CN114582266A - Method and device for obtaining compensation parameters of display panel - Google Patents
Method and device for obtaining compensation parameters of display panel Download PDFInfo
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Abstract
The embodiment of the invention provides a method and a device for obtaining compensation parameters of a display panel, which can improve the compensation precision of the display panel. The compensation parameter obtaining method comprises the following steps: setting M sections of first brightness values and N-M sections of second brightness values in N sections of display brightness values, wherein the N sections of display brightness values respectively have corresponding section numbers, N is a positive integer larger than 2, and M is a positive integer larger than 1; respectively acquiring compensation parameters corresponding to the first brightness values according to the M sections of image data under the first brightness values; generating a fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the obtained compensation parameters; and calculating to obtain the compensation parameters corresponding to the second brightness values according to the fitting curve and the segment numbers corresponding to the second brightness values.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a method and a device for acquiring compensation parameters of a display panel.
[ background of the invention ]
Due to the influence of the electrical problem of the transistor, the manufacturing process of the light emitting device, and other factors, the display panel has a more obvious uneven display phenomenon, i.e., a Mura phenomenon, when displaying a picture. To solve this problem, the light emitting brightness of the display panel can be compensated by two ways, i.e., internal compensation and external compensation. The internal compensation is realized by self-building a detection compensation circuit in the display panel, and the external compensation is realized by utilizing an external detection device to identify display difference and eliminate the difference through optical detection or electrical detection.
In the existing external compensation mode, compensation parameters are usually obtained according to detection pictures under 2-3 specific display brightness values, and then compensation parameters corresponding to other display brightness values are calculated through a linear interpolation algorithm. However, in practical applications, the compensation parameters corresponding to different display luminance values may not conform to a linear relationship, and therefore, the manner of the compensation parameters calculated in this manner does not conform to the characteristics of the display device, and thus, the problem of insufficient compensation or over compensation is easily caused.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a method and an apparatus for obtaining compensation parameters of a display panel, which can improve compensation accuracy of the display panel.
In one aspect, an embodiment of the present invention provides a method for obtaining compensation parameters of a display panel, including:
setting M sections of first brightness values and N-M sections of second brightness values in N sections of display brightness values, wherein the N sections of display brightness values respectively have corresponding section numbers, N is a positive integer larger than 2, and M is a positive integer larger than 1;
respectively acquiring compensation parameters corresponding to the first brightness values according to the M sections of image data under the first brightness values;
generating a fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the obtained compensation parameters;
and calculating to obtain a compensation parameter corresponding to each second brightness value according to the fitting curve and the segment number corresponding to each second brightness value.
On the other hand, an embodiment of the present invention provides a compensation parameter obtaining apparatus for a display panel, including:
the brightness setting module is used for setting M sections of first brightness values and N-M sections of second brightness values in N sections of display brightness values, wherein the N sections of display brightness values respectively have corresponding section numbers, N is a positive integer larger than 2, and M is a positive integer larger than 1;
the compensation parameter acquisition module is used for respectively acquiring compensation parameters corresponding to the first brightness values according to the M sections of image data under the first brightness values;
the fitting curve generation module is respectively electrically connected with the brightness setting module and the compensation parameter acquisition module and is used for generating a fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the acquired compensation parameters;
and the compensation parameter calculation module is electrically connected with the brightness setting module and the fitting curve generation module respectively and used for calculating and obtaining the compensation parameters corresponding to the second brightness values according to the fitting curve and the segment numbers corresponding to the second brightness values.
One of the above technical solutions has the following beneficial effects:
in the embodiment of the invention, the nonlinear function relationship between the compensation parameters and the segment numbers can be constructed by utilizing the segment numbers corresponding to the M segments of the first brightness values and the fitting curve generated by fitting the compensation parameters, so that the dynamic compensation parameters corresponding to the display brightness values can be calculated according to the fitting curve. Compared with a linear interpolation algorithm in the prior art, the compensation parameters under different display brightness values calculated based on the fitting curve in the embodiment of the invention are more accurate, the compensation mode is more in line with the screen characteristic, and the display panel can be dynamically compensated more optimally.
