CN113380170B - 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 PDFInfo
- Publication number
- CN113380170B CN113380170B CN202110613728.1A CN202110613728A CN113380170B CN 113380170 B CN113380170 B CN 113380170B CN 202110613728 A CN202110613728 A CN 202110613728A CN 113380170 B CN113380170 B CN 113380170B
- Authority
- CN
- China
- Prior art keywords
- display panel
- refresh rate
- offset
- display
- compensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000027455 binding Effects 0.000 claims abstract description 51
- 238000009739 binding Methods 0.000 claims abstract description 51
- 239000003086 colorant Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 241001270131 Agaricus moelleri Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
-
- 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
- G09G3/2007—Display of intermediate tones
Landscapes
- 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)
Abstract
The application discloses a display compensation method and device of a display panel, a display device and a medium. The method comprises the steps of obtaining a reference compensation parameter corresponding to each gray scale binding point of a display panel under a reference refresh rate and an offset coefficient of a target refresh rate relative to the reference refresh rate; and when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the offset coefficient and the reference compensation parameter. According to the embodiment of the application, the problem that under compensation or over compensation exists at certain refresh rate can be solved.
Description
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, the existing compensation method is to share a set of compensation data with different refresh rates, so that under certain refresh rates, there is a problem of insufficient compensation or excessive compensation.
Disclosure of Invention
The embodiment of the application provides a display compensation method, a display compensation device, a display device and a display compensation medium of a display panel, which can solve the problem of insufficient compensation or excessive compensation under certain 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 compensation parameter corresponding to each gray scale binding point of a display panel under a reference refresh rate and an offset coefficient of a target refresh rate relative to the reference refresh rate; and when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the offset coefficient and the reference compensation parameter.
In a possible implementation manner of the first aspect, the calculation formula of the offset coefficient is:
wherein α represents the offset coefficient, L mx A brightness value L representing a brightness value when the display panel displays a picture with a gray scale of m at the target refresh rate mn The gamma value represents a gamma value of the display panel.
In a possible implementation manner of the first aspect, the compensating the displayed picture according to a product of the offset coefficient and the reference compensation parameter includes:
calculating a first product of the offset coefficient and the reference gain coefficient and a second product of the offset coefficient and the reference offset;
and compensating the displayed picture according to the first product and the second product.
In a possible implementation manner of the first aspect, the compensating the displayed picture according to the first product and the second product includes:
calculating a corresponding compensated gray scale value when the display panel displays a picture with the gray scale m at the target refresh rate according to the following formula:
Y＝α*(Gain*m+offset)
wherein Y represents a compensated gray scale value corresponding to a gray scale m at the target refresh rate, α represents the offset coefficient, gain represents the reference Gain coefficient, offset represents the reference offset amount, α × Gain represents the first product, and α × offset represents the second product;
and displaying the picture with the gray scale of m by using the compensated gray scale value so as to compensate the displayed picture.
In a possible implementation manner of the first aspect, the display panel includes a plurality of pixels distributed in an array, each of the pixels includes sub-pixels of at least three colors, i × j sub-pixels of the same color share one shift coefficient at the same gray level, i ≧ 1, j ≧ 1, and i × j ≧ 2.
In a possible embodiment of the first aspect, i × j sub-pixels of the same color are adjacent.
In a possible implementation manner of the first aspect, the offset coefficient shared by i × j sub-pixels of the same color at the same gray scale is a mean value of the offset coefficients corresponding to the i × j sub-pixels of the same color at the same gray scale.
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 reference compensation parameters corresponding to each gray scale binding point of the display panel under a reference refresh rate and an offset coefficient of a target refresh rate relative to the reference refresh rate;
and the compensation module is used for compensating the displayed picture according to the product of the offset coefficient and the reference compensation parameter when the display panel displays at the target refresh rate.
In a possible implementation manner of the second aspect, the display panel includes a plurality of pixels distributed in an array, each of the pixels includes sub-pixels of at least three colors, and the display compensation apparatus further includes:
and the storage module is used for storing the reference compensation parameters corresponding to each gray scale of the display panel under the reference refresh rate and the offset coefficients of the target refresh rate relative to the reference refresh rate under each gray scale, and is used for storing one offset coefficient for sharing i x j sub-pixels with the same color under the same gray scale, wherein i is more than or equal to 1, j is more than or equal to 1, and i x j is more than or equal to 2.
