CN110796979B - Driving method and driving device of display panel - Google Patents
Driving method and driving device of display panel Download PDFInfo
- Publication number
- CN110796979B CN110796979B CN201911112681.XA CN201911112681A CN110796979B CN 110796979 B CN110796979 B CN 110796979B CN 201911112681 A CN201911112681 A CN 201911112681A CN 110796979 B CN110796979 B CN 110796979B
- Authority
- CN
- China
- Prior art keywords
- gray
- actual input
- value
- display panel
- gray scale
- 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
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
- G09G3/2003—Display of colours
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The embodiment of the invention discloses a driving method and a driving device of a display panel. The driving method includes: acquiring display data corresponding to at least two gray scales of a display panel; calculating the actual input brightness value of the corresponding gray scale of the display panel according to the display data; calculating actual input brightness values corresponding to all gray scales according to the actual input brightness values corresponding to at least two gray scales; compensating the actual input brightness value to the preset input brightness value of the corresponding gray scale. The technical scheme of the embodiment of the invention can greatly reduce the data to be stored by the display panel while avoiding the mura of the display panel, thereby solving the problem of insufficient storage space caused by the large amount of data to be stored by the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a driving method and a driving device of a display panel.
Background
The panel includes a plurality of pixels, and in the conventional panel process, the non-uniformity of the electrical parameters of the different pixels causes the brightness difference of the panel during the display, i.e., the mura that we can see.
An external compensation method (Demura) is generally used to solve mura in panel display.
When the Demura is used for compensating the mura, in a preprocessing algorithm of the Demura process, the brightness information of a product needs to be accurately output and is used for calculating the brightness difference value compensated by the panel during display. The difference data needs to be stored in the memory of the panel, but different gray scales correspond to different brightness, and the compensation brightness difference value corresponding to each gray scale is different, so that the direct problem is that the data size needing to be stored is very large, and the memory storage space for storing the difference data is not enough.
Disclosure of Invention
The invention provides a driving method and a driving device of a display panel, which are used for realizing the compensation of the brightness of all gray scales and reducing the data volume needing to be stored.
In a first aspect, an embodiment of the present invention provides a method for driving a display panel, including:
acquiring display data corresponding to at least two gray scales of the display panel;
calculating an actual input brightness value of a corresponding gray scale of the display panel according to the display data;
calculating actual input brightness values corresponding to all gray scales according to the actual input brightness values corresponding to at least two gray scales;
and compensating the actual input brightness value to a preset input brightness value of the corresponding gray scale.
In a second aspect, an embodiment of the present invention further provides a driving apparatus for a display panel, including:
the display data acquisition module is used for acquiring display data corresponding to at least two gray scales of the display panel;
the first actual input brightness value calculation module is used for calculating the actual input brightness value of the corresponding gray scale of the display panel according to the display data;
the second actual input brightness value calculation module is used for calculating actual input brightness values corresponding to all gray scales according to the actual input brightness values corresponding to at least two gray scales;
and the compensation module is used for compensating the actual input brightness value to a preset input brightness value corresponding to the gray scale.
According to the embodiment of the invention, the actual input brightness values of all gray scales are calculated through the actual input brightness values corresponding to at least two gray scales, and then the actual input brightness values are compensated to the preset input brightness values corresponding to the gray scales, so that the display panel can realize the compensation of the input brightness values of all gray scales by only storing the actual input brightness values corresponding to at least two gray scales, and the data required to be stored by the display panel can be greatly reduced while the mura of the display panel is avoided, thereby solving the problem that the storage space is insufficient due to the fact that the display panel needs to store a large amount of data.
