CN114743486A - Gamma adjusting method and device for display panel - Google Patents
Gamma adjusting method and device for display panel Download PDFInfo
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- CN114743486A CN114743486A CN202210447513.1A CN202210447513A CN114743486A CN 114743486 A CN114743486 A CN 114743486A CN 202210447513 A CN202210447513 A CN 202210447513A CN 114743486 A CN114743486 A CN 114743486A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The invention discloses a gamma adjusting method and device of a display panel. The gamma adjusting method of the display panel comprises the following steps: determining a first gamma adjustment binding point of the first brightness range according to the data scaling relation between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range; the gray scales corresponding to the same brightness in the first brightness range and the second brightness range are different, the first brightness range is 0-a, the second brightness range is 0-b, b is less than a, the first gamma adjustment binding point at least comprises s gray scales, and the absolute value of the difference value between the t gray scale corresponding to the second brightness range and the maximum gray scale n of the second brightness range of the s gray scales is smaller than or equal to a first set threshold; wherein a, b and t are real numbers larger than 0, and s and n are integers larger than 0; gamma adjusting the first brightness range according to the first gamma adjustment binding. The embodiment of the invention improves the display effect of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a gamma adjusting method and device of a display panel.
Background
With the development of display technology, people have higher and higher requirements on the display effect of the display panel, but the existing display panel still has the problem of poor display effect.
Disclosure of Invention
The invention provides a gamma adjusting method and a gamma adjusting device for a display panel, which are used for improving the display effect of the display panel.
According to an aspect of the present invention, there is provided a gamma adjusting method of a display panel, including:
determining a first gamma regulation binding point of the first brightness range according to the data scaling relation between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range; the gray scales corresponding to the same brightness in the first brightness range and the second brightness range are different, the first brightness range is 0-a, the second brightness range is 0-b, b is less than a, the first gamma adjustment binding point at least comprises s gray scale, and the absolute value of the difference value of the s gray scale between t gray scale corresponding to the same brightness in the second brightness range and the maximum gray scale n in the second brightness range is less than or equal to a first set threshold value; wherein a, b and t are real numbers larger than 0, and s and n are integers larger than 0;
gamma adjusting the first brightness range according to the first gamma adjustment binding.
Optionally, the first gamma adjustment binding point further includes a p gray scale;
the gray scale corresponding to the second brightness range comprises a q gray scale, and the absolute value of the difference value between the gray scale corresponding to the same brightness and the q gray scale corresponding to the p gray scale in the second brightness range is smaller than or equal to a second set threshold, wherein q is an integer larger than 0 and smaller than n, and p is an integer larger than 0 and smaller than s.
Optionally, the first set threshold is greater than or equal to 0 and less than or equal to 0.05, and the second set threshold is greater than or equal to 0 and less than or equal to 0.05.
Optionally, the first set threshold is equal to 0, and the second set threshold is equal to 0.
Optionally, p is an integer greater than or equal to 64 and less than s.
Optionally, before performing gamma adjustment on the first brightness range according to the first gamma adjustment binding point, the method further includes:
a second gamma adjustment tie point for the first brightness range is determined.
Optionally, the gamma adjusting the first brightness range according to the first gamma adjusting binding point includes:
adjusting the driving signal corresponding to the first gamma adjusting binding point to enable the brightness of the first gamma adjusting binding point to accord with a target gamma curve;
and performing linear interpolation on the driving signals corresponding to the adjacent first gamma adjusting binding points to determine the driving signals corresponding to the gray scales between the adjacent first gamma adjusting binding points.