In a third aspect, an embodiment of the present application provides a display device, including 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 first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program or instructions are stored, and when the program or instructions are executed by a processor, the program or instructions implement the steps of the display compensation method for a display panel according to the embodiment of the first aspect.
According to the display compensation method, the display compensation device, the display device and the medium for the display panel, the same set of compensation parameters is not shared by the plurality of refresh rates of the display panel, but according to the product of the reference compensation parameters corresponding to the gray scale binding points of the display panel under the reference refresh rate and the offset coefficient of the target refresh rate relative to the reference refresh rate, 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 compensation parameters when being displayed at different refresh rates, the problem of insufficient compensation or excessive compensation under certain refresh rates is avoided, and the display quality is improved.
Drawings
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 schematic diagram illustrating a gamma curve of a display panel according to an embodiment of the present disclosure;
FIG. 3 is an enlarged view of region Q of FIG. 2;
FIG. 4 is a schematic structural diagram of a display compensation apparatus of a display panel according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a display compensation apparatus of a display panel according to another embodiment of the present disclosure;
fig. 6 is a schematic diagram illustrating a hardware structure 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 phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
With the development of display technologies, the types of screen refresh rates that can be supported by the display module 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 ensure the display effect of the display module under each screen refresh rate, in the related art, a plurality of refresh rates share the same set of Demura compensation data. For example, the display panel is Demura compensated at a refresh rate of 90Hz to obtain Demura compensated data at 90Hz, and then the display panel shares the Demura compensated data at 90Hz when displaying at refresh rates of 144Hz, 120Hz, 90Hz, 60Hz, and the like. The inventors of the present application have found that sharing the same set of Demura compensation data by multiple refresh rates can lead to problems of insufficient or excessive compensation at certain refresh rates.
In order to solve the above problems, 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 provided, and the following description will be made 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 compensation parameter corresponding to each gray scale binding point of the display panel under the reference refresh rate and an offset coefficient of the target refresh rate relative to the reference refresh rate.
And 120, when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the offset coefficient and the reference compensation parameter.
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, 90Hz is the reference refresh rate, and the target refresh rate may be any one of 60Hz, 120Hz, and 144Hz.
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, in 256 gray levels of 0 to 255, 20 to 40 gray levels may be selected at intervals as gray level bindings to determine the reference compensation parameters, resulting in corresponding reference compensation parameters for the gray level bindings. The reference compensation parameters corresponding to the gray scales other than the gray scale binding points can be obtained by a linear interpolation method or other methods according to the reference compensation parameters corresponding to the gray scale binding points, which is not limited herein.
For example, if the reference compensation parameters corresponding to the gray scales other than the gray scale binding points by using the linear interpolation method are selected, after the gray scale binding points are selected, the gray scale binding points may be sorted according to the descending order of the gray scale values corresponding to the gray scale binding points, the (n + 1) th gray scale binding point and the nth gray scale binding point are taken as examples, and the reference compensation parameters may include a reference Gain coefficient Gain and a reference offset, and the reference Gain coefficient corresponding to the gray scale g other than the gray scale binding points may be equal to
Wherein, gain n+1 Represents the reference Gain coefficient, gain, corresponding to the (n + 1) th gray scale binding point n And the reference gain 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. Similarly, the reference offset of the reference compensation coefficient corresponding to the gray level g except the gray level binding point can be equal to or greater than or equal to->
Wherein the offset n+1 Indicates the reference offset, corresponding to the (n + 1) th gray-scale binding point n And indicating the reference offset corresponding to the nth gray scale binding point.
For the sake of convenience of distinction, the compensation parameters corresponding to the gray scale binding points of the display panel at the reference refresh rate are referred to as reference compensation parameters. In addition, the specific numerical value of the offset coefficient of the target refresh rate with respect to the reference refresh rate may be different for each gray-scale binding point. For example, when the gray scale corresponding to the gray scale binding point is 255, the offset coefficient of the target refresh rate with respect to the reference refresh rate is α 1, when the gray scale corresponding to the gray scale binding point is 196, the offset coefficient of the target refresh rate with respect to the reference refresh rate is α 2, and when the gray scale corresponding to the gray scale binding point is 150, the offset coefficient of the target refresh rate with respect to the reference refresh rate is α 3, and α 1, α 2, and α 3 may be unequal.
