CN113380173A - Display compensation method and device of display panel, display device and medium - Google Patents

Display compensation method and device of display panel, display device and medium Download PDF

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CN113380173A
CN113380173A CN202110636146.5A CN202110636146A CN113380173A CN 113380173 A CN113380173 A CN 113380173A CN 202110636146 A CN202110636146 A CN 202110636146A CN 113380173 A CN113380173 A CN 113380173A
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gray scale
refresh rate
control signal
display
display panel
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CN113380173B (en
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韩光光
王铁钢
姜海斌
张小宝
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The application discloses a display compensation method and device of a display panel, a display device and a medium. The method comprises the following steps: acquiring a reference duty ratio of a light-emitting control signal of the display panel under a reference refresh rate and a compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point of the display panel under a target refresh rate; and when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the compensation coefficient and the reference duty ratio. According to the embodiment of the application, the problem that the display panel flickers when being switched among different refresh rates can be solved.

Description

Display compensation method and device of display panel, display device and medium
Technical Field
The present application relates to the field of display technologies, and in particular, to a display compensation method and apparatus for a display panel, a display apparatus, and a medium.
Background
The refresh rate is an important parameter for characterizing the stability of the displayed image of the display device. Current display devices can switch between different refresh rates. For example, when a user views text through a display device, the display device may operate at a relatively low refresh rate (e.g., 60 Hz)). As another example, when a user is watching an animation or playing a game versus combat through the display device, the display device may operate at a relatively high refresh rate (e.g., 144 Hz). However, there is a problem with flashing the display panel when it is switched between different refresh rates.
Disclosure of Invention
The embodiment of the application provides a display compensation method and device of a display panel, a display device and a medium, which can solve the problem that a display panel flickers when being switched among different refresh rates.
In a first aspect, an embodiment of the present application provides a display compensation method for a display panel, including: acquiring a reference duty ratio of a light-emitting control signal of the display panel under a reference refresh rate and a compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point of the display panel under a target refresh rate;
and when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the compensation coefficient and the reference duty ratio.
In a possible implementation manner of the first aspect, the calculation formula of the compensation coefficient corresponding to any gray-scale binding point is as follows:
Figure BDA0003105303860000011
wherein EM _ CnRepresents the compensation coefficient corresponding to the gray level binding point n,
Figure BDA0003105303860000012
indicating that the gray scale tie point n is at the reference refresh rate and the duty ratio of the light emission control signal is the luminance value of the reference duty ratio,
Figure BDA0003105303860000021
and the brightness value which represents that the gray scale binding point n is at the target refresh rate and the duty ratio of the light-emitting control signal is the reference duty ratio.
In a possible implementation manner of the first aspect, the compensation coefficient corresponding to the gray level between two adjacent gray level bindings is calculated by the following formula:
Figure BDA0003105303860000022
wherein EM _ CgCompensation coefficients, EM _ C, representing gray level correspondence between two gray level bindingsn+1Represents the compensation coefficient corresponding to the (n + 1) th gray-scale binding point, EM _ CnAnd the compensation coefficient corresponding to the nth gray scale binding point is represented, the delta G represents the gray scale difference value between the (n + 1) th gray scale binding point and the nth gray scale binding point, the G represents a gray scale value between the (n + 1) th gray scale binding point and the nth gray scale binding point, and the n represents a gray scale value corresponding to the nth gray scale binding point.
In a possible implementation manner of the first aspect, in a case that the picture displayed by the display panel at the target refresh rate includes a plurality of gray levels, the method further includes:
dividing a display area of the display panel into m sub-display areas, wherein m is a positive number greater than or equal to 2;
and regarding any one of the m sub-display areas, taking the compensation coefficient corresponding to the average value of each gray scale in the sub-display area as the compensation coefficient corresponding to the sub-display area.
In one possible implementation of the first aspect, the m sub-display sections are arranged along an extending direction of the data lines of the display panel.
In a possible implementation manner of the first aspect, the method further includes:
acquiring data signal parameters corresponding to each gray scale binding point of the display panel under a reference refresh rate, wherein the actual display parameters of the display panel under the data signal parameters meet the display parameter requirements;
when the display panel displays at the target refresh rate, the data signal parameter corresponding to the target refresh rate is set to be the same as the data signal parameter corresponding to the reference refresh rate under the same gray scale binding point.
In a possible implementation manner of the first aspect, a duty ratio of the light-emitting control signal is a ratio of a duration of the light-emitting control signal at an effective level within a frame duration to a frame duration, or the duty ratio of the light-emitting control signal is a ratio of a duration of the light-emitting control signal at an effective level within a frame duration to a duration of the light-emitting control signal at an ineffective level within a frame duration, where, when a reference refresh rate is less than a target refresh rate, a compensation coefficient corresponding to a gray scale binding point greater than or equal to a preset gray scale value is less than 1, a compensation coefficient corresponding to a gray scale binding point less than the preset gray scale value is greater than 1, and, when the reference refresh rate is greater than the target refresh rate, a compensation coefficient corresponding to a gray scale binding point greater than or equal to the preset gray scale value is greater than 1, and a compensation coefficient corresponding to a gray scale binding point less than the preset gray scale value is less than 1;
or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of one frame, or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of the light-emitting control signal at the valid level within the duration of one frame, when the reference refresh rate is less than the target refresh rate, the compensation coefficient corresponding to the gray scale binding point greater than or equal to the preset gray scale value is greater than 1, and the compensation coefficient corresponding to the gray scale binding point less than the preset gray scale value is less than 1, and when the reference refresh rate is greater than the target refresh rate, the compensation coefficient corresponding to the gray scale binding point greater than or equal to the preset gray scale value is less than 1, and the compensation coefficient corresponding to the gray scale binding point less than the preset gray scale value is greater than 1.
In a second aspect, an embodiment of the present application provides a display compensation apparatus for a display panel, including:
the data acquisition module is used for acquiring the reference duty ratio of the light-emitting control signal corresponding to each gray scale binding point of the display panel under the reference refresh rate and the compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point of the display panel under the target refresh rate;
and the compensation module is used for compensating the displayed picture according to the product of the compensation coefficient and the reference duty ratio when the display panel displays at the target refresh rate.
