CN114882842B - Display driving method, device, equipment and storage medium - Google Patents
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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Abstract
The application discloses a display driving method, a device, equipment and a storage medium. Comprising the following steps: acquiring a first data voltage corresponding to a sub-pixel when the display panel displays a previous frame of picture and a first duration of the previous frame of picture; determining a first compensation voltage corresponding to a first data voltage and a first duration according to a preset first corresponding relation, wherein the first corresponding relation comprises a corresponding relation among the data voltage, the duration and the compensation voltage, the compensation voltage in the first corresponding relation is determined according to a threshold voltage offset of a transistor, and the threshold voltage offset is determined according to the data voltage and the duration applied by a grid electrode of the transistor; and taking the first compensation voltage as a data voltage compensation value of the sub-pixel to display the current frame picture. According to the embodiment of the application, the problem of residual shadow of the display panel can be solved.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a display driving method, a device, equipment and a storage medium.
Background
The display panel is generally composed of a plurality of light emitting pixels arranged in an array, and the light emitting pixels include a pixel circuit and a light emitting element. The pixel circuit is typically composed of a TFT (Thin Film Transistor ) and a capacitor. The Light Emitting element may generally include an OLED (Organic Light-Emitting Diode) or other Light Emitting device.
However, the display panel has a problem of afterimage when displaying, for example, when the display screen of the display panel is switched from one screen to another, the afterimage of the previous screen still affects the display effect of the display panel.
Disclosure of Invention
The embodiment of the application provides a display driving method, a device, equipment and a storage medium, which can solve the problem of afterimage of a display panel.
In a first aspect, an embodiment of the present application provides a display driving method, including:
acquiring a first data voltage corresponding to a sub-pixel when the display panel displays a previous frame of picture and a first duration of the previous frame of picture;
determining a first compensation voltage corresponding to a first data voltage and a first duration according to a preset first corresponding relation, wherein the first corresponding relation comprises a corresponding relation among the data voltage, the duration and the compensation voltage, the compensation voltage in the first corresponding relation is determined according to a threshold voltage offset of a transistor, and the threshold voltage offset is determined according to the data voltage and the duration applied by a grid electrode of the transistor;
and taking the first compensation voltage as a data voltage compensation value of the sub-pixel to display the current frame picture.
In a possible implementation manner of the first aspect, the first correspondence relationship specifically includes a correspondence relationship between the data voltage, the duration, the variation amount of the data voltage and the compensation voltage,
the method further comprises the steps of:
acquiring initial data voltages corresponding to sub-pixels in a current frame picture, and determining the variation of a first data voltage according to the initial data voltages;
according to a preset first corresponding relation, determining a first data voltage and a first compensation voltage corresponding to a first duration specifically includes:
according to a preset first corresponding relation, determining a first data voltage, a first duration and a first compensation voltage corresponding to the variation of the first data voltage.
In a possible implementation manner of the first aspect, the first correspondence is determined according to the following manner:
determining a second corresponding relation according to threshold voltage offset of the grid electrode of the sample transistor under different data voltages and different duration time;
selecting a plurality of groups of sample data, wherein each group of sample data comprises data voltage, duration time and variation of the data voltage;
for any group of sample data, determining a threshold voltage offset corresponding to the data voltage and duration in the sample data in a second corresponding relation, and taking the threshold voltage offset as a compensation voltage initial value corresponding to the sample data;
Analyzing the display effect of the sample display panel under the initial value of the compensation voltage, if the display effect meets the preset requirement, taking the initial value of the compensation voltage as the first compensation voltage corresponding to the sample data, and if the display effect does not meet the preset requirement, adjusting the initial value of the compensation voltage until the display effect of the sample display panel under the adjusted initial value of the compensation voltage meets the preset requirement, and taking the adjusted initial value of the compensation voltage as the first compensation voltage corresponding to the sample data;
and determining a first corresponding relation according to the plurality of groups of sample data and the first compensation voltage corresponding to the sample data.
In a possible implementation manner of the first aspect, selecting a plurality of sets of sample data includes:
selecting a plurality of gray scale binding points, and acquiring data voltage of the sample display panel at any one gray scale binding point as data voltage in each group of sample data.
In a possible implementation manner of the first aspect, the selected plurality of gray-scale binding points are the same as the plurality of gray-scale binding points selected by the display panel during gamma debugging.
In a possible implementation manner of the first aspect, the variation of the data voltages in each set of sample data is determined according to a difference between the data voltages at any two sets of gray scale binding points.
In a possible implementation manner of the first aspect, before determining, according to a preset first correspondence, a first data voltage and a first compensation voltage corresponding to the first duration, the method further includes:
selecting the corresponding sub-pixels with the first duration longer than or equal to the duration threshold value from the sub-pixels.