For example, the product of the offset coefficient and the reference compensation parameter may be used as a target compensation parameter corresponding to each gray scale binding point of the display panel at the target refresh rate, and then the displayed picture may be compensated with the target compensation parameter when the display panel is displayed at the target refresh rate. It will be appreciated that when the display panel is displayed at the reference refresh rate, the displayed picture is compensated directly with the reference compensation parameters.
According to the embodiment of the application, the plurality of refresh rates of the display panel do not share the same group of compensation parameters, but the displayed picture is compensated according to the product of the reference compensation parameters corresponding to the gray scale binding points of the display panel under the reference refresh rate and the offset coefficient of the target refresh rate relative to the reference refresh rate when the display panel is displayed at the target refresh rate, so that the display panel can use different compensation parameters when being displayed at different refresh rates, the problem of insufficient or excessive compensation under certain refresh rates is avoided, and the display quality is improved.
In some alternative embodiments, before step 110, a reference compensation parameter corresponding to each gray-scale binding point of the display panel at a reference refresh rate and an offset coefficient of the target refresh rate relative to the reference refresh rate may be determined, and the determined reference compensation parameter and the offset coefficient may be stored in a storage module of the display panel.
For any gray scale binding point, the step of determining the reference compensation parameter corresponding to the gray scale binding point of the display panel at the reference refresh rate may specifically include: setting an initial reference compensation parameter, and judging whether uneven display exists when the display panel displays the gray scale binding point picture at a reference refresh rate; if the display unevenness exists, the initial reference compensation parameter is adjusted until the display unevenness does not exist when the display panel displays the gray scale binding point picture at the initial reference refresh rate under the adjusted reference compensation parameter, and the adjusted reference compensation parameter can be used as the final corresponding reference compensation parameter of the gray scale binding point.
Illustratively, the reference refresh rate is 90Hz and the gray level binding may be 32 gray levels. The display panel may include at least three colors of sub-pixels. For example, the display panel includes red, green and blue sub-pixels, and reference compensation parameters corresponding to gray scale binding points of the sub-pixels of each color at a reference refresh rate may be determined respectively. For example, a 32-gray-scale red picture may be input into the display panel, and an initial reference compensation parameter corresponding to the red sub-pixel at 32 gray scales is set, so that the display panel performs a refresh display at a reference refresh rate of 90 Hz. Illustratively, the initial compensation parameters may be set empirically. Then, an optical measurement device, such as a color analyzer CA310 or a color analyzer CA410, may be used to measure the luminance value of each red sub-pixel of the display panel, and analyze whether there is display unevenness (mura) in the display picture, if there is no display unevenness, the set initial reference compensation parameter is the final reference compensation parameter; and if the display unevenness exists, adjusting the numerical value of the initial reference compensation parameter until the display unevenness does not exist in the display picture under the numerical value of the adjusted reference compensation parameter, and then the adjusted reference compensation parameter is the final compensation parameter. The determination process of the reference compensation parameter for the gray level binding point with other values can be the same as above, and the determination process of the reference compensation parameter for the sub-pixel with other colors can also be the same as above.
In addition, since the red, green and blue sub-pixels of the display panel have different light-emitting efficiencies, the red, green and blue sub-pixels may have different specific values of the reference compensation parameters respectively corresponding to the same gray level binding point, and the sub-pixels at different positions of the same color may have different specific values of the reference compensation parameters respectively corresponding to the same gray level binding point. The present application does not limit the specific numerical values of the reference compensation parameters corresponding to the sub-pixels at each position of each color.
For example, the reference compensation parameter may include a reference Gain coefficient Gain and a reference offset. For example, if the gray level tie point is m, the compensated gray level value = Gain m + offset corresponding to the gray level tie point m at the reference refresh rate of the display panel.
Of course, the reference compensation parameter may be a compensated gray scale value b, and then the compensated gray scale value = m + b corresponding to the gray scale tie point m of the display panel at the reference refresh rate. It is understood that b may be negative or positive.
For example, the offset coefficient of the target refresh rate relative to the reference refresh rate may be set directly empirically. For example, in the case where the target refresh rate is larger than the reference refresh rate, if more compensation is necessary when the display panel is displayed at the target refresh rate, the offset coefficient may be set to be larger than 1, and in the case where the target refresh rate is smaller than the reference refresh rate, if less compensation is necessary when the display panel is displayed at the target refresh rate, the offset coefficient may be set to be smaller than 1. The above are only some examples and are not intended to limit the present application.