In a third aspect, an embodiment of the present application provides a display device, which includes a processor, a memory, and a program or an instruction stored on the memory and executable on the processor, where the program or the instruction, when executed by the processor, implements the steps of the display compensation method for the display panel according to the embodiment of the first aspect.
In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program or instructions are stored, where the program or instructions, when executed by a processor, implement the steps of the display compensation method for a display panel according to the embodiment of the first aspect.
According to the embodiment of the application, on one hand, a plurality of refresh rates of the display panel do not share the same duty ratio of the light-emitting control signal, but the product of the reference duty ratio of the light-emitting control signal of the display panel at the reference refresh rate and the compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point at the target refresh rate is used, when the display panel is displayed at the target refresh rate, the displayed picture is compensated according to the product, so that the display panel can use different duty ratios of the light-emitting control signal when being displayed at different refresh rates, and the problem of the occurrence of the flicker when the display panel is switched between different refresh rates is solved by adjusting the light-emitting duration of the light-emitting elements of the display panel. In addition, the duty ratio of the light-emitting control signal under each refresh rate is compensated, so that gamma debugging does not need to be carried out on each refresh rate, the time required by gamma debugging can be reduced, the number of OTP groups is reduced, and the production efficiency is improved.
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Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a flowchart illustrating a display compensation method for a display panel according to an embodiment of the present disclosure;
FIG. 2 is a diagram illustrating the result of a pixel circuit of a display panel according to an embodiment of the present application;
FIG. 3 shows a timing diagram of FIG. 2;
FIG. 4 is a diagram illustrating gray level binding and compensation coefficients according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a display panel according to another embodiment of the present application;
FIG. 7 is a schematic structural diagram of a display compensation apparatus of a display panel according to an embodiment of the present disclosure;
fig. 8 illustrates a hardware structure diagram of a display device according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Before explaining the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically explains the problems existing in the prior art:
as described above, with the development of display technologies, the kinds of screen refresh rates that can be supported by display panels are increasing. For example, the display module can support a screen refresh rate of 60Hz (i.e. Hz), 90Hz, 120Hz, 144Hz, etc. In order to solve the problem of screen flashing when the display panel is switched between different refresh rates, Gamma (Gamma) debugging is performed on each refresh rate in the related art, however, although the problem of screen flashing can be improved by this method, the time for Gamma debugging is lengthened and the number of sets of One Time Program (OTP) is increased.
Based on this, embodiments of a display compensation method for a display panel, a display compensation method apparatus for a display panel, a display apparatus and a computer readable storage medium are described below with reference to the accompanying drawings.
The embodiment of the application provides a display compensation method of a display panel, which can be executed by a display compensation device or a display device of the display panel. Fig. 1 is a flowchart illustrating a display compensation method of a display panel according to an embodiment of the present application. As shown in fig. 1, the display compensation method of the display panel provided in the embodiment of the present application includes steps 110 to 120.
And 110, acquiring a reference duty ratio of a light-emitting control signal of the display panel at a reference refresh rate and a compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point of the display panel at a target refresh rate.
And 120, when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the compensation coefficient and the reference duty ratio.
Illustratively, the screen refresh rates supported by the display panel may include a reference refresh rate and a target refresh rate. The reference refresh rate is not equal to the target refresh rate. The reference refresh rate and the target refresh rate are relative concepts of two refresh rates, and do not mean that the display panel supports only two refresh rates. For example, the display panel supports four screen refresh rates, 60Hz, 90Hz, 120Hz, and 144Hz, respectively. One of the refresh rates of 60Hz, 90Hz, 120Hz and 144Hz may be used as a reference refresh rate, and any other refresh rate may be used as a target refresh rate. For example, 60Hz is the reference refresh rate, and the target refresh rate may be any one of 90Hz, 120Hz, and 144 Hz.
It is understood that the light emission control signal (EMIT) is a signal for controlling the light emitting time period of the light emitting elements of the display panel. As shown in fig. 2, the pixel circuit of the display panel includes transistors T1 to T7, a storage capacitor Cst, and a light emitting element D as an example, where Vdata represents a data signal, SCAN1 represents a first SCAN signal, SCAN2 represents a second SCAN signal, VREF represents a reference signal, VREF may also be referred to as a reset voltage signal, VDD represents a positive signal, VSS represents a negative voltage signal, the reference signal VREF may be a negative voltage signal, and the SCAN signal and the light emission control signal EMIT are pulse signals. The connection relationship of the elements of the pixel circuit is shown in fig. 2, and will not be described in detail again. As shown in fig. 3, the operation process of the pixel circuit may include a reset phase, a data writing phase, and a light emitting phase. Taking the transistors of the pixel circuit as P-type transistors as an example, the light-emission control signal EMIT is at a high level and the light-emitting element D does not EMIT light in the reset phase and the data write phase, and the light-emission control signal EMIT is at a low level and the light-emitting element D EMITs light in the light-emission phase.
The active level of the emission control signal EMIT may be understood as a level controlling the emission of light of the light emitting element D. It is understood that, in the case where the transistor is a P-type transistor, the active level of the emission control signal EMIT is a low level and the inactive level of the emission control signal EMIT is a high level; in the case where the transistor is an N-type transistor, the active level of the emission control signal EMIT is high, and the inactive level of the emission control signal EMIT is low.
For example, the duty ratio of the emission control signal EMIT may be a ratio of a period in which the emission control signal EMIT is at an active level for a period of one frame to a period of one frame, or the duty ratio of the emission control signal EMIT may be a ratio of a period in which the emission control signal EMIT is at an active level for a period of one frame to a period in which the emission control signal EMIT is at an inactive level for a period of one frame, or the duty ratio of the emission control signal EMIT may be a ratio of a period in which the emission control signal EMIT is at an inactive level for a period of one frame to a period in which the emission control signal EMIT is at an active level for a period of one frame. It is to be understood that, no matter the duty ratio of the emission control signal EMIT is defined as any one of the above, when the duty ratio of the emission control signal EMIT is changed, the active level duration of the emission control signal EMIT within one frame duration is changed, that is, the emission duration of the light emitting elements of the display panel within one frame duration is changed. The light emission time period of the light emitting element is correlated with the luminance, and it is understood that the longer the light emission time period of the light emitting element is, the larger the luminance is, and conversely, the shorter the light emission time period of the light emitting element is, the smaller the luminance is.