Drawings
FIG. 1 is a flowchart illustrating a driving method of a display panel according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating a driving method of a display panel according to a second embodiment of the present invention;
FIG. 3 is a diagram of an original image data matrix according to a second embodiment of the present invention;
FIG. 4 is a flowchart of a driving method of a display panel according to a third embodiment of the present invention;
FIG. 5 is a graph of gamma curve adjustment for display brightness versus input for three embodiments of the present invention;
fig. 6 is a schematic structural diagram of a driving apparatus of a display panel according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a driving method of a display panel according to an embodiment of the present invention, where the driving method is applicable to a display panel, and the method can be executed by a driving apparatus of a display panel according to an embodiment of the present invention, and specifically includes the following steps:
step S110, obtaining display data corresponding to at least two gray scales of the display panel;
specifically, the display panel has different gray scales during the display process. Illustratively, the display panel may include 256 gray levels, 0-255 gray levels respectively. The different gray scales correspond to different driving data, so that the display panel has different brightness at different gray scales, namely, different display data. The display data may comprise a display brightness of the display panel, i.e. an actual output brightness value of the display panel.
After the display panel is manufactured, the luminance corresponding to the maximum gray scale of the display panel is a fixed value, and the luminance corresponding to the maximum gray scale can be obtained by a Charge Coupled Device (CCD), that is, a CCD image sensor or the like.
And step S120, calculating the actual input brightness value of the corresponding gray scale of the display panel according to the display data.
Specifically, the display data includes an output luminance value having a correspondence with an actual input luminance value. Illustratively, the relationship of the actual input luminance value to the output luminance value of the display panel satisfies a gamma curve. After the display data is acquired, the output brightness value of the corresponding gray scale can be determined, and then the actual input brightness value of the corresponding gray scale is calculated according to the gamma curve.
Step S130, calculating actual input brightness values corresponding to all gray scales according to the actual input brightness values corresponding to at least two gray scales.
Specifically, different gray scales correspond to different input luminance values. From the gray level 0 to the gray level 255, the actual output luminance value of the display panel gradually increases, and the corresponding input luminance value gradually increases. After the actual input brightness values corresponding to at least two different gray scales are determined, the actual input brightness values corresponding to all the gray scales can be calculated according to the actual input brightness values corresponding to at least two different gray scales, so that the actual input brightness values corresponding to all the gray scales can be obtained only by storing the actual input brightness values corresponding to at least two gray scales.
It should be noted that the actual input luminance values corresponding to all gray scales can be calculated by selecting the actual input luminance values corresponding to at least two gray scales with larger gray scale difference values, so as to improve the accuracy of the calculated actual input luminance values corresponding to all gray scales. For example, the gray scales corresponding to the actual input luminance values corresponding to the two gray scales may be selected as the minimum gray scale and the maximum gray scale, respectively.
Step S140, compensating the actual input brightness value to the preset input brightness value corresponding to the gray scale.
Specifically, after the actual input luminance values corresponding to all the gray scales are calculated, the actual input luminance values are compared with the preset input luminance values, and the actual input luminance values are compensated according to the comparison result, so that the actual input luminance value compensation values correspond to the preset input luminance values of the gray scales. Because the input brightness value and the output brightness value meet the gamma curve, after the input brightness value reaches the preset input brightness value, the output brightness value of the display panel can be the preset output brightness value, and mura of the display panel is avoided.
In the process, the actual input brightness values of all gray scales can be calculated through the actual input brightness values corresponding to at least two gray scales, and then the actual input brightness values are compensated to the preset input brightness values corresponding to the gray scales, so that the display panel can realize the compensation of the input brightness values of all gray scales by only storing the actual input brightness values corresponding to at least two gray scales, the data which need to be stored by the display panel can be greatly reduced while the mura of the display panel is avoided, and the problem that the storage space is insufficient due to the fact that a large amount of data need to be stored by the display panel is solved.
Example two
Fig. 2 is a flowchart of a driving method of a display panel according to a second embodiment of the present invention, which specifically includes the following steps:
step S210, obtaining display data corresponding to at least two gray scales of the display panel.
Step S220, calculating the actual input brightness value of the corresponding gray scale of the display panel according to the display data.