In some alternative embodiments, the offset coefficient may be determined according to equation (1) below:
where α represents the offset coefficient, L mx A luminance value L representing a picture with a gray level m displayed on the display panel at a target refresh rate mn The gamma value represents the gamma value of the display panel. For example, γ may be 2.2.
In some alternative embodiments, the offset coefficient determined according to the above equation (1) may be stored in a storage module of the display panel before step 110.
The above formula (1) can be derived from the formulae (2) to (6):
taking the display panel as an 8-bit display panel as an example, the gray scale range of the display panel is 0-255, referring to fig. 2 and 3, in fig. 2 and 3, curve 1 represents the target gamma curve corresponding to the display panel, curve 2 represents the actual gamma curve when the display panel is displayed at the reference refresh rate n, and curve 3 represents the actual gamma curve when the display panel is displayed at the target refresh rate x. Wherein L is m Indicating a target brightness value when the display panel displays a picture with a gray scale of m at an arbitrary refresh rate, L indicating a target brightness value when the display panel displays a picture with a gray scale of 255 at an arbitrary refresh rate, G m Representing a Gray level of m, gray representing a Gray level of 255 mn Represents a compensated gray level value, G, corresponding to the gray level m at the reference refresh rate mx And the compensated gray scale value corresponding to the gray scale m at the target refresh rate is shown.
The following equations (2) to (4) show that:
the following equations (5) and (6) show that:
then
It can be seen that the compensation parameters corresponding to the gray scale m at the reference refresh rate and the target refresh rate are different.
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 offset coefficient of the target refresh rate relative to the reference refresh rate is accurately determined according to the formula (1).
In some alternative embodiments, the reference compensation parameter may include the reference Gain coefficient Gain and the reference offset, as described above. In step 120, compensating the displayed picture according to the product of the offset coefficient and the reference compensation parameter may specifically include: calculating a first product of the offset coefficient and the reference gain coefficient, and a second product of the offset coefficient and the reference offset; and compensating the displayed picture according to the first product and the second product.
When the reference compensation parameter includes the reference Gain coefficient Gain and the reference offset amount offset, it is possible to perform better compensation when the display panel is displayed at the reference refresh rate. In addition, in the embodiment of the application, not only the reference gain coefficient is offset to obtain the target gain coefficient of the display panel at the target refresh rate, but also the reference offset is offset to obtain the target offset of the display panel at the target refresh rate, so that the compensation parameter of the display panel at the target refresh rate is correct. If only one of the reference gain coefficient and the reference offset is offset, the compensation parameters of the display panel at the target refresh rate are incorrect, and the problem that the compensation of the display panel at the target refresh rate is insufficient or excessive can still be caused.
In some optional embodiments, compensating the displayed picture according to the first product and the second product may specifically include: calculating a corresponding compensated gray scale value when the display panel displays a picture with the gray scale m at the target refresh rate according to the following formula (8); and displaying the picture with the gray scale of m by using the compensated gray scale value so as to compensate the displayed picture.
Y＝α*(Gain*m+offset) (8)
Wherein, Y represents a compensated gray scale value corresponding to the gray scale m at the target refresh rate, α represents an offset coefficient, gain represents a reference Gain coefficient, offset represents a reference offset amount, α × Gain represents a first product, and α × offset represents a second product.
It can be understood that the picture with the gray scale m is the corresponding gray scale of the picture itself. The gray scale and the data voltage have a corresponding relationship, for example, the gray scale m1 corresponds to the data voltage Vdata1, the gray scale m2 corresponds to the data voltage Vdata2, and the gray scale m3 corresponds to the data voltage Vdata 3. And displaying the picture with the gray scale of m by using the compensated gray scale value, and providing the data voltage corresponding to the compensated gray scale value Y to the sub-pixels of the display panel to enable the display panel to display the picture with the gray scale of m.
According to the embodiment of the application, the display panel can display the picture at the correct gray scale under the target refresh rate, and the problem of insufficient compensation or excessive compensation under the target refresh rate is avoided.
In some alternative embodiments, the offset coefficient look-up table LUT may be proposed according to the offset coefficient α corresponding to different target refresh rates α Look up the offset coefficient in a table LUT α And a storage module for storing the data to the display panel.