In a possible implementation manner of the first aspect, the obtaining a first data voltage corresponding to a sub-pixel when the display panel displays a previous frame of picture and a first duration of the previous frame of picture includes:
and when the display panel displays the previous frame of picture, acquiring a first data voltage corresponding to the sub-pixel in the target display area and a first duration of the previous frame of picture.
In a possible implementation manner of the first aspect, the preparation process of the sample transistor is the same as the preparation process of the transistor of the pixel circuit in the display panel.
In a possible implementation manner of the first aspect, the sample transistor is a driving transistor of a pixel circuit in the sample display panel.
In a possible implementation manner of the first aspect, the sample display panel and the preparation process of the display panel are the same.
In a second aspect, an embodiment of the present application provides a display driving apparatus, including:
The data acquisition module is used for acquiring first data voltage corresponding to the sub-pixel and first duration of the previous frame of picture when the display panel displays the previous frame of picture;
the compensation determining module is used for determining a first compensation voltage corresponding to a first data voltage and a first duration according to a preset first corresponding relation, wherein the first corresponding relation comprises a corresponding relation of the data voltage, the duration and the compensation voltage, the compensation voltage in the first corresponding relation is determined according to a threshold voltage offset of the sample transistor, and the threshold voltage offset is related to the data voltage and the duration applied by a grid electrode of the sample transistor;
and the compensation module is used for taking the first compensation voltage as a data voltage compensation value of the sub-pixel so as to display the current frame picture.
In a third aspect, embodiments of the present application provide a display device, including: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements the display driving method as described in the first aspect.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement a display driving method according to the first aspect.
In addition, the threshold voltage offset in the embodiment of the application is not set at will, but is determined according to the data voltage and the duration applied by the gate of the transistor, so that the obtained threshold voltage offset is more accurate, and further, the compensation voltage determined based on the threshold voltage offset is more accurate, thereby better solving the problem of ghost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings needed in the embodiments of the present application, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a display driving method according to an embodiment of the present application;
FIG. 2 is a flow chart of a display driving method according to another embodiment of the present application;
fig. 3 to 6 are schematic flow diagrams of a display driving method according to still other embodiments of the present application;
FIG. 7 is a schematic diagram of a display driving apparatus according to an embodiment of the present disclosure;
fig. 8 is a schematic structural view of a display device according to another embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to explain the present application and are not configured 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 showing examples of the present application.
It is noted that relational terms such as first and second, and the like are 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. Moreover, 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 like elements in a process, method, article or apparatus that comprises the element.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, this application is intended to cover such modifications and variations of this application as fall within the scope of the appended claims (the claims) and their equivalents. The embodiments provided in the examples of the present application may be combined with each other without contradiction.
Before describing the technical solution 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 describes the problems existing in the related art:
when the display panel is switched from one picture to another picture, the residual image of the previous picture still exists, and particularly, the residual image problem is more obvious when the display time of the previous picture is longer or in a low gray level mode such as a dark mode.
The inventor researches and discovers that when a transistor in a pixel circuit is pressurized for a long time, the threshold voltage of the transistor is shifted, and when a picture is switched, the threshold voltage of the transistor cannot be immediately recovered, so that when the picture is switched to the next picture, the displayed brightness is influenced by the previous picture, and a short-term afterimage phenomenon is generated.
In view of the above-described studies of the inventors, the embodiments of the present application consider compensating the data voltage of the sub-pixel based on the threshold voltage offset of the transistor, thereby driving the display panel to display. Specifically, the embodiment of the application provides a display driving method, a device, equipment and a storage medium. The following first describes a display driving method provided in an embodiment of the present application. As shown in fig. 1, the display driving method provided in the embodiment of the present application includes S110 to S130.
S110, acquiring a first data voltage corresponding to a sub-pixel and a first duration of a previous frame of picture when the display panel displays the previous frame of picture;
s120, determining a first compensation voltage corresponding to a first data voltage and a first duration according to a preset first corresponding relation, wherein the first corresponding relation comprises a corresponding relation among the data voltage, the duration and the compensation voltage, the compensation voltage in the first corresponding relation is determined according to a threshold voltage offset of a transistor, and the threshold voltage offset is determined according to the data voltage and the duration applied by a grid electrode of the transistor;
S130, taking the first compensation voltage as a data voltage compensation value of the sub-pixel to display the current frame picture.
The display panel may include a plurality of pixels arranged in an array, the pixels may include sub-pixels of a plurality of colors, the sub-pixels may include pixel circuits and light emitting elements, and the pixel circuits may be capable of supplying a driving current to the light emitting elements under the driving of the data voltages to make the light emitting elements emit light under the driving current.