Step S230, calculating actual input luminance values corresponding to all gray scales by a fitting method according to the actual input luminance values corresponding to at least two gray scales.
Specifically, the display panel includes a plurality of pixels, and each pixel can output a luminance value corresponding to a different gray scale. In the driving process of the display panel, each pixel can be compensated respectively, so that the actual brightness value output by each pixel in the display panel is the preset brightness value of the corresponding gray scale. In the following process, a driving process of one pixel is taken as an example to explain the driving process.
Illustratively, when the actual input luminance values corresponding to the at least two gray scales are the actual input luminance values corresponding to the two gray scales, calculating the actual input luminance values corresponding to all the gray scales according to the actual input luminance values corresponding to the at least two gray scales includes:
and calculating the actual input brightness values corresponding to all the gray scales by adopting a straight line fitting method according to the actual input brightness values corresponding to the two gray scales.
FIG. 3 is a diagram of an original image data matrix according to a second embodiment of the present invention, as shown in FIG. 3, a panel takes two gray-scale pictures during compensation to obtain an original image data matrix f (x, y)GhAnd f (x, y)Gl. Wherein, x and y respectively correspond to the pixels arranged in the display panel in x rows and y columns, and f (x, y)GhFor capturing the original image data matrix of the display panel corresponding to the H gray scale picture, f (x, y)GlTo capture the original image data matrix of the display panel corresponding to L gray-scale picturesPixel point (0,0) is used for data analysis, and the coordinates in the original image data matrix corresponding to the two gray-scale pictures are respectively f (0,0)Gh，f(0，0)GlThe actual input luminance values corresponding to the pixel points (0,0) corresponding to the two gray-scale frames are L v _ input (L), L v _ input (h).
According to the two-point calculation straight line parameter formula, the parameters of the stage compensation curve corresponding to the pixel point (0,0) can be calculated as follows:
K＝(Lv_input(H)–Lv_input(L))/(H–L)；
b＝Lv_input(H)–K*H；
through the straight line formed by K, b parameters, we can obtain any one set of actual input brightness values corresponding to all gray scales from 0 to 255.
In the above process, the actual input luminance values corresponding to the two grayscales may be the actual input luminance value corresponding to the maximum grayscale and the actual input luminance value corresponding to the minimum grayscale.
By setting the actual input brightness values corresponding to the two gray scales as the actual input brightness value corresponding to the maximum gray scale and the actual input brightness value corresponding to the minimum gray scale, the error caused by straight line fitting can be reduced as much as possible.
In other embodiments, when the actual input luminance values corresponding to the at least two gray scales may also be actual input luminance values corresponding to the at least three gray scales, calculating actual input luminance values corresponding to all gray scales according to the actual input luminance values corresponding to the at least two gray scales includes:
and calculating the actual input brightness values corresponding to all the gray scales by adopting a curve fitting method according to the actual input brightness values corresponding to at least three gray scales.
Specifically, when the actual input luminance values corresponding to the at least two gray scales are the actual input luminance values corresponding to the plurality of gray scales, the data for calculating the actual input luminance values corresponding to all the gray scales includes a plurality of data, so that the actual input luminance values corresponding to all the gray scales can be calculated by adopting a curve fitting method or a multi-segment straight line fitting method, and errors caused by fitting can be further reduced.
Exemplarily, when the display data is actual input brightness values corresponding to three gray scales, the actual input brightness values corresponding to any gray scale of 0-255 gray scales can be obtained by calculating by adopting a corresponding curve fitting method and calculating parameters a, b and c of a corresponding curve according to a three-point calculation curve parameter formula. The accuracy of the actual input luminance values corresponding to all gray levels calculated from the actual input luminance values corresponding to the three gray levels is higher.
Step S240, compensating the actual input luminance value to a preset input luminance value corresponding to the gray scale.