While storing respective target refresh rate offset coefficient look-up tables LUT α The display panel includes a plurality of pixels distributed in an array, each pixel including at least three color sub-pixels. For example, each pixel of the display panel includes three color sub-pixels, and in the case that each sub-pixel corresponds to one shift coefficient, the stored data amount = the resolution x 3 x n of the display panel, where n is the number of the target refresh rate. For example, if 90Hz is the reference refresh rate, 144Hz, 120Hz, and 60Hz are the target refresh rates, n is 3.
Lookup table LUT for reducing respective target refresh rate offset coefficients α In the occupied storage space, i and j sub-pixels with the same color can share one offset coefficient under the same gray scale, i is more than or equal to 1, j is more than or equal to 1, and i and j is more than or equal to 2. That is, only one shift coefficient may be stored for the same color i x j sub-pixels to share in the same gray level.
Illustratively, the values of i, j may be set according to the actual mura condition for different target refresh rates. For example, in the case where mura is less severe, the values of i, j may be set large.
In some alternative embodiments, i x j sub-pixels of the same color are adjacent. For example, if i and j are both 3, nine sub-pixels in three rows and three columns representing the same color share one offset coefficient.
For example, equation (9) represents the amount of data before compression, and equation (10) represents the amount of data after compression:
it can be seen that, in the case that i × j sub-pixels of the same color can share one shift coefficient under the same gray scale, the stored data amount = resolution × 3 × n/(i × j) of the display panel, and the data amount to be stored can be compressed to a greater extent and the storage space to be occupied can be reduced relative to the stored data amount = resolution × 3 × n of the display panel.
In some alternative embodiments, the shift coefficients shared by i × j sub-pixels of the same color at the same gray level are the average values of the shift coefficients corresponding to the i × j sub-pixels of the same color at the same gray level.
Still taking i and j as 3 as an example, the offset coefficient shared by the nine sub-pixels in three rows and three columns with the same color may be the average value of the offset coefficients corresponding to the nine sub-pixels under the same gray scale.
For example, the shift coefficients corresponding to i × j sub-pixels of the same color at the same gray level may be determined according to the above formula (1), then the sum of the shift coefficients corresponding to i × j sub-pixels of the same color at the same gray level is calculated, and the ratio of the sum of the shift coefficients corresponding to i × j sub-pixels of the same color at the same gray level to i × j is used as the mean value of the shift coefficients corresponding to i × j sub-pixels of the same color at the same gray level.
The average value is used as the common offset coefficient of the i x j sub-pixels with the same color under the same gray scale, the actual display condition of each sub-pixel can be considered, and therefore each sub-pixel can be well compensated.
The embodiment of the application also provides a display compensation device of the display panel. Fig. 4 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. 4, the display compensation apparatus 400 of the display panel according to the embodiment of the present disclosure includes a data obtaining module 401 and a compensation module 402.
The data acquisition module 401 is configured to acquire a reference compensation parameter corresponding to each gray scale binding point of the display panel at a reference refresh rate, and an offset coefficient of a target refresh rate relative to the reference refresh rate;
and a compensation module 402, configured to compensate the displayed picture according to a product of the offset coefficient and the reference compensation parameter when the display panel is displayed at the target refresh rate.
According to the embodiment of the application, the plurality of refresh rates of the display panel do not share the same group of compensation parameters, but the displayed picture is compensated according to the product of the reference compensation parameters corresponding to the gray scale binding points of the display panel under the reference refresh rate and the offset coefficient of the target refresh rate relative to the reference refresh rate when the display panel is displayed at the target refresh rate, so that the display panel can use different compensation parameters when being displayed at different refresh rates, the problem of insufficient or excessive compensation under certain refresh rates is avoided, and the display quality is improved.
In some alternative embodiments, the offset coefficient is calculated by the formula:
wherein α represents an offset coefficient, L mx A luminance value L representing a picture with a gray level m displayed on the display panel at a target refresh rate mn Indicating display panel refresh on a baselineThe gamma value of the display panel is represented by gamma.
In some optional embodiments, the compensation module 402 is specifically configured to:
calculating a first product of the offset coefficient and the reference gain coefficient, and a second product of the offset coefficient and the reference offset;
and compensating the displayed picture according to the first product and the second product.