In addition, on the premise of ensuring higher compensation precision, the embodiment of the invention can be directly calculated by only acquiring the compensation parameters corresponding to partial display brightness values (first brightness values) according to the image data and applying the fitting curve to the compensation parameters corresponding to the rest display brightness values (second brightness values), and when the value of N is larger, the acquisition time of the compensation parameters can be greatly saved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a compensation parameter obtaining method for a display panel according to an embodiment of the present invention;
fig. 2 is another flowchart of a compensation parameter obtaining method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a compensation parameter obtaining method according to another embodiment of the present invention;
fig. 4 is a flowchart of a compensation parameter obtaining method according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a compensation parameter obtaining apparatus of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for obtaining compensation parameters according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a compensation parameter obtaining apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a compensation parameter obtaining apparatus according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first and second may be used to describe the display luminance values in the embodiments of the present invention, the display luminance values should not be limited to these terms, which are used only to distinguish the display luminance values from each other. For example, the first luminance value may also be referred to as a second luminance value, and similarly, the second luminance value may also be referred to as a first luminance value without departing from the scope of the embodiments of the present invention.
An embodiment of the present invention provides a method for obtaining compensation parameters of a display panel, as shown in fig. 1, where fig. 1 is a flowchart of the method for obtaining compensation parameters of a display panel provided in the embodiment of the present invention, and the method for obtaining compensation parameters includes:
step S1: setting M sections of first brightness values and N-M sections of second brightness values in N sections of display brightness values, wherein the N sections of display brightness values respectively have corresponding section numbers, N is a positive integer larger than 2, and M is a positive integer larger than 1.
The N-segment display luminance values of the display panel are set according to actual display requirements of the display panel, and may be, for example, 0x07FF, 0x0580, 0x03ED, 0x029E, 0x019E, 0x00DF, and 0x000A, respectively.
Step S2: and respectively acquiring compensation parameters corresponding to the first brightness values according to the M sections of image data under the first brightness values.
Step S3: and generating a fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the obtained compensation parameters.
Step S4: and calculating to obtain the compensation parameters corresponding to the second brightness values according to the fitting curve and the segment numbers corresponding to the second brightness values.
In the embodiment of the invention, the nonlinear function relationship between the compensation parameters and the segment numbers can be constructed by utilizing the segment numbers corresponding to the M segments of the first brightness values and the fitting curve generated by fitting the compensation parameters, so that the dynamic compensation parameters corresponding to the display brightness values can be calculated according to the fitting curve. Compared with a linear interpolation algorithm in the prior art, the compensation parameters under different display brightness values calculated based on the fitting curve in the embodiment of the invention are more accurate, the compensation mode is more in line with the screen characteristic, and the display panel can be dynamically compensated more optimally.
In addition, on the premise of ensuring higher compensation precision, the embodiment of the invention can be directly calculated by only acquiring the compensation parameters corresponding to partial display brightness values (first brightness values) according to the image data and applying the fitting curve to the compensation parameters corresponding to the rest display brightness values (second brightness values), and when the value of N is larger, the acquisition time of the compensation parameters can be greatly saved.
In a possible implementation manner, as shown in fig. 2, fig. 2 is another flowchart of the compensation parameter obtaining method according to the embodiment of the present invention, and the step S1 of setting the M segments of the first luminance values in the N segments of the display luminance values includes:
step K1: and respectively acquiring compensation parameters corresponding to the display brightness values according to the image data of the first display panel to be compensated under the N sections of display brightness values.
Step K2: selecting part of display brightness values from N sections of display brightness values of a first display panel to be compensated as brightness values to be detected, generating a fitting curve to be detected according to a section number corresponding to the brightness values to be detected and the acquired compensation parameters, and calculating to obtain compensation parameters to be detected corresponding to the display brightness values which are not selected according to the fitting curve to be detected and the section numbers corresponding to the display brightness values which are not selected; and the difference value between the compensation parameter to be detected for displaying the brightness value and the compensation parameter obtained according to the image data is a parameter difference value.
