WO2021043143A1 - 一种显示屏老化补偿方法、电路系统、电子设备 - Google Patents

一种显示屏老化补偿方法、电路系统、电子设备 Download PDF

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Publication number
WO2021043143A1
WO2021043143A1 PCT/CN2020/112892 CN2020112892W WO2021043143A1 WO 2021043143 A1 WO2021043143 A1 WO 2021043143A1 CN 2020112892 W CN2020112892 W CN 2020112892W WO 2021043143 A1 WO2021043143 A1 WO 2021043143A1
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Prior art keywords
display
display area
display screen
primary color
screen
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PCT/CN2020/112892
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English (en)
French (fr)
Inventor
吴蕾
文锦松
张秀峰
艾金钦
张亦扬
刘海啸
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华为技术有限公司
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Priority to EP20861223.4A priority Critical patent/EP4016511A4/en
Priority to US17/640,587 priority patent/US11881168B2/en
Publication of WO2021043143A1 publication Critical patent/WO2021043143A1/zh

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Definitions

  • This application relates to the field of display technology, and in particular to a display screen aging compensation method, circuit system, and electronic equipment.
  • OLED Organic Light Emitting Diode
  • the blue pixels decay faster, causing the screen to appear yellowish.
  • the secondary screen that is folded to the back of the main screen has less usage time, the screen attenuation of the main screen and the secondary screen are different. Therefore, when the main screen and the secondary screen are displayed together, the main screen and the secondary screen are displayed together.
  • the degree of yellowishness is different, which makes it easy to produce differences in display effects that can be noticed by the user.
  • the embodiments of the present application provide a display screen aging compensation method, circuit system, and electronic equipment, which are used to compensate for the aging of the display screen to reduce display differences.
  • the first aspect of the embodiments of the present application provides an aging compensation method for a display screen.
  • the display screen includes at least one display area.
  • the above-mentioned method for compensating for aging of the display screen includes: firstly, obtaining the display data of each display area.
  • the display data includes the use time t of the display area, the maximum gray scale Lev_max of each primary color before the display data is obtained, and the average gray scale Lev of each primary color during the use time t.
  • the use time is the cumulative screen-on time in the display area after the display is turned on.
  • the attenuation ratio of each primary color in the display area is obtained based on the display data.
  • the aging compensation is performed on each display area.
  • the colors of the first display area of the main display screen, the second display area of the secondary display screen, and the third display area of the bending screen with different degrees of aging caused by different attenuation degrees are close to the same.
  • the bending screen and the main display in the folding display are close to the same.
  • the display data further includes the maximum brightness DBV_max of the display area before the display data is obtained, and the average brightness DBV of the display area during the use time t.
  • the display data further includes the maximum brightness DBV_max of the display area before the display data is obtained, and the average brightness DBV of the display area during the use time t.
  • obtaining the attenuation ratio of each primary color in the display area according to the display data includes: First, obtain the revised aging formula according to the display data:
  • coef is the attenuation ratio of each primary color in the display area
  • is the gamma value of the display screen
  • ⁇ , k, and ⁇ are constants.
  • the constants ⁇ , k, and ⁇ corresponding to each primary color are respectively obtained.
  • the attenuation ratio coef of each primary color in the display area is obtained according to the constants ⁇ , k, ⁇ corresponding to each primary color and the corrected aging formula.
  • the acquired display data of each display area in the folding screen such as the first display area of the main display, the second display area of the secondary display, and the third display area of the bending screen, can be aged through Test, combine the aging formula and aging model to obtain the attenuation ratio of each primary color in each display area.
  • the above method before performing aging compensation for each display area according to the attenuation ratio of each primary color of each display area, the above method further includes: firstly, during the sampling period P for acquiring the display data at least twice, respectively acquiring the display area Temperature value; each temperature value corresponds to the attenuation ratio of each primary color of the display area acquired in the same sampling period P. Then, in combination with the current temperature value of the display area, the attenuation ratio of the same primary color corresponding to different temperature values is weighted and averaged to obtain the attenuation ratio of each primary color in the display area after the temperature value is corrected. In this way, the above-mentioned attenuation ratio is corrected in combination with the temperature factor to improve the accuracy of the aging compensation.
  • the time interval of another sampling period adjacent to the collection temperature can be set to be larger. Therefore, the interval between two adjacent sampling periods used to collect temperature and display data is greater than or equal to the interval between two adjacent sampling periods only used to collect display data.
  • the display screen includes a first display area and at least one second display area.
  • the use time of the first display area is greater than the use time of the second display area.
  • the attenuation degree of the first display area is greater than the attenuation degree of the second display area.
  • performing aging compensation for each display area according to the attenuation ratio of each primary color of each display area includes: firstly, obtaining a gray scale of each primary color of the first display area from the gray level look-up table of the first display area.
  • the level value is used as the gray level input value L_x.
  • the gray-scale output value L_y corresponding to each gray-scale input value L_x is obtained to form the gray-scale look-up table of the second display area.
  • the first display area is driven to display according to the gray level input value L_x in the gray level look-up table of the first display area.
  • the gray level output value L_y matching the gray level input value L_x is obtained from the gray level look-up table in the second display area, and the second display area is driven for display according to the gray level output value L_y.
  • the respective gray scale sets of the secondary display screen and the bent screen are obtained, so that a gray scale value corresponding to each primary color of the main display screen can be Find the grayscale value corrected by the attenuation ratio in the respective grayscale sets of the secondary display and the bending screen, and output to DDIC to control the secondary display and the bending screen to display according to the grayscale values in the respective grayscale sets , So that the brightness and primary colors of the secondary display screen, the bending screen and the main display screen are close to the same.
  • the purpose of compensating for the aging of the first display area of the main display screen is achieved, so that the display effects of the display areas with different use times are the same, or approximately the same. .
  • the grayscale input value L_x of each primary color in the grayscale range of 0-255 in the first display area can be obtained by the above-mentioned first compensation formula, and the grayscale of the same primary color in the second display area Output value L_y.
  • the 0-255 gray-level output values L_y of each primary color can constitute a complete gray-level look-up table in the second display area.
  • coef1 is the attenuation ratio of each primary color in the first display area
  • coef2 is the attenuation ratio of each primary color in the second display area
  • r is the gamma value of the display screen
  • the at least one display area includes a first display area and at least one second display area.
  • performing aging compensation for each display area includes: first, obtaining the initial demura data in the demura look-up table.
  • the initial demura data includes multiple demura compensation areas, and a grayscale input value L_x corresponding to each demura compensation area.
  • the display area includes at least one demura compensation area.
  • the gray-scale output value L_y corresponding to each gray-scale input value L_x is obtained to form the gray-scale look-up table of the demura compensation area.
  • the display area is driven to display.
  • the attenuation ratio of each primary color in each display area that has been obtained it is fused with the initial demura data read from the DDIC terminal to find the grayscale lookup table for each demura compensation area in each display area.
  • the grayscale value in the display area is corrected so that the brightness and color actually displayed in the display area match its attenuation ratio, so that the aging of the display area can be compensated.
  • the first display area of the main display screen, the second display area of the secondary display screen, and the third display area of the bending screen each include at least one demura compensation area described above. Therefore, each display area can be further divided into a smaller area demura compensation area for aging compensation, which improves the accuracy of aging compensation.
  • the initial demura data further includes a demura compensation coefficient a and a demura offset b corresponding to each demura compensation area.
  • the grayscale input value L_x of each primary color in the grayscale range of 0-255 in the display area can be obtained through the above-mentioned first compensation formula, and the grayscale output value L_y of the same primary color in the display area.
  • the 0-255 grayscale output values L_y of each primary color in the display area can constitute a complete grayscale look-up table with attenuation ratio correction for the above-mentioned display area.
  • coef_d is the attenuation ratio of each primary color in the demura compensation area
  • the attenuation ratio of each primary color in the demura compensation area is the attenuation ratio of the same primary color in the display area where the demura compensation area is located.
  • the method for obtaining the average brightness value DBV of the display area includes: first, when obtaining the display data, obtain the current brightness value DBV_c of the display area.
  • the average brightness value DBV of the display area maintains the average brightness value DBV_aver obtained before the display data is obtained.
  • the unit of the use time t is hours, and the unit of the sampling period P is minutes. To achieve the purpose of obtaining the mean value DBV of the brightness of the display area.
  • the second aspect of the embodiments of the present application provides a circuit system.
  • the circuit system includes a display screen aging compensation circuit.
  • the display screen includes at least one display area.
  • the display screen aging compensation circuit is used to: obtain the display data of each display area.
  • the display data includes the use time t of the display area, the maximum gray scale Lev_max of each primary color before the display data is acquired, and the average gray scale Lev of each primary color during the use time t; the use time is the display area after the display is turned on Cumulative bright screen time.
  • the aging compensation is performed on each display area.
  • the aging compensation circuit has the same technical effect as the aging compensation method provided in the foregoing embodiment, and will not be repeated here.
  • the display data further includes the maximum brightness DBV_max of the display area before the display data is obtained, and the average brightness DBV of the display area during the use time t.
  • Obtain the attenuation ratio of each primary color in the display area according to the display data including:
  • coef is the attenuation ratio of each primary color in the display area
  • is the gamma value of the display screen
  • ⁇ , k, and ⁇ are constants.
  • the constants ⁇ , k, and ⁇ corresponding to each primary color are obtained respectively.
  • the attenuation ratio coef of each primary color in the display area is obtained.
  • the display screen aging compensation circuit obtains the technical effect of the attenuation of each primary color in the display area as described above, and will not be repeated here.
  • the display screen aging compensation circuit before performing aging compensation for each display area according to the attenuation ratio of each primary color of each display area, is also used to: obtain the display data separately during the sampling period P for obtaining display data at least twice.
  • the temperature value of the zone Each temperature value corresponds to the attenuation ratio of each primary color of the display area acquired in the same sampling period P.
  • the attenuation ratio of the same primary color corresponding to different temperature values is weighted and averaged in combination with the current temperature value of the display area to obtain the attenuation ratio of each primary color in the display area after the temperature value is corrected.
  • the technical effect of the display screen aging compensation circuit performing the above functions is the same as that described above, and will not be repeated here.
  • the display screen includes a first display area and a second display area.
  • the use time of the first display area is greater than the use time of the second display area.
  • Performing aging compensation for each display area according to the attenuation ratio of each primary color of each display area includes: obtaining a gray level value of each primary color of the first display area from the gray level look-up table of the first display area as the gray Level input value L_x, and obtain the gray level output value L_y corresponding to each gray level input value L_x to form the gray level lookup table of the second display area, so that the display driving circuit coupled to the display screen can call the gray level lookup Table (for example, the grayscale look-up table of the first display area and the second display area), and drive the display screen to display.
  • the technical effect of the display screen aging compensation circuit performing the above functions is the same as that described above, and will not be repeated here.
  • perform aging compensation for each display area according to the attenuation ratio of each primary color of each display area which specifically includes: obtaining the initial demura data in the demura look-up table, and obtaining the gray level corresponding to each gray level input value L_x
  • the output value L_y uses L_y to form the gray-scale look-up table of the demura compensation area, so that the display driving circuit coupled to the display screen calls the gray-scale look-up table and drives the display screen for display.
  • the initial demura data includes multiple demura compensation areas and a grayscale input value L_x corresponding to each demura compensation area; the display area includes at least one demura compensation area.
  • an electronic device which includes a display screen, a display screen aging compensation circuit, and a display drive circuit.
  • the display screen includes at least one display area.
  • the display screen aging compensation circuit is used for the display data of each display area.
  • the display data includes the use time t of the display area, the maximum gray scale Lev_max of each primary color before the display data is acquired, and the average gray scale Lev of each primary color during the use time t; the use time is the display area after the display is turned on Cumulative bright screen time. Obtain the attenuation ratio of each primary color in the display area according to the display data.
  • the aging compensation is performed on each display area.
  • the display driving circuit is coupled with the display screen.
  • the display screen aging compensation circuit is coupled with the display driving circuit.
  • the display data further includes the maximum brightness DBV_max of the display area before the display data is obtained, and the average brightness DBV of the display area during the use time t.
  • Obtain the attenuation ratio of each primary color in the display area according to the display data including:
  • coef is the attenuation ratio of each primary color in the display area
  • is the gamma value of the display screen
  • ⁇ , k, and ⁇ are constants.
  • the constants ⁇ , k, and ⁇ corresponding to each primary color are obtained respectively.
  • the attenuation ratio coef of each primary color in the display area is obtained.
  • the display screen aging compensation circuit in the electronic device obtains the technical effect of the attenuation of each primary color in the display area as described above, and will not be repeated here.
  • the display screen aging compensation circuit is also used to: obtain the display data separately during the sampling period P for obtaining display data at least twice.
  • the temperature value of the zone Each temperature value corresponds to the attenuation ratio of each primary color of the display area acquired in the same sampling period P.
  • the attenuation ratio of the same primary color corresponding to different temperature values is weighted and averaged in combination with the current temperature value of the display area to obtain the attenuation ratio of each primary color in the display area after the temperature value is corrected.
  • the technical effect of the display screen aging compensation circuit of the electronic device performing the above function is the same as that described above, and will not be repeated here.
  • the display screen includes a first display area and a second display area.
  • the use time of the first display area is greater than the use time of the second display area.
  • Performing aging compensation for each display area according to the attenuation ratio of each primary color of each display area includes: obtaining a gray level value of each primary color of the first display area from the gray level look-up table of the first display area as the gray And obtain the gray-level output value L_y corresponding to each gray-level input value L_x to form a gray-level look-up table in the second display area.
  • the technical effect of the display screen aging compensation circuit of the electronic device performing the above function is the same as that described above, and will not be repeated here.
  • the display driving circuit is specifically configured to call the grayscale look-up tables in the first display area and the second display area, and drive the display screen to display.
  • the display driving circuit is specifically configured to call the grayscale look-up tables in the first display area and the second display area, and drive the display screen to display.
  • perform aging compensation for each display area according to the attenuation ratio of each primary color of each display area which specifically includes: obtaining the initial demura data in the demura look-up table, and obtaining the gray level corresponding to each gray level input value L_x
  • the output value L_y uses L_y to form the gray level look-up table of the demura compensation area.
  • the initial demura data includes multiple demura compensation areas and a grayscale input value L_x corresponding to each demura compensation area; the display area includes at least one demura compensation area.
  • the display driving circuit is specifically used to call the gray level lookup table in the demura compensation area and drive the display screen to display.
  • the display driving circuit is specifically used to call the gray level lookup table in the demura compensation area and drive the display screen to display.
  • the brightness and color actually displayed in the display area of the display screen are matched with its attenuation ratio, so as to achieve the purpose of compensating for the aging of the display area.