In S110, the first data voltage corresponding to each sub-pixel of the display panel and the first duration of the previous frame of picture may be obtained, or the first data voltage corresponding to a portion of the sub-pixels and the first duration of the previous frame of picture may be selected. The first data voltage may be understood as a data voltage value written into the sub-pixel when the display panel displays a previous frame of picture.
For better understanding of the first correspondence, the relationship of the first correspondence may be, for example, the following formula (1):
ΔVd＝f 1 (V i ,t i ) (1)
wherein DeltaVd represents the compensation voltage, V i Representing the data voltage, t i Indicating the duration.
It is understood that a set of data voltages, duration corresponds to one compensation voltage.
Specifically, the obtained first data voltage may be input to V in the formula (1) i The first duration inputs t in equation (1) i Thereby obtaining a value of the compensation voltage Δvd, which is a first data voltage and a first compensation voltage corresponding to the first duration.
The inventors have found that the threshold voltage shift is related to the data voltage and duration applied by the gate of the transistor. For example, the larger the data voltage applied to the gate of the transistor, the more serious the threshold voltage shift thereof, and the longer the duration of the data voltage applied to the gate of the transistor, the more serious the threshold voltage shift thereof.
Taking the corresponding relationship between the threshold voltage offset and the data voltage and the duration as the second corresponding relationship as an example, the following formula (2) may be exemplified:
ΔVth＝f 2 (V j ,t j ) (2)
wherein ΔVth represents the threshold voltage shift amount, V j Representing the data voltage, t i Indicating the duration of the application of the data voltage.
In the embodiment of the present application, the compensation voltage Δvd in the first correspondence is offset according to the threshold voltage of the transistorQuantitatively determined, exemplary, at V i ＝V j And t i ＝t j In this case, the corresponding value of Δvd may be determined according to the value of Δvth, for example, the value of Δvd may be set equal to the value of Δvth, or may be adjusted based on the value of Δvth to obtain the value of Δvd.
The pixel circuit of the sub-pixel may include a plurality of transistors, which in the embodiments of the present application may be driving transistors of the pixel circuit variety, for example.
According to the display driving method provided by the embodiment of the application, since the compensation voltage of the sub-pixel is determined according to the threshold voltage offset of the transistor, the problem of the ghost caused by the threshold voltage offset of the transistor can be improved or solved.
For example, the display panel is switched from one frame to another frame, and the brightness difference of the sub-pixels between the two frames may not be considered, that is, the sub-pixels may be compensated with the same data voltage compensation value. The brightness of the sub-pixel corresponds to the gray scale, and it can be understood that the same data voltage compensation value can be used when the sub-pixel is switched from one gray scale value to any gray scale value for display. For example, when the gray level of a sub-pixel in the previous frame is 0 and the sub-pixel is switched to any one of the gray levels of 10, 100, 180, 255, etc., the same data voltage compensation value may be used.
The applicant has further studied to find that the required data voltage compensation values are different for sub-pixels at different brightness. The display driving method provided by the embodiment of the application further considers the brightness difference between two frames of pictures. The brightness corresponds to the gray scale, and the gray scale corresponds to the data voltage, that is, the first correspondence may specifically include the data voltage, the duration, the variation of the data voltage, and the correspondence between the compensation voltages, so that the variation of the data voltage between two frames of pictures can be taken into consideration, thereby further improving the compensation effect and better solving the problem of afterimage.
For better understanding of the first correspondence, the relationship of the first correspondence may be, for example, the following formula (3):
ΔVd＝f 1 (V i ,t i ,ΔVi) (3)
wherein DeltaVd represents the compensation voltage, V i Representing the data voltage, t i The duration is indicated, and Δvi indicates the amount of change in the data voltage.
In some alternative embodiments, as shown in fig. 2, the display driving method provided in the embodiment of the present application may further include S111.
S111, acquiring initial data voltages corresponding to the sub-pixels in the current frame picture, and determining the variation of the first data voltage according to the initial data voltages.
Correspondingly, S120 may specifically include:
according to a preset first corresponding relation, determining a first data voltage, a first duration and a first compensation voltage corresponding to the variation of the first data voltage.
For example, the initial data voltage acquired in S111 may be a data voltage corresponding to the sub-pixel of the display panel after gamma debugging.
It can be understood that the variation of the first data voltage is the variation of the sub-pixel generated by switching the data voltage at the previous frame to the data voltage at the current frame. Here, the data voltage corresponding to the sub-pixel in the current frame picture is referred to as an initial data voltage, and for example, a difference between the initial data voltage corresponding to the sub-pixel and the first data voltage may be used as a variation amount of the first data voltage corresponding to the sub-pixel.