Step K3: and selecting different display brightness values as brightness values to be detected for multiple times in the N sections of display brightness values, comparing the parameter difference values obtained for multiple times, and recording the section number corresponding to the brightness value to be detected, which can obtain the minimum parameter difference value, as the first section number.
Step K4: and when the compensation parameter of the second display panel to be compensated is obtained, setting the display brightness value corresponding to the first class number in the N segments of display brightness values as a first brightness value.
Before the display panels leave a factory, one or more display panels can be selected from the display panels in the same batch as a first display panel to be compensated, and the other display panels are second display panels to be compensated, wherein N sections of display brightness values set by the first display panel to be compensated and the second display panel to be compensated are the same, and section numbers corresponding to the N sections of display brightness values are also the same.
For the first display panel to be compensated, firstly, according to the image data of the first display panel to be compensated under each section of the display brightness values, the compensation parameters corresponding to each display brightness value are respectively obtained. It can be understood that the compensation parameters acquired in this way can be regarded as theoretical compensation parameters, and the compensation based on the theoretical compensation parameters is more accurate.
And then, randomly selecting different display brightness values from the N sections of display brightness values for multiple times to serve as brightness values to be detected, and further generating a fitting curve to be detected by using the section number corresponding to the brightness values to be detected and the previously obtained compensation parameters. It can be understood that the selected brightness values to be measured are different, the fitting curve to be measured generated by fitting is also different, and the calculated compensation parameters to be measured have certain difference after the fitting curve to be measured is substituted into the same segment number.
Therefore, after a fitting curve is generated by using the brightness value to be measured each time, the segment number of the display brightness value which is not selected can be substituted into the fitting curve to be measured, and then the difference between the compensation parameter to be measured calculated according to the fitting curve to be measured and the previously acquired compensation parameter is judged. And the fitting curve to be measured corresponding to the compensation parameter with the minimum difference can be regarded as the fitting curve with the optimal compensation effect. In this regard, the segment number of the luminance value to be measured that generates the fitting curve to be measured may be recorded as the first segment number.
And when the compensation parameters of other second display panels to be compensated are obtained, the display brightness value corresponding to the first class number in the N segments of display brightness values can be directly set as the first brightness value.
According to the embodiment of the invention, the first display panel to be compensated is used as the detection panel to obtain the segment number corresponding to the display brightness value capable of fitting the optimal fitting curve, and when the compensation parameters of other second display panels to be compensated are obtained, the display brightness value corresponding to the segment number in the N segments of display brightness values of the second display panels to be compensated is directly set as the first brightness value, so that the fitting curve fitted according to the part of the first brightness value is the fitting curve capable of being matched with the screen characteristics of the display panel, and the compensation parameters corresponding to the second display values calculated according to the fitting curve are more accurate.
Further, when the brightness value to be detected is selected from the N segments of display brightness values, the number of the selected brightness values to be detected is greater than or equal to 3. Therefore, the data volume of the compensation parameters and the segment numbers for generating the fitting curve to be tested is larger, the fitting effect is better, the first segment numbers of the brightness values to be tested corresponding to the optimal fitting curve can be more accurately selected, and the compensation parameters calculated based on the fitting curve can be closer to the theoretical values.
In a possible implementation manner, as shown in fig. 3, fig. 3 is a flowchart of a method for obtaining a compensation parameter according to an embodiment of the present invention, and step S2 may specifically include:
step S21: and under each first brightness value, acquiring image data of each sub-pixel under a preset gray scale according to the shot detection picture.
Step S22: and acquiring compensation parameters corresponding to the first brightness values according to the acquired image data.
Specifically, under each first luminance value, the second to-be-compensated display panel displays a detection picture under a preset gray scale, the detection picture can be photographed by a high-precision Charge Coupled Device (CCD) camera, image data corresponding to each pixel in the detection picture is extracted, and then a compensation parameter corresponding to each first luminance value is obtained according to the acquired image data, and further, a compensated gray scale value corresponding to each first luminance value under the preset gray scale can be obtained according to the compensation parameter, so as to realize compensation of the display panel.