  • the electronic device includes a system on chip, and at least a part of the display screen aging compensation circuit is provided in the system on chip. So as to achieve the purpose of simplifying the circuit structure.
  • the display screen includes a first display area and a second display area.
  • the use time of the first display area is greater than the use time of the second display area.
  • the display screen includes a main display screen and a secondary display screen located on one side of the main display screen.
  • the effective display area of the main display screen is the first display area of the display screen; the effective display area of the secondary display screen is the second display area of the display screen.
  • the display screen further includes a third display area.
  • the use time of the first display area is greater than the use time of the third display area.
  • the display screen also includes a curved screen located between the main display and the secondary display. The bent screen is used to bend and deform when the secondary display is bent to the back of the main display.
  • the effective display area of the curved screen is the third display area of the display screen.
  • the display screen is a three-fold, outward-folding folding screen.
  • the fourth aspect of the embodiments of the present application provides an electronic device.
  • the electronic device includes a memory and a processor.
  • a computer program that can run on the processor is stored in the memory, and any one of the methods described above is implemented when the processor executes the computer program.
  • the foregoing electronic device has the same technical effect as the aging compensation method of the display screen provided in the foregoing embodiment, and will not be repeated here.
  • a computer-readable medium which stores a computer program.
  • the computer program is executed by the processor, any one of the methods described above is implemented.
  • the computer-readable medium has the same technical effect as the aging compensation method of the display screen provided in the foregoing embodiment, and will not be repeated here.
  • FIG. 1a is a schematic structural diagram of an electronic device provided by some embodiments of this application.
  • Fig. 1b is a schematic diagram of a structure of the display screen in Fig. 1a;
  • FIG. 1c is a schematic diagram of the connection structure of the pixel circuit and the OLED device in the sub-pixel in FIG. 1a;
  • 2a is a schematic structural diagram of a display screen with multiple display areas provided by some embodiments of the application;
  • Fig. 2b is a schematic diagram of folding the display screen shown in Fig. 2a;
  • 3a is a schematic structural diagram of another display screen with multiple display areas provided by some embodiments of the application.
  • FIG. 3b is a schematic diagram of folding the display screen shown in FIG. 3a;
  • FIG. 4 is a flowchart of an aging compensation method for a display screen provided by some embodiments of the application.
  • FIG. 5 is a schematic diagram of a structure of a display aging compensation circuit provided by some embodiments of the application.
  • FIG. 6 is a flowchart of an implementation manner of S102 in FIG. 4;
  • FIG. 7 is a schematic diagram of an aging curve provided by some embodiments of the application.
  • FIG. 8 is a flowchart of another aging compensation method for a display screen provided by some embodiments of the application.
  • FIG. 9 is a schematic diagram of another aging curve provided by some embodiments of the application.
  • FIG. 10 is a schematic diagram of another structure of a display screen aging compensation circuit provided by some embodiments of the application.
  • FIG. 11 is a line diagram of the relationship between input gray levels and output gray levels provided by some embodiments of the application.
  • FIG. 12 is a schematic diagram of an aging compensation method for a display screen provided by some embodiments of the application.
  • FIG. 13 is a schematic diagram of another aging compensation method for a display screen provided by some embodiments of the application.
  • FIG. 14 is a schematic diagram of the arrangement of the demura compensation area provided by some embodiments of the application.
  • 01-Electronic equipment 10-display screen; 11-middle frame; 12-shell; 100-AA area; 101-non-display area; 20-DDIC; 21-sub-pixel; 201-pixel circuit; 110-display area; 120-main display screen; 121-secondary display screen; 122-bending screen; 30-display aging compensation circuit; 301-data statistics circuit; 302-attenuation ratio calculation circuit; 303-compensation circuit; 40-demura compensation area.
  • Coupled may be a direct electrical connection or an indirect electrical connection through an intermediate medium.
  • An embodiment of the present application provides an electronic device 01 as shown in FIG. 1a.
  • the electronic device 01 includes, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA), an in-vehicle computer, and the like.
  • PDA personal digital assistant
  • the embodiment of the present application does not impose special restrictions on the specific form of the above-mentioned electronic device 01.
  • the following description takes the electronic device 01 as a mobile phone as an example.
  • the structure of the above electronic device 01 as shown in FIG. 1a, mainly includes a display screen 10, a middle frame 11 and a housing 12.
  • the display screen 10 and the middle frame 11 are arranged in the housing 12.
  • FIG. 1a is an example in which the electronic device 01 includes a display screen 10 as an example.
  • the electronic device 01 includes two display screens 10.
  • the above-mentioned two display screens 10 may be respectively arranged on both sides of the middle frame 11. Thus, both the front and back of the electronic device can be displayed.
  • the display screen 10 includes an active display area (AA) 100 and a non-display area 101 located around the AA area 100.
  • the AA area 100 includes a plurality of sub pixels 21.
  • the above-mentioned multiple sub-pixels 21 in the present application are described by taking the arrangement of a matrix as an example.
  • the sub-pixels 21 arranged in a row along the horizontal direction X in FIG. 1b are called sub-pixels in the same row, and the sub-pixels 21 arranged in a row along the vertical direction Y are called sub-pixels in the same row. .
  • the above-mentioned display screen 10 is an OLED display screen.
  • the OLED display can realize self-luminescence.
  • the sub-pixel 21 in the AA area 100 is provided with an OLED device as shown in FIG. 1c and a pixel circuit 201 for driving the OLED device to emit light.
  • the above-mentioned electronic device may include a display driving circuit for driving the display screen 10 to display, and the display driving circuit may be coupled to the display screen 10.
  • the display driver circuit may be a display driver integrated circuit (DDIC).
  • the DDIC 20 is disposed in the non-display area 101 of the display screen 10.
  • the pixel circuits 201 in the sub-pixels 21 in the same column are coupled to the DDIC 20 through the same data line (DL).
  • the above-mentioned DDIC 20 can also be set independently of the display screen 10.
  • the aforementioned electronic device 01 further includes a printed circuit board (printed circuit board, PCB) and a system on chip (SoC) installed on the PCB.
  • An application processor (application processor, AP) may be provided in the SoC.
  • the DDIC 20 in FIG. 1b is coupled to the SoC through a flexible printed circuit (FPC).
  • the display data output by the SoC can be converted into a data voltage Vdata after passing through the DDIC 20 and transmitted to the pixel circuit 201 of each sub-pixel 21 coupled to each data line DL.
  • each pixel circuit 201 generates a driving current I matching the data voltage Vdata through the data voltage Vdata on the data line DL to drive the OLED device in the sub-pixel 21 to emit light.
  • the pixel circuit 201, the OLED device, and the data line DL in each sub-pixel 21 in the display screen 10 can be fabricated on a base substrate.
  • the base substrate can be made of a flexible resin material.
  • the OLED display can be used as a folding display.
  • the base substrate in the above-mentioned OLED display screen may also be made of a material with a relatively hard texture, such as glass.
  • the aforementioned OLED display is a hard display.
  • the above-mentioned display screen 10 may include a plurality of display areas.
  • the display screen 10 includes two display areas 110 as shown in FIG. 2a.
  • the use time t of different display areas 110 may be different. It should be noted that the use time t in the embodiment of the present application refers to the cumulative screen-on (ie, screen light-emitting) time of the display area 110 after the display screen 10 is turned on to the current moment.
  • the above-mentioned display screen may include a main display screen 120 and a secondary display screen 121 located on one side of the main display screen 120.
  • the secondary display screen 121 is bent to the back of the main display screen 120 along the arrow direction in FIG. 2b, the display surface of the secondary display screen 121 is far away from the main display screen 120.
  • the display screen 10 having the above-mentioned primary display screen 120 and the secondary display screen 121 is folded outwardly. That is, after the main display screen 120 and the auxiliary display screen 121 are folded, the display surfaces of the main display screen 120 and the auxiliary display screen 121 are both located outside.
  • the AA area of the main display screen 120 is the first display area 110a of the display screen 10.
  • the AA area of the secondary display screen 121 is the second display area 110b of the display screen 10.
  • the display screen 10 includes two display areas, namely a first display area 110a and a second display area 110b.
  • the display screen 10 is in a folded state, and only the main display screen 120 is used for screen display, while the secondary display screen 121 is in the off-screen state.
  • the main display 120 and the sub display 121 of the display screen 10 can be unfolded, and the main display 120 and the sub display 121 are both displayed to obtain a larger display.
  • the display area. Therefore, the use time t1 of the first display area 110a of the main display screen 120 is greater than the use time t2 of the second display area 110b of the secondary display screen 121.
  • the display screen 110 includes three display areas with different usage times.
  • the above-mentioned display screen 10 further includes a main display screen 120, a secondary display screen 121, and a bending screen 122 located between the main display screen 120 and the secondary display screen 121 as shown in FIG. 3b.
  • the bending screen 122 is used for bending deformation when the secondary display screen 121 is bent to the back of the main display screen 120 in the arrow direction of FIG. 3b.
  • the display screen 10 having the above-mentioned main display screen 120, the sub display screen 121, and the bending screen 122 is folded outwardly. That is, after the main display screen 120 and the auxiliary display screen 121 are folded, the display surfaces of the main display screen 120, the auxiliary display screen 121, and the bending screen 122 are all located outside.
  • the AA area of the main display screen 120 is the first display area 110a of the display screen 10.
  • the AA area of the secondary display screen 121 is the second display area 110 b of the display screen 10, and the AA area of the bending screen 122 is the third display area 110 c of the display screen 10.
  • the display screen 10 includes three display areas, namely a first display area 110a, a second display area 110b, and a third display area 110c.
  • the main display screen 120 When the display screen 10 is in the folded state, the main display screen 120 mainly performs screen display.
  • the sub display 121 may be displayed when the user takes a self-portrait.
  • the main display screen 120, the auxiliary display screen 121, and the bending screen 122 all display. Therefore, the use time t1 of the first display area 110a of the main display screen 120 is greater than the use time t2 of the second display area 110b of the secondary display screen 121, and the use time t2 of the second display area 110b is greater than the use time t2 of the bending screen 122.
  • the use time t3 of the third display area 110c The use time t3 of the third display area 110c.
  • the folding screen 10 when the display screen 10 is used as a folding screen.
  • the folding screen also has an inward fold, an inward and outward fold, and the number of areas that can be folded in the display screen 10 is not limited to the above two, but the display area 110 is set in the same manner as above. I will not repeat them one by one here.
  • the position of the boundary line between the first display area 110a, the second display area 110b, and the third display area 110c can be configured as required. This application is not limited, as long as it can be ensured that the boundary line of the foregoing area is located It suffices between two adjacent columns (or two rows) of sub-pixels 21.
  • the embodiment of the present application provides an aging compensation method for the display screen 10.
  • the aging compensation method is shown in Figure 4, S101-S103.
  • some embodiments of the present application provide a circuit system.
  • the circuit system includes a display screen aging compensation circuit 30 as shown in FIG. 5.
  • the display screen aging compensation circuit 30 can be used to execute the above S101 to S103.
  • the above-mentioned electronic device 01 may include the above-mentioned display screen aging compensation circuit 30.
  • S101 Obtain display data of each display area 110.
  • the period of time during which the display data of each display area 110 is acquired each time may be referred to as the sampling period P.
  • the display data may include the use time t of the display area 110, before the display data is obtained, that is, before the current sampling period P, the maximum value of each primary color gray scale Lev1_max, and within the use time t , The gray-scale average value of each primary color Lev1.
  • the above-mentioned display data may further include the maximum value DBV1_max of the brightness of the display area 110 before obtaining the above-mentioned display data, and the average value of the brightness DBV of the display area 110 during the use time t.
  • the above-mentioned primary colors may be red (red, R), green (green, G), and blue (blue, B), respectively.
  • the primary colors can be cyan (cyan, C), magenta (Magenta, M), and yellow (yellow, Y).
  • more than three primary colors may be included.
  • two primary colors of grass green and emerald are introduced according to the characteristic that the human eye is most sensitive to green. This application does not limit this.
  • the average gray scale Lev1 and the maximum gray scale Lev1_max of each primary color in the display data mean that the display data of one display area 110 includes the average gray scale Lev1 and the maximum gray scale Lev1_max of each primary color.
  • the display screen aging compensation circuit 30 may include a data statistics circuit 301 as shown in FIG. 5.
  • the data statistics circuit 301 is used to obtain the display data of each display area 110 in each sampling period P.
  • Each display area 110 has a set of the above-mentioned display data.
  • the display screen aging compensation circuit 30 needs to obtain the display data of the first display area 110a of the main display screen 120 and the display data of the sub display screen 121 respectively. Display data of the second display area 110b.
  • the display screen aging compensation circuit 30 needs to obtain the first display of the main display screen 120 separately.
  • the display data of the area 110a and the display data of the second display area 110b of the secondary display 121 it is also necessary to obtain the display data of the third display area 110c of the bending screen 122.
  • the use time t can be known from the above, and refers to the cumulative screen-on (ie, screen light-emitting) time of the first display area 110a of the display screen 120 after the display screen 10 is turned on to the current moment.
  • the embodiment of the present application does not limit the duration of the sampling period P, for example, it may be 1 minute, or 30 seconds, or 2 minutes.
  • the accumulated light-on time of the second display area 110b of the secondary display screen 121 is zero.
  • the statistical method of the use time t3 of the third display area 110c of the curved screen 122 is the same as that described above, and will not be repeated here.
  • the method for obtaining the average brightness DBV of the display area for example, the first display area 110a of the main display screen 120 includes:
  • the current brightness value DBV_c of the first display area 110a is acquired.
  • the brightness average value DBV of the first display area 110a of the main display screen 120 maintains the brightness average value DBV_aver obtained before the display data is obtained.
  • the average brightness value DBV of the first display area 110a is obtained according to the following formula.
  • the foregoing description takes the first display area 110a of the main display screen 120 as an example to describe the method for obtaining the average brightness value DBV of the display area.
  • the method for obtaining the average brightness DBV of the second display area 110b of the secondary display screen 121 and the third display area 110c of the bending screen 122 is the same as described above, and will not be repeated here.
  • the gray-level average value Lev of each primary color of the first display area 110a of the main display 120 means to obtain the red gray-level average Lev_R and the green gray-level value of the first display area 110a, respectively.
  • the red gray level average value Lev_R of the first display area 110a of the main display screen 120 maintains the gray level average value Lev_aver obtained before the current sampling period.
  • Lev_R (t*60*Lev_aver+T*Lev_R_c)/(t*60+T)
  • the red gray scale average Lev_R, the green gray scale average Lev_G, and the blue gray scale average Lev_B of the second display area 110b of the secondary display screen 121, and the red gray scale average Lev_R, green gray scale averages of the third display area 110c of the bending screen 122 The method of obtaining the average gray level Lev_G and the average blue gray level Lev_B is the same as described above, and will not be repeated here.
  • the way to obtain the attenuation ratio can be based on the empirical value, using the above display data, such as the cumulative display time t, etc. to obtain the attenuation ratio.
  • the red sub-pixels on the display screen have the maximum gray level after 100 hours of cumulative light emission.
  • the average gray scale attenuation is 5%
  • the red attenuation ratio is 5%.
  • the above empirical value can be obtained through statistics of the product, or through an aging experiment.
  • the attenuation ratio is obtained by combining the aging model of each primary color with the display data.
  • the above-mentioned aging model can be described by an aging function or an aging curve.
  • the display screen aging compensation circuit 30 is also used to obtain the attenuation ratio of each primary color in the display area according to the aging model and display data of each primary color in the display area.
  • the display screen aging compensation circuit 30 may further include an attenuation ratio calculation circuit 302 coupled to the data statistics circuit 301.
  • the attenuation ratio calculation circuit 302 is used to obtain the attenuation ratio of each primary color in the display area 110 according to the aging curve of each primary color in the display area 110 and the display data.
  • the display screen aging compensation circuit 30 when the display screen aging compensation circuit 30 executes the foregoing S102, it may specifically include executing S201 to S203 as shown in FIG. 6.
  • the formula for stretched exponential decay (SED): Make corrections, and obtain the above formula (1) according to the display data obtained in S101.
  • coef is the attenuation ratio of each primary color in the display area; ⁇ is the gamma value of the display screen; ⁇ , k, and ⁇ are constants. ⁇ is a parameter related to the lifetime and initial brightness of the OLED device in the display screen. ⁇ is a parameter related to the material and manufacturing process of the OLED device. K is the aging acceleration factor of the OLED device.