It can be understood that, in the case that the duty ratio of the emission control signal EMIT is the ratio of the duration in which the emission control signal EMIT is at the active level within the duration of one frame to the duration of one frame, or the duty ratio of the emission control signal EMIT is the ratio of the duration in which the emission control signal EMIT is at the active level within the duration of one frame to the duration in which the emission control signal EMIT is at the inactive level within the duration of one frame, the larger the duty ratio of the emission control signal EMIT is, the longer the emission duration of the light-emitting element is, the larger the luminance is, the smaller the duty ratio of the emission control signal EMIT is, the shorter the emission duration of the light-emitting element is, and the smaller the luminance is. When the duty ratio of the emission control signal EMIT is the ratio of the duration of the emission control signal EMIT at the inactive level within the duration of one frame to the duration of one frame, or the duty ratio of the emission control signal EMIT is the ratio of the duration of the emission control signal EMIT at the inactive level within the duration of one frame to the duration of the emission control signal EMIT at the active level within the duration of one frame, the larger the duty ratio of the emission control signal EMIT is, the shorter the emission duration of the light emitting element is, the smaller the luminance is, and the smaller the duty ratio of the emission control signal EMIT is, the longer the emission duration of the light emitting element is, and the larger the luminance is.
Based on this, the display compensation method for the display panel provided in the embodiment of the present application is to adjust the display brightness at each refresh rate by adjusting the duty ratio of the light-emitting control signal corresponding to each refresh rate when the display panel is switched between different refresh rates, so as to improve the problem of screen flashing.
For example, the reference duty ratio of the light emission control signal of the display panel at the reference refresh rate may be a duty ratio of a light emission control signal common to the display panel. For example, the reference duty ratio of the light emission control signal of the display panel at the reference refresh rate may be 50%, 60%, or the like. It is understood that, in the case where the reference duty ratio of the light emission control signal is the ratio of the period in which the light emission control signal is at the active level to the period of one frame, the duty ratio of the light emission control signal is a value greater than 0 and less than 1 at both the reference refresh rate and the target refresh rate.
For example, the reference duty ratios of the light emission control signals corresponding to the respective gray scales of the display panel at the reference refresh rate may be the same value.
Illustratively, the gray scale binding points are selected gray scale debugging points in the process of determining the reference compensation parameters, and each gray scale binding point corresponds to one gray scale. The number of gray level bindings is not limited herein. For example, of 256 gray levels of 0 to 255, 20 to 40 gray levels may be selected at intervals as gray level tie points. For example, the gray level binding points may include 32 gray levels, 64 gray levels, 96 gray levels, 128 gray levels, 160 gray levels, 192 gray levels, 224 gray levels, 255 gray levels, and the like.
For example, the specific value of the compensation coefficient of the light emitting control signal corresponding to each gray scale binding point of the display panel at the target refresh rate may be different. When the gray scale corresponding to the gray scale binding point is 255, the compensation coefficient of the light-emitting control signal under the target refresh rate is EM _1, when the gray scale corresponding to the gray scale binding point is 196, the compensation coefficient of the light-emitting control signal under the target refresh rate is EM _2, when the gray scale corresponding to the gray scale binding point is 150, the compensation coefficient of the light-emitting control signal under the target refresh rate is EM _3, and EM _1, EM _2 and EM _3 can be unequal.
For example, the product of the compensation coefficient and the reference duty ratio may be used as a target duty ratio of the light-emitting control signal corresponding to each gray scale binding point of the display panel at the target refresh rate, and then when the display panel displays at the target refresh rate, the duty ratio of the light-emitting control signal is controlled to be the target duty ratio, so as to compensate the displayed picture by changing the light-emitting duration of the light-emitting element. It is understood that when the display panel displays at the reference refresh rate, the duty ratio of the light emission control signal is directly controlled as the reference duty ratio.
According to the display compensation method of the display panel provided by the embodiment of the application, on one hand, a plurality of refresh rates of the display panel do not share the same duty ratio of the light-emitting control signal, but according to the product of the reference duty ratio of the light-emitting control signal of the display panel at the reference refresh rate and the compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point at the target refresh rate, when the display panel is displayed at the target refresh rate, a displayed picture is compensated according to the product, so that the display panel can use different duty ratios of the light-emitting control signal when being displayed at different refresh rates, and the problem of the occurrence of the flicker when the display panel is switched between different refresh rates is solved by adjusting the light-emitting duration of the light-emitting elements of the display panel. In addition, the duty ratio of the light-emitting control signal under each refresh rate is compensated, so that gamma debugging does not need to be carried out on each refresh rate, the time required by gamma debugging can be reduced, the number of OTP groups is reduced, and the production efficiency is improved.
In some optional embodiments, before step 110, a reference duty ratio of the light emission control signal of the display panel at the reference refresh rate and a compensation coefficient of the light emission control signal corresponding to each gray-scale binding point of the display panel at the target refresh rate may be determined, and the determined reference duty ratio of the light emission control signal and the determined compensation coefficient of the light emission control signal may be stored in a storage module of the display panel.
For example, the specific step of determining the reference duty ratio of the light emitting control signal of the display panel at the reference refresh rate may include: setting an initial reference duty ratio of the light-emitting control signal, and judging whether actual display parameters of the display panel meet the requirements of the display parameters when the display panel displays the gray scale binding point picture at the initial reference duty ratio; if the gray scale binding point picture does not meet the requirement, the initial reference duty ratio is adjusted until the actual display parameters of the display panel displaying the gray scale binding point picture at the reference refresh rate meet the requirement of the display parameters under the adjusted reference duty ratio, and the adjusted reference duty ratio can be used as the final corresponding reference duty ratio of the reference refresh rate.
Of course, the reference duty ratio of the light emission control signal of the display panel at the reference refresh rate may be directly determined empirically.
For example, the reference duty ratios of the light emission control signals corresponding to the respective gray scales of the sub-pixels of the display panel at the reference refresh rate may be the same value, that is, the reference duty ratios of the light emission control signals corresponding to any gray scale picture displayed at the reference refresh rate of the display panel may be the same.
For example, the compensation coefficient of the light emission control signal corresponding to each gray scale binding point of the target refresh rate may be directly set according to experience. For example, when the target refresh rate is greater than the reference refresh rate, the compensation coefficient of the emission control signal corresponding to the corresponding gray-scale binding point with a higher gray-scale value may be less than 1, and the compensation coefficient of the emission control signal corresponding to the corresponding gray-scale binding point with a lower gray-scale value may be greater than 1. The foregoing are merely some examples and are not intended to limit the present disclosure.
In some alternative embodiments, the display panel may be gamma debugged only at a baseline refresh rate. Specifically, the display compensation method of the display panel provided in the embodiment of the present application may further include: acquiring data signal parameters corresponding to each gray scale binding point of the display panel under a reference refresh rate, wherein the actual display parameters of the display panel under the data signal parameters meet the display parameter requirements; when the display panel displays at the target refresh rate, the data signal parameter corresponding to the target refresh rate is set to be the same as the data signal parameter corresponding to the reference refresh rate under the same gray scale binding point.
For example, before the data signal parameters corresponding to the gray scale binding points of the display panel at the reference refresh rate are obtained, gamma debugging may be performed on the gray scale binding points of the display panel at the reference refresh rate to obtain the data signal parameters corresponding to the gray scale binding points of the display panel at the reference refresh rate, and the obtained data signal parameters corresponding to the gray scale binding points are stored in the display module of the display panel.
For example, for any gray level binding point of the display panel at the reference refresh rate, the step of gamma debugging may include: setting initial data signal parameters corresponding to the gray scale binding points of the display panel under the reference refresh rate, and judging whether actual display parameters of the display panel meet the requirements of the display parameters when the display panel displays the gray scale binding point pictures according to the initial data signal parameters; if the gray scale binding point is not matched with the standard refresh rate, adjusting the initial data signal parameters until the actual display parameters of the display panel displaying the gray scale binding point pictures at the standard refresh rate under the adjusted initial data signal parameters meet the requirements of the display parameters, and taking the adjusted initial data signal parameters as the final corresponding data signal parameters of the gray scale binding point of the display panel under the standard refresh rate.
The actual display parameter meets the display parameter requirement, and may be that the actual display parameter is equal to the display parameter requirement, or that the difference between the actual display parameter and the display parameter requirement is within a preset range, and in the preset range, human eyes cannot recognize the display difference.
Illustratively, the data signal parameter may comprise a data voltage.
According to the embodiment of the application, the gamma debugging of the display panel can be carried out under the standard refresh rate without carrying out the gamma debugging on the display panel under the target refresh rate, and the target refresh rate can share the data signal parameters corresponding to the standard refresh rate under the same gray scale binding point, so that the gamma debugging time can be reduced, the number of OTP groups can be reduced, and the production efficiency can be improved.
Because the duration of each frame is different under different refresh rates, the grid electrode leakage degree of a driving transistor in a pixel circuit also has difference, even if the target refresh rate shares the data signal parameter corresponding to the reference refresh rate under the same gray scale binding point, the brightness difference still exists when the same gray scale binding point sheet is displayed at different refresh rates.
In some alternative embodiments, the compensation coefficients of the light emitting control signals corresponding to the gray-scale binding points may be determined according to the brightness difference between different refresh rates. Specifically, the compensation coefficient corresponding to any gray-scale binding point can be determined according to the following formula (1):
Figure BDA0003105303860000101
wherein EM _ CnRepresents the compensation coefficient corresponding to the gray level binding point n,
Figure BDA0003105303860000102
indicating that the gray scale tie point n is at the reference refresh rate and the duty ratio of the light emission control signal is the luminance value of the reference duty ratio,
Figure BDA0003105303860000103
and the brightness value which represents that the gray scale binding point n is at the target refresh rate and the duty ratio of the light-emitting control signal is the reference duty ratio.
For example, taking the gray scale binding point n as the 255 gray scale as an example, the display panel may display a white picture of the 255 gray scale at a reference refresh rate, and then the brightness acquisition device may acquire the brightness
Figure BDA0003105303860000111
Then the display panel displays a white picture with 255 gray scales at a target refresh rate, and then brightness is acquired by utilizing brightness acquisition equipment
Figure BDA0003105303860000112
The compensation coefficient corresponding to the gray level tie point 255
Figure BDA0003105303860000113
Figure BDA0003105303860000114
It can be understood that the duty ratios of the light emitting control signals used by the display panel to display the 255-gray-scale white frame at the reference refresh rate and the target refresh rate are both the reference duty ratio, and the data voltages used by the display panel to display the 255-gray-scale white frame at the reference refresh rate and the target refresh rate are the same.
For the compensation coefficient corresponding to any other gray scale binding point, the above gray scale binding point can be 255 gray scales, and details are not described herein.
In the embodiment of the application, the formula (1) can be obtained according to the actual display condition of the display panel under different refresh rates, so that the compensation coefficient corresponding to each gray scale binding point under the target refresh rate is accurately determined according to the formula (1).
In some alternative embodiments, before step 110, the compensation coefficients corresponding to the gray-scale binding points determined according to the above formula (1) may be stored in a storage module of the display panel.
Taking the display panel as an 8-bit display panel as an example, in 256 gray scales from 0 to 255, the gray scale tie points are part of the 256 gray scales, and the compensation coefficients corresponding to the gray scales other than the gray scale tie points can be calculated by using a linear interpolation method.
For example, the compensation coefficient corresponding to the gray level between two adjacent gray level binding points can be calculated according to equation (2):
Figure BDA0003105303860000115
wherein EM _ CgCompensation coefficients, EM _ C, representing gray level correspondence between two gray level bindingsn+1Represents the compensation coefficient corresponding to the (n + 1) th gray-scale binding point, EM _ CnAnd the compensation coefficient corresponding to the nth gray scale binding point is represented, the delta G represents the gray scale difference value between the (n + 1) th gray scale binding point and the nth gray scale binding point, the G represents a gray scale value between the (n + 1) th gray scale binding point and the nth gray scale binding point, and the n represents a gray scale value corresponding to the nth gray scale binding point.
After the gray scale binding points are selected, the gray scale binding points can be sorted according to the sequence of the gray scale values corresponding to the gray scale binding points from small to large, as shown in fig. 4, n +1 gray scale binding points are selected in total, the abscissa in fig. 4 represents the gray scale binding point node, and the ordinate represents the compensation coefficient EM _ C corresponding to the gray scale binding points.
For example, if the gray scale value corresponding to the (n + 1) th gray scale binding point is 255 gray scales, and the gray scale value corresponding to the nth gray scale binding point is 224 gray scales, g may be any one gray scale value between 255 gray scales and 224 gray scales. In addition, fig. 4 is only an example and is not intended to limit the present application.
According to the embodiment of the application, in the process of determining the compensation coefficient, the brightness of each gray scale is not required to be acquired, but only the brightness under the gray scale binding point is acquired, and the compensation coefficients corresponding to other gray scales except the gray scale binding point are determined by using a linear interpolation method, so that the time can be saved, and the production efficiency can be improved.
In the process of using the display panel in practice, rather than simply displaying only a pure gray scale image, a plurality of relatively complex images are usually displayed, for example, the displayed image includes a plurality of gray scales.
In some optional embodiments, in a case that a picture displayed by the display panel at the target refresh rate includes a plurality of gray scales, the display compensation method of the display panel provided in the embodiment of the present application may further include: dividing a display area of the display panel into m sub-display areas, wherein m is a positive number greater than or equal to 2; and regarding any one of the m sub-display areas, taking the compensation coefficient corresponding to the average value of each gray scale in the sub-display area as the compensation coefficient corresponding to the sub-display area.
As shown in fig. 5, for example, m is 9, and the display area AA of the display panel 100 is divided into 9 sub-display areas, a1 to a 9.
For example, the shapes and sizes of the sub-display regions may be the same.
For example, the sub-display area a1 includes 300 pixels in 10 rows and 30 columns, for example, the gray scale corresponding to the pixel in the 1 st row and the 1 st column is 20 gray scales, the gray scale corresponding to the pixel in the 1 st row and the 2 nd column is 21 gray scales, … …, the gray scale corresponding to the pixel in the 10 th row and the 30 th column is 26 gray scales, the average gray scale value of the 300 pixels can be calculated according to the gray scale value corresponding to each pixel in the 300 pixels, and then the compensation coefficient corresponding to the average gray scale value is used as the compensation coefficient corresponding to the sub-display area a 1.
The compensation coefficients corresponding to the other sub-display areas a 2-a 9 may be determined according to the manner of determining the compensation coefficient corresponding to the sub-display area a1, and are not described in detail herein.
It can be understood that, according to the embodiment of the present application, for a complex picture, the complex picture can be equivalent to a pure gray scale picture for compensation, so as to reduce the compensation difficulty, and the compensation coefficient corresponding to the average gray scale value can be used to take into account the gray scales in the sub-display area.
Illustratively, the display panel 100 includes a light emission control circuit 10 for generating a light emission control signal, and at least one light emission control circuit 10 is disposed corresponding to one sub-display region. Since the compensation coefficients corresponding to the sub-display regions are different, for example, the compensation coefficients corresponding to the sub-display regions a 1-a 9 are different, and one light-emitting control circuit 10 can only generate a light-emitting control signal with one duty ratio, at least one light-emitting control circuit 10 needs to be correspondingly disposed in each of the sub-display regions a 1-a 9. The light emission control circuit 10 may provide a light emission control signal for each sub-display through the light emission control signal line 11. Data lines (not shown) extend generally in the column direction Y, scan lines (not shown) extend generally in the row direction X, and the scan lines cross the data lines. The extending direction of the light emission control signal line 11 is generally the same as the extending direction of the scanning line.
As shown in fig. 6, if the sub-display regions are distributed in an array in the row direction X and the column direction Y of the display region AA, taking the sub-display region a5 as an example, the light-emitting control signal line 11 corresponding to the sub-display region a5 inevitably needs to pass through other sub-display regions, for example, the light-emitting control signal line 11 corresponding to the sub-display region a5 needs to pass through the sub-display region a4, so that not only the light-emitting control signal line 11 corresponding to the sub-display region a4 but also the light-emitting control signal line 11 corresponding to the sub-display region a5 exist in the sub-display region a4, and the number of signal lines in the sub-display region a4 is too large, which not only affects the resolution, but also causes coupling of the too many signal lines, and thus the display difference between the sub-display region a4 and the sub-display region a5 exists.
For example, the m sub-display regions may be arranged along an extending direction of the data lines of the display panel. As shown in fig. 5, as described above, the data lines (not shown) generally extend in the column direction Y, and the m sub-display regions are arranged in the column direction Y, so that the light emission control signal lines 11 in each sub-display region can be prevented from being unevenly distributed, thereby preventing the resolution from being affected and the display difference from being avoided.
As shown in fig. 2, the storage capacitor Cst maintains the gate potential of the driving transistor T1, and after data writing, for example, the gate potential of the driving transistor T1 is Vdata-Vth, Vth is the threshold voltage of the driving transistor T1, and the current I of the light emitting element is represented by the formula I-K (VDD-Vdata)2K is a constant, the current is positively correlated with the luminance of the light emitting element, the larger the current, the larger the luminance, VDD is a fixed positive voltage, Vdata is a positive voltage, and Vdata is not more than VDD. The larger Vdata is, the smaller the current I is, the smaller the brightness is, and the lower the corresponding gray scale is; the smaller Vdata is, the larger the current I is, the higher the brightness is, the higher the corresponding gray scale is, that is, the Vdata corresponding to the high gray scale is smaller than the Vdata corresponding to the low gray scale. In the time period of each frame, the gate potential of the driving transistor T1 has leakage, and the applicant has found that, in the high gray scale, the gate potential of the driving transistor T1 generally changes toward VDD, and in the low gray scale, the gate potential of the driving transistor T1 generally changes toward VDD, and the frame time periods at different refresh rates are different, so the gate potential of the driving transistor T1 changes to different extents.