Specifically, the compensating the actual input luminance value to the preset input luminance value of the corresponding gray scale includes: calculating a compensation input brightness value of the corresponding gray scale according to the actual input brightness value and a preset input brightness value; and compensating the actual input brightness value to the preset input brightness value of the corresponding gray scale according to the compensation input brightness value.
It should be noted that, when the display panel includes a plurality of pixels, each pixel may be compensated, and the actual input luminance value compensation value corresponds to the preset input luminance value of the gray scale, so that the output luminance value of the display panel is the preset output luminance value, and mura of the display panel is avoided.
In the process, the actual input brightness values of all gray scales can be calculated through the actual input brightness values corresponding to at least two gray scales, and then the actual input brightness values are compensated to the preset input brightness values corresponding to the gray scales, so that the display panel can realize the compensation of the input brightness values of all gray scales by only storing the actual input brightness values corresponding to at least two gray scales, the data which need to be stored by the display panel can be greatly reduced while the mura of the display panel is avoided, and the problem that the storage space is insufficient due to the fact that a large amount of data need to be stored by the display panel is solved.
EXAMPLE III
Fig. 4 is a flowchart of a driving method of a display panel according to a third embodiment of the present invention, where the driving method is applicable to a display panel, and the method can be executed by the driving apparatus of a display panel according to the third embodiment of the present invention, and specifically includes the following steps:
step S410, obtaining display data corresponding to at least two gray scales of the display panel;
specifically, acquiring display data corresponding to at least two gray scales of a display panel includes: sequentially acquiring gray values of display frames corresponding to at least two gray levels of the display panel through a camera; when the gray values of the display frame corresponding to the at least two gray levels are acquired, the aperture and the exposure time of the camera are unchanged.
Wherein, the camera can be a CCD camera. The gray-scale value of the display screen is related to the output brightness value of the display panel, the aperture of the camera, the exposure time and the like. In the same gray scale, because the aperture and the exposure time of the camera are different, the obtained gray scale values may be different, and therefore, the gray scale values of the display frame corresponding to the two gray scales are obtained under the condition that the aperture and the exposure time of the camera are kept unchanged. When the display data of the display panel is acquired, the aperture and the exposure time of the camera are ensured to be unchanged by acquiring the display data of different gray scales, so that the output brightness value of the display panel can be determined according to the gray value.
When the CCD camera captures a display screen, the parameters other than the output luminance value of the display panel are not changed.
Step S420, calculating a gamma value according to the display data and the standard brightness value corresponding to the maximum gray scale; wherein, the gamma value is the actual gamma value in the standard gamma formula between the input gray scale and the output brightness of the display panel.
Specifically, when parameters such as the aperture and the exposure time of the camera are ensured to be unchanged, the gray scale value of the display picture corresponds to the output brightness value of the display picture one by one. And the output brightness value and the input brightness value satisfy the gamma curve relationship. After the output brightness values corresponding to the at least two gray scales are obtained, the actual gamma value in the gamma curve can be calculated according to the output brightness values and the gray scales corresponding to the output brightness values.
For example, the display data may include gray values and output luminance values corresponding to different gray levels;
calculating a gamma value according to the display data and the standard brightness value corresponding to the maximum gray scale, including:
and calculating the gamma value according to the gray value corresponding to the different gray scales and the standard brightness value corresponding to the maximum gray scale.
Fig. 5 is a gamma curve adjustment diagram of display brightness and input in the third embodiment of the present invention, as shown in fig. 5, the display brightness and input and output of the panel are adjusted according to the gamma curve, if the output brightness is to be adjusted, the actual input brightness value needs to be calculated correspondingly, and the difference between the actual input brightness value and the preset input brightness value of the corresponding gray scale is obtained.
During the calculation of the compensation data, the gamma value V _ gamma of the panel can be derived according to the standard gamma formula, L and H are two gray scale fixed values respectively.