Specifically, V in the formula (3) may be inputted with the first data voltages obtained in S110 and S111 i T in the first duration input type (3) i The variation of the first data voltage is input to Δvi in equation (3), and a value of the compensation voltage Δvd, that is, the first data voltage, the first duration, and the first compensation voltage corresponding to the variation of the first data voltage, is obtained.
For example, the first correspondence may be determined first, and the determined first correspondence may be stored in the memory chip. The memory chip may be any one of a coded Flash memory (Flash IC), a random access memory (RAM, random Access Memory), a synchronous dynamic random access memory (SDRAM, synchronous dynamic random-access memory), or a double rate synchronous dynamic random access memory (DDR, double Data Rate SDRAM).
The process of determining the first correspondence may be understood as a process of building a compensation model.
In some alternative embodiments, as shown in fig. 3, the determining manner of the first correspondence relationship may include S21 to S25.
S21, determining a second corresponding relation according to threshold voltage offset of the grid electrode of the sample transistor under different data voltages and different duration time;
s22, selecting a plurality of groups of sample data, wherein each group of sample data comprises data voltage, duration time and variation of the data voltage;
s23, for any group of sample data, determining a threshold voltage offset corresponding to the sample data in a second corresponding relation, and taking the threshold voltage offset as a compensation voltage initial value corresponding to the sample data;
S24, analyzing the display effect of the sample display panel under the initial value of the compensation voltage, if the display effect meets the preset requirement, taking the initial value of the compensation voltage as the first compensation voltage corresponding to the sample data, and if the display effect does not meet the preset requirement, adjusting the initial value of the compensation voltage until the display effect of the sample display panel under the initial value of the adjusted compensation voltage meets the preset requirement, and taking the initial value of the adjusted compensation voltage as the first compensation voltage corresponding to the sample data;
s25, determining a first corresponding relation according to the plurality of groups of sample data and the first compensation voltage corresponding to the sample data.
In S21, different data voltages and different durations may be applied to the gates of the sample transistors, and the threshold voltage offsets corresponding to the respective sets of data voltages and durations may be measured and recorded. For example, the threshold voltage shift amounts corresponding to the sample transistors at the data voltages of 2V for the durations of 0.1 seconds, 0.15 seconds, 0.2 seconds, 0.25 seconds, etc., respectively, the threshold voltage shift amounts corresponding to the sample transistors at the data voltages of 2.5V for the durations of 0.1 seconds, 0.15 seconds, 0.2 seconds, 0.25 seconds, etc., respectively, the threshold voltage shift amounts corresponding to the sample transistors at the data voltages of 3V for the durations of 0.1 seconds, 0.15 seconds, 0.2 seconds, 0.25 seconds, etc., respectively, and so on are measured and recorded.
For example, the data voltage and the duration applied to the gate of the sample transistor may be set according to the actual display condition of the display panel. For example, the respective data voltage values applied to the gates of the sample transistors may be uniformly set according to the range of the data voltages corresponding to the sub-pixels at the time of actual display of the display panel. The duration of applying the voltage to the gate of the sample transistor may be uniformly set according to the range of the display duration corresponding to the sub-pixel when the display panel is actually displayed.
Then, a second correspondence may be fitted according to the measured and recorded sets of data. It can be appreciated that the more data is measured and recorded, the more accurate the resulting second correspondence is.
For example, in S22, the data voltage and the duration in the sample data may be the same as the data voltage and the duration in which the gate of the sample transistor is applied in S21, respectively. Of course, the data corresponding to the two may be set to be different. The variation of the data voltage can be determined according to the difference value of the data voltages corresponding to the sub-pixels in the front frame picture and the rear frame picture.
For example, different gray-scale images can be selected, the data voltage in the sample data is determined according to the data voltage corresponding to the sub-pixel in the previous frame of the different gray-scale images, the variation of the data voltage is determined according to the difference value of the data voltage corresponding to the sub-pixel in the previous and the next frames of images, and then the duration of each frame of images is empirically set.
Taking the example that the data voltage in one group of sample data is 2.2V, the duration is 0.1 seconds, and the variation of the data voltage is 0.3V, in S23, the data voltage is 2.2V and V in the formula (2) can be input j Inputting the duration into t in formula (2) i Thereby obtaining the value of the threshold voltage offset delta Vth, and taking the value of the threshold voltage offset delta Vth as the initial value of the compensation voltage corresponding to the group of sample data. The initial values of the compensation voltages corresponding to other sets of sample data may be determined in this manner, and will not be described in detail herein.