Generally, the compensated gray-scale value of the display panel is related to two compensation parameters, Gain and Offset. For example, the compensated gray scale value Y corresponding to the preset gray scale m is Gain × m + offset. Accordingly, the compensation parameter may include a Gain and a reference Offset.
When the compensation parameter includes the Gain and the reference Offset, further, as shown in fig. 4, fig. 4 is another flowchart of the method for acquiring the compensation parameter according to the embodiment of the present invention, and step S3 may specifically include:
step S31: generating a first fitting curve according to the segment number and the Gain corresponding to the M segments of the first brightness values, wherein the first fitting curve is as follows:
wherein, C0And CiRespectively, the fitting coefficients corresponding to the Gain, and the band is the segment number.
As described above, the non-linear function relationship between the Gain and the segment number can be constructed by using the segment number corresponding to the M segments of the first luminance values and the first fitting curve generated by fitting the Gain, and the Gain corresponding to the second luminance value calculated based on the first fitting curve is more accurate, so that the display panel can be dynamically compensated more optimally.
Step S32: and generating a second fitting curve according to the segment number and the reference Offset corresponding to the M segments of the first brightness values, wherein the second fitting curve is as follows:
wherein, C0' and Ci' are fitting coefficients corresponding to the reference Offset amounts, respectively.
As described above, the second fitting curve generated by fitting the segment numbers corresponding to the M segments of the first luminance values and the reference Offset can construct a nonlinear functional relationship between the reference Offset and the segment numbers, and the reference Offset corresponding to the second luminance values calculated based on the second fitting curve is more accurate, so that the display panel can be dynamically compensated more optimally.
Further, in order to improve the orderliness of the display brightness values and the segment numbers corresponding to the display brightness values and further optimize the generated fitting curve, the N segments of display brightness values are sorted in an increasing mode of the brightness values, and the segment numbers corresponding to the sorted N segments of display brightness values are increased in size; or the N sections of display brightness values are sorted in a descending manner, and the section numbers corresponding to the sorted N sections of display brightness values are reduced in size.
Based on the same inventive concept, an embodiment of the present invention further provides a compensation parameter obtaining apparatus for a display panel, as shown in fig. 5, fig. 5 is a schematic structural diagram of the compensation parameter obtaining apparatus for a display panel provided in the embodiment of the present invention, and the compensation parameter obtaining apparatus includes a brightness setting module 1, a compensation parameter obtaining module 2, a fitting curve generating module 3, and a compensation parameter calculating module 4.
The brightness setting module 1 is configured to set M segments of first brightness values and N-M segments of second brightness values in N segments of display brightness values, where the N segments of display brightness values respectively have their corresponding segment numbers, N is a positive integer greater than 2, and M is a positive integer greater than 1.
The compensation parameter obtaining module 2 is configured to obtain, according to the M segments of image data under the first brightness value, a compensation parameter corresponding to each first brightness value.
The fitting curve generating module 3 is electrically connected with the brightness setting module 1 and the compensation parameter obtaining module 2, and is configured to generate a fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the obtained compensation parameters.
The compensation parameter calculation module 4 is electrically connected to the brightness setting module 1 and the fitting curve generation module 3, and is configured to calculate the compensation parameters corresponding to the second brightness values according to the fitting curve and the segment numbers corresponding to the second brightness values.
Compared with a linear interpolation algorithm in the prior art, the fitting curve generated by fitting in the embodiment of the invention can construct a nonlinear functional relationship between the compensation parameters and the segment numbers, and the compensation parameters corresponding to the display brightness values can be calculated more accurately according to the fitting curve. The compensation mode is more in line with the screen characteristic, so that the display panel can be subjected to more optimal dynamic compensation.
In addition, according to the embodiment of the invention, the compensation parameters corresponding to the display brightness values of the part (the first brightness value) can be directly calculated by only acquiring the compensation parameters corresponding to the display brightness values of the part (the second brightness value) according to the image data and applying the fitting curve to the compensation parameters corresponding to the display brightness values of the rest part, and when the value of N is larger, the acquisition time of the compensation parameters can be greatly saved.