The following method is that if the Gamma value V _ Gamma between 2 gray levels is calculated through the brightness output under 2 gray levels:
l v _255 is the brightness value of the product at 255 gray scale, which is the standard value of the known product.
After obtaining the Gray level value Gray _ L corresponding to the Gray level of L and the Gray level value Gray _ H corresponding to the Gray level of H, the Gray _ L is set as V _ Gray L, the Gray _ H is set as V _ Gray H, and the Gray level correlation formula can be obtained according to the Gamma standard formula:
Lv_255*(L/255)^V_gamma＝V_grayL
Lv_255*(H/255)^V_gamma＝V_grayH
the following formula can be obtained by conversion:
V_gamma＝lg(V_grayL/V_grayH)/lg(L/H)；
wherein, the gamma value is the actual gamma value in the standard gamma formula between the input gray scale and the output brightness of the display panel.
Step S430, calculating the actual input brightness value of the corresponding gray scale according to the display data and the gamma value.
Specifically, after the gamma value is calculated, an actual input luminance value corresponding to the gray scale may be calculated from the output luminance value and the gamma value. Calculating an actual input brightness value corresponding to the gray scale according to the display data and the gamma value, including:
and calculating the actual input brightness value of the corresponding gray scale according to the output brightness value and the gamma value.
Illustratively, the actual input luminance value corresponding to the gray scale is found as follows:
and if the Output brightness of a certain pixel is L v _ Output and the corresponding Gray scale is Gray _ input, the actual input brightness value corresponding to the Gray scale is:
Lv_input＝((Lv_Output/255)^V_gamma)*Gray_input；
wherein, the actual input brightness value of the corresponding gray scale is calculated according to the output brightness value and the gamma value.
Step S440, calculating actual input brightness values corresponding to all gray scales according to the actual input brightness values corresponding to at least two gray scales.
Step S450, compensating the actual input brightness value to the preset input brightness value corresponding to the gray scale.
In the process, the actual input brightness values of all gray scales can be calculated through the actual input brightness values corresponding to at least two gray scales, and then the actual input brightness values are compensated to the preset input brightness values corresponding to the gray scales, so that the display panel can realize the compensation of the input brightness values of all gray scales by only storing the actual input brightness values corresponding to at least two gray scales, the data which need to be stored by the display panel can be greatly reduced while the mura of the display panel is avoided, and the problem that the storage space is insufficient due to the fact that a large amount of data need to be stored by the display panel is solved.
Example four
Fig. 6 is a schematic structural diagram of a driving apparatus of a display panel according to a fourth embodiment of the present invention. The apparatus may be implemented by hardware and/or software to perform the driving method of the display panel provided by any embodiment of the present invention. As shown in fig. 6, the apparatus includes:
the display data acquisition module 61 is configured to acquire display data corresponding to at least two gray scales of the display panel;
a first actual input luminance value calculating module 62, configured to calculate an actual input luminance value of a corresponding gray scale of the display panel according to the display data;
a second actual input luminance value calculating module 63, which calculates actual input luminance values corresponding to all gray scales according to actual input luminance values corresponding to at least two gray scales;
the compensation module 64 is configured to compensate the actual input luminance value to a preset input luminance value corresponding to the gray scale.
According to the technical scheme of the embodiment of the invention, the actual input brightness values corresponding to all gray scales are calculated by the second actual input brightness value calculation module according to the actual input brightness values corresponding to at least two gray scales, and then the second actual input brightness value calculation module compensates the actual input brightness values to the preset input brightness values corresponding to the corresponding gray scales, so that the display panel can only store the actual input brightness values corresponding to at least two gray scales to realize the compensation of the input brightness values of all gray scales, and the data required to be stored by the display panel can be greatly reduced while the mura of the display panel is avoided, so that the problem of insufficient storage space caused by the fact that the display panel needs to store a large amount of data is solved.