  • L is the brightness value of the display area 110 in the current sampling period P;
  • L 0 is the initial brightness of the display area 110.
  • the initial brightness L 0 may be the brightness value of the display area 110 during the first sampling period P after the display screen 10 is turned on.
  • the coefficients a0 and a1 in the linear model are related to the three constants ⁇ , k, and ⁇ in the above formula (1) as constants.
  • the least squares method can be used to obtain the coefficients a0 and a1 in the linear model, so as to further obtain the constants ⁇ , k, and ⁇ .
  • a set of known data points (Xi, Yi) according to the aging test.
  • i a positive integer.
  • the foregoing known data points can be obtained by taking the first display area 110a of the main display screen 120 as an example, and performing an aging test on the first display area 110a.
  • a plurality of specific grayscale pictures are displayed, such as red, green, blue, and white pictures, and each primary color has four medium grays of 255, 216, 164, and 128.
  • the above-mentioned multiple known data points (Xi, Yi) can be roughly distributed as a straight line, which is called a fitted straight line.
  • the fitted straight line does not pass through all known data points (Xi, Yi).
  • the curve ie, the aging curve of each primary color in the display area 110
  • the curve with the smallest sum of squares of the distance from the fitted straight line is fitted by the principle of least squares.
  • S203 Obtain the display area, for example, the attenuation ratio of each primary color in the primary colors of the first display area 110a, according to the constant ⁇ , k, ⁇ corresponding to each primary color and the modified aging formula, that is, the above formula (1), for example The red attenuation ratio coef1_R, the green attenuation ratio coef1_G, and the blue attenuation ratio coef1_B.
  • the attenuation ratio of each primary color in the second display area 110b of the secondary display screen 121 can be obtained, for example, the red attenuation ratio coef2_R, the green attenuation ratio coef2_G, and the blue attenuation ratio coef2_B.
  • the attenuation ratio of each primary color in the third display area 110c of the bent screen 122 can be obtained in the same way, such as red attenuation ratio coef3_R, green attenuation ratio coef3_G, and blue attenuation ratio.
  • Color attenuation ratio coef3_B can be obtained in the same way, such as red attenuation ratio coef3_R, green attenuation ratio coef3_G, and blue attenuation ratio.
  • the attenuation ratio calculation circuit 302 is specifically configured to execute the foregoing S201 to S203.
  • the aging compensation method provided by the embodiment of the present application further includes S301 to S302 as shown in FIG. 8.
  • the display screen aging compensation circuit 30 can be used to specifically execute the foregoing S301 to S302.
  • a temperature collection node may be set on the back of each display area 110 to collect the temperature of the collection node, for example, a temperature sensor is used to collect, so as to obtain the temperature value of the display area 110 the goal of.
  • the display screen aging compensation circuit 30 is also used to obtain the attenuation ratio of each primary color of the display area 110 according to the above temperature.
  • the temperature sensor may transmit the collected temperature to the data statistics circuit 301 in FIG. 5.
  • the data statistics circuit 301 transmits the temperature value to the attenuation ratio calculation circuit 302.
  • each temperature value corresponds to the attenuation ratio of the primary colors of the display area 110 acquired in the same sampling period P.
  • the attenuation ratio calculation circuit 302 executes the above S202 to obtain each of the primary colors.
  • the aging curve of red is shown in FIG. 9. According to the aging curve and the red aging curve fitted above, the constants (R_ ⁇ 0_25, R_k_25, R_ ⁇ _25) corresponding to the red color at 25° C. of the first display area 110a are obtained.
  • the constants (G_ ⁇ 0_25, G_k_25, G_ ⁇ _25) corresponding to the green color in the first display area 110a at 25°C and the constants (B_ ⁇ 0_25, B_k_25, B_ ⁇ _25) corresponding to the blue color at 25°C can be obtained.
  • the attenuation ratio of each primary color of the primary colors of the first display area 110a at 25° C. such as red attenuation ratio coef1_R_25, green attenuation ratio coef1_G_25, and blue attenuation ratio coef1_B_25, can be obtained.
  • each of the primary colors can be obtained, for example, the aging curve of red is shown in FIG. 9. According to the aging curve and the red aging curve fitted above, the constants (R_ ⁇ 0_55, R_k_55, R_ ⁇ _55) corresponding to the red color at 55° C. of the first display area 110a are obtained.
  • the attenuation ratio of each primary color in the first display area 110a at 55° C. such as red attenuation ratio coef1_R_55, green attenuation ratio coef1_G_55, and blue attenuation ratio coef1_B_55, can be obtained.
  • the time interval of another sampling period adjacent to the collection temperature can be set to be larger. That is, the interval between two adjacent sampling periods used to collect temperature values and display data is greater than or equal to the interval between two adjacent sampling periods only used to collect display data.
  • the following formula (2) is used to weighted average the attenuation ratios of the same primary color corresponding to different temperature values, and the obtained red attenuation ratio in the first display area 110a is:
  • Coef1_cu_R coef1_R_25*(1- ⁇ )+coef1_R_55* ⁇ ;
  • the green attenuation ratio Coef1_cu_G and the blue attenuation ratio Coef1_cu_B of the first display area 110a can be obtained.
  • the attenuation ratio of each primary color in the second display area 110b of the secondary display 121 can be obtained, for example, the red attenuation ratio Coef2_cu_R, the green attenuation ratio Coef2_cu_G, and the blue Attenuation ratio Coef2_cu_B.
  • the attenuation ratio of each primary color in the third display area 110c of the curved screen 122 can be obtained in the same way, such as the red attenuation ratio Coef3_cu_R, the green attenuation ratio Coef3_cu_G, and the blue attenuation ratio.
  • Color attenuation ratio Coef3_cu_B Color attenuation ratio Coef3_cu_B.
  • S103 Perform aging compensation for each display area 110 according to the attenuation ratio of each primary color of each display area 110.
  • the display screen aging compensation circuit 30 further includes a compensation circuit 303 coupled to the attenuation ratio calculation circuit 302 and the display screen 10.
  • the compensation circuit 303 is used for performing aging compensation for each display area 110 according to the attenuation ratio of each primary color of each display area 110.
  • the display screen 10 includes the DDIC 20 as shown in FIG. 1b
  • the electronic device 01 includes the SoC as shown in FIG. 1a coupled to the DDIC 20.
  • at least a part of the display aging compensation circuit 30 in FIG. 5, such as the data statistics circuit 301 and the compensation circuit 303 can be integrated into the SoC.
  • the SoC includes an AP
  • the above-mentioned data statistics circuit 301 and compensation circuit 303 can be integrated in the AP, so that there is no need to separately provide the data statistics circuit 301 and the compensation circuit 303 in the electronic device 01 to achieve the purpose of simplifying the circuit structure.
  • the gamma correction unit in the AP is a correction unit in the digital domain of the AP.
  • the gamma correction unit can correct the input gray scale value through the gray scale lookup table according to the input gray scale value, and transmit the corrected gray scale value to the DDIC 20 for display.
  • the ratio of the grayscale output value L_y to the grayscale input value L_x is less than one after the correction of the gamma correction unit, as shown in FIG. 11.
  • the above S103 includes:
  • the compensation circuit 303 of the display screen aging compensation circuit 30 can be specifically used to obtain a gray level value of each primary color of the first display area 110a from the gray level look-up table of the first display area 110a as the gray level input value L_x .
  • L_x 255.
  • the compensation circuit 303 of the display screen aging compensation circuit 30 is also specifically configured to obtain the grayscale output value L_y corresponding to each grayscale input value L_x to form the grayscale look-up table of the second display area 110b.
  • the DDIC 20 may be coupled to the display aging compensation circuit 30.
  • the aforementioned grayscale lookup table can enable the DDIC 20 to call the grayscale lookup tables of the first display area 110a and the second display area 110b, and drive the display screen 10 to display.
  • the attenuation ratio of each primary color of the first display area 110a is the attenuation ratio of each primary color of the first display area 110a.
  • coef2 is the attenuation ratio of each primary color of the second display area 110b.
  • the aforementioned attenuation ratio may be the attenuation ratio obtained by performing the aforementioned S301 and S302 after adding the temperature factor.
  • r is the gamma value of the display screen.
  • the red attenuation ratio coef1 0.96.
  • the red attenuation ratio coef2 0.98.
  • the brightness and color of the screen when the first display area 110a displays the grayscale value of 255 may be the same or approximately the same as the brightness and color of the screen when the second display area 110b displays the grayscale value of 253.
  • the 0-255 gray-scale values of each primary color in the gray-scale look-up table of the first display area 110a can be used as the above-mentioned gray-scale input value L_x one by one, and each primary color under each primary color can be obtained through the first compensation formula.
  • the gray-scale output value L_y corresponding to the gray-scale input value L_x forms a second display area, for example, the gray-level set gamma_b of the second display area 110b of the secondary display screen 121 (as shown in FIG. 12). Therefore, when the secondary display screen 121 performs display, the AP can use the grayscale set gamma_b to provide the secondary display screen 121 with grayscale values through the DDIC20.
  • the aforementioned DDIC 20 can drive the first display area 110a to display according to the gray level input value L_x in the gray level lookup table of the first display area 110a of the main display screen 120.
  • the first display area 110a displays the grayscale input value L_x, for example, the brightness and color of the screen when the grayscale value is 255
  • the second display area 110b displays the grayscale output value L_y that matches the grayscale input value L_x.
  • the grayscale value is 253
  • the brightness and color of the screen can be the same, or approximately the same. Therefore, by reducing the gray scale of the second display area 110b with a shorter use time, the purpose of compensating for the aging of the first display area 110a is achieved, so that the display effects of the first display area 110a and the second display area 110b with different use times are the same. , Or approximately the same.
  • the red attenuation ratio coef1 0.96.
  • the red attenuation ratio coef2 0.99.
  • the brightness and color of the screen when the first display area 110a displays the grayscale value of 255 may be the same or approximately the same as the brightness and color of the screen when the third display area 110c displays the grayscale value of 253.
  • the 0-255 grayscale values of each primary color in the grayscale look-up table of the first display area 110a can be used as the above-mentioned grayscale input value L_x one by one, and the first compensation formula can be used to obtain each primary color
  • the gray-scale output value L_y corresponding to each gray-scale input value L_x constitutes the gray-scale set gamma_c of the third display area 110c of the curved screen 122 (as shown in FIG. 12). Therefore, when the curved screen 122 performs display, the AP can use the grayscale set gamma_c to provide the grayscale value to the curved screen 122 through the DDIC 20.
  • the compensation circuit 303 of the display aging compensation circuit 30 takes the first display area 110a of the main display 120 as a reference, so that the sub display 121 and the bending screen 122 can obtain the difference from the main display area in their respective grayscale sets.
  • the gray scale value displayed on the display screen 120 satisfies the gray scale value of the above-mentioned first compensation formula, so that when the secondary display screen 121 and the bending screen 122 adopt their respective gray scale look-up tables for display, they can communicate with the main display screen 120 when displaying images.
  • the brightness and color are close to the same.
  • the aging compensation method obtained by the embodiments of the present application obtains the first display area 110a of the main display screen 120, the second display area 110b of the sub display screen 121, and the third display area of the bending screen 122 in the folding screen.
  • the attenuation ratio of each primary color in each display area is obtained through the aging test, combined with the aging formula and the aging curve, and the attenuation ratio is corrected in combination with the temperature factor.
  • the main display screen 120 taking the main display screen 120 as a reference, obtain the respective gray scale sets c of the sub display screen 121 and the bending screen 122, so that each of the primary colors of the main display screen 120 corresponds to a gray scale value
  • the grayscale values corrected by the attenuation ratio can be found in the respective grayscale set c of the secondary display 121 and the bending screen 122, and then output to the DDIC20 to control the secondary display 121 and the bending screen 122 according to their respective grayscales.
  • the grayscale values in the set c are displayed, so that the brightness and color of the image displayed on the secondary display screen 121, the bending screen 122, and the main display screen 120 are close to the same. In the outward-folding display, the difference in the display effects of the secondary display screen 121, the bending screen 122, and the main display screen 120 is reduced.
  • the above method is not only used for the above-mentioned three-fold folding screen with the main display 120, the secondary display 121, and the bending screen 122, but also can be applied to folding screens with more than three folds.
  • the compensation method of each display area 110 is the same as above. Said. I will not repeat them here.
  • the above S103 includes:
  • the compensation circuit 303 of the display aging compensation circuit 30 can obtain the initial demura data in the demura look-up table in the DDIC20.
  • the aforementioned initial demura data includes multiple demura compensation areas, and a grayscale input value L_x corresponding to each demura compensation area.
  • the aforementioned initial demura data further includes a demura compensation coefficient a and a demura offset b.
  • first display area 110a of the main display screen 120 includes at least one demura compensation area 40 described above.
  • second display area 110b of the secondary display screen 121 or the third display area 110c of the bending screen 122 includes at least one demura compensation area 40 described above.
  • the compensation circuit 303 of the display aging compensation circuit 30 is specifically used to obtain the gray level output value L_y corresponding to each gray level input value L_x, and multiple gray level output values L_y to form the gray level of the demura compensation area 40. Lookup table.
  • the DDIC 20 may be coupled to the display aging compensation circuit 30.
  • the aforementioned grayscale lookup table can enable the DDIC 20 to call the grayscale lookup table of each demura compensation area 40 in the display area 110 and drive the display area 110 of the display screen 10 for display.
  • coef_d is the attenuation ratio of each primary color in the demura compensation area
  • the attenuation ratio of each primary color in the demura compensation area 40 is the same as the attenuation ratio of the same primary color in the display area 110 where the demura compensation area 40 is located.
  • the red attenuation ratio coef1 0.96.
  • the red attenuation ratio coef2 0.98.
  • the DDIC 20 can be based on the grayscale lookup table of each demura compensation area 40 in the second display area 110b
  • the grayscale output value L_y of drives the second display area 110b for display.
  • the red attenuation ratio coef2 0.99.
  • the DDIC 20 can be based on the grayscale lookup table of each demura compensation area 40 in the third display area 110c.
  • the grayscale output value L_y of drives the third display area 110c for display.
  • the grayscale output value L_y is related to the data voltage Vdata provided by the DDIC 20 to the display screen, and the attenuation ratio coef_d of each primary color in the demura compensation area is related to the driving current I flowing through the OLED device in the sub-pixel 21.
  • the driving current I is related to the square of the data voltage Vdata input to the pixel circuit 201 of the sub-pixel 21. Therefore, when the demura initial data is repaired by the attenuation ratio coef_d, the demura compensation coefficient a in the demura initial data needs to be multiplied by sqrt(coef_d), rather than directly multiplied by the attenuation ratio coef_d.
  • the compensation circuit 303 of the display aging compensation circuit 30 writes the gray level look-up table of each demura compensation area 40 into the DDIC 20, so that the DDIC 20 can look up the gray level according to the gray level of each demura compensation area 40 Drive each demura compensation area 40 to display.
  • the difference between this example and the first example is that according to the attenuation ratio of each primary color in each display area 110 that has been obtained, it is fused with the initial data of demura read by the DDIC end, so as to compare each display area.
  • the grayscale value in the grayscale look-up table of each demura compensation area 40 in 110 is corrected to reduce the difference in the display effect of the secondary display 121, the bending screen 122 and the main display 120 in the folding display. purpose.
  • first display area 110a of the main display screen 120, the second display area 110b of the sub display screen 121, and the third display area 110c of the bending screen 122 each include at least one demura compensation area 40 described above. Therefore, each display area can be further divided into a demura compensation area 40 with a smaller area for aging compensation, which improves the accuracy of aging compensation.
  • An embodiment of the present application provides an electronic device, and the computer device includes a memory and a processor.
  • the aforementioned memory stores a computer program that can run on a processor, and the processor implements the aforementioned method when the processor executes the computer program.
  • the above-mentioned electronic device may include at least one processor. Multiple processors can be discrete devices and are also integrated on the same chip, such as an SoC.
  • an embodiment of the present application provides a computer-readable medium, which stores a computer program.
  • the computer program is executed by the processor, the method as described above is realized.
  • the memory can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • ROM read-only memory
  • RAM random access memory
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • the memory can exist independently and is connected to the processor through a communication bus.
  • the memory can also be integrated with the processor.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • a software program it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the display screen aging compensation circuit 30 such as the data statistics circuit 301 and the compensation circuit 303, can be set on the SOC.
  • the AP in the SOC and realized by coupling the AP with the data statistics circuit 301 and the compensation circuit 303 to the DDIC 20.
  • the above-mentioned data statistics circuit 301 and compensation circuit 303 may be arranged in a display subsystem (DSS), which is implemented by coupling the DSS and the DDIC 20. So you can quickly adapt to the screens of different manufacturers.
  • DSS display subsystem