In some optional embodiments, the compensation module 402 is specifically configured to:
calculating a corresponding compensated gray scale value when the display panel displays a picture with the gray scale m at the target refresh rate according to the following formula:
Y＝α*(Gain*m+offset)
wherein, Y represents a compensated gray scale value corresponding to the gray scale m at the target refresh rate, α represents an offset coefficient, gain represents a reference Gain coefficient, offset represents a reference offset amount, α × Gain represents a first product, and α × offset represents a second product;
and displaying the picture with the gray scale of m by using the compensated gray scale value so as to compensate the displayed picture.
As shown in fig. 5, the display compensation apparatus further includes:
the storage module 403 is configured to store a reference compensation parameter corresponding to each gray scale of the display panel at the reference refresh rate and an offset coefficient of a target refresh rate relative to the reference refresh rate at each gray scale, and store an offset coefficient for i × j sub-pixels of the same color to share at the same gray scale, where i is greater than or equal to 1, j is greater than or equal to 1, and i × j is greater than or equal to 2.
In some alternative embodiments, i x j sub-pixels of the same color are adjacent.
In some alternative embodiments, the shift coefficients shared by i × j sub-pixels of the same color at the same gray level are the average values of the shift coefficients corresponding to the i × j sub-pixels of the same color at the same gray level.
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 operating system, an ios operating system, or other possible operating systems, which is not specifically limited in the embodiment of the present application.
Fig. 6 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.
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. 6, 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 illustrated with respect to embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
The display device can execute the display compensation method of the display panel in the embodiment of the application, thereby realizing the display compensation method of the display panel and the display compensation device of the display panel described in conjunction with fig. 1 and 4.
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 compensation parameter corresponding to each gray scale binding point of a display panel under a reference refresh rate and an offset coefficient of a target refresh rate relative to the reference refresh rate;
when the display panel displays at the target refresh rate, compensating the displayed picture according to the product of the offset coefficient and the reference compensation parameter;
the reference compensation parameter includes a reference gain coefficient and a reference offset, and the compensating the displayed picture according to the product of the offset coefficient and the reference compensation parameter includes:
calculating a first product of the offset coefficient and the reference gain coefficient and a second product of the offset coefficient and the reference offset;
and compensating the displayed picture according to the first product and the second product.
2. The display compensation method of claim 1, wherein the offset coefficient is calculated by the following formula:
wherein α represents the offset coefficient, L mx A brightness value L representing a brightness value when the display panel displays a picture with a gray scale of m at the target refresh rate mn The gamma value represents a gamma value of the display panel.
3. The method according to claim 1, wherein the compensating the displayed picture according to the first product and the second product comprises:
calculating a corresponding compensated gray scale value when the display panel displays a picture with the gray scale m at the target refresh rate according to the following formula:
Y＝α*(Gain*m+offset)
wherein Y represents a compensated gray level value corresponding to the gray level m at the target refresh rate, α represents the offset coefficient, gain represents the reference Gain coefficient, offset represents the reference offset amount, α × Gain represents the first product, and α × offset represents the second product;
and displaying the picture with the gray scale of m by using the compensated gray scale value so as to compensate the displayed picture.
4. The method of claim 1, wherein the display panel comprises a plurality of pixels distributed in an array, each of the pixels comprises sub-pixels of at least three colors, i × j sub-pixels of the same color share one shift coefficient at the same gray level, i ≧ 1, j ≧ 1, and i × j ≧ 2.
5. The display compensation method of claim 4, wherein i x j sub-pixels of the same color are adjacent.
6. The display compensation method of claim 4, wherein the shift coefficient shared by the i × j sub-pixels of the same color at the same gray level is an average of the shift coefficients respectively corresponding to the i × j sub-pixels of the same color at the same gray level.
7. A display compensation apparatus for a display panel, comprising:
the data acquisition module is used for acquiring reference compensation parameters corresponding to each gray scale binding point of the display panel under a reference refresh rate and offset coefficients of a target refresh rate relative to the reference refresh rate, wherein the reference compensation parameters comprise reference gain coefficients and reference offset;
a compensation module for calculating a first product of the offset coefficient and the reference gain coefficient and a second product of the offset coefficient and the reference offset according to a product of the offset coefficient and the reference compensation parameter when the display panel is displayed at the target refresh rate; and compensating the displayed picture according to the first product and the second product.