Optionally, the second actual input luminance value calculating module includes:
the second calculation unit is used for calculating actual input brightness values corresponding to all gray scales by a simulation method according to the actual input brightness values corresponding to at least two gray scales;
optionally, the second calculating unit includes:
the second-order calculating subunit is used for calculating actual input brightness values corresponding to all the gray scales by adopting a straight line fitting method according to the actual input brightness values corresponding to the two gray scales;
the actual input brightness values corresponding to the two gray scales are the actual input brightness value corresponding to the maximum gray scale and the actual input brightness value corresponding to the minimum gray scale.
Optionally, the second computing unit further includes:
and the third-order calculating unit is used for calculating the actual input brightness values corresponding to all the gray scales by adopting a curve fitting method according to the actual input brightness values corresponding to the at least three gray scales when the actual input brightness values corresponding to the at least two gray scales are the actual input brightness values corresponding to the at least three gray scales.
Optionally, the display data acquiring module includes:
the display data acquisition submodule is used for sequentially acquiring the gray values of the display pictures corresponding to at least two gray levels of the display panel through the camera; when the gray values of the display frame corresponding to the at least two gray levels are acquired, the aperture and the exposure time of the camera are unchanged.
Optionally, the first actual input luminance value calculating module includes:
the gamma value calculating module is used for calculating a gamma value according to the display data and the standard brightness value corresponding to the maximum gray scale; the gamma value is an actual gamma value in a standard gamma formula between the input gray scale and the output brightness of the display panel;
and the brightness value calculation module is used for calculating the actual input brightness value of the corresponding gray scale according to the display data and the gamma value.
Optionally, the gamma value calculating module includes:
the gamma value operator module is used for calculating a gamma value according to the gray values corresponding to different gray scales and the standard brightness value corresponding to the maximum gray scale;
the luminance value calculation module includes:
and the brightness value calculation submodule is used for calculating the actual input brightness value of the corresponding gray scale according to the output brightness value and the gamma value.
Optionally, the compensation module includes:
the compensation calculation unit is used for calculating a compensation input brightness value of the corresponding gray scale according to the actual input brightness value and the preset input brightness value;
and the compensation execution unit is used for compensating the actual input brightness value to the preset input brightness value of the corresponding gray scale according to the compensation input brightness value.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A method of driving a display panel, comprising:
acquiring display data corresponding to at least two gray scales of the display panel;
calculating an actual input brightness value of a corresponding gray scale of the display panel according to the display data;
calculating actual input brightness values corresponding to all gray scales according to the actual input brightness values corresponding to at least two gray scales;
compensating the actual input brightness value to a preset input brightness value of a corresponding gray scale;
calculating the actual input brightness value of the corresponding gray scale of the display panel according to the display data, wherein the calculation comprises the following steps:
the gamma value is calculated according to the following formula:
V_gamma = lg(V_grayL/ V_grayH) /lg(L / H )；
the gamma value V _ gamma is an actual gamma value in a standard gamma formula between an input gray scale and an output brightness of the display panel, V _ gray L and V _ gray H are respectively a gray value corresponding to a L gray scale and a gray value corresponding to an H gray scale, and L gray scale and H gray scale are respectively two gray scales corresponding to the acquired display data;
calculating the actual input brightness value of the corresponding gray scale of the display panel according to the following formula:
Lv_input = ((Lv_Output/255)^ V_gamma) * Gray_input；
wherein L v _ input is the actual input luminance value corresponding to the Gray scale, L v _ Output is the actual Output luminance value corresponding to the Gray scale, and Gray _ input is the corresponding Gray scale.
2. The method of claim 1, wherein calculating the actual input luminance values for all gray levels according to the actual input luminance values for at least two gray levels comprises:
and calculating actual input brightness values corresponding to all the gray scales by adopting a fitting method according to the actual input brightness values corresponding to at least two gray scales.