In S24, analyzing the compensation effect of the sample display panel at the initial value of the compensation voltage may specifically include: and providing data voltage for the sample display panel and analyzing the display effect. The supplied data voltage may be understood as a sum of an initial value of the compensation voltage, the data voltage in the sample data, and a variation amount of the data voltage, or the supplied data voltage may be understood as a sum of the initial value of the compensation voltage and an initial data voltage corresponding to the sub-pixel in a subsequent frame. Analyzing the display effect may include analyzing a ghost condition of the sample display panel; the preset requirements may include ghost requirements. It is understood that the display effect when the sample display panel displays the switched screen is analyzed.
In order to better understand S24, taking the example that the sample display panel is switched from the 0 gray-scale frame to the 255 gray-scale frame, the display effect when the 255 gray-scale frame is displayed is analyzed. For example, the data voltage of the sub-pixel under the 0 gray scale picture is V 1 The duration of the sample display panel for displaying the 0 gray scale picture is t1, and the initial data voltage of the sub-pixels under the 255 gray scale picture is V 255 In S23, V may be set 1 In the t1 input equation (2), a threshold voltage shift Δvth1 is obtained, and the threshold voltage shift Δvth1 is used as the sample data (V 1 T 1) corresponding to the compensation voltage initial value. The 0 gray scale picture is switched to 255 gray scale pictures, and the corresponding change amount of the data voltage is V 255 And V is equal to 1 Is a sample in S24The data voltage provided by the display panel can be delta Vth1, V 1 、(V 255 -V 1 ) Sum of three of V 1 +(V 255 -V 1 )＝V 255 Therefore, in S24, the data voltages supplied to the sample display panel can be understood as Δvt1 and V 255 Is a sum of both.
According to S23 to S24, first compensation voltages corresponding to a plurality of groups of sample data may be obtained, and then in S25, the plurality of groups of sample data and the first compensation voltages corresponding to the sample data may be fitted, so as to determine a first correspondence.
According to the embodiment of the application, the first corresponding relation can be accurately determined, and further the accuracy of the data voltage compensation value obtained according to the first corresponding relation is guaranteed.
In some alternative embodiments, the preparation process of the sample transistor may be the same as the preparation process of the transistor of the pixel circuit in the display panel, so that the second correspondence obtained by using the sample transistor is more consistent with the actual situation of the display panel, and the obtained compensation voltage is also more consistent with the actual situation of the display panel, so as to perform better compensation on the display panel.
In some alternative embodiments, the sample transistor may be a drive transistor for a pixel circuit in a sample display panel. The sample display panel needs to have a display function, so that the sample display panel needs to include a pixel circuit, and the pixel circuit is composed of transistors, so that the second corresponding relationship can be determined by using the sample display panel without additionally producing the transistors.
In some alternative embodiments, the sample display panel is fabricated in the same process as the display panel. For example, the sample display panel may be selected from the same batch of display panels, so that the characteristics of the sample display panel and the display panel are the same, the determined first corresponding relationship and the second corresponding relationship can be ensured to conform to the actual situation of the display panel, and the display panel does not need to be additionally produced as the sample display panel.
In some alternative embodiments, as shown in fig. 4, selecting multiple sets of sample data in S22 may specifically include: selecting a plurality of gray scale binding points, and acquiring data voltage of the sample display panel at any one gray scale binding point as data voltage in each group of sample data.
Each gray level binding point corresponds to a specific gray level value, and the specific number of gray level binding points is not limited herein. For example, among 256 gray scales of 0 to 255, 20 to 40 gray scales may be selected at intervals as gray scale binding points. For another example, the gray scale binding points may include 32 gray scales, 64 gray scales, 96 gray scales, 128 gray scales, 160 gray scales, 192 gray scales, 224 gray scales, 255 gray scales, and the like.
The data voltage of the sample display panel under any gray scale binding point can be the data voltage obtained after gamma debugging is carried out on the sample display panel.
As described above, the more sample data is selected, the more accurate the first correspondence is determined, but it is difficult to exhaust all the data in the process of determining the first correspondence. The display panel usually has a certain gray scale range, and some gray scale values are selected in the gray scale range as gray scale binding points, so that the display panel is more suitable for the actual display condition of the display panel.
In some alternative embodiments, the selected plurality of gray-scale binding points are the same as the plurality of gray-scale binding points selected by the display panel during gamma debugging. Since gamma debugging is required before the display panel leaves the factory, some gray-scale binding points are usually selected in the gamma debugging process, so that data voltages corresponding to the gray-scale binding points are determined, and data voltages corresponding to other gray-scales are calculated based on interpolation methods according to the data voltages corresponding to the gray-scale binding points, it can be understood that the accuracy of the data voltages corresponding to the gray-scale binding points is higher. In the embodiment of the application, the selected plurality of gray-scale binding points are the same as the selected plurality of gray-scale binding points of the display panel during gamma debugging, so that the data voltages corresponding to the selected plurality of gray-scale binding points are relatively accurate, and the accuracy of the obtained first corresponding relation is further ensured.
In some alternative embodiments, the amount of change in the data voltages in each set of sample data is determined based on the difference between the data voltages at any two sets of gray scale binding points. As described above, since the data voltages corresponding to the selected plurality of gray-scale binding points are relatively accurate, the variation of the data voltages obtained based on the difference between the data voltages corresponding to the two gray-scale binding points is also relatively accurate, thereby further ensuring the accuracy of the obtained first correspondence.
The longer the time of the previous picture display is, the more serious the ghost phenomenon is, and under the condition that the display duration of the picture is short, the ghost phenomenon can be ignored, so that compensation is unnecessary.
In some alternative embodiments, as shown in fig. 5, before S120, the display driving method provided in the embodiment of the present application may further include S121.
S121, selecting the sub-pixels with the corresponding first duration longer than or equal to the duration threshold value from the sub-pixels.
It will be appreciated that in this case, in S110, when the display panel needs to display the previous frame, the first data voltage corresponding to each sub-pixel and the first duration of the previous frame are acquired.
For example, the time period threshold may be set according to an actual display condition of the display panel. For example, in the case where the display time period is longer than 0.5 seconds, the afterimage phenomenon is remarkable, and the time period threshold may be set to 0.5 seconds. Of course, this is merely an example and is not intended to limit the present application.
According to the embodiment of the application, the data corresponding to part of the sub-pixels can be screened out, so that the screened-out sub-pixels do not need to be compensated, only the compensation voltage corresponding to the selected sub-pixels is needed to be calculated, the calculated amount can be reduced, and the real-time performance of display driving is improved.
Some display areas of a display panel typically do not display the same picture for a long time, and only a portion of the display areas need to display the same picture for a long time. For example, for a television screen, station icons (e.g., CCTV1, CCTV2, etc.) are displayed for a long time in a display area at a corner position, and the display area is relatively easy to have a ghost phenomenon, so that only sub-pixels in the display area that are easy to have a ghost phenomenon can be compensated.
In some alternative embodiments, as shown in fig. 6, S110 may specifically include: and when the display panel displays the previous frame of picture, acquiring a first data voltage corresponding to the sub-pixel in the target display area and a first duration of the previous frame of picture.
For example, the location of the target display area may be empirically set.
In the embodiment of the application, only the display data of the sub-pixels in the target display area are acquired, the data of all the sub-pixels of the display panel are not required to be acquired, the acquired data volume and the calculated volume can be greatly reduced, the real-time performance of display driving is improved, and the storage space required for storing the data can be reduced.
The embodiment of the application further provides a display driving device, as shown in fig. 7, where the display driving device 700 provided in the embodiment of the application includes a data acquisition module 701, a compensation determination module 702, and a compensation module 703.
The data acquisition module 701 is configured to acquire a first data voltage corresponding to a sub-pixel when the display panel displays a previous frame of picture and a first duration of the previous frame of picture;
the compensation determining module 702 is configured to determine a first compensation voltage corresponding to a first data voltage and a first duration according to a preset first correspondence, where the first correspondence includes a correspondence of the data voltage, the duration, and the compensation voltage in the first correspondence is determined according to a threshold voltage offset of the sample transistor, where the threshold voltage offset is related to the data voltage and the duration applied to the gate of the sample transistor;
the compensation module 703 is configured to take the first compensation voltage as a data voltage compensation value of the sub-pixel, so as to display the current frame.
According to the display driving device provided by the embodiment of the application, since the compensation voltage of the sub-pixel is determined according to the threshold voltage offset of the transistor, the problem of the ghost caused by the threshold voltage offset of the transistor can be improved or solved.
The display driving device may be integrated in a display panel, a display terminal such as a mobile phone, or both, for example. It can be understood that the display driving device is integrated in the display panel, and needs to be debugged before the display panel is out of the field, and the display driving device is integrated in the display terminal, so that the display effect can be improved by calibrating again along with the aging of the display panel.
In some alternative embodiments, the first correspondence relationship specifically includes a correspondence relationship between the data voltage, the duration, the variation of the data voltage, and the compensation voltage,
the data acquisition module 701 is further configured to acquire an initial data voltage corresponding to a subpixel in the current frame, and determine a variation of the first data voltage according to the initial data voltage;
the compensation determining module 702 is specifically configured to:
according to a preset first corresponding relation, determining a first data voltage, a first duration and a first compensation voltage corresponding to the variation of the first data voltage.