8. The display compensation apparatus of claim 7, wherein the display panel comprises a plurality of pixels distributed in an array, each of the pixels comprises at least three color sub-pixels, and the display compensation apparatus further comprises:
and the storage module is used for storing the reference compensation parameters corresponding to each gray scale of the display panel under the reference refresh rate and the offset coefficients of the target refresh rate relative to the reference refresh rate under each gray scale, and is used for storing one offset coefficient for sharing i x j sub-pixels with the same color under the same gray scale, wherein i is more than or equal to 1, j is more than or equal to 1, and i x j is more than or equal to 2.
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 6.
10. A computer-readable storage medium, on which a program or instructions are stored, which when executed by a processor, carry out the steps of the method of display compensation of a display panel according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110613728.1A CN113380170B (en) | 2021-06-02 | 2021-06-02 | Display compensation method and device of display panel, display device and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110613728.1A CN113380170B (en) | 2021-06-02 | 2021-06-02 | Display compensation method and device of display panel, display device and medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113380170A CN113380170A (en) | 2021-09-10 |
| CN113380170B true CN113380170B (en) | 2023-03-24 |
Family
ID=77575425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110613728.1A Active CN113380170B (en) | 2021-06-02 | 2021-06-02 | Display compensation method and device of display panel, display device and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113380170B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113990232B (en) * | 2021-10-18 | 2023-11-28 | Tcl华星光电技术有限公司 | Display panel picture adjustment method and device, server and storage medium |
| CN113963672B (en) * | 2021-11-05 | 2023-02-24 | 惠州华星光电显示有限公司 | Display brightness adjusting method and device, electronic equipment and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021759A (en) * | 2014-05-30 | 2014-09-03 | 京东方科技集团股份有限公司 | Luminance supplementing method and device for display device, and display device |
| CN109147668B (en) * | 2018-09-25 | 2020-08-04 | 京东方科技集团股份有限公司 | External compensation method of display panel, driving unit and display panel |
| CN109587468B (en) * | 2019-01-02 | 2021-05-07 | 京东方科技集团股份有限公司 | Image pixel correction method and system |
| CN111199713A (en) * | 2020-03-05 | 2020-05-26 | 苹果公司 | Display with multiple refresh rate modes |
| CN112133239A (en) * | 2020-09-27 | 2020-12-25 | 昆山国显光电有限公司 | Compensation voltage determination method and device and display device |
-
2021
- 2021-06-02 CN CN202110613728.1A patent/CN113380170B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113380170A (en) | 2021-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112530347B (en) | Method, device and equipment for determining compensation gray scale | |
| CN111161691B (en) | Compensation method and compensation device for display screen and display device | |
| CN108766372B (en) | Method for improving mura phenomenon of display panel | |
| US20210049977A1 (en) | Pixel rendering method, image rendering method, rendering apparatus, and display apparatus | |
| CN112133239A (en) | Compensation voltage determination method and device and display device | |
| CN111816113A (en) | Brightness compensation method, device and equipment of display panel | |
| US9734773B2 (en) | Display improvement method and apparatus for liquid crystal display panel | |
| CN113380170B (en) | Display compensation method and device of display panel, display device and medium | |
| CN110648627B (en) | Mura phenomenon compensation method, compensation device, display device and electronic equipment | |
| CN107024337B (en) | Measurement method and its measuring system | |
| US9368055B2 (en) | Display device and driving method thereof for improving side visibility | |
| US9728160B2 (en) | Image processing method of a display for reducing color shift | |
| CN114283745B (en) | Brightness compensation method for display panel and related device | |
| US20170193929A1 (en) | Driving method and driving device of liquid crystal panel | |
| CN114241997B (en) | Brightness compensation method of display panel and related device | |
| CN114981873A (en) | Gamma correction method and device, electronic device and readable storage medium | |
| CN114898714B (en) | Brightness compensation method, device, equipment and medium | |
| CN114267279B (en) | Compensation gray level determining method, device and equipment | |
| CN114495812B (en) | Display panel brightness compensation method and device, electronic equipment and readable storage medium | |
| CN110490838B (en) | Method and device for processing boundaries of areas with different resolutions of display panel | |
| CN117496884A (en) | Brightness adjusting method of display device and display device | |
| CN109308874B (en) | Display screen brightness adjusting method and device | |
| CN113504992B (en) | Compensation data compression method, compensation method, device and equipment of display panel | |
| CN112365840A (en) | Display panel compensation method and device and display device | |
| CN115831053B (en) | Display screen aging compensation method, device, equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |