大于或等于色差阈值，对色差漂移大于或等于色差阈值的屏幕的色坐标进行校准。
在一实施例中，所述处理器设置为执行以下操作：根据所述屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：与目标色坐标的色差最小；与目标色坐标之间的色差小于色差阈值。
在一实施例中，所述处理器设置为执行以下操作：根据每个屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：所述至少两个屏幕的色坐 标与目标色坐标的色差最小；所述至少两个屏幕的色坐标与目标色坐标之间的色差小于色差阈值；所述至少两个屏幕之间的色坐标的色差最小；所述至少两个屏幕之间的色差小于色差阈值。
在一实施例中，所述处理器还设置为执行以下操作：调整所述屏幕的色坐标对应的色坐标寄存器等级；更新调整后的色坐标寄存器等级的信息，并存入色差校准文件中。
本申请实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令设置为执行上述屏幕校准的方法。
在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本领域的技术人员应该明白，上述的本申请实施例的模块或步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上。例如，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本申请实施例不限制于任何特定的硬件和软件结合。

Claims (26)

  1. 一种屏幕校准的方法，包括：
    统计屏幕的工作亮度和工作时长；
    根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准。
  2. 如权利要求1所述的方法，所述根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准之前，所述方法还包括：
    获取所述屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
  3. 如权利要求2所述的方法，其中，所述获取所述屏幕的工作亮度和工作时长两者与色差漂移之间的关系包括：
    所述屏幕在所述色差漂移等于所述色差阈值时，根据多组所述屏幕的工作亮度和与所述工作亮度对应的工作时长，拟合得到所述屏幕的工作亮度和所述屏幕的工作时长的关系曲线。
  4. 如权利要求1所述的方法，其中，所述统计屏幕的工作亮度和工作时长包括：
    统计所述屏幕在每个时间段的工作亮度和与所述每个时间段对应的工作时间。
  5. 如权利要求4所述的方法，其中，所述根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，包括：
    根据所述屏幕在每个时间段的工作亮度和与所述每个时间段对应的工作时间，得到工作总时长以及与所述工作总时长对应的加权平均工作亮度；将所述加权平均工作亮度和所述工作总时长两者与预设关系进行比较，确定与所述加权平均工作亮度和所述工作总时长两者对应的所述色差漂移是否大于或等于所述色差阈值；
    其中，所述预设关系为：所述屏幕的工作亮度和工作时长两者与所述色差漂移之间的关系。
  6. 如权利要求5所述的方法，其中，所述根据所述屏幕在每个时间段的工作亮度和与所述每个时间段对应的工作时间，得到工作总时长以及与所述工作总时长对应的加权平均工作亮度，包括：
    计算所述工作总时长t，其中t＝t 1+t 2+...+t n，t 1，t 2，...，t n为每个时间段对应 的工作时间，n为大于或等于1的整数；
    计算与所述工作总时长对应的加权平均工作亮度L，
    Figure PCTCN2019070935-appb-100001
    其中，l 1,l 2，...，l n分别为t 1，t 2...，t n工作时间所对应的工作亮度，n为大于或等于1的整数。
  7. 如权利要求6所述的方法，其中，所述将所述加权平均工作亮度和所述工作总时长两者与预设关系进行比较，确定与所述加权平均工作亮度和所述工作总时长两者对应的所述色差漂移是否大于或等于所述色差阈值，包括：
    在所述工作总时长t大于或等于所述加权平均工作亮度L在预设关系曲线中对应的工作时长时，确定所述工作总时长t和所述加权平均工作亮度L对应的所述色差漂移大于或等于所述色差阈值；
    其中，所述预设关系曲线为：所述屏幕在所述色差漂移等于所述色差阈值时的工作亮度和工作时长的关系曲线。
  8. 如权利要求6所述的方法，其中，所述将所述加权平均工作亮度和所述工作总时长两者与预设关系进行比较，确定与所述加权平均工作亮度和所述工作总时长两者对应的所述色差漂移是否大于或等于所述色差阈值，包括：
    根据所述加权平均工作亮度L，计算
    Figure PCTCN2019070935-appb-100002
    并在所述工作总时长t大于或等于
    Figure PCTCN2019070935-appb-100003
    时，确定与所述工作总时长t和所述加权平均工作亮度L两者对应的所述色差漂移大于或等于所述色差阈值；
    其中，L 1和t 1分别是所述屏幕在所述色差漂移等于所述色差阈值时的第一工作亮度和与所述第一工作亮度对应的第一工作时长，L 2和t 2分别是所述屏幕在所述色差漂移等于所述色差阈值时的第二工作亮度和与所述第二工作亮度对应的第二工作时长。
  9. 如权利要求1所述的方法，其中，所述屏幕的数量为至少一个，所述确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准，包括：
    响应于任意一个屏幕的色差漂移大于或等于色差阈值的确定结果，对每个屏幕的色坐标进行校准；或者
    响应于任意一个屏幕的色差漂移大于或等于色差阈值的确定结果，对色差 漂移大于或等于色差阈值的屏幕的色坐标进行校准。
  10. 如权利要求1所述的方法，其中，所述对所述屏幕的色坐标进行校准包括：根据所述屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：
    与目标色坐标的色差最小；
    与所述目标色坐标之间的色差小于所述色差阈值。
  11. 如权利要求1所述的方法，其中，所述屏幕包括至少两个屏幕时，所述对所述屏幕的色坐标进行校准包括：根据每个屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：
    所述至少两个屏幕的色坐标与目标色坐标的色差最小；
    所述至少两个屏幕的色坐标与所述目标色坐标之间的色差小于所述色差阈值；
    所述至少两个屏幕之间的色坐标的色差最小；
    所述至少两个屏幕之间的色差小于所述色差阈值。
  12. 如权利要求10或11所述的方法，其中，
    所述调整所述屏幕的色坐标包括：调整所述屏幕的色坐标对应的色坐标寄存器等级；
    所述方法还包括：更新调整后的所述色坐标寄存器等级的信息，并将所述调整后的所述色坐标寄存器等级的信息存入色差校准文件中。
  13. 一种屏幕校准的装置，包括：
    统计模块，设置为统计屏幕的工作亮度和工作时长；
    校准模块，设置为根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准。
  14. 如权利要求13所述的装置，还包括：
    获取模块，设置为获取所述屏幕的工作亮度和工作时长两者与色差漂移之间的关系。
  15. 如权利要求14所述的装置，其中，所述获取模块设置为：所述屏幕在所述色差漂移等于所述色差阈值时，根据多组所述屏幕的工作亮度和与所述工作亮度对应的工作时长，拟合得到所述屏幕的工作亮度和所述屏幕的工作时长 的关系曲线。
  16. 如权利要求13所述的方法，其中，所述统计模块，设置为：
    统计所述屏幕在每个时间段的工作亮度和与所述每个时间段对应的工作时间。
  17. 如权利要求16所述的装置，其中，所述校准模块，设置为：
    根据所述屏幕在每个时间段的工作亮度和与所述每个时间段对应的工作时间，得到工作总时长以及与所述工作总时长对应的加权平均工作亮度；将所述加权平均工作亮度和所述工作总时长两者与预设关系进行比较，确定与所述加权平均工作亮度和所述工作总时长两者对应的所述色差漂移是否大于或等于所述色差阈值；
    其中，所述预设关系为：所述屏幕的工作亮度和工作时长两者与所述色差漂移之间的关系。
  18. 如权利要求17所述的装置，其中，所述校准模块，设置为：
    计算所述工作总时长t，其中t＝t 1+t 2+...+t n，t 1，t 2，...，t n为每个时间段对应的工作时间，n为大于或等于1的整数；
    计算与所述工作总时长对应的加权平均工作亮度L，
    Figure PCTCN2019070935-appb-100004
    其中，l 1,l 2，...，l n分别为t 1，t 2,...，t n工作时间所对应的工作亮度，n为大于或等于1的整数。
  19. 如权利要求6所述的装置，其中，所述校准模块，设置为：
    在所述工作总时长t大于或等于所述加权平均工作亮度L在预设关系曲线中对应的工作时长时，确定与所述工作总时长t和所述加权平均工作亮度L两者对应的所述色差漂移大于或等于所述色差阈值；
    其中，所述关系曲线为：所述屏幕在所述色差漂移等于所述色差阈值时的工作亮度和工作时长的关系曲线。
  20. 如权利要求18所述的装置，其中，所述校准模块，设置为：
    根据所述加权平均工作亮度L，计算
    Figure PCTCN2019070935-appb-100005
    并在所述工作总时长t大于或等于
    Figure PCTCN2019070935-appb-100006
    时，确定与所述工作总时长t和所述加权平均工作亮度L两者对应的所述色差漂移大于或等于所述色差阈值；
    其中，L 1和t 1分别是所述屏幕在所述色差漂移等于所述色差阈值时的第一工作亮度和与所述第一工作亮度对应的第一工作时长，L 2和t 2分别是所述屏幕在所述色差漂移等于所述色差阈值时的第二工作亮度和与所述第二工作亮度对应的第二工作时长。
  21. 如权利要求19所述的装置，其中，所述屏幕为至少一个，所述校准模块，设置为：
    在确定任意一个屏幕的色差漂移大于或等于色差阈值时，对每个屏幕的色坐标进行校准；或者
    在确定任意一个屏幕的色差漂移大于或等于色差阈值时，对色差漂移大于或等于色差阈值的屏幕的色坐标进行校准。
  22. 如权利要求13所述的装置，其中，所述校准模块，设置为通过以下操作对所述屏幕的色坐标进行校准：根据所述屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：
    与目标色坐标的色差最小；
    与所述目标色坐标之间的色差小于所述色差阈值。
  23. 如权利要求13所述的装置，其中，所述屏幕包括至少两个屏幕时，所述校准模块，设置为通过以下操作对所述屏幕的色坐标进行校准：根据每个屏幕的色坐标的漂移量，调整所述屏幕的色坐标至如下至少之一：
    所述至少两个屏幕的色坐标与目标色坐标的色差最小；
    所述至少两个屏幕的色坐标与所述目标色坐标之间的色差小于所述色差阈值；
    所述至少两个屏幕之间的色坐标的色差最小；
    所述至少两个屏幕之间的色差小于所述色差阈值。
  24. 如权利要求22或23所述的装置，其中，
    所述校准模块，设置为：调整所述屏幕的色坐标对应的色坐标寄存器等级；
    所述装置还包括：记录模块，设置为更新调整后的色坐标寄存器等级的信息，并将所述调整后的所述色坐标寄存器等级的信息存入色差校准文件中。
  25. 一种终端，包括：
    处理器；
    存储器，设置为存储所述处理器可执行指令；
    至少一个屏幕；
    其中，所述处理器设置为执行以下操作：
    统计所述屏幕的工作亮度和工作时长；
    根据所述屏幕的工作亮度和工作时长，确定所述屏幕的色差漂移是否大于或等于色差阈值，并根据确定结果对所述屏幕的色坐标进行校准。
  26. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令设置为执行权利要求1-12任一项的屏幕校准的方法。
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