According to another aspect of the present invention, there is provided a gamma adjusting apparatus of a display panel, including:
the gamma binding point determining module is used for determining a first gamma adjusting binding point of the first brightness range according to the data scaling relation between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range; the gray scales corresponding to the same brightness in the first brightness range and the second brightness range are different, the first brightness range is 0-a, the second brightness range is 0-b, b is less than a, the first gamma adjustment binding point at least comprises s gray scale, and the absolute value of the difference value of the s gray scale between t gray scale corresponding to the same brightness in the second brightness range and the maximum gray scale n in the second brightness range is less than or equal to a first set threshold value; wherein a, b and t are real numbers larger than 0, and s and n are integers larger than 0;
and the gamma adjusting module is used for carrying out gamma adjustment on the first brightness range according to the first gamma adjusting binding point.
Optionally, the first gamma adjustment binding point further includes a p gray scale;
the gray scale corresponding to the second brightness range comprises a q gray scale, and the absolute value of the difference value between the gray scale corresponding to the same brightness and the q gray scale corresponding to the p gray scale in the second brightness range is smaller than or equal to a second set threshold, wherein q is an integer larger than 0 and smaller than n, and p is an integer larger than 0 and smaller than s.
Optionally, the first set threshold is greater than or equal to 0 and less than or equal to 0.05, and the second set threshold is greater than or equal to 0 and less than or equal to 0.05.
The embodiment of the invention determines a first gamma adjustment binding point of a first brightness range according to a Data Scaling relation between a gray scale corresponding to the first brightness range and a gray scale corresponding to a second brightness range, and performs gamma adjustment on the first brightness range according to the first gamma adjustment binding point, wherein the first gamma adjustment binding point at least comprises an s gray scale, the absolute value of the difference value between the t gray scale corresponding to the second brightness range and the maximum gray scale n of the second brightness range is less than or equal to a first set threshold, and the s gray scale is the first gamma adjustment binding point, so that the brightness of the s gray scale accords with a target gamma curve, the brightness b corresponding to the n gray scale is close to or equal to the brightness corresponding to the s gray scale, the deviation between the brightness b corresponding to the n gray scale and the target gamma curve is smaller, or the brightness b corresponding to the target gamma curve is accorded with the target gamma curve, and the Data Scaling is started according to the brightness b, n gray scale, The target brightness of each gray scale calculated by the gamma formula and the target gamma index has small deviation with the actual brightness of each gray scale, so that the deviation between the brightness of each gray scale after the Data Scaling is started and the target gamma curve is reduced, and the display effect after the Data Scaling is started is improved.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 schematic view of a binding;
FIG. 2 is Gamma curve before and after Data Scaling is started;
FIG. 3 is a Gamma index curve before and after Data Scaling is turned on;
FIG. 4 is a flowchart illustrating a gamma adjustment method for a display panel according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a gamma index after Data Scaling is turned on according to the present embodiment;
FIG. 6 is a schematic diagram of a gamma adjustment apparatus for a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As the conventional display panel mentioned in the background art still has a problem of poor display effect, the inventors have found through research that the reason why such a problem occurs is that:
the display panel adopts the tie point to adjust when carrying out gamma regulation, and the tie point makes luminance and grey scale accord with target gamma curve through adjusting grey scale voltage, and wherein, the gamma index of target gamma curve is target gamma index. And assigning the gray scale voltage of the gray scale outside the binding point in a linear interpolation mode, wherein the brightness corresponding to the gray scale outside the binding point is higher than that of the target gamma curve. In addition, the conventional display panel usually has a Data Scaling function, and the Data corresponding to the large brightness range is scaled into the gray scale corresponding to the small brightness range through the Data Scaling function, for example, the large brightness range 0-600nit corresponds to the 0-255 gray scale, the small brightness range 0-500nit corresponds to the 0-255 gray scale, the brightness corresponding to each gray scale of 0-600nit is determined after the gamma adjustment is completed, after the Data Scaling is started, the 255 gray scale of the small brightness range directly corresponds to the c gray scale before the start, the brightness corresponding to the 0-255 gray scale after the start corresponds to the 0-c gray scale before the start respectively, and the brightness of each gray scale after the start is equal to the brightness corresponding to the corresponding gray scale before the start. In the scheme in the prior art, the gray scale c is usually a gray scale in the middle of adjacent binding points in a large brightness range, which causes that the brightness of the gray scale in the middle of the adjacent binding points is higher than that of a target gamma curve, so that the brightness of the 255 gray scale after Data Scaling is started is higher than that of the target gamma curve, and the target brightness of all other gray scales is calculated according to the brightness of the 255 gray scale, a target gamma index and a gamma formula after Data Scaling is started, so that the brightness of other gray scales is darker than the corresponding target brightness after Data Scaling is started, especially the deviation of the brightness of the high gray scale from the target brightness is large, and the display effect is influenced.
Fig. 1 is a schematic diagram of binding points, where, referring to fig. 1, a horizontal axis Gray represents Gray scale, a vertical axis L represents luminance, a solid line represents a target Gamma2.2 curve, a dotted line represents a Gamma curve obtained by interpolation, luminance at a binding point corresponds to the Gamma2.2 curve, and luminance at the middle between two binding points deviates from the Gamma2.2 curve to the maximum. Assuming that the tie point 1 is 255 gray levels and the tie point 2 is 239 gray levels, the intermediate gray level is 247 gray level, the deviation of 247 gray levels from the Gamma2.2 curve is the maximum, and the brightness of 247 gray levels conforms to the Gamma 2.156 curve. The specific calculation is as follows: assuming that the luminance L255 of the 255 gray level is 600nit, the luminance L239 of the 239 gray level is:
the ideal brightness of 247 gray levels on gamma2.2 is:
after the actual interpolation, the brightness of the resulting 247 gray scale is:
then Gamma index N247 of gray level 247 is:
N247＝LOG(L247/L255)/LOG(247/255)＝2.156。
if the N gray scale of the Data Scaling is 247 gray scale, because the brightness of the 247 gray scale is higher, and the brightness of the 255 gray scale after the Data Scaling is turned on is equal to the brightness of the 247 gray scale before the Data Scaling is turned on, the brightness of the 255 gray scale after the Data Scaling is turned on is higher than the brightness of the 255 gray scale after the Data Scaling is turned on, and the target brightness of all other gray scales after the Data Scaling is turned on is calculated according to the brightness of the 255 gray scale, the target Gamma index (2.2) and the Gamma formula, that is, the target brightness of the 255 gray scale and the target brightness of the other gray scales conform to the Gamma2.2 curve, so that the brightness of the Data Scaling after the Data Scaling is turned on is darker than the Gamma2.2 curve, and the Gamma2.4 curve is deviated from the high gray scale, and the specific Gamma curve refers to fig. 2 and fig. 3. Fig. 2 is a Gamma curve before and after Data Scaling is started, fig. 3 is a Gamma index curve before and after Data Scaling is started, and it can be seen from fig. 2 and fig. 3 that after Data Scaling is started, the high gray scale Gamma index curve is obviously worse, even deviates from Gamma 2.4.
Based on this, an embodiment of the present invention provides a gamma adjustment method for a display panel, and fig. 4 is a flowchart of the gamma adjustment method for a display panel, which can be executed by a gamma adjustment apparatus for a display panel, and the gamma adjustment apparatus for a display panel can be implemented in hardware and/or software. As shown in fig. 4, the method includes:
s110, determining a first gamma adjustment binding point of the first brightness range according to a data scaling relation between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range.
The first brightness range and the second brightness range have different gray scales corresponding to the same brightness, the first brightness range is 0-a, the second brightness range is 0-b, b is less than a, the first gamma adjustment binding point at least comprises s gray scales, and the absolute value of the difference value between t gray scale corresponding to the same brightness in the second brightness range and the maximum gray scale n in the second brightness range is smaller than or equal to a first set threshold; wherein a, b and t are real numbers greater than 0, and s and n are integers greater than 0.