In a possible implementation manner, as shown in fig. 6, fig. 6 is another schematic structural diagram of the compensation parameter obtaining apparatus according to the embodiment of the present invention, and the compensation parameter obtaining apparatus further includes a selecting module 5, where the selecting module 5 is electrically connected to the brightness setting module 1. The selecting module 5 is used for: respectively acquiring compensation parameters corresponding to the display brightness values of the first display panel to be compensated according to the image data of the first display panel to be compensated under the N sections of display brightness values; selecting part of display brightness values from N sections of display brightness values of a first display panel to be compensated as brightness values to be detected, generating a fitting curve to be detected according to a section number corresponding to the brightness values to be detected and the acquired compensation parameters, and calculating to obtain compensation parameters to be detected corresponding to the display brightness values which are not selected according to the fitting curve to be detected and the section numbers corresponding to the display brightness values which are not selected; wherein, the difference value between the compensation parameter to be measured for displaying the brightness value and the compensation parameter obtained according to the image data is a parameter difference value; and selecting different display brightness values as brightness values to be detected for multiple times in the N sections of display brightness values, comparing the parameter difference values obtained for multiple times, and recording the section number corresponding to the brightness value to be detected, which can obtain the minimum parameter difference value, as the first section number.
Based on this, the brightness setting module 1 is configured to set, according to the first segment number recorded by the selecting module 5, a display brightness value corresponding to the first segment number in the N segments of display brightness values of the second to-be-compensated display panel as the first brightness value.
According to the embodiment of the invention, the first display panel to be compensated is used as the detection panel to obtain the segment number corresponding to the display brightness value capable of fitting the optimal fitting curve, and when the compensation parameters of other second display panels to be compensated are obtained, the display brightness value corresponding to the segment number in the N segments of display brightness values of the second display panels to be compensated is directly set as the first brightness value, so that the fitting curve fitted according to the part of the first brightness value is the fitting curve capable of being matched with the screen characteristics of the display panel, and the compensation parameters corresponding to the second display values calculated according to the fitting curve are more accurate.
In a possible implementation manner, as shown in fig. 7, fig. 7 is a schematic structural diagram of a compensation parameter obtaining apparatus according to an embodiment of the present invention, and the compensation parameter obtaining module 2 includes an image data obtaining unit 6 and a parameter obtaining unit 7.
The image data acquiring unit 6 is configured to acquire image data of each sub-pixel at a preset gray level according to the captured detection picture at each first brightness value. The parameter obtaining unit 7 is electrically connected to the image data obtaining unit 6 and the fitting curve generating module 3, and is configured to obtain, according to the obtained image data, a compensation parameter corresponding to each first luminance value.
Specifically, under each first luminance value, the second to-be-compensated display panel displays a detection picture under a preset gray scale, the detection picture can be photographed by a high-precision Charge Coupled Device (CCD) camera, image data corresponding to each pixel in the detection picture is extracted, and then a compensation parameter corresponding to each first luminance value is obtained according to the acquired image data, and further, a compensated gray scale value corresponding to each first luminance value under the preset gray scale can be obtained according to the compensation parameter, so as to realize compensation for the display panel.
When the compensation parameter includes the Gain and the reference Offset, as shown in fig. 8, fig. 8 is a schematic view of another structure of the compensation parameter obtaining apparatus according to the embodiment of the present invention, and the compensation curve generating module includes a first curve generating unit 8 and a second curve generating unit 9.
The first curve generating unit 8 is electrically connected to the brightness setting module 1 and the compensation parameter calculating module 4, respectively, and is configured to generate the first curve according to the M segments of the first brightness valuesSegment number and Gain, generating a first fitting curve, wherein the first fitting curve is as follows:
wherein, C0And CiRespectively, the fitting coefficients corresponding to the Gain, and the band is the segment number.