3. The method of claim 2, wherein the actual input luminance values corresponding to at least two grayscales are actual input luminance values corresponding to the two grayscales, and calculating the actual input luminance values corresponding to all grayscales according to the actual input luminance values corresponding to the at least two grayscales comprises:
and calculating the actual input brightness values corresponding to all the gray scales by adopting a straight line fitting method according to the actual input brightness values corresponding to the two gray scales.
4. The method of claim 3, wherein the actual input luminance values corresponding to the two grayscales are the actual input luminance value corresponding to the maximum grayscale and the actual input luminance value corresponding to the minimum grayscale.
5. The method of claim 2, wherein the actual input luminance values corresponding to at least two grayscales are actual input luminance values corresponding to at least three grayscales, and calculating the actual input luminance values corresponding to all grayscales according to the actual input luminance values corresponding to at least two grayscales comprises:
and calculating the actual input brightness values corresponding to all the gray scales by adopting a curve fitting method according to the actual input brightness values corresponding to at least three gray scales.
6. The method of claim 1, wherein obtaining display data corresponding to at least two gray levels of the display panel comprises:
sequentially acquiring gray values of display frames corresponding to at least two gray levels of the display panel through a camera; and when the gray values of the display frames corresponding to the at least two gray levels are acquired, the aperture and the exposure time of the camera are unchanged.
7. The method of claim 1, wherein compensating the actual input luminance value to the preset input luminance value corresponding to the gray scale comprises:
calculating a compensation input brightness value of a corresponding gray scale according to the actual input brightness value and a preset input brightness value;
and compensating the actual input brightness value to a preset input brightness value of a corresponding gray scale according to the compensation input brightness value.
8. A driving apparatus of a display panel, comprising:
the display data acquisition module is used for acquiring display data corresponding to at least two gray scales of the display panel;
the first actual input brightness value calculation module is used for calculating the actual input brightness value of the corresponding gray scale of the display panel according to the display data;
the second actual input brightness value calculation module is used for calculating actual input brightness values corresponding to all gray scales according to the actual input brightness values corresponding to at least two gray scales;
the compensation module is used for compensating the actual input brightness value to a preset input brightness value corresponding to the gray scale;
the first actual input luminance value calculation module includes:
a gamma value calculating module for calculating the gamma value according to the following formula:
V_gamma = lg(V_grayL/ V_grayH) /lg(L / H )；
the gamma value V _ gamma is an actual gamma value in a standard gamma formula between an input gray scale and an output brightness of the display panel, V _ gray L and V _ gray H are respectively a gray value corresponding to a L gray scale and a gray value corresponding to an H gray scale, and L gray scale and H gray scale are respectively two gray scales corresponding to the acquired display data;
the brightness value calculating module is used for calculating the actual input brightness value of the corresponding gray scale of the display panel according to the following formula:
Lv_input = ((Lv_Output/255)^ V_gamma) * Gray_input；
wherein L v _ input is the actual input luminance value corresponding to the Gray scale, L v _ Output is the actual Output luminance value corresponding to the Gray scale, and Gray _ input is the corresponding Gray scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911112681.XA CN110796979B (en) | 2019-11-14 | 2019-11-14 | Driving method and driving device of display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911112681.XA CN110796979B (en) | 2019-11-14 | 2019-11-14 | Driving method and driving device of display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110796979A CN110796979A (en) | 2020-02-14 |
| CN110796979B true CN110796979B (en) | 2020-07-31 |
Family