For example, in the case where the reference refresh rate is smaller than the target refresh rate, the frame time length of the reference refresh rate is larger than that of the target refresh rate, that is, the gate potential leak time length of the driving transistor T1 at the reference refresh rate is longer, and therefore the degree of change in the gate potential of the driving transistor T1 at the reference refresh rate is larger than that of the gate potential of the driving transistor T1 at the target refresh rate. Under the reference refresh rate and the target refresh rate, the gate potential of the driving transistor T1 corresponding to the high gray-scale binding point increases toward VDD, and the gate potential of the driving transistor T1 at the reference refresh rate is closer to VDD, so that the luminance corresponding to the reference refresh rate is lower than the luminance corresponding to the target refresh rate at the high gray-scale.
In some optional embodiments, the duty ratio of the light emission control signal is a ratio of a duration of the light emission control signal at an active level within a frame duration to a frame duration, or the duty ratio of the light emission control signal is a ratio of a duration of the light emission control signal at an active level within a frame duration to a duration of the light emission control signal at an inactive level within a frame duration, and in a case where the reference refresh rate is less than the target refresh rate, the compensation coefficient corresponding to the gray scale binding point greater than or equal to the preset gray scale value is less than 1. Or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of one frame, or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of the light-emitting control signal at the valid level within the duration of one frame, and the compensation coefficient corresponding to the gray-scale binding point larger than or equal to the preset gray-scale value is larger than 1 under the condition that the reference refresh rate is smaller than the target refresh rate. Therefore, the light-emitting duration of the light-emitting element at the target refresh rate in each frame can be reduced to reduce the brightness corresponding to the target refresh rate, so that the brightness corresponding to the reference refresh rate and the brightness corresponding to the target refresh rate tend to be consistent.
In the case where the reference refresh rate is smaller than the target refresh rate, the gate potentials of the driving transistors T1 corresponding to the low gray-scale binding points all change toward a direction away from VDD, and the gate potential of the driving transistor T1 at the reference refresh rate is further away from VDD, resulting in higher luminance corresponding to the reference refresh rate than the target refresh rate at the low gray-scale. In some optional embodiments, the duty ratio of the light emission control signal is a ratio of a duration of the light emission control signal at an active level within a frame duration to a frame duration, or the duty ratio of the light emission control signal is a ratio of a duration of the light emission control signal at an active level within a frame duration to a duration of the light emission control signal at an inactive level within a frame duration, and in a case that the reference refresh rate is less than the target refresh rate, the compensation coefficient corresponding to the gray scale binding point that is less than the preset gray scale value is greater than 1. Or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of one frame, or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of the light-emitting control signal at the valid level within the duration of one frame, and the compensation coefficient corresponding to the gray scale binding point smaller than the preset gray scale value is smaller than 1 under the condition that the reference refresh rate is smaller than the target refresh rate. Thus, the light emitting time of the light emitting element at the target refresh rate in each frame can be increased to increase the luminance corresponding to the target refresh rate, so that the luminance corresponding to the reference refresh rate and the luminance corresponding to the target refresh rate tend to be the same.
Similarly, in the case where the reference refresh rate is larger than the target refresh rate, the frame time length of the reference refresh rate is smaller than the frame time length of the target refresh rate, that is, the gate potential leakage time length of the driving transistor T1 at the target refresh rate is longer, and therefore the degree of change in the gate potential of the driving transistor T1 at the target refresh rate is larger than the degree of change in the gate potential of the driving transistor T1 at the reference refresh rate. At the reference refresh rate and the target refresh rate, the gate potential of the driving transistor T1 corresponding to the high gray-scale binding point increases toward VDD, and the gate potential of the driving transistor T1 at the target refresh rate is closer to VDD, resulting in higher luminance corresponding to the reference refresh rate than the target refresh rate at the high gray-scale. Therefore, the duty ratio of the light emission control signal is the ratio of the duration of the light emission control signal at the active level within the duration of one frame to the duration of one frame, or the duty ratio of the light emission control signal is the ratio of the duration of the light emission control signal at the active level within the duration of one frame to the duration of the light emission control signal at the inactive level within the duration of one frame, and the compensation coefficient corresponding to the gray level tie point greater than or equal to the preset gray level value may be greater than 1 when the reference refresh rate is greater than the target refresh rate. Or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of one frame, or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of the light-emitting control signal at the valid level within the duration of one frame, and the compensation coefficient corresponding to the gray-scale binding point which is greater than or equal to the preset gray-scale value is smaller than 1 under the condition that the reference refresh rate is greater than the target refresh rate. Thus, the light emitting time of the light emitting element at the target refresh rate in each frame can be increased to increase the luminance corresponding to the target refresh rate, so that the luminance corresponding to the reference refresh rate and the luminance corresponding to the target refresh rate tend to be the same.
In the case where the reference refresh rate is greater than the target refresh rate, the gate potentials of the driving transistors T1 corresponding to the low gray-scale binding points all change toward a direction away from VDD, and the gate potential of the driving transistor T1 at the target refresh rate is further away from VDD, resulting in that the luminance corresponding to the reference refresh rate is lower than the luminance corresponding to the target refresh rate at low gray-scale. Therefore, the duty ratio of the light emission control signal is the ratio of the duration of the light emission control signal at the active level within the duration of one frame to the duration of one frame, or the duty ratio of the light emission control signal is the ratio of the duration of the light emission control signal at the active level within the duration of one frame to the duration of the light emission control signal at the inactive level within the duration of one frame, and the compensation coefficient corresponding to the gray level tie point greater than or equal to the preset gray level value may be less than 1 when the reference refresh rate is greater than the target refresh rate. Or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of one frame, or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of the light-emitting control signal at the valid level within the duration of one frame, and the compensation coefficient corresponding to the gray scale binding point smaller than the preset gray scale value is greater than 1 under the condition that the reference refresh rate is greater than the target refresh rate. Therefore, the light-emitting duration of the light-emitting element at the target refresh rate in each frame can be reduced to reduce the brightness corresponding to the target refresh rate, so that the brightness corresponding to the reference refresh rate and the brightness corresponding to the target refresh rate tend to be consistent.
For example, the preset gray level value may be set empirically, which is not limited in this application. For example, the predetermined gray scale value may be 60 gray scales, 90 gray scales, and the like.
The embodiment of the application also provides a display compensation device of the display panel. Fig. 7 is a schematic structural diagram illustrating a display compensation apparatus of a display panel according to an embodiment of the present application. As shown in fig. 7, the display compensation apparatus 700 of the display panel according to the embodiment of the present disclosure includes a data obtaining module 701 and a compensation module 702.
A data obtaining module 701, configured to obtain a reference duty ratio of a light-emitting control signal corresponding to each gray-scale binding point of the display panel at a reference refresh rate, and a compensation coefficient of the light-emitting control signal corresponding to each gray-scale binding point of the display panel at a target refresh rate;
and a compensation module 702, configured to compensate the displayed picture according to a product of the compensation coefficient and the reference duty ratio when the display panel is displayed at the target refresh rate.
According to the display compensation device of the display panel provided by the embodiment of the application, on one hand, a plurality of refresh rates of the display panel do not share the same duty ratio of the light-emitting control signal, but according to the product of the reference duty ratio of the light-emitting control signal of the display panel at the reference refresh rate and the compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point at the target refresh rate, when the display panel is displayed at the target refresh rate, a displayed picture is compensated according to the product, so that the display panel can use different duty ratios of the light-emitting control signal when being displayed at different refresh rates, and the problem of the occurrence of the flicker when the display panel is switched between different refresh rates is solved by adjusting the light-emitting duration of the light-emitting elements of the display panel. In addition, the duty ratio of the light-emitting control signal under each refresh rate is compensated, so that gamma debugging does not need to be carried out on each refresh rate, the time required by gamma debugging can be reduced, the number of OTP groups is reduced, and the production efficiency is improved.
In some alternative embodiments, the calculation formula of the compensation coefficient corresponding to any gray level binding point is as follows:
Figure BDA0003105303860000171
wherein EM _ CnRepresents the compensation coefficient corresponding to the gray level binding point n,
Figure BDA0003105303860000172
indicating that the gray scale tie point n is at the reference refresh rate and the duty ratio of the light emission control signal is the luminance value of the reference duty ratio,
Figure BDA0003105303860000173
and the brightness value which represents that the gray scale binding point n is at the target refresh rate and the duty ratio of the light-emitting control signal is the reference duty ratio.
In some alternative embodiments, the compensation coefficient corresponding to the gray level between two adjacent gray level binding points is calculated by the following formula:
Figure BDA0003105303860000174
wherein EM _ CgCompensation coefficients, EM _ C, representing gray level correspondence between two gray level bindingsn+1Represents the compensation coefficient corresponding to the (n + 1) th gray-scale binding point, EM _ CnAnd the compensation coefficient corresponding to the nth gray scale binding point is represented, the delta G represents the gray scale difference value between the (n + 1) th gray scale binding point and the nth gray scale binding point, the G represents a gray scale value between the (n + 1) th gray scale binding point and the nth gray scale binding point, and the n represents a gray scale value corresponding to the nth gray scale binding point.
In some optional embodiments, in the case that the picture displayed by the display panel at the target refresh rate includes a plurality of gray levels, the compensation module 702 is further configured to:
dividing a display area of the display panel into m sub-display areas, wherein m is a positive number greater than or equal to 2;
and regarding any one of the m sub-display areas, taking the compensation coefficient corresponding to the average value of each gray scale in the sub-display area as the compensation coefficient corresponding to the sub-display area.
In some alternative embodiments, the m sub-display sections are arranged along an extending direction of the data lines of the display panel.
In some optional embodiments, the data obtaining module 701 is further configured to:
acquiring data signal parameters corresponding to each gray scale binding point of the display panel under a reference refresh rate, wherein the actual display parameters of the display panel under the data signal parameters meet the display parameter requirements;
the compensation module 702 is further configured to:
when the display panel displays at the target refresh rate, the data signal parameter corresponding to the target refresh rate is set to be the same as the data signal parameter corresponding to the reference refresh rate under the same gray scale binding point.
In some optional embodiments, the duty ratio of the light emission control signal is a ratio of a duration of the light emission control signal at an active level within a frame duration to a frame duration, or the duty ratio of the light emission control signal is a ratio of a duration of the light emission control signal at an active level within a frame duration to a duration of the light emission control signal at an inactive level within a frame duration, where in a case where the reference refresh rate is less than the target refresh rate, a compensation coefficient corresponding to a gray scale binding point greater than or equal to a preset gray scale value is less than 1, a compensation coefficient corresponding to a gray scale binding point less than the preset gray scale value is greater than 1, and in a case where the reference refresh rate is greater than the target refresh rate, a compensation coefficient corresponding to a gray scale binding point greater than or equal to the preset gray scale value is greater than 1, and a compensation coefficient corresponding to a gray scale binding point less than the preset gray scale value is less than 1;
or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of one frame, or the duty ratio of the light-emitting control signal is the ratio of the duration of the light-emitting control signal at the invalid level within the duration of one frame to the duration of the light-emitting control signal at the valid level within the duration of one frame, when the reference refresh rate is less than the target refresh rate, the compensation coefficient corresponding to the gray scale binding point greater than or equal to the preset gray scale value is greater than 1, and the compensation coefficient corresponding to the gray scale binding point less than the preset gray scale value is less than 1, and when the reference refresh rate is greater than the target refresh rate, the compensation coefficient corresponding to the gray scale binding point greater than or equal to the preset gray scale value is less than 1, and the compensation coefficient corresponding to the gray scale binding point less than the preset gray scale value is greater than 1.
The display compensation device of the display panel in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device can be mobile electronic equipment or non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine or a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
The display compensation device of the display panel in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
Fig. 8 is a schematic diagram illustrating a hardware structure of a display device according to an embodiment of the present invention.
The display device may include a processor 901 and a memory 902 storing computer program instructions.
Specifically, the processor 901 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing the embodiments of the present invention.
Memory 902 may include mass storage for data or instructions. By way of example, and not limitation, memory 902 may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, tape, or Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 902 may include removable or non-removable (or fixed) media, where appropriate. The memory 902 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 902 is a non-volatile solid-state memory. In a particular embodiment, the memory 902 includes Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or a combination of two or more of these.