The second curve generating unit 9 is electrically connected to the luminance setting module 1 and the compensation parameter calculating module 4, and configured to generate a second fitting curve according to the segment number and the reference Offset corresponding to the M segments of the first luminance values, where the second fitting curve is:
wherein, C0' and Ci' are fitting coefficients corresponding to the reference Offset amounts, respectively.
As described above, the first curve generating unit 8 can construct a nonlinear functional relationship between the Gain and the segment number by using the segment number corresponding to M segments of the first luminance values and the first fitting curve generated by fitting the Gain, and the second curve generating unit 9 can construct a nonlinear functional relationship between the reference Offset and the segment number by using the segment number corresponding to M segments of the first luminance values and the second fitting curve generated by fitting the reference Offset. The Gain and the reference Offset under different display brightness values calculated based on the first fitting curve and the second fitting curve are more accurate, and then more accurate compensated gray-scale values can be obtained.
In addition, it should be noted that, in the embodiment of the present invention, the compensation parameter acquiring device may be integrated in the display panel, for example, integrated in a driving chip of the display panel, or the compensation parameter acquiring device may also be an external device independent from the display panel.
For example, in a possible embodiment, the image data acquiring unit 6 in the compensation parameter acquiring module 2 may be integrated in a high-precision CCD camera, and the brightness setting module 1, the fitting curve generating module 3, the compensation parameter calculating module 4 and the parameter acquiring unit 7 may be integrated in a driving chip of the display panel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A method for obtaining compensation parameters of a display panel is characterized by comprising the following steps:
setting M sections of first brightness values and N-M sections of second brightness values in N sections of display brightness values, wherein the N sections of display brightness values respectively have corresponding section numbers, N is a positive integer larger than 2, and M is a positive integer larger than 1;
respectively acquiring compensation parameters corresponding to the first brightness values according to the M sections of image data under the first brightness values;
generating a fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the obtained compensation parameters;
and calculating to obtain a compensation parameter corresponding to each second brightness value according to the fitting curve and the segment number corresponding to each second brightness value.
2. The method according to claim 1, wherein the step of setting M segments of the first luminance values among N segments of the display luminance values comprises:
respectively acquiring compensation parameters corresponding to the display brightness values of a first display panel to be compensated according to the image data of the first display panel to be compensated under the N sections of display brightness values;
selecting part of the display brightness values from the N sections of display brightness values as brightness values to be detected, generating a fitting curve to be detected according to the section number corresponding to the brightness values to be detected and the acquired compensation parameters, and calculating to obtain compensation parameters to be detected corresponding to the display brightness values which are not selected according to the fitting curve to be detected and the section numbers corresponding to the display brightness values which are not selected; wherein, the difference value between the compensation parameter to be detected of the display brightness value and the compensation parameter obtained according to the image data is a parameter difference value;
selecting different display brightness values from the N sections of display brightness values for multiple times as the brightness values to be detected, comparing the parameter difference values obtained multiple times, and recording the section number corresponding to the brightness value to be detected, which can obtain the minimum parameter difference value, as a first section number;
and when the compensation parameter of the second display panel to be compensated is obtained, setting the display brightness value corresponding to the first class number in the N segments of display brightness values as the first brightness value.
3. The compensation parameter acquisition method for a display panel according to claim 2,
and when the brightness value to be detected is selected from the N sections of display brightness values, the number of the selected brightness values to be detected is more than or equal to 3.
4. The method according to claim 1, wherein the process of respectively obtaining the compensation parameters corresponding to the first luminance values according to the M segments of image data under the first luminance values comprises:
under each first brightness value, acquiring image data of each sub-pixel under a preset gray scale according to a shot detection picture;
and acquiring the compensation parameters corresponding to the first brightness values according to the acquired image data.
5. The compensation parameter acquisition method for a display panel according to claim 1,
the compensation parameters include a Gain and a reference Offset.