Specifically, the first luminance range and the second luminance range are luminance ranges that can be displayed by the display panel, when the display panel adopts the first luminance range to display the picture, the highest display luminance is a, when the display panel adopts the second luminance range to display the picture, the highest display luminance is b, the values of a and b are not specifically limited in this embodiment, and an exemplary a may be 600nit, and b may be 560nit or 500nit, and the like. In addition, the first brightness range may correspond to 0-N gray scale, i.e., the first brightness range is divided into N +1 brightness levels, the second brightness range may correspond to 0-N gray scale, i.e., the second brightness range is divided into N +1 brightness levels, N and N may be the same or different, and for example, N and N may be 255.
The Data Scaling relationship between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range may be Ga ═ Gb × n/c, where Ga is the gray scale corresponding to the preset brightness in the second brightness range, i.e., the gray scale after Data Scaling is turned on, Gb is the gray scale corresponding to the preset brightness in the first brightness range, i.e., the gray scale before Data Scaling is turned on, and Ga is not equal to Gb, and the brightness of Ga corresponding to the second brightness range is the same as the brightness of Gb corresponding to the first brightness range. c is the gray scale of the first brightness range corresponding to the maximum gray scale n of the second brightness range, i.e. the gray scale of the Data Scaling of the first brightness range.
And the gray scale t corresponding to the s gray scale in the second brightness range is s n/c, t can be an integer or a non-integer, and the brightness of the t gray scale is the same as that of the s gray scale. By setting | n-t | less than or equal to a first set threshold, the brightness b corresponding to the n gray scale is close to or equal to the brightness b corresponding to t, i.e. the brightness b corresponding to the n gray scale is close to or equal to the brightness b corresponding to the s gray scale.
In addition, the size of the first set threshold may be set as required, so as to ensure that the brightness b corresponding to the n gray scale is close to or equal to the brightness b corresponding to the s gray scale.
And S120, carrying out gamma adjustment on the first brightness range according to the first gamma adjustment binding point.
Specifically, the gamma adjustment process may specifically include adjusting a driving signal, such as a driving voltage or a driving current, etc., of each first gamma adjustment binding point so that the brightness of each first gamma adjustment binding point conforms to the target gamma curve. Because the s gray scale is the first gamma adjustment binding point, the brightness of the s gray scale conforms to the target gamma curve, the brightness b corresponding to the n gray scale is close to or equal to the brightness corresponding to the s gray scale, so that the deviation between the brightness b corresponding to the n gray scale and the target gamma curve is smaller, or the brightness b corresponds to the target gamma curve, and the actual brightness of each gray scale after the Data Scaling is started is determined according to the Data Scaling relation Ga-Gb-n/c, i.e. the actual brightness of each gray scale is the same as the brightness of the gray scale corresponding to the first brightness range, the brightness is positioned on the target gamma curve (the first gamma adjustment binding point) or above the target gamma curve (the interpolation point), so that the deviation between the target brightness of each gray scale after the Data Scaling is started, which is calculated according to the brightness b of the n gray scale, the gamma formula and the target gamma index, and the actual brightness of each gray scale after the Data Scaling is started is smaller, and the display effect of the opened Data Scaling is improved.
The embodiment of the invention determines a first gamma adjustment binding point of a first brightness range according to a Data Scaling relation between a gray scale corresponding to the first brightness range and a gray scale corresponding to a second brightness range, and performs gamma adjustment on the first brightness range according to the first gamma adjustment binding point, wherein the first gamma adjustment binding point at least comprises an s gray scale, the absolute value of the difference value between the t gray scale corresponding to the second brightness range and the maximum gray scale n of the second brightness range is less than or equal to a first set threshold, and the s gray scale is the first gamma adjustment binding point, so that the brightness of the s gray scale accords with a target gamma curve, the brightness b corresponding to the n gray scale is close to or equal to the brightness corresponding to the s gray scale, the deviation between the brightness b corresponding to the n gray