The processor 901 realizes any one of the compensation voltage determination methods in the above embodiments by reading and executing computer program instructions stored in the memory 902.
In one example, the display device can also include a communication interface 903 and a bus 910. As shown in fig. 8, the processor 901, the memory 902, and the communication interface 903 are connected via a bus 910 to complete communication with each other.
The communication interface 903 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
The bus 910 includes hardware, software, or both to couple the components of the display device to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 910 can include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
The display device can perform the display compensation method of the display panel in the embodiment of the present application, thereby implementing the display compensation method of the display panel and the display compensation device of the display panel described in conjunction with fig. 1 and 7.
The display device includes, but is not limited to, an electronic device such as a mobile phone, a tablet computer, a digital camera, and a notebook computer.
In addition, in combination with the display compensation method of the display panel in the foregoing embodiments, the embodiments of the present application may provide a computer-readable storage medium to implement the method. The computer readable storage medium having stored thereon computer program instructions; when executed by the processor, the computer program instructions implement any one of the display panel display compensation methods in the embodiments described above, and can achieve the same technical effects, and are not described herein again to avoid repetition. The computer-readable storage medium may include a non-transitory computer-readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like, which is not limited herein.
In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive and do not limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims (10)

1. A display compensation method of a display panel, comprising:
acquiring a reference duty ratio of a light-emitting control signal of a display panel under a reference refresh rate and a compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point of the display panel under a target refresh rate;
and when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the compensation coefficient and the reference duty ratio.
2. The display compensation method of claim 1, wherein the calculation formula of the compensation coefficient corresponding to any one of the gray-scale binding points is as follows:
Figure FDA0003105303850000011
wherein EM _ CnRepresents the compensation coefficient corresponding to the gray level binding point n,
Figure FDA0003105303850000013
Figure FDA0003105303850000014
indicating that the gray scale tie point n is at the reference refresh rate and the duty ratio of the light emission control signal is a luminance value of the reference duty ratio,
Figure FDA0003105303850000015
and the gray scale binding point n is represented at the target refresh rate, and the duty ratio of the light-emitting control signal is the brightness value of the reference duty ratio.
3. The method according to claim 1, wherein the compensation coefficient corresponding to gray level between two adjacent gray level binding points is calculated by the following formula:
Figure FDA0003105303850000012
wherein EM _ CgSaid compensation factor, EM C, representing a gray level correspondence between two said gray level bindingsn+1Represents the compensation coefficient corresponding to the (n + 1) th gray-scale binding point, EM _ CnAnd the compensation coefficient corresponding to the nth gray scale binding point is represented, the delta G represents the gray scale difference value between the (n + 1) th gray scale binding point and the nth gray scale binding point, the G represents a gray scale value between the (n + 1) th gray scale binding point and the nth gray scale binding point, and the n represents a gray scale value corresponding to the nth gray scale binding point.
4. The method according to claim 1, wherein if the picture displayed by the display panel at the target refresh rate comprises a plurality of gray levels, the method further comprises:
dividing a display area of the display panel into m sub-display areas, wherein m is a positive number greater than or equal to 2;
and regarding any one of the m sub-display areas, taking the compensation coefficient corresponding to the average value of each gray scale in the sub-display area as the compensation coefficient corresponding to the sub-display area.
5. The display compensation method of claim 4, wherein the m sub-display regions are arranged along an extending direction of the data lines of the display panel.
6. The display compensation method of a display panel according to claim 1, further comprising:
acquiring data signal parameters corresponding to the gray scale binding points of the display panel under the reference refresh rate, wherein the actual display parameters of the display panel under the data signal parameters meet the requirements of display parameters;
and when the display panel displays at the target refresh rate, setting the data signal parameter corresponding to the target refresh rate to be the same as the data signal parameter corresponding to the reference refresh rate under the same gray scale binding point.
7. The display compensation method of claim 1, wherein a duty ratio of the emission control signal is a ratio of a duration of the emission control signal at an active level within a frame duration to a frame duration, or wherein the duty ratio of the emission control signal is a ratio of a duration of the emission control signal at an active level within a frame duration to a duration of the emission control signal at an inactive level within a frame duration, wherein in a case where the reference refresh rate is less than the target refresh rate, the compensation coefficient corresponding to a gray scale binding point greater than or equal to a preset gray scale value is less than 1, the compensation coefficient corresponding to a gray scale binding point less than the preset gray scale value is greater than 1, and in a case where the reference refresh rate is greater than the target refresh rate, the compensation coefficient corresponding to a gray scale binding point greater than or equal to the preset gray scale value is greater than 1, the compensation coefficient corresponding to the gray scale binding point smaller than the preset gray scale value is smaller than 1;
or the duty ratio of the light-emitting control signal is the ratio of the time length of the light-emitting control signal which is at an invalid level in one frame time length to one frame time length, or the duty ratio of the light-emitting control signal is the ratio of the time length of the light-emitting control signal which is at the invalid level in one frame time length to the time length of the light-emitting control signal which is at the valid level in one frame time length, when the reference refresh rate is less than the target refresh rate, the compensation coefficient corresponding to a gray scale binding point greater than or equal to a preset gray scale value is greater than 1, the compensation coefficient corresponding to a gray scale binding point less than the preset gray scale value is less than 1, and under the condition that the reference refresh rate is greater than the target refresh rate, the compensation coefficient corresponding to the gray scale binding point greater than or equal to the preset gray scale value is less than 1, and the compensation coefficient corresponding to the gray scale binding point smaller than the preset gray scale value is greater than 1.
8. A display compensation apparatus for a display panel, comprising:
the data acquisition module is used for acquiring the reference duty ratio of the light-emitting control signal corresponding to each gray scale binding point of the display panel under the reference refresh rate and the compensation coefficient of the light-emitting control signal corresponding to each gray scale binding point of the display panel under the target refresh rate;
and the compensation module is used for compensating the displayed picture according to the product of the compensation coefficient and the reference duty ratio when the display panel displays at the target refresh rate.
9. A display device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the display compensation method of the display panel according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the display compensation method of a display panel according to any one of claims 1 to 7.
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