6. The method according to claim 5, wherein the generating a fitting curve according to the segment numbers corresponding to the M segments of the first luminance values and the acquired compensation parameters comprises:
generating a first fitting curve according to the segment number and the Gain corresponding to the M segments of the first brightness value, wherein the first fitting curve is as follows:
wherein, C0And CiRespectively corresponding fitting coefficients of the Gain, and band is the number of the segment;
generating a second fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the reference Offset, wherein the second fitting curve is as follows:
wherein, C0' and Ci' are fitting coefficients corresponding to the reference Offset amounts, respectively.
7. The compensation parameter acquisition method for a display panel according to claim 1,
the N sections of display brightness values are sorted in an increasing mode of brightness values, and the size of the section number corresponding to the sorted N sections of display brightness values is increased; or the N sections of display brightness values are sorted in a descending manner of brightness values, and the section numbers corresponding to the sorted N sections of display brightness values are descending.
8. A compensation parameter acquisition apparatus for a display panel, comprising:
the brightness setting module is used for setting M sections of first brightness values and N-M sections of second brightness values in N sections of display brightness values, wherein the N sections of display brightness values respectively have corresponding section numbers, N is a positive integer larger than 2, and M is a positive integer larger than 1;
the compensation parameter acquisition module is used for respectively acquiring compensation parameters corresponding to the first brightness values according to the M sections of image data under the first brightness values;
the fitting curve generation module is respectively electrically connected with the brightness setting module and the compensation parameter acquisition module and is used for generating a fitting curve according to the segment numbers corresponding to the M segments of the first brightness values and the acquired compensation parameters;
and the compensation parameter calculation module is electrically connected with the brightness setting module and the fitting curve generation module respectively and used for calculating and obtaining the compensation parameters corresponding to the second brightness values according to the fitting curve and the segment numbers corresponding to the second brightness values.
9. The apparatus of claim 8, further comprising a selecting module electrically connected to the brightness setting module for:
respectively acquiring compensation parameters corresponding to the display brightness values of a first display panel to be compensated according to the image data of the first display panel to be compensated under the N sections of display brightness values;
selecting part of the display brightness values from the N sections of the display brightness values of the first display panel to be compensated as to-be-detected brightness values, generating a to-be-detected fitting curve according to the section numbers corresponding to the to-be-detected brightness values and the acquired compensation parameters, and calculating to obtain to-be-detected compensation parameters corresponding to the unselected display brightness values according to the to-be-detected fitting curve and the section numbers corresponding to the unselected display brightness values; wherein, the difference value between the compensation parameter to be detected of the display brightness value and the compensation parameter obtained according to the image data is a parameter difference value;
selecting different display brightness values from N sections of display brightness values for multiple times as the brightness values to be detected, comparing the parameter difference values obtained multiple times, and recording the section number corresponding to the brightness value to be detected, which can obtain the minimum parameter difference value, as a first section number;
the brightness setting module is used for setting the display brightness value corresponding to the first segment number in N segments of display brightness values in a second display panel to be compensated as the first brightness value according to the first segment number recorded by the selecting module.
10. The apparatus of claim 8, wherein the compensation parameter acquiring module comprises:
the image data acquisition unit is used for acquiring image data of each sub-pixel under a preset gray scale according to the shot detection picture under each first brightness value;
and the parameter acquisition unit is respectively electrically connected with the image data acquisition unit and the fitting curve generation module and is used for acquiring the compensation parameters corresponding to the first brightness values according to the acquired image data.
11. The compensation parameter acquisition apparatus for a display panel according to claim 8,
the compensation parameters comprise Gain and reference Offset;
the compensation curve generation module comprises:
a first curve generating unit, electrically connected to the brightness setting module and the compensation parameter calculating module, respectively, and configured to generate a first fitting curve according to the segment number and the Gain corresponding to M segments of the first brightness value, where the first fitting curve is:
wherein, C0And CiRespectively the gainThe fit coefficient corresponding to Gain, and band is the segment number;
a second curve generating unit, electrically connected to the luminance setting module and the compensation parameter calculating module, respectively, and configured to generate a second fitting curve according to the segment number and the reference Offset corresponding to M segments of the first luminance value, where the second fitting curve is:
wherein, C0' and Ci' are fitting coefficients corresponding to the reference Offset amounts, respectively.
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