ID=69444740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911112681.XA Active CN110796979B (en) | 2019-11-14 | 2019-11-14 | Driving method and driving device of display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110796979B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539155B (en) * | 2020-04-14 | 2023-10-03 | 华兴源创(成都)科技有限公司 | Method, apparatus, device and storage medium for brightness compensation |
| CN111899689B (en) * | 2020-08-17 | 2021-09-10 | 云谷（固安）科技有限公司 | Brightness compensation method and compensation device of display panel |
| CN112562576B (en) * | 2020-11-12 | 2021-09-03 | 深圳精智达技术股份有限公司 | Display screen optical external compensation method, device and storage medium |
| CN113380177B (en) * | 2021-06-29 | 2022-06-14 | 合肥维信诺科技有限公司 | Adjusting method and device of image acquisition device and compensation method of display panel |
| CN113298739B (en) * | 2021-07-27 | 2021-11-02 | 华兴源创(成都)科技有限公司 | Display repair method, computer device, and computer-readable storage medium |
| CN114283745B (en) * | 2021-12-28 | 2023-08-18 | 昆山国显光电有限公司 | Brightness compensation method for display panel and related device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799081A (en) * | 2017-11-08 | 2018-03-13 | 武汉华星光电半导体显示技术有限公司 | Gamma corrects system and its bearing calibration |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996612A (en) * | 2009-08-12 | 2011-03-30 | 联咏科技股份有限公司 | Correction method for enhancing brightness uniformity of display device and relevant device |
| CN107610649B (en) * | 2017-10-26 | 2020-03-06 | 上海天马有机发光显示技术有限公司 | Optical compensation method and device of display panel |
| CN108877736B (en) * | 2018-05-31 | 2020-03-03 | 昆山国显光电有限公司 | Compensation method and device for eliminating uneven screen brightness |
| CN109903733B (en) * | 2019-04-11 | 2021-03-05 | 京东方科技集团股份有限公司 | Display device and driving method thereof |
-
2019
- 2019-11-14 CN CN201911112681.XA patent/CN110796979B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799081A (en) * | 2017-11-08 | 2018-03-13 | 武汉华星光电半导体显示技术有限公司 | Gamma corrects system and its bearing calibration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110796979A (en) | 2020-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110796979B (en) | Driving method and driving device of display panel | |
| CN109523955B (en) | Pixel compensation method and device, storage medium and display screen | |
| WO2018201535A1 (en) | Method of compensating mura defect of display panel, and display panel | |
| US10373570B2 (en) | Display apparatus and image processing method thereof | |
| CN108766372B (en) | Method for improving mura phenomenon of display panel | |
| KR100953768B1 (en) | Compensation for adjacent pixel interdependence | |
| US9837011B2 (en) | Optical compensation system for performing smear compensation of a display device and optical compensation method thereof | |
| CN105702218A (en) | Display apparatus, method of driving the same and vision inspection apparatus for the same | |
| US10839729B2 (en) | Apparatus for testing display panel and driving method thereof | |
| US10089910B2 (en) | Image display device, correction data generation method, and image correction device and method, as well as image correction system | |
| CN113724652B (en) | Compensation method and device for Mura of OLED display panel and readable medium | |
| CN105103539A (en) | Correction data generation method, correction data generation system, and image quality adjustment technique using correction data generation method and correction data generation system | |
| KR20160026680A (en) | Luminance compensation equipment and system and luminance compensation method | |
| CN109949744B (en) | Gamma voltage correction method and device | |
| CN113920917B (en) | Display panel compensation method and compensation device | |
| KR20200079921A (en) | Dmura compensation driver | |
| KR20190094286A (en) | Non-uniformity Compensation System, Non-uniformity Compensation Device and Panel Drive Circuit | |
| CN113140186A (en) | Display panel compensation method and display device | |
| WO2022222176A1 (en) | Display apparatus and driving method therefor, and electronic device | |
| CN114093292A (en) | Brightness parameter correction method, device and equipment and brightness compensation system | |
| JP2005150779A (en) | Method for calculating display characteristics correction data of image display apparatus, display characteristic correction data program, and apparatus for calculating display characteristics correction data | |
| US20240062696A1 (en) | Demura method for display panel | |
| JPWO2020136730A1 (en) | Corrected image generation system, image control program, and recording medium | |
| WO2018154728A1 (en) | Display device | |
| KR102153567B1 (en) | Apparatus and method for compensating of brightness deviation |
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 |