In some alternative embodiments, the first correspondence is determined according to the following:
determining a second corresponding relation according to threshold voltage offset of the grid electrode of the sample transistor under different data voltages and different duration time;
Selecting a plurality of groups of sample data, wherein each group of sample data comprises data voltage, duration time and variation of the data voltage;
for any group of sample data, determining a threshold voltage offset corresponding to the data voltage and duration in the sample data in a second corresponding relation, and taking the threshold voltage offset as a compensation voltage initial value corresponding to the sample data;
analyzing the display effect of the sample display panel under the initial value of the compensation voltage, if the display effect meets the preset requirement, taking the initial value of the compensation voltage as the first compensation voltage corresponding to the sample data, and if the display effect does not meet the preset requirement, adjusting the initial value of the compensation voltage until the display effect of the sample display panel under the adjusted initial value of the compensation voltage meets the preset requirement, and taking the adjusted initial value of the compensation voltage as the first compensation voltage corresponding to the sample data;
and determining a first corresponding relation according to the plurality of groups of sample data and the first compensation voltage corresponding to the sample data.
Selecting a plurality of sets of sample data, including:
selecting a plurality of gray scale binding points, and acquiring data voltage of the sample display panel at any one gray scale binding point as data voltage in each group of sample data.
In some optional embodiments, the selected plurality of gray-scale binding points are the same as the plurality of gray-scale binding points selected by the display panel during gamma debugging;
in some alternative embodiments, the amount of change in the data voltages in each set of sample data is determined based on the difference between the data voltages at any two sets of gray scale binding points.
In some alternative embodiments, the data acquisition module 701 is further configured to: selecting the corresponding sub-pixels with the first duration longer than or equal to the duration threshold value from the sub-pixels.
In some alternative embodiments, the data acquisition module 701 is specifically configured to:
and when the display panel displays the previous frame of picture, acquiring a first data voltage corresponding to the sub-pixel in the target display area and a first duration of the previous frame of picture.
In some alternative embodiments, the fabrication process of the sample transistor is the same as the fabrication process of the transistor of the pixel circuit in the display panel.
In some alternative embodiments, the sample transistor is a drive transistor for a pixel circuit in a sample display panel.
In some alternative embodiments, the sample display panel is fabricated in the same process as the display panel.
Fig. 8 shows a schematic hardware structure of a display device according to an embodiment of the present application.
A processor 801 and a memory 802 storing computer program instructions may be included in the display device.
In particular, the processor 801 may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of embodiments of the present application.
Memory 802 may include mass storage for data or instructions. By way of example, and not limitation, memory 802 may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the above. Memory 802 may include removable or non-removable (or fixed) media, where appropriate. Memory 802 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 802 is a non-volatile solid-state memory.
The memory may include Read Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors) it is operable to perform the operations described with reference to methods in accordance with aspects of the present disclosure.
The processor 801 implements any one of the display driving methods of the above embodiments by reading and executing computer program instructions stored in the memory 802.
In one example, the display device may also include a communication interface 803 and a bus 810. As shown in fig. 8, the processor 801, the memory 802, and the communication interface 803 are connected to each other via a bus 810 and perform communication with each other.
The communication interface 803 is mainly used to implement communication between each module, apparatus, unit and/or device in the embodiments of the present application.
Bus 810 includes hardware, software, or both, coupling components of the display device to each other. By way of example, and not limitation, the buses 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 the above. Bus 810 may include one or more buses, where appropriate. Although embodiments of the present application describe and illustrate a particular bus, the present application contemplates any suitable bus or interconnect.
The display device may be based on the above-described embodiments, thereby implementing the display driving method described in fig. 1 to 6.
In addition, in connection with the display driving method in the above embodiments, embodiments of the present application may be implemented by providing a computer-readable storage medium. The computer readable storage medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the display driving methods of the above embodiments.
It should be clear that the present application is not limited to the particular arrangements and processes described above and illustrated in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions, or change the order between steps, after appreciating the spirit of the present application.
The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and the like. The code segments may be downloaded via computer networks such as the internet, intranets, etc. Examples of "machine-readable media" include non-transitory machine-readable media.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be different from the order in the embodiments, or several steps may be performed simultaneously.
In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.
Claims (14)
1. A display driving method, characterized by comprising:
acquiring a first data voltage corresponding to a sub-pixel when a display panel displays a previous frame of picture and a first duration of the previous frame of picture;
Determining a first compensation voltage corresponding to the first data voltage and the first duration according to a preset first corresponding relation, wherein the first corresponding relation comprises a corresponding relation among the data voltage, the duration and the compensation voltage, the compensation voltage in the first corresponding relation is determined according to a threshold voltage offset of a transistor, the threshold voltage offset is determined according to the data voltage and the duration applied to a grid electrode of the transistor, and the first corresponding relation is obtained according to threshold voltage offsets of the grid electrode of a sample transistor under different data voltages and different durations;
and taking the first compensation voltage as a data voltage compensation value of the sub-pixel to display a current frame picture.