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Abstract

本申请实施例提供一种显示屏老化补偿方法、电路系统、电子设备,涉及显示技术领域,用于对显示屏进行老化补偿,减小显示差异。显示屏的老化补偿方法包括:首先,获取每个显示区的显示数据。其中,显示数据包括显示区的使用时间t、获取显示数据之前各原色的灰阶最大值Lev_max、在使用时间t内,各原色的灰阶均值Lev。接下来,根据显示数据获取显示区的各原色的衰减比。最后,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿。

Description

一种显示屏老化补偿方法、电路系统、电子设备
本申请要求于2019年09月06日提交国家知识产权局、申请号为201910843123.4、申请名称为“一种显示屏老化补偿方法、电路系统、电子设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域,尤其涉及一种显示屏老化补偿方法、电路系统、电子设备。
背景技术
随着显示技术的急速进步,作为显示装置核心的半导体元件技术也随之得到了飞跃性的进步。对于现有的显示装置而言,有机发光二极管(Organic Light Emitting Diode,OLED)作为一种电流型发光器件,因其所具有的自发光、快速响应、宽视角和可制作在柔性衬底上等特点而越来越多地被应用于高性能显示领域当中。
然而OLED显示屏在使用过程中,由于蓝色像素衰减较快,从而使得屏幕会出现偏黄的现象。特别是对于折叠显示屏而言,由于折叠至主屏背面的副屏的使用时长较少,使得主屏和副屏的屏幕衰减程度不同,因此当主屏和副屏展开一同显示时,主屏和副屏的出现偏黄的程度不同,从而容易产生用户可察觉的显示效果差异。
发明内容
本申请实施例提供一种显示屏老化补偿方法、电路系统、电子设备,用于对显示屏进行老化补偿,减小显示差异。
为达到上述目的,本申请实施例采用如下技术方案:
本申请实施例的第一方面,提供一种显示屏的老化补偿方法。其中,该显示屏包括至少一个显示区。上述显示屏的老化补偿方法包括:首先,获取每个显示区的显示数据。其中,显示数据包括显示区的使用时间t、获取显示数据之前各原色的灰阶最大值Lev_max、在使用时间t内,各原色的灰阶均值Lev。使用时间为显示屏开机后,显示区的累积亮屏时间。接下来,根据显示数据获取显示区的各原色的衰减比。最后,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿。以使得衰减程度不同,导致的老化程度不同的主显示屏的第一显示区、副显示屏的第二显示区,以及弯折屏的第三显示区的颜色接近一致。达到减小折叠显示器中,副显示屏、弯折屏与主显示屏显示效果上存在的差异。
可选的,显示数据还包括获取显示数据之前,显示区的亮度最大值DBV_max、在使用时间t内,显示区的亮度均值DBV。这样一来,当考虑到各个显示区的亮度因素后,可以使得主显示屏的第一显示区、副显示屏的第二显示区,以及弯折屏的第三显示区的亮度和颜色均能够接近一致,进一步减小不同显示区之间的显示差异。
可选的,根据显示数据获取显示区的各原色的衰减比包括:首先,根据显示数据,获取修正后的老化公式:
Figure PCTCN2020112892-appb-000001
其中,coef为显示区的各原色的衰减比;γ为显示屏的伽玛值;τ、k、β为常数。接下来,根据显示区中各原色的老化模型分别获取各原色对应的常数τ、k、β。最后,根据每个原色对应的常数τ、k、β以及修正后的老化公式,获取显示区的各原色中每个原色的衰减比coef。这样一来,可以将获取到的折叠屏中各个显示区,例如主显示屏的第一显示区、副显示屏的第二显示区,以及弯折屏的第三显示区的显示数据,通过老化试验,结合老化公式和老化模型获取每个显示区中,各原色的衰减比。
可选的,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿之前,上述方法还包括:首先,在至少两次获取显示数据的采样周期P内,分别获取显示区的温度值;每个温度值对应同一采样周期P内获取的显示区的各原色的衰减比。然后,结合显示区的当前温度值,将不同温度值分别对应的同一原色的衰减比进行加权平均,获取经过温度值修正后的,显示区的各原色的衰减比。这样一来,并结合温度因素对上述衰减比进行修正,以提高老化补偿的精度。
可选的,由于显示区温度的变化为一个缓慢的变化过程,因此采集温度的相邻另个采样周期的时间间隔可以设置的较大一些。因此相邻两次用于采集温度和显示数据的采样周期之间的间隔,大于或等于相邻两次仅用于采集显示数据的采样周期之间的间隔。
可选的,显示屏包括第一显示区和至少一个第二显示区。第一显示区的使用时间大于第二显示区的使用时间。在此情况下,第一显示区的衰减程度大于第二显示区的衰减程度。
可选的,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿包括:首先,从第一显示区的灰阶查找表中,获取第一显示区的各原色的一个灰阶值作为灰阶输入值L_x。接下来,获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成第二显示区的灰阶查找表。接下来,根据第一显示区的灰阶查找表中的灰阶输入值L_x,驱动第一显示区进行显示。根据灰阶输入值L_x,从第二显示区的灰阶查找表获取与灰阶输入值L_x相配的灰阶输出值L_y,并根据灰阶输出值L_y驱动第二显示区进行显示。这样一来,根据上述衰减比,以主显示屏为参考,获取副显示屏和弯折屏各自的灰阶集合,使得主显示屏各原色中每个原色对应的一个灰阶值,均能够在副显示屏和弯折屏各自的灰阶集合中,找到通过衰减比修正后的灰阶值,以输出至DDIC控制副显示屏和弯折屏根据各自的灰阶集合中的灰阶值进行显示,使得副显示屏、弯折屏与主显示屏显示图像的亮度和原色接近一致。从而通过降低使用时间较短的副显示屏、弯折屏的灰阶,达到对主显示屏的第一显示区进行老化补偿的目的,使得使用时间不同的显示区的显示效果相同,或近似相同。
可选的,获取每个灰阶输入值L_x对应的灰阶输出值L_y包括:根据第一补偿公式L_y=L_x*(coef1/coef2) (1/γ),获取每个灰阶输入值L_x对应的灰阶输出值L_y。这样一来,第一显示区中,每个原色在0~255的灰阶范围内中的灰阶输入值L_x,均可以通过上述第一补偿公式获取,第二显示区中同一原色的灰阶输出值L_y。从而使得第 二显示区中,各个原色的0~255个灰阶输出值L_y,可以构成的第二显示区的一个完整的灰阶查找表。其中,coef1为第一显示区的各原色的衰减比;coef2为第二显示区的各原色的衰减比;r为显示屏的伽玛值;其中,coef1<coef2。
可选的,至少一个显示区包括第一显示区和至少一个第二显示区。根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿包括:首先,获取demura查找表中的demura初始数据。其中,demura初始数据包括多个demura补偿区,以及与每个demura补偿区对应的灰阶输入值L_x。显示区包括至少一个demura补偿区。接下来,获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成demura补偿区的灰阶查找表。接下来,根据显示区内,各个demura补偿区的灰阶查找表中的灰阶输出值L_y,驱动显示区进行显示。这样一来,根据已经获取的各个显示区中,各原色的衰减比,与由DDIC端读取到的demura初始数据进行融合,以对各个显示区内的每个demura补偿区的灰阶查找表中的灰阶值进行修正,使得显示区实际显示的亮度和颜色与其衰减比相匹配,从而可以对该显示区的老化进行补偿。此外,主显示屏的第一显示区、副显示屏的第二显示区、弯折屏的第三显示区,各自包括至少一个上述demura补偿区。因此每个显示区可以进一步划分成面积更小的demura补偿区进行老化补偿,提高了老化补偿的精度。
可选的,demura初始数据还包括与每个demura补偿区对应的demura补偿系数a和demura偏移量b。上述获取每个灰阶输入值L_x对应的灰阶输出值L_y包括:根据第二补偿公式L_y=(a*sqrt(coef_d))*L_x+b,获取每个灰阶输入值L_x对应的灰阶输出值L_y。这样一来,显示区中每原色在0~255的灰阶范围内中的灰阶输入值L_x,均可以通过上述第一补偿公式获取,该显示区同一原色的灰阶输出值L_y。从而使得该显示区中各个原色的0~255个灰阶输出值L_y,可以构成的上述显示区的一个完整的,经过衰减比修正过的灰阶查找表。其中,coef_d为demura补偿区的各原色的衰减比,demura补偿区的各原色的衰减比为该demura补偿区所在的显示区中同一原色的衰减比。
可选的,在使用时间t内,获取显示区的亮度均值DBV的方法包括:首先,在获取显示数据时,获取显示区的当前亮度值DBV_c。在当前亮度值DBV_c为0的情况下,显示区的亮度均值DBV保持获取显示数据之前获取的亮度均值DBV_aver。或者,在当前亮度值DBV_c为非零值的情况下,显示区的亮度均值DBV满足公式:DBV=(t*60*DBV_aver+T*DBV_c)/(t*60+T)。其中,使用时间t的单位为小时,采样周期P的单位为分钟。达到获取显示区的亮度均值DBV的目的。
本申请实施例的第二方面,提供一种电路系统。该电路系统包括显示屏老化补偿电路。显示屏包括至少一个显示区。显示屏老化补偿电路用于:获取每个显示区的显示数据。其中,显示数据包括显示区的使用时间t、获取显示数据之前,各原色的灰阶最大值Lev_max、在使用时间t内,各原色的灰阶均值Lev;使用时间为显示屏开机后,显示区的累积亮屏时间。根据显示数据获取显示区的各原色的衰减比。根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿。该老化补偿电路具有与前述实施例提供的老化补偿方法相同的技术效果,此处不再赘述。
可选的,显示数据还包括获取显示数据之前,显示区的亮度最大值DBV_max、在 使用时间t内,显示区的亮度均值DBV。根据显示数据获取显示区的各原色的衰减比,具体包括:
根据显示数据,获取修正后的老化公式:
Figure PCTCN2020112892-appb-000002
其中,coef为显示区的各原色的衰减比;γ为显示屏的伽玛值;τ、k、β为常数。根据显示区中各原色的老化模型分别获取各原色对应的常数τ、k、β。根据每个原色对应的常数τ、k、β以及修正后的老化公式,获取显示区的各原色中每个原色的衰减比coef。显示屏老化补偿电路根据显示数据,获取显示区的各原色的衰减的技术效果同上所述,此处不再赘述。
可选的,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿之前,显示屏老化补偿电路还用于:在至少两次获取显示数据的采样周期P内,分别获取显示区的温度值。每个温度值对应同一采样周期P内获取的显示区的各原色的衰减比。此外,结合显示区的当前温度值,将不同温度值分别对应的同一原色的衰减比进行加权平均,获取经过温度值修正后的,显示区的各原色的衰减比。显示屏老化补偿电路执行上述功能的技术效果同上所述,此处不再赘述。
可选的,显示屏包括第一显示区和第二显示区。第一显示区的使用时间大于第二显示区的使用时间。根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿,具体包括:从第一显示区的灰阶查找表中,获取第一显示区的各原色的一个灰阶值作为灰阶输入值L_x,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成第二显示区的灰阶查找表,以使得与显示屏耦接的显示驱动电路调用上述灰阶查找表(例如第一显示区、第二显示区的灰阶查找表),并驱动显示屏进行显示。显示屏老化补偿电路执行上述功能的技术效果同上所述,此处不再赘述。
可选的,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿,具体包括:获取demura查找表中的demura初始数据,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以L_y构成demura补偿区的灰阶查找表,以使得与显示屏耦接的显示驱动电路调用灰阶查找表,并驱动显示屏进行显示。其中,demura初始数据包括多个demura补偿区,以及与每个demura补偿区对应的灰阶输入值L_x;显示区包括至少一个demura补偿区。显示屏老化补偿电路执行上述功能的技术效果同上所述,此处不再赘述。
本申请实施例的第三方面,提供一种电子设备,包括显示屏、显示屏老化补偿电路和显示驱动电路。显示屏包括至少一个显示区。显示屏老化补偿电路用于每个显示区的显示数据。其中,显示数据包括显示区的使用时间t、获取显示数据之前,各原色的灰阶最大值Lev_max、在使用时间t内,各原色的灰阶均值Lev;使用时间为显示屏开机后,显示区的累积亮屏时间。根据显示数据获取显示区的各原色的衰减比。根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿。显示驱动电路与显示屏耦接。显示屏老化补偿电路与显示驱动电路耦接。该电子设备与前述实施例提供的显示屏的老化补偿电路具有相同的技术效果,此处不再赘述。
可选的,显示数据还包括获取显示数据之前,显示区的亮度最大值DBV_max、在使用时间t内,显示区的亮度均值DBV。根据显示数据获取显示区的各原色的衰减比,具体包括:
根据显示数据,获取修正后的老化公式:
Figure PCTCN2020112892-appb-000003
其中,coef为显示区的各原色的衰减比;γ为显示屏的伽玛值;τ、k、β为常数。根据显示区中各原色的老化模型分别获取各原色对应的常数τ、k、β。根据每个原色对应的常数τ、k、β以及修正后的老化公式,获取显示区的各原色中每个原色的衰减比coef。电子设备中的显示屏老化补偿电路根据显示数据,获取显示区的各原色的衰减的技术效果同上所述,此处不再赘述。
可选的,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿之前,显示屏老化补偿电路还用于:在至少两次获取显示数据的采样周期P内,分别获取显示区的温度值。每个温度值对应同一采样周期P内获取的显示区的各原色的衰减比。此外,结合显示区的当前温度值,将不同温度值分别对应的同一原色的衰减比进行加权平均,获取经过温度值修正后的,显示区的各原色的衰减比。电子设备的显示屏老化补偿电路执行上述功能的技术效果同上所述,此处不再赘述。
可选的,显示屏包括第一显示区和第二显示区。第一显示区的使用时间大于第二显示区的使用时间。根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿,具体包括:从第一显示区的灰阶查找表中,获取第一显示区的各原色的一个灰阶值作为灰阶输入值L_x,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成第二显示区的灰阶查找表。电子设备的显示屏老化补偿电路执行上述功能的技术效果同上所述,此处不再赘述。
可选的,显示驱动电路具体用于调用上述第一显示区、第二显示区的灰阶查找表,并驱动显示屏进行显示。从而使得第一显示区、第二显示区显示图像的亮度和原色接近一致。
可选的,根据每个显示区的各原色的衰减比,对各个显示区进行老化补偿,具体包括:获取demura查找表中的demura初始数据,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以L_y构成demura补偿区的灰阶查找表。其中,demura初始数据包括多个demura补偿区,以及与每个demura补偿区对应的灰阶输入值L_x;显示区包括至少一个demura补偿区。电子设备的显示屏老化补偿电路执行上述功能的技术效果同上所述,此处不再赘述。
可选的,显示驱动电路具体用于调用demura补偿区的灰阶查找表,并驱动显示屏进行显示。从而使得显示屏的显示区实际显示的亮度和颜色与其衰减比相匹配,达到对该显示区的老化进行补偿的目的。
可选的,电子设备包括片上系统,显示屏老化补偿电路的至少一部分设置于片上系统内。从而达到简化电路结构的目的。
可选的,显示屏包括第一显示区和第二显示区。第一显示区的使用时间大于第二 显示区的使用时间。显示屏包括主显示屏、位于主显示屏一侧的副显示屏。主显示屏的有效显示区为显示屏的第一显示区;副显示屏的有效显示区为显示屏的第二显示区。当副显示屏弯折至主显示屏的背面时,副显示屏的显示面远离主显示屏。该显示屏为两折、外折式的折叠屏。
可选的,显示屏还包括第三显示区。第一显示区的使用时间大于第三显示区的使用时间。显示屏还包括位于主显示屏和副显示屏之间的弯折屏。弯折屏用于当副显示屏弯折至主显示屏的背面时发生弯曲变形。弯折屏的有效显示区为显示屏的第三显示区。该显示屏为三折、外折式的折叠屏。
本申请实施例的第四方面,提供一种电子设备。该电子设备包括存储器、处理器。存储器上存储有可在处理器上运行的计算机程序,处理器执行计算机程序时实现如上所述的任意一种方法。上述电子设备与前述实施例提供的显示屏的老化补偿方法具有相同的技术效果,此处不再赘述。
本申请实施例的第五方面,提供一种计算机可读介质,其存储有计算机程序。该计算机程序被处理器执行时实现如上所述的任意一种方法。该计算机可读介质与前述实施例提供的显示屏的老化补偿方法具有相同的技术效果,此处不再赘述。
附图说明
图1a为本申请的一些实施例提供的一种电子设备的结构示意图;
图1b为图1a中显示屏的一种结构示意图;
图1c为图1a中亚像素内像素电路和OLED器件的连接结构示意图;
图2a为本申请的一些实施例提供的一种具有多个显示区的显示屏的结构示意图;
图2b为图2a所示的显示屏进行折叠的示意图;
图3a为本申请的一些实施例提供的另一种具有多个显示区的显示屏的结构示意图;
图3b为图3a所示的显示屏进行折叠的示意图;
图4为本申请的一些实施例提供的显示屏的一种老化补偿方法流程图;
图5为本申请的一些实施例提供的显示屏老化补偿电路的一种结构示意图;
图6为图4中S102的一种实施方式流程图;
图7为本申请的一些实施例提供的一种老化曲线的示意图;
图8为本申请的一些实施例提供的显示屏的另一种老化补偿方法流程图;
图9为本申请的一些实施例提供的另一种老化曲线的示意图;
图10为本申请的一些实施例提供的显示屏老化补偿电路的另一种结构示意图;
图11为本申请的一些实施例提供的输入灰阶和输出灰阶关系线条图;
图12为本申请的一些实施例提供的显示屏的一种老化补偿方式示意图;
图13为本申请的一些实施例提供的显示屏的另一种老化补偿方式示意图;
图14为本申请的一些实施例提供的demura补偿区的设置方式示意图。
附图标记:
01-电子设备;10-显示屏;11-中框;12-壳体;100-AA区;101-非显示区;20-DDIC;21-亚像素;201-像素电路;110-显示区;120-主显示屏;121-副显示屏;122-弯折屏;30-显示屏老化补偿电路;301-数据统计电路;302-衰减比计算电路;303-补偿电路; 40-demura补偿区。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。
以下,术语“第一”、“第二”等仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中,除非另有说明,“多个”的含义是两个或两个以上。
此外,本申请中,“上”、“下”、“左”、“右”等方位术语是相对于附图中的部件示意置放的方位来定义的,应当理解到,这些方向性术语是相对的概念,它们用于相对于的描述和澄清,其可以根据附图中部件所放置的方位的变化而相应地发生变化。
在本申请中,除非另有明确的规定和限定,术语“耦接”可以是直接电性连接,也可以通过中间媒介间接电性连接。
本申请实施例提供一种如图1a所示的电子设备01。该电子设备01包括例如手机、平板电脑、个人数字助理(personal digital assistant,PDA)、车载电脑等。本申请实施例对上述电子设备01的具体形式不做特殊限制。以下为了方便说明,是以电子设备01为手机为例进行的说明。上述电子设备01结构,如图1a所示,主要包括显示屏10、中框11以及壳体12。显示屏10和中框11设置于壳体12内。
需要说明的是,图1a是以电子设备01包括一个显示屏10为例进行的说明。在本申请实施例中,电子设备01包括两个显示屏10。上述两个显示屏10可以分别设置于中框11的两侧。从而可以使得电子设备的正面和背面均能够进行显示。
如图1b所示,显示屏10包括有效显示区(active area,AA)100和位于该AA区100周边的非显示区101。该AA区100包括多个亚像素(sub pixel)21。为了方便说明,本申请中上述多个亚像素21是以矩阵形式排列为例进行的说明。
需要说明的是,本申请实施例中,图1b中沿水平方向X排列成一排的亚像素21称为同一行亚像素,沿竖直方向Y排列成一排的亚像素21称为同一列亚像素。
在本申请的实施例中,上述显示屏10为OLED显示屏。该OLED显示屏能够实现自发光。在此情况下,AA区100中的亚像素21内,设置有如图1c所示的OLED器件以及用于驱动该OLED器件进行发光的像素电路201。
此外,上述电子设备可以包括用于驱动显示屏10进行显示的显示驱动电路,该显示驱动电路可以与显示屏10耦接。示例的,该显示驱动电路可以为显示驱动芯片(display driver integrated circuit,DDIC)。在本申请的一些实施例中,如图1b所示,DDIC20设置于显示屏10的非显示区101中。同一列亚像素21中的像素电路201通过同一条数据线(data line,DL)与DDIC20耦接。在本申请的另一些实施例中,上述DDIC20还可以独立于显示屏10设置。
如图1a所示,上述电子设备01还包括设置于印刷电路板(printed circuit board,PCB),以及安装于该PCB上的片上系统(System on Chip,SoC)。该SoC内可以设置有应用处理器(application processor,AP)。图1b中的DDIC20通过柔性电路板(flexible printed circuit,FPC)与SoC耦接。
这样一来,可以使得SoC输出的显示数据通过DDIC20后,转换成数据电压Vdata传输至各条数据线DL所耦接的各个亚像素21的像素电路201中。接下来,各个像素电路201通过数据线DL上的数据电压Vdata,生成与该数据电压Vdata相匹配的驱动电流I,以驱动亚像素21中的OLED器件发光。
显示屏10中各个亚像素21中的像素电路201、OLED器件以及数据线DL等可以制作于一衬底基板上。该衬底基板可以采用柔性树脂材料构成。在此情况下,该OLED显示屏可以作为折叠显示屏。或者,上述OLED显示屏中的衬底基板还可以采用质地较硬的材料,例如玻璃构成。在此情况下,上述OLED显示屏为硬质显示屏。
此外,上述显示屏10可以包括多个显示区。例如,显示屏10如图2a所示包括两个显示区110。其中,不同显示区110的使用时间t可以不同。需要说明的是,本申请实施例中的使用时间t是指上述显示屏10开机后到当前时刻,该显示区110的累积亮屏(即屏幕发光)时间。
以显示屏10为折叠显示屏为例,在本申请的一些实施例中,如图2b所示,上述显示屏可以包括主显示屏120和位于该主显示屏120一侧的副显示屏121。当副显示屏121沿图2b中的箭头方向,弯折至主显示屏120的背面时,副显示屏121的显示面远离主显示屏120。
在此情况下,具有上述主显示屏120和副显示屏121的显示屏10,其折叠方式为外折者式。即主显示屏120和副显示屏121折叠后,主显示屏120和副显示屏121的显示面均位于外侧。
基于此,该主显示屏120的AA区为该显示屏10的第一显示区110a。副显示屏121的AA区为显示屏10的第二显示区110b。此时,显示屏10包括两个显示区,分别为第一显示区110a和第二显示区110b。
通常为了方便用户使用,显示屏10呈折叠状态,仅通过主显示屏120进行画面显示,而副显示屏121处于息屏状态。当用户观看电影或者玩游戏时,为了追求更好的视觉效果,可以将显示屏10的主显示屏120和副显示屏121展开,主显示屏120和副显示屏121均进行显示以获取更大的显示面积。因此,主显示屏120的第一显示区110a的使用时间t1,大于副显示屏121的第二显示区110b的使用时间t2。
或者,在本申请的另一些实施例中,如图3a所示,显示屏110包括三个使用时间不同的显示区。
以显示屏10为折叠显示屏为例,上述显示屏10如图3b所示还包括主显示屏120、副显示屏121以及位于主显示屏120和副显示屏121之间的弯折屏122。其中,弯折屏122用于当副显示屏121沿图3b的箭头方向弯折至主显示屏120的背面时发生弯曲变形。
在此情况下,具有上述主显示屏120、副显示屏121以及弯折屏122的显示屏10,其折叠方式为外折者式。即主显示屏120和副显示屏121折叠后,主显示屏120、副显示屏121以及弯折屏122的显示面均位于外侧。
基于此,如图3b所示,主显示屏120的AA区为该显示屏10的第一显示区110a。副显示屏121的AA区为显示屏10的第二显示区110b,弯折屏122的AA区为显示屏10的第三显示区110c。此时,显示屏10包括三个显示区,分别为第一显示区110a、 第二显示区110b以及第三显示区110c。
在显示屏10处于折叠状态时,主显示屏120主要进行画面显示。副显示屏121可以在用户进行自拍时显示。而当用户将显示屏10展开时,主显示屏120、副显示屏121以及弯折屏122均进行显示。因此,主显示屏120的第一显示区110a的使用时间t1,大于副显示屏121的第二显示区110b的使用时间t2,该第二显示区110b的使用时间t2大于弯折屏122的第三显示区110c的使用时间t3。
需要说明的是,上述仅仅是对显示屏10作为折叠屏时,折叠方式的举例说明。在另一些实施例中,折叠屏还具有内折、内外折的折叠方式,且显示屏10中能够进行折叠的区域数量的设置方式也不限于上述两种,但是显示区110的设置方式同上所述,在此不再一一赘述。
此外,上述第一显示区110a、第二显示区110b以及第三显示区110c之间的边界线的位置,可以根据需要进行配置,本申请对此不作限定,只要能够保证上述区域的边界线位于相邻两列(或两行)亚像素21之间即可。
由上述可知,显示屏10中各个显示区的使用时间存在差异,使得各个显示区的老化程度也存在差异,因此为了减小由于老化差异导致的各个显示区在显示画面时出现的亮度或颜色差异,本申请实施例提供一种显示屏10的老化补偿方法。该老化补偿方法如图4所示,S101~S103。为了实现上述S101~S103,本申请的一些实施例提供一种电路系统。该电路系统包括如图5所示的显示屏老化补偿电路30。该显示屏老化补偿电路30可以用于执行上述S101~S103。
或者,本申请的另一些实施例中,上述电子设备01可以包括上述显示屏老化补偿电路30。
其中,S101、获取每个显示区110的显示数据。
示例的,可以将每次获取每个显示区110的显示数据的这段时间成为采样周期P。
其中,在本申请的一些实施例中,显示数据可以包括显示区110的使用时间t、获取上述显示数据之前,即当前采样周期P之前,各原色灰阶最大值Lev1_max、在该使用时间t内,各原色的灰阶均值Lev1。
或者,在本申请的另一些实施例中,上述显示数据还可以包括获取上述显示数据之前,显示区110的亮度最大值DBV1_max、在该使用时间t内,显示区110的亮度均值DBV。
需要说明的是,在本申请实施例的一些实施例中,上述各原色可以分别是红色(red,R)、绿色(green,G)以及蓝色(blue,B)。或者,在另一些实施例中,各原色可以分别是青色(cyan,C)、品红色(Magenta,M)以及黄色(yellow,Y)。在某些实施例中,还可以包括多于三种原色,例如根据人眼对绿色最为敏感的特性,引入草绿色和祖母绿两种绿色原色。本申请对此不作限定。
此外,显示数据中的各原色的灰阶均值Lev1和灰阶最大值Lev1_max是指,一个显示区110的显示数据包括每一种原色的灰阶均值Lev1和灰阶最大值Lev1_max。
基于此,为了执行上述S101,该显示屏老化补偿电路30可以包括如图5所示的数据统计电路301。该数据统计电路301用于在每个采样周期P,获取每个显示区110的显示数据。
每一个显示区110均有一组上述显示数据。例如当显示屏10包括图2b所示的主显示屏120和副显示屏121时,显示屏老化补偿电路30需要分别获取主显示屏120的第一显示区110a的显示数据、副显示屏121的第二显示区110b的显示数据。
或者,又例如,当显示屏10包括如图3b所示的主显示屏120、副显示屏121以及弯折屏122时,显示屏老化补偿电路30除了需要分别获取主显示屏120的第一显示区110a的显示数据、副显示屏121的第二显示区110b的显示数据以外,还需要获取弯折屏122的第三显示区110c的显示数据。
以下对显示数据中的一些参数进行举例说明。
使用时间t由上述可知,是指上述显示屏10开机后到当前时刻,该显示屏120的第一显示区110a的累积亮屏(即屏幕发光)时间。示例的,当在执行上述步骤S101之前,主显示屏120已经使用100个小时,在执行上述S101时,设置上述采样周期P为1分钟的情况下,该主显示屏120的累积亮屏时间为100+1/60=100.0167小时。即该主显示屏120的第一显示区110a的使用时间T=100.0167小时。
需要说明的是,本申请实施例对采样周期P的时长不做限定,例如可以为1分钟,或者30秒,或者2分钟等。
此外,作为示例,当在执行上述步骤S101之前,副显示屏121已经使用90个小时,如果在上述采样周期P内,副显示屏121折叠至主显示屏120的背面,且该副显示屏121的第二显示区110b处于息屏状态,则副显示屏121的累积亮屏时间为90+0=90小时。即该副显示屏121的第二显示区110b的使用时间t2=90小时。
在上述采样周期P内,副显示屏121的第二显示区110b能够进行累积的亮屏时间为0。弯折屏122的第三显示区110c的使用时间t3的统计方式同上所述,此处不再赘述。
在一些实施例中,在使用时间t内,获取显示区,例如主显示屏120的第一显示区110a的亮度均值DBV的方法包括:
首先,在获取上述显示数据时,获取第一显示区110a的当前亮度值DBV_c。在当前亮度值DBV_c为0的情况下,主显示屏120的第一显示区110a的亮度均值DBV保持获取显示数据之前获取的亮度均值DBV_aver。
或者,在当前亮度值DBV_c为非零值的情况下,例如DBV_c=1023cd/m 2时,根据以下公式获取第一显示区110a的亮度均值DBV。
DBV=(t*60*DBV_aver+T*DBV_c)/(t*60+T)
=(100*60*4095+1*1023)/(100*60+1)
=4094.488cd/m 2
其中,t=100小时;DBV_aver=4095cd/m 2;T=1分钟。上述是以主显示屏120的第一显示区110a为例对显示区的亮度均值DBV的获取方法进行说明。副显示屏121的第二显示区110b,以及弯折屏122的第三显示区110c的亮度均值DBV的获取方法同上所述,此处不再赘述。
此外,在使用时间t内,获取显示区,例如主显示屏120的第一显示区110a的各原色的灰阶均值Lev是指,分别获取第一显示区110a的红色灰阶均值Lev_R、绿色灰阶均值Lev_G以及蓝色灰阶均值Lev_B。
以获取第一显示区110a的红色灰阶均值Lev_R为例,对获取第一显示区110a的各原色的灰阶均值Lev的方法进行说明。
首先,在当前采样周期P内,当该第一显示区110a不亮时,主显示屏120的第一显示区110a的红色灰阶均值Lev_R保持当前采样周期之前获取的灰阶均值Lev_aver。
或者,当该第一显示区110a被点亮时,获取第一显示区110a的当前的红色灰阶均值Lev_R_c,例如Lev_R_c=50时,根据以下公式获取第一显示区110a的红色灰阶均值Lev_R。
Lev_R=(t*60*Lev_aver+T*Lev_R_c)/(t*60+T)
=(100*60*246+1*50)/(100*60+1)
=245.967。
其中,t=100小时;Lev_aver=246;T=1分钟。采用上述方法,可以获取第一显示区110a的绿色灰阶均值Lev_G以及蓝色灰阶均值Lev_B。
此外,副显示屏121的第二显示区110b的红色灰阶均值Lev_R、绿色灰阶均值Lev_G以及蓝色灰阶均值Lev_B,弯折屏122的第三显示区110c的红色灰阶均值Lev_R、绿色灰阶均值Lev_G以及蓝色灰阶均值Lev_B的获取方式同上所述,此处不再赘述。
S102、根据显示区110中显示数据获取显示区的各原色的衰减比。
获得衰减比的方式,可以是根据经验值,利用上述显示数据,例如累积显示时间t等获得衰减比,例如根据经验值,显示屏上的红色亚像素在累积发光100个小时之后灰阶最大值或者灰阶平均值衰减5%,则红色衰减比为5%。上述经验值可以通过对产品进行统计获得,也可以通过老化实验获得。
在本申请的一些实施例中,为了更精确的获得衰减比,通过各原色的老化模型结合显示数据来获得所述衰减比。上述老化模型可以用老化函数或者老化曲线来描述。
为了执行上述102,如图5所示,显示屏老化补偿电路30还用于根据显示区中各原色的老化模型、显示数据获取显示区的各原色的衰减比。示例的,显示屏老化补偿电路30还可以包括与数据统计电路301耦接的衰减比计算电路302。该衰减比计算电路302用于根据显示区110中各原色的老化曲线、显示数据获取显示区110的各原色的衰减比。
在本申请实施例中,上述显示屏老化补偿电路30在执行上述S102时,可以具体包括执行如图6所示的S201~S203。
S201、根据获取的显示数据,并获取修正后的老化公式:
Figure PCTCN2020112892-appb-000004
具体的,根据S101获取的显示数据,对拉伸衰减(stretched exponential decay,SED)公式:
Figure PCTCN2020112892-appb-000005
进行修正,根据S101获取的显示数据,并获取上述公式(1)。
其中,coef为显示区的各原色的衰减比;γ为显示屏的伽玛值;τ、k、β为常数。 τ为显示屏中与OLED器件的寿命以及初始亮度相关的参数。β为与OLED器件的材料和制作过程相关的参数。K为OLED器件的老化加速因子。
此外,L为当前采样周期P内,显示区110的亮度值;L 0为显示区110的初始亮度。在本申请的一些实施例中,初始亮度L 0可以为显示屏10开机后,在第一次的采样周期P内,显示区110的亮度值。
S202、根据显示区110中各原色的老化模型分别获取各原色对应的常数τ、k、β。
示例的,对公式(1)的等式两边取对数得到:
Figure PCTCN2020112892-appb-000006
接下来,在对上述公式的等式两边取对数得到:
Figure PCTCN2020112892-appb-000007
接下来,继续采用等式两边取对数的方式,可以获取一个线性模型Y=a0X+a1。其中,该线性模型中的系数a0、a1与上述公式(1)中的三个常数τ、k、β为常数有关。在此情况下,可以利用最小二乘法获取线性模型中的系数a0、a1,从而进一步获取常数τ、k、β。
具体的,先根据老化试验获取已知的数据点(Xi,Yi)的集合。其中,i≥1,i为正整数。上述已知数据点的获取方式可以为:以主显示屏120的第一显示区110a为例,对该第一显示区110a进行老化试验。示例的,在该第一显示区110a处于最高亮度下,显示多个特定灰阶画面,例如红色、绿色、蓝色以及白色画面,且每种原色都有255、216、164以及128四中灰阶。每次显示灰阶画面后,测量时间(图7中的横坐标X),以及亮度,并获取各原色的衰减比coef=L/L 0(图7中的纵坐标Y)。
上述多个已知数据点(Xi,Yi)可以大概分布为一条直线,称为拟合直线。该拟合直线并未通过所有已知数据点(Xi,Yi)。接下来,通过最小二乘原理拟合与上述拟合直线的距离平方和最小的曲线(即显示区110中各原色的老化曲线)。
在采用最小二乘法对上述老化曲线拟合的过程中,可以获取上述线性模型Y=a0X+a1中的系数a0、a1,最终得出常数τ、k、β的数值。例如,该第一显示区110a中红色对应的常数(R_τ0,R_k,R_β)、绿色对应的常数(G_τ0,G_k,G_β),以及蓝色对应的常数(B_τ0,B_k,B_β)。
S203,根据每个原色对应的常数τ、k、β以及修正后的老化公式,即上述公式(1),获取显示区,例如第一显示区110a的各原色中每个原色的衰减比,例如红色衰减比coef1_R、绿色衰减比coef1_G以及蓝色衰减比coef1_B。
同理采用上述S201~S203,可以获取副显示屏121的第二显示区110b的各原色中每个原色的衰减比,例如红色衰减比coef2_R、绿色衰减比coef2_G以及蓝色衰减比 coef2_B。
此外,在显示屏具有上述弯折屏122时,同理可以获取弯折屏122的第三显示区110c的各原色中每个原色的衰减比,例如红色衰减比coef3_R、绿色衰减比coef3_G以及蓝色衰减比coef3_B。
基于此,在显示屏老化补偿电路30包括衰减比计算电路302的情况下,该衰减比计算电路302具体用于执行上述S201~S203。
此外,为了提高显示屏老化补偿的精度,还可以在老化补偿的过程中,加入显示区110的温度因素对老化的影响。基于此,本申请实施例提供的老化补偿方法还包括如图8所示的S301~S302。该显示屏老化补偿电路30可以用于具体执行上述S301~S302。
S301、在至少两次获取所述显示数据的采样周期P内,分别获取显示区110的温度值。
为了执行上述S301,在本申请的一些实施例中可以在各个显示区110的背面设置温度采集节点,对采集节点的温度进行采集,例如,采用温度传感器进行采集,以达到获取显示区110温度值的目的。
接下来,显示屏老化补偿电路30还用于根据上述温度,获取显示区110的各原色的衰减比。具体的,温度传感器可以将采集到的温度传输至图5中的数据统计电路301。然后又该数据统计电路301将温度值传输至衰减比计算电路302。
其中,每个温度值对应同一采样周期P内获取的显示区110的各原色的衰减比。
例如,以主显示屏120的第一显示区110a为例,在25℃下,衰减比计算电路302执行上述S202,可以获取各原色中各个原色,例如红色的老化曲线如图9所示。根据该老化曲线,根据上述拟合出的红色老化曲线,得到该第一显示区110a,在25℃下红色对应的常数(R_τ0_25,R_k_25,R_β_25)。
同理可以获取第一显示区110a,在25℃下绿色对应的常数(G_τ0_25,G_k_25,G_β_25),以及25℃下蓝色对应的常数(B_τ0_25,B_k_25,B_β_25)。
接下来,执行上述S203后,可以获取在25℃下,第一显示区110a的各原色中每个原色的衰减比,例如红色衰减比coef1_R_25、绿色衰减比coef1_G_25以及蓝色衰减比coef1_B_25。
此外,在55℃下,在执行上述S301,可以获取各原色中各个原色,例如红色的老化曲线如图9所示。根据该老化曲线,根据上述拟合出的红色老化曲线,得到该第一显示区110a,在55℃下红色对应的常数(R_τ0_55,R_k_55,R_β_55)。
同理可以获取第一显示区110a,在55℃下绿色对应的常数(G_τ0_55,G_k_55,G_β_55),以及25℃下蓝色对应的常数(B_τ0_55,B_k_55,B_β_55)。
接下来,执行上述S203后,可以获取在55℃下,第一显示区110a的各原色中每个原色的衰减比,例如红色衰减比coef1_R_55、绿色衰减比coef1_G_55以及蓝色衰减比coef1_B_55。
此外,由于显示区110温度的变化为一个缓慢的变化过程,因此采集温度的相邻另个采样周期的时间间隔可以设置的较大一些。即相邻两次用于采集温度值和显示数据的采样周期之间的间隔,大于或等于相邻两次仅用于采集显示数据的所述采样周期之间的间隔。
S302、结合显示区110的当前温度值,将不同温度值分别对应的同一原色的衰减比进行加权平均,获取经过温度值修正后的,显示区110的各原色的衰减比。
其中,显示区110的当前温度值,为衰减比计算电路302执行上述S302时,该显示区110的温度值temp_cur,例如temp_cur=45摄氏度。以主显示屏120的第一显示区110a为例,则采用以下公式(2)将不同温度值分别对应的同一原色的衰减比进行加权平均,获取的第一显示区110a中红色衰减比为:
Coef1_cu_R=coef1_R_25*(1-α)+coef1_R_55*α;        (2)
其中,α=(45-25)/(55-25)=2/3。
同理在加入温度因素后,可以获取第一显示区110a的绿色衰减比Coef1_cu_G、蓝色衰减比Coef1_cu_B。
同理采用上述S301~S302,可以在加入温度因素后,获取副显示屏121的第二显示区110b的各原色中每个原色的衰减比,例如红色衰减比Coef2_cu_R、绿色衰减比Coef2_cu_G以及蓝色衰减比Coef2_cu_B。
此外,在显示屏具有上述弯折屏122时,同理可以获取弯折屏122的第三显示区110c的各原色中每个原色的衰减比,例如红色衰减比Coef3_cu_R、绿色衰减比Coef3_cu_G以及蓝色衰减比Coef3_cu_B。
S103、根据每个显示区110的各原色的衰减比,对各个显示区110进行老化补偿。
为了执行上述步骤,该显示屏老化补偿电路30还包括与衰减比计算电路302、显示屏10耦接的补偿电路303。该补偿电路303用于根据每个显示区110的各原色的衰减比,对各个显示区110进行老化补偿。
由上述可知,显示屏10包括如图1b所示的DDIC20,该电子设备01包括与DDIC20耦接的如图1a所示的SoC。在此情况下,为了简化电子设备01中的电路结构,可以如图10所示,将图5中的显示屏老化补偿电路30的至少一部分,例如数据统计电路301、补偿电路303集成于SoC中。例如在SoC包括AP的情况下,上述数据统计电路301、补偿电路303可以集成于AP中,从而无需在电子设备01中单独设置数据统计电路301、补偿电路303,达到简化电路结构的目的。
以下,对采用集成于AP中的补偿电路303如何根据每个显示区110的各原色的衰减比,对各个显示区110进行老化补偿的方式,进行举例说明。
方式一
本示例中,上述显示屏老化补偿电路30的补偿电路303利用AP中的gamma校正单元,执行上述S103。
需要说明的是,AP中的gamma校正单元是AP端数字域的校正单元。该gamma校正单元可以根据输入的灰阶值,通过灰阶查找表,对该输入的灰阶值进行修正,并将修正后的灰阶值传输至DDIC20以用于显示。
在此情况下,由于显示区110在显示的过程中存在老化现象,因此经过gamma校正单元的修正作用下,如图11所示,灰阶输出值L_y与灰阶输入值L_x的比值小于1。
基于此,上述S103包括:
首先,上述显示屏老化补偿电路30的补偿电路303可以具体用于从第一显示区110a的灰阶查找表中,获取第一显示区110a的各原色的一个灰阶值作为灰阶输入值 L_x。例如,L_x=255。
接下来,上述显示屏老化补偿电路30的补偿电路303还具体用于获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成第二显示区110b的灰阶查找表。例如,在本申请的一些实施例中,上述补偿电路303可以根据第一补偿公式L_y=L_x*(coef1/coef2) (1/γ),获取每个灰阶输入值L_x对应的灰阶输出值L_y。
在电子设备01包括上述显示驱动电路,例如上述DDIC20时,该DDIC20可以与显示屏老化补偿电路30耦接。在此情况下,上述灰阶查找表可以使得DDIC20能够调用第一显示区110a、第二显示区110b的灰阶查找表,并驱动显示屏10进行显示。
其中,为第一显示区110a的各原色的衰减比。coef2为第二显示区110b的各原色的衰减比。上述衰减比可以为加入温度因子后,通过执行上述S301和S302后获取的衰减比。此外,r为显示屏的伽玛值。
示例的,例如执行上述S301和S302后获取的第一显示区110a的各原色中,红色衰减比coef1=0.96。副显示屏121的第二显示区110b的各原色中,红色衰减比coef2=0.98。
此时,当灰阶输入值L_x=255时,根据上述第一补偿公式,可以获取灰阶输出值L_y=255*(0.96/0.98) (1/2.2)=253。在此情况下,第一显示区110a显示灰阶值255时画面的亮度和颜色,与第二显示区110b显示灰阶值253时画面的亮度和颜色可以相同,或者近似相同。
基于此,可以将第一显示区110a的灰阶查找表中每种原色的0~255个灰阶值,逐个作为上述灰阶输入值L_x,并通过第一补偿公式获取每种原色下每个灰阶输入值L_x对应的灰阶输出值L_y,以构成第二显示区,例如副显示屏121的第二显示区110b灰阶集合gamma_b(如图12所示)。从而当副显示屏121进行显示时,AP可以利用灰阶集合gamma_b通过DDIC20向副显示屏121提供灰阶值。
接下来,上述DDIC20,可以根据主显示屏120的第一显示区110a的灰阶查找表中的灰阶输入值L_x,驱动第一显示区110a进行显示。
此外,该DDIC20,还可以根据灰阶输入值L_x,从副显示屏121的第二显示区110b的灰阶查找表获取与上述灰阶输入值L_x相配的灰阶输出值L_y,并根据灰阶输出值L_y驱动第二显示区110b进行显示。
由上述可知,由于第一显示区110a显示灰阶输入值L_x,例如灰阶值255时画面的亮度和颜色,与第二显示区110b显示与上述灰阶输入值L_x相配的灰阶输出值L_y,例如灰阶值253时画面的亮度和颜色可以相同,或者近似相同。从而通过降低使用时间较短的第二显示区110b的灰阶,达到对第一显示区110a进行老化补偿的目的,使得使用时间不同的第一显示区110a和第二显示区110b的显示效果相同,或近似相同。
同理,当显示屏10具有弯折屏122时,例如执行上述S301和S302后获取的第一显示区110a的各原色中,红色衰减比coef1=0.96。弯折屏122的第三显示区110c的各原色中,红色衰减比coef2=0.99。
此时,当灰阶输入值L_x=255时,根据上述第一补偿公式,可以获取灰阶输出值L_y=255*(0.96/0.99) (1/2.2)=251。在此情况下,第一显示区110a显示灰阶值255时画面的亮度和颜色,与第三显示区110c显示灰阶值253时画面的亮度和颜色可以相同,或 者近似相同。
在此情况下,可以将第一显示区110a的灰阶查找表中每种原色的0~255个灰阶值,逐个作为上述灰阶输入值L_x,并通过第一补偿公式获取每种原色下每个灰阶输入值L_x对应的灰阶输出值L_y,以构成弯折屏122的第三显示区110c灰阶集合gamma_c(如图12所示)。从而当弯折屏122进行显示时,AP可以利用灰阶集合gamma__c通过DDIC20向弯折屏122提供灰阶值。
综上所述,显示屏老化补偿电路30的补偿电路303以主显示屏120的第一显示区110a为参考,使得副显示屏121和弯折屏122可以从而各自的灰阶集合中获取与主显示屏120显示的灰阶值满足上述第一补偿公式的灰阶值,从而使得副显示屏121和弯折屏122采用各自的灰阶查找表进行显示时,能够与主显示屏120显示图像的亮度和颜色接近一致。
综上所述,本申请实施例提供的老化补偿方法,通过获取折叠屏中主显示屏120的第一显示区110a、副显示屏121的第二显示区110b,以及弯折屏122的第三显示区110c的显示数据,通过老化试验,结合老化公式和老化曲线获取每个显示区中,各原色的衰减比,并结合温度因素对衰减比进行修正。
然后,根据上述衰减比,以主显示屏120为参考,获取副显示屏121和弯折屏122各自的灰阶集合c,使得主显示屏120各原色中每个原色对应的一个灰阶值,均能够在副显示屏121和弯折屏122各自的灰阶集合c中,找到通过衰减比修正后的灰阶值,以输出至DDIC20控制副显示屏121和弯折屏122根据各自的灰阶集合c中的灰阶值进行显示,使得副显示屏121、弯折屏122与主显示屏120显示图像的亮度和颜色接近一致。达到减小外折式显示器中,副显示屏121、弯折屏122与主显示屏120显示效果上存在的差异。
此外,上述方法不仅仅使用于上述具有主显示屏120、副显示屏121以及弯折屏122的三折式折叠屏,还可以适用于三折以上的折叠屏,各个显示区110的补偿方式同上所述。此处不再一一赘述。
方式二
本示例中,上述显示屏老化补偿电路30的补偿电路303利用DDIC20内的demura查找表,执行上述S103。
需要说明的是,本申请实施例中,“demura”中“mura”表示“不均匀”。“de”表示“去除”。因此“demura”为“去除不均匀”的含义。
具体的,上述S103包括:
首先,如图13所示,显示屏老化补偿电路30的补偿电路303可以获取DDIC20中demura查找表中的demura初始数据。
其中,在本申请的一些实施例中,上述demura初始数据包括多个demura补偿区,以及与每个demura补偿区对应的灰阶输入值L_x。或者,在本申请的另一些实施例中,上述demura初始数据还包括demura补偿系数a和demura偏移量b。
此外,上述主显示屏120的第一显示区110a,如图14所示,包括至少一个上述demura补偿区40。同理,副显示屏121的第二显示区110b,或者弯折屏122的第三显示区110c,包括至少一个上述demura补偿区40。
接下来,显示屏老化补偿电路30的补偿电路303具体用于获取每个灰阶输入值L_x对应的灰阶输出值L_y,多个灰阶输出值L_y,以构成上述demura补偿区40的灰阶查找表。在本申请的一些实施例中,显示屏老化补偿电路30的补偿电路303可以根据第二补偿公式L_y=(a*sqrt(coef_d))*L_x+b,获取每个灰阶输入值L_x对应的灰阶输出值L_y。
在电子设备01包括上述显示驱动电路,例如上述DDIC20时,该DDIC20可以与显示屏老化补偿电路30耦接。在此情况下,上述灰阶查找表可以使得DDIC20能够调用显示区110中各个demura补偿区40的灰阶查找表,并驱动显示屏10的显示区110进行显示。
其中,coef_d为demura补偿区的各原色的衰减比,demura补偿区40的各原色的衰减比与该demura补偿区40所在的,显示区110的同一原色的衰减比相同。
例如,执行上述S301和S302后获取的第一显示区110a的各原色中,红色衰减比coef1=0.96。此时,该第一显示区110a中各个demura补偿区40的红色衰减比coef_d_R=coef1=0.96。
接下来,当通过上述方式获取了该第一显示区110a中各个demura补偿区40的灰阶查找表后,上述DDIC20可以根据第一显示区110a内,各个demura补偿区40的灰阶查找表中的灰阶输出值L_y,驱动该第一显示区110a进行显示。由于第一显示区110a中的各个demura补偿区40是根据经过第一显示区110a的衰减比修正过的灰阶输出值L_y进行显示,使得第一显示区110a实际显示的亮度和颜色与其衰减比相匹配,从而可以对该第一显示区110a的老化进行补偿。
同理,执行上述S301和S302后获取的副显示屏121的第二显示区110b的各原色中,红色衰减比coef2=0.98。该第二显示区110b中各个demura补偿区40的红色衰减比coef_d_R=coef2=0.98。
接下来,当通过上述方式获取了该第二显示区110b中各个demura补偿区40的灰阶查找表后,上述DDIC20可以根据第二显示区110b内,各个demura补偿区40的灰阶查找表中的灰阶输出值L_y,驱动该第二显示区110b进行显示。
同理,执行上述S301和S302后获取的弯折屏122的第三显示区110c的各原色中,红色衰减比coef2=0.99。该弯折屏122中各个demura补偿区40的红色衰减比coef_d_R=coef2=0.99。
接下来,当通过上述方式获取了该第三显示区110c中各个demura补偿区40的灰阶查找表后,上述DDIC20可以根据第三显示区110c内,各个demura补偿区40的灰阶查找表中的灰阶输出值L_y,驱动该第三显示区110c进行显示。
需要要说明的是,灰阶输出值L_y与DDIC20向显示屏提供的数据电压Vdata相关,demura补偿区的各原色的衰减比coef_d与流过亚像素21中的OLED器件的驱动电流I相关。
此外,计算驱动电流I时,该驱动电流I与输入至亚像素21的像素电路201中的数据电压Vdata的平方相关。因此,在衰减比coef_d对demura初始数据进行修复时,demura初始数据中的demura补偿系数a需要乘以sqrt(coef_d),而不是直接与衰减比coef_d相乘。
最后,如图13所示,显示屏老化补偿电路30的补偿电路303将各个demura补偿区40的灰阶查找表写入至DDIC20中,从而使得DDIC20能够根据各个demura补偿区40的灰阶查找表分别驱动每个demura补偿区40进行显示。
由上述可知,本示例与示例一的不同之处在于,根据已经获取的各个显示区110中,各原色的衰减比,与由DDIC端读取到的demura初始数据进行融合,以对各个显示区110内的每个demura补偿区40的灰阶查找表中的灰阶值进行修正,以达到减小折叠显示器中,副显示屏121、弯折屏122与主显示屏120显示效果上存在差异的目的。
此外,主显示屏120的第一显示区110a、副显示屏121的第二显示区110b、弯折屏122的第三显示区110c,各自包括至少一个上述demura补偿区40。因此每个显示区可以进一步划分成面积更小的demura补偿区40进行老化补偿,提高了老化补偿的精度。
本申请实施例提供一种电子设备,该计算机设备包括存储器、处理器。上述存储器上存储有可在处理器上运行的计算机程序,该处理器执行计算机程序时实现如上所述的方法。
上述电子设备可以包括至少一个处理器。多个处理器可以是分立的器件,也集成于同一个芯片,例如SoC上。
此外,本申请实施例提供一种计算机可读介质,其存储有计算机程序。该计算机程序被处理器执行时实现如如上所述的方法。
存储器可以是只读存储器(read-only memory,ROM)或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器(random access memory,RAM)或者可存储信息和指令的其他类型的动态存储设备,也可以是电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory,EEPROM),或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。存储器可以是独立存在,通过通信总线与处理器相连接。存储器也可以和处理器集成在一起。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时,可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机执行指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输。
由上述可知,示例一、示例二的老化补偿方案中,均可以采用软件程序结合硬件,例如上述显示屏老化补偿电路30中至少一部分,例如上述数据统计电路301、补偿电路303可以设置于SOC上,例如SOC中的AP上,并通过将具有数据统计电路301、补偿电路303的AP与DDIC20耦接的方式实现。或者,上述数据统计电路301、补偿电路303可以设置于显示子系统(display subsystem,DSS)中,通过将DSS与DDIC20耦接的方式实现。从而可以快速适配不同厂商的屏幕。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何在本申请揭露的技术范围内的变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。

Claims (26)

  1. 一种显示屏的老化补偿方法,其特征在于,所述显示屏包括至少一个显示区;所述显示屏的老化补偿方法包括:
    获取每个所述显示区的显示数据;
    其中,所述显示数据包括显示区的使用时间t、获取所述显示数据之前,各原色的灰阶最大值Lev_max、在所述使用时间t内,三原色各自的各原色的灰阶均值Lev;所述使用时间为所述显示屏开机后,所述显示区的累积亮屏时间;
    根据所述显示数据获取所述显示区的各原色的衰减比;
    根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿。
  2. 根据权利要求1所述的显示屏的老化补偿方法,其特征在于,所述显示数据还包括获取所述显示数据之前,所述显示区的亮度最大值DBV_max、在所述使用时间t内,所述显示区的亮度均值DBV。
  3. 根据权利要求2所述的显示屏的老化补偿方法,其特征在于,所述根据所述显示数据获取所述显示区的各原色的衰减比包括:
    根据所述显示数据,获取修正后的老化公式:
    Figure PCTCN2020112892-appb-100001
    其中,coef为显示区的各原色的衰减比;γ为显示屏的伽玛值;τ、k、β为常数;
    根据所述显示区中各原色的老化模型分别获取各原色对应的常数τ、k、β;
    根据每个原色对应的常数τ、k、β以及修正后的所述老化公式,获取所述显示区的各原色中每个原色的衰减比coef。
  4. 根据权利要求1所述的显示屏的老化补偿方法,其特征在于,所述根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿之前,所述方法还包括:
    在至少两次获取所述显示数据的采样周期P内,分别获取所述显示区的温度值;每个温度值对应同一所述采样周期P内获取的所述显示区的各原色的衰减比;
    结合所述显示区的当前温度值,将不同温度值分别对应的同一原色的衰减比进行加权平均,获取经过温度值修正后的,所述显示区的各原色的衰减比。
  5. 根据权利要求4所述的显示屏的老化补偿方法,其特征在于,相邻两次用于采集温度和显示数据的所述采样周期之间的间隔,大于或等于相邻两次仅用于采集显示数据的所述采样周期之间的间隔。
  6. 根据权利要求1-5任一项所述的显示屏的老化补偿方法,其特征在于,所述显示屏包括第一显示区和第二显示区;所述第一显示区的使用时间大于所述第二显示区的使用时间。
  7. 根据权利要求6所述的显示屏的老化补偿方法,其特征在于,所述根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿包括:
    从所述第一显示区的灰阶查找表中,获取所述第一显示区的各原色的一个灰阶值作为灰阶输入值L_x;
    获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成所述第二显示区的灰阶查找表;
    根据所述第一显示区的灰阶查找表中的所述灰阶输入值L_x,驱动所述第一显示区进行显示;
    根据所述灰阶输入值L_x,从所述第二显示区的灰阶查找表获取与所述灰阶输入值L_x相配的所述灰阶输出值L_y,并根据所述灰阶输出值L_y驱动所述第二显示区进行显示。
  8. 根据权利要求7所述的显示屏的老化补偿方法,其特征在于,获取每个灰阶输入值L_x对应的灰阶输出值L_y包括:
    根据第一补偿公式L_y=L_x*(coef1/coef2) (1/γ),获取每个灰阶输入值L_x对应的灰阶输出值L_y;
    其中,coef1为第一显示区的各原色的衰减比;coef2为第二显示区的各原色的衰减比;r为显示屏的伽玛值;其中,coef1<coef2。
  9. 根据权利要求1-5任一项所述的显示屏的老化补偿方法,其特征在于,所述根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿包括:
    获取去除不均匀demura查找表中的demura初始数据;
    其中,所述demura初始数据包括多个demura补偿区,以及与每个所述demura补偿区对应的灰阶输入值L_x;所述显示区包括至少一个所述demura补偿区;
    获取每个灰阶输入值L_x对应的灰阶输出值L_y,以L_y构成所述demura补偿区的灰阶查找表;
    根据所述显示区内,各个demura补偿区的灰阶查找表中的灰阶输出值L_y,驱动所述显示区进行显示。
  10. 根据权利要求9所述的显示屏的老化补偿方法,其特征在于,所述demura初始数据还包括与每个所述demura补偿区对应的demura补偿系数a和demura偏移量b;
    获取每个灰阶输入值L_x对应的灰阶输出值L_y包括:
    根据第二补偿公式L_y=(a*sqrt(coef_d))*L_x+b,获取每个灰阶输入值L_x对应的灰阶输出值L_y;
    其中,coef_d为demura补偿区的各原色的衰减比,所述demura补偿区的各原色的衰减比为该demura补偿区所在的显示区中同一原色的衰减比。
  11. 根据权利要求2所述的显示屏的老化补偿方法,其特征在于,在所述使用时间t内,获取所述显示区的亮度均值DBV的方法包括:
    在获取所述显示数据时,获取所述显示区的当前亮度值DBV_c;
    在当前亮度值DBV_c为0的情况下,所述显示区的亮度均值DBV保持获取所述显示数据之前获取的亮度均值DBV_aver;
    或者,在当前亮度值DBV_c为非零值的情况下,所述显示区的亮度均值DBV满足公式:DBV=(t*60*DBV_aver+T*DBV_c)/(t*60+T);
    其中,使用时间t的单位为小时,采样周期P的单位为分钟。
  12. 一种电路系统,其特征在于,包括显示屏老化补偿电路,所述显示屏包括至 少一个显示区,所述显示屏老化补偿电路用于:
    获取每个所述显示区的显示数据;
    其中,所述显示数据包括显示区的使用时间t、获取所述显示数据之前,各原色的灰阶最大值Lev_max、在所述使用时间t内,各原色的灰阶均值Lev;所述使用时间为所述显示屏开机后,所述显示区的累积亮屏时间;
    根据所述显示数据获取所述显示区的各原色的衰减比;
    根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿。
  13. 根据权利要求12所述的电路系统,其特征在于,所述显示数据还包括获取所述显示数据之前,所述显示区的亮度最大值DBV_max、在所述使用时间t内,所述显示区的亮度均值DBV;
    根据所述显示数据获取所述显示区的各原色的衰减比,具体包括:
    根据所述显示数据,获取修正后的老化公式:
    Figure PCTCN2020112892-appb-100002
    其中,coef为显示区的各原色的衰减比;γ为显示屏的伽玛值;τ、k、β为常数;
    根据所述显示区中各原色的老化模型分别获取各原色对应的常数τ、k、β;
    根据每个原色对应的常数τ、k、β以及修正后的所述老化公式,获取所述显示区的各原色中每个原色的衰减比coef。
  14. 根据权利要求12所述的电路系统,其特征在于,根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿之前,显示屏老化补偿电路还用于:
    在至少两次获取所述显示数据的采样周期P内,分别获取所述显示区的温度值;每个温度值对应同一所述采样周期P内获取的所述显示区的各原色的衰减比;
    结合所述显示区的当前温度值,将不同温度值分别对应的同一原色的衰减比进行加权平均,获取经过温度值修正后的,所述显示区的各原色的衰减比。
  15. 根据权利要求12-14任一项所述的电路系统,其特征在于,所述显示屏包括第一显示区和第二显示区;所述第一显示区的使用时间大于所述第二显示区的使用时间;
    根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿,具体包括:
    从所述第一显示区的灰阶查找表中,获取所述第一显示区的各原色的一个灰阶值作为灰阶输入值L_x,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成所述第二显示区的灰阶查找表,以使得与所述显示屏耦接的显示驱动电路调用所述灰阶查找表,并驱动显示屏进行显示。
  16. 根据权利要求12-14任一项所述的电路系统,其特征在于,根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿,具体包括:
    获取demura查找表中的demura初始数据,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以L_y构成所述demura补偿区的灰阶查找表,以使得与所述显示屏耦接的显示驱动电路调用所述灰阶查找表,并驱动显示屏进行显示;
    其中,所述demura初始数据包括多个demura补偿区,以及与每个所述demura补偿区对应的灰阶输入值L_x;所述显示区包括至少一个所述demura补偿区。
  17. 一种电子设备,其特征在于,包括显示屏、显示屏老化补偿电路和显示驱动电路;所述显示屏包括至少一个显示区;所述显示屏老化补偿电路用于:
    获取每个所述显示区的显示数据;
    其中,所述显示数据包括显示区的使用时间t、获取所述显示数据之前,各原色的灰阶最大值Lev_max、在所述使用时间t内,各原色的灰阶均值Lev;所述使用时间为所述显示屏开机后,所述显示区的累积亮屏时间;
    根据所述显示数据获取所述显示区的各原色的衰减比;
    根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿;
    所述显示驱动电路与所述显示屏耦接,所述显示屏老化补偿电路与所述显示驱动电路耦接。
  18. 根据权利要求17所述的电子设备,其特征在于,所述显示数据还包括获取所述显示数据之前,所述显示区的亮度最大值DBV_max、在所述使用时间t内,所述显示区的亮度均值DBV;
    根据所述显示数据获取所述显示区的各原色的衰减比,具体包括:
    根据所述显示数据,获取修正后的老化公式:
    Figure PCTCN2020112892-appb-100003
    其中,coef为显示区的各原色的衰减比;γ为显示屏的伽玛值;τ、k、β为常数;
    根据所述显示区中各原色的老化模型分别获取各原色对应的常数τ、k、β;
    根据每个原色对应的常数τ、k、β以及修正后的所述老化公式,获取所述显示区的各原色中每个原色的衰减比coef。
  19. 根据权利要求17所述的电子设备,其特征在于,根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿之前,显示屏老化补偿电路还用于:
    在至少两次获取所述显示数据的采样周期P内,分别获取所述显示区的温度值;每个温度值对应同一所述采样周期P内获取的所述显示区的各原色的衰减比;
    结合所述显示区的当前温度值,将不同温度值分别对应的同一原色的衰减比进行加权平均,获取经过温度值修正后的,所述显示区的各原色的衰减比。
  20. 根据权利要求17-19任一项所述的电子设备,其特征在于,所述显示屏包括第一显示区和第二显示区;所述第一显示区的使用时间大于所述第二显示区的使用时间;
    根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿,具体包括:
    从所述第一显示区的灰阶查找表中,获取所述第一显示区的各原色的一个灰阶值作为灰阶输入值L_x,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以构成所述第二显示区的灰阶查找表;
    所述显示驱动电路用于调用所述第一显示区、所述第二显示区的灰阶查找表,并 驱动显示屏进行显示。
  21. 根据权利要求17-19任一项所述的电子设备,其特征在于,根据每个所述显示区的各原色的衰减比,对各个所述显示区进行老化补偿,具体包括:
    获取demura查找表中的demura初始数据,并获取每个灰阶输入值L_x对应的灰阶输出值L_y,以L_y构成所述demura补偿区的灰阶查找表;
    其中,所述demura初始数据包括多个demura补偿区,以及与每个所述demura补偿区对应的灰阶输入值L_x;所述显示区包括至少一个所述demura补偿区;
    所述显示驱动电路用于调用所述demura补偿区的灰阶查找表,并驱动显示屏进行显示。
  22. 根据权利要求17所述的电子设备,其特征在于,所述电子设备还包括片上系统,所述显示屏老化补偿电路的至少一部分设置于所述片上系统内。
  23. 根据权利要求17所述的电子设备,其特征在于,所述显示屏包括第一显示区和第二显示区;所述第一显示区的使用时间大于所述第二显示区的使用时间;
    所述显示屏包括主显示屏、位于所述主显示屏一侧的副显示屏;所述主显示屏的有效显示区为所述第一显示区;所述副显示屏的有效显示区为所述第二显示区;
    当所述副显示屏弯折至所述主显示屏的背面时,所述副显示屏的显示面远离所述主显示屏。
  24. 根据权利要求23所述的电子设备,其特征在于,所述显示屏还包括第三显示区;所述第一显示区的使用时间大于所述第三显示区的使用时间;
    所述显示屏还包括位于所述主显示屏和所述副显示屏之间的弯折屏;所述弯折屏用于当所述副显示屏弯折至所述主显示屏的背面时发生弯曲变形;所述弯折屏的有效显示区为所述第三显示区。
  25. 一种电子设备,其特征在于,包括存储器、处理器;所述存储器上存储有可在处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现如权利要求1-11任一项所述的方法。
  26. 一种计算机可读介质,其存储有计算机程序,其特征在于,所述计算机程序被处理器执行时实现如权利要求1-11任一项所述的方法。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114638904A (zh) * 2022-03-08 2022-06-17 深圳康荣电子有限公司 一种基于色彩过渡实现液晶拼接屏lcd画面补偿的色差系统及方法
WO2024055234A1 (en) * 2022-09-15 2024-03-21 Qualcomm Incorporated Oled anti-aging regional compensation

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112116894B (zh) * 2019-06-20 2021-12-28 华为技术有限公司 显示面板的亮度补偿方法及装置、显示面板、存储介质
CN110808006B (zh) * 2019-09-06 2021-01-15 华为技术有限公司 一种显示屏老化补偿方法、电路系统、电子设备
CN111599307B (zh) * 2020-06-09 2021-09-24 北京交通大学 Oled显示面板的像素补偿方法及信息处理装置
CN111681587A (zh) * 2020-06-15 2020-09-18 合肥维信诺科技有限公司 显示面板的驱动方法、装置及显示装置
CN111508379A (zh) * 2020-06-15 2020-08-07 合肥维信诺科技有限公司 可折叠显示面板及可折叠显示装置
CN111754935B (zh) * 2020-06-29 2021-08-27 合肥维信诺科技有限公司 显示面板的补偿方法、装置及显示装置
CN111783664B (zh) * 2020-06-30 2024-05-07 珠海格力电器股份有限公司 折叠屏的折痕补偿方法、装置、电子设备和存储介质
TWI740705B (zh) * 2020-11-05 2021-09-21 友達光電股份有限公司 顯示裝置
CN112289263B (zh) * 2020-11-16 2022-03-11 武汉天马微电子有限公司 一种像素补偿方法、像素补偿装置以及显示装置
CN114694599B (zh) * 2020-12-25 2024-04-09 海信视像科技股份有限公司 显示设备和mura处理方法
US11955074B2 (en) 2021-02-15 2024-04-09 Samsung Electronics Co., Ltd. Electronic device and method for calibrating image data in electronic device
CN113284458B (zh) * 2021-05-31 2022-08-23 昆山工研院新型平板显示技术中心有限公司 显示面板的灰阶补偿方法
CN113628575A (zh) * 2021-08-11 2021-11-09 昆山国显光电有限公司 显示面板的亮度补偿方法、亮度补偿装置及亮度补偿系统
CN115731868A (zh) * 2021-08-26 2023-03-03 华为技术有限公司 一种分区补偿方法及电子设备
US11721253B2 (en) * 2021-10-19 2023-08-08 Synaptics Incorporated Demura processing for a display panel having multiple regions with different pixel densities
CN116798327A (zh) * 2021-10-26 2023-09-22 深圳市华星光电半导体显示技术有限公司 显示面板老化测验方法
CN114283728B (zh) * 2021-12-29 2023-11-17 昆山国显光电有限公司 显示面板的补偿方法、装置及计算机可读存储介质
CN114842798B (zh) * 2022-05-13 2024-05-10 深圳市华星光电半导体显示技术有限公司 亮度补偿方法及装置、可读存储介质、显示装置
CN117916793A (zh) * 2022-06-30 2024-04-19 京东方科技集团股份有限公司 补偿装置及方法、显示装置及其工作方法、存储介质
CN115731861A (zh) * 2022-11-18 2023-03-03 武汉路特斯汽车有限公司 一种屏幕颜色调整方法、装置及终端

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103198790A (zh) * 2013-03-15 2013-07-10 向运明 一种自发光显示设备和修正显示单元亮度不一致的方法
CN103680407A (zh) * 2013-12-17 2014-03-26 青岛海信电器股份有限公司 稳定有机电致发光显示器亮度的方法、装置及系统
US20160379551A1 (en) * 2015-06-25 2016-12-29 Intel Corporation Wear compensation for a display
CN106531069A (zh) * 2016-12-29 2017-03-22 上海天马有机发光显示技术有限公司 一种控制芯片、控制方法、显示装置及控制主机
CN107134273A (zh) * 2017-07-17 2017-09-05 联想(北京)有限公司 亮度补偿方法、装置及终端
CN107274834A (zh) * 2017-08-08 2017-10-20 深圳市华星光电半导体显示技术有限公司 一种amoled显示面板亮度补偿方法及装置
CN110164398A (zh) * 2019-05-24 2019-08-23 京东方科技集团股份有限公司 一种显示亮度调节方法及系统
CN110808006A (zh) * 2019-09-06 2020-02-18 华为技术有限公司 一种显示屏老化补偿方法、电路系统、电子设备

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101315088B1 (ko) * 2005-10-20 2013-10-07 코닌클리케 필립스 엔.브이. 조명 장치
KR101972017B1 (ko) 2012-10-31 2019-04-25 삼성디스플레이 주식회사 표시장치, 열화 보상 장치 및 열화 보상 방법
CN104318893B (zh) * 2014-09-29 2019-02-22 青岛海信电器股份有限公司 一种消除静态图像显示区域残影缺陷的方法和系统
US9591720B2 (en) 2015-08-05 2017-03-07 Mitsubishi Electric Corporation LED display apparatus
US10424244B2 (en) * 2016-09-09 2019-09-24 Apple Inc. Display flicker reduction systems and methods
CN106935191B (zh) * 2017-03-31 2021-10-22 联想(北京)有限公司 显示控制方法及电子设备
CN107864342B (zh) * 2017-10-27 2020-04-17 深圳市瑞立视多媒体科技有限公司 图像亮度调节方法及装置
KR102387429B1 (ko) * 2017-12-18 2022-04-19 삼성디스플레이 주식회사 저계조 단색 영상 보상을 수행하는 표시 장치, 및 표시 장치의 구동 방법
CN109036277B (zh) 2018-09-27 2020-06-09 京东方科技集团股份有限公司 补偿方法及补偿装置、显示装置、显示方法及存储介质
CN109300434B (zh) * 2018-10-31 2021-01-15 上海天马微电子有限公司 显示装置及其视角色差的调整方法
CN109064995A (zh) * 2018-11-09 2018-12-21 重庆先进光电显示技术研究院 显示面板的亮度补偿方法、显示面板及亮度补偿装置
CN109461406B (zh) * 2018-12-17 2021-03-02 Oppo广东移动通信有限公司 显示方法、装置、电子设备及介质
CN109686303B (zh) * 2019-01-28 2021-09-17 厦门天马微电子有限公司 一种有机发光显示面板、有机发光显示装置及补偿方法
CN109584797B (zh) 2019-02-01 2020-11-24 京东方科技集团股份有限公司 显示面板的补偿方法、补偿系统和显示装置
CN113811941B (zh) * 2019-05-09 2024-03-12 云英谷科技股份有限公司 用于估计和补偿显示面板中的发光元件老化的方法和系统

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103198790A (zh) * 2013-03-15 2013-07-10 向运明 一种自发光显示设备和修正显示单元亮度不一致的方法
CN103680407A (zh) * 2013-12-17 2014-03-26 青岛海信电器股份有限公司 稳定有机电致发光显示器亮度的方法、装置及系统
US20160379551A1 (en) * 2015-06-25 2016-12-29 Intel Corporation Wear compensation for a display
CN106531069A (zh) * 2016-12-29 2017-03-22 上海天马有机发光显示技术有限公司 一种控制芯片、控制方法、显示装置及控制主机
CN107134273A (zh) * 2017-07-17 2017-09-05 联想(北京)有限公司 亮度补偿方法、装置及终端
CN107274834A (zh) * 2017-08-08 2017-10-20 深圳市华星光电半导体显示技术有限公司 一种amoled显示面板亮度补偿方法及装置
CN110164398A (zh) * 2019-05-24 2019-08-23 京东方科技集团股份有限公司 一种显示亮度调节方法及系统
CN110808006A (zh) * 2019-09-06 2020-02-18 华为技术有限公司 一种显示屏老化补偿方法、电路系统、电子设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4016511A4

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114638904A (zh) * 2022-03-08 2022-06-17 深圳康荣电子有限公司 一种基于色彩过渡实现液晶拼接屏lcd画面补偿的色差系统及方法
CN114638904B (zh) * 2022-03-08 2022-09-20 深圳康荣电子有限公司 一种基于色彩过渡实现液晶拼接屏lcd画面补偿的色差系统及方法
WO2024055234A1 (en) * 2022-09-15 2024-03-21 Qualcomm Incorporated Oled anti-aging regional compensation

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