2. The display driving method according to claim 1, wherein the first correspondence relation specifically includes a correspondence relation among a data voltage, a duration, a variation amount of the data voltage, and a compensation voltage,
the method further comprises the steps of:
acquiring initial data voltages corresponding to the sub-pixels under the current frame picture, and determining the variation of the first data voltages according to the initial data voltages;
The determining, according to a preset first correspondence, the first data voltage and a first compensation voltage corresponding to the first duration specifically includes:
and determining the first data voltage, the first duration and a first compensation voltage corresponding to the variation of the first data voltage according to a preset first corresponding relation.
3. The display driving method according to claim 2, wherein the first correspondence relationship is determined according to:
determining a second corresponding relation according to threshold voltage offset of the grid electrode of the sample transistor under different data voltages and different duration time;
selecting a plurality of groups of sample data, wherein each group of sample data comprises data voltage, duration time and variation of the data voltage;
for any group of sample data, determining a threshold voltage offset corresponding to data voltage and duration in the sample data in the second corresponding relation, and taking the threshold voltage offset as a compensation voltage initial value corresponding to the sample data;
analyzing the display effect of a sample display panel under the initial compensation voltage value, if the display effect meets a preset requirement, taking the initial compensation voltage value as the first compensation voltage corresponding to the sample data, and if the display effect does not meet the preset requirement, adjusting the initial compensation voltage value until the display effect of the sample display panel under the adjusted initial compensation voltage value meets the preset requirement, and taking the adjusted initial compensation voltage value as the first compensation voltage corresponding to the sample data;
And determining the first corresponding relation according to a plurality of groups of sample data and the first compensation voltage corresponding to the sample data.
4. A display driving method according to claim 3, wherein said selecting a plurality of sets of sample data comprises:
selecting a plurality of gray scale binding points, and acquiring data voltage of the sample display panel at any one of the gray scale binding points as data voltage in each group of sample data.
5. The display driving method according to claim 4, wherein the selected plurality of gray-scale binding points are the same as the plurality of gray-scale binding points selected by the display panel during gamma adjustment.
6. A display driving method according to claim 3, wherein the amount of change in the data voltages in each of the sets of sample data is determined based on the difference between the data voltages at any two sets of gray scale binding points.
7. The display driving method according to claim 1, wherein before determining the first data voltage and the first compensation voltage corresponding to the first duration according to a preset first correspondence, the method further comprises:
selecting the corresponding sub-pixels of which the first duration is greater than or equal to a duration threshold value in the sub-pixels.
8. The display driving method according to claim 1, wherein the acquiring the first data voltage corresponding to the sub-pixel when the display panel displays the previous frame of picture and the first duration of the previous frame of picture includes:
and when the display panel displays the previous frame of picture, acquiring a first data voltage corresponding to the sub-pixel in the target display area and a first duration of the previous frame of picture.
9. The display driving method according to claim 1, wherein a manufacturing process of the sample transistor is the same as a manufacturing process of a transistor of a pixel circuit in the display panel.
10. The display driving method according to claim 1, wherein the sample transistor is a driving transistor of a pixel circuit in a sample display panel.
11. A display driving method according to claim 3, wherein the sample display panel and the display panel are manufactured by the same process.
12. A display driving apparatus, the apparatus comprising:
the data acquisition module is used for acquiring first data voltage corresponding to the sub-pixel when the display panel displays the previous frame of picture and first duration of the previous frame of picture;
The compensation determining module is used for determining a first compensation voltage corresponding to the first data voltage and the first duration according to a preset first corresponding relation, wherein the first corresponding relation comprises a corresponding relation of the data voltage, the duration and the compensation voltage, the compensation voltage in the first corresponding relation is determined according to a threshold voltage offset of a sample transistor, the threshold voltage offset is related to the data voltage and the duration applied by a grid electrode of the sample transistor, and the first corresponding relation is obtained according to threshold voltage offsets of the grid electrode of the sample transistor under different data voltages and different durations;
and the compensation module is used for taking the first compensation voltage as a data voltage compensation value of the sub-pixel so as to display a current frame picture.
13. A display device, the device comprising: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements the display driving method according to any one of claims 1-11.
14. A computer readable storage medium having stored thereon computer program instructions which when executed by a processor implement the display driving method according to any of claims 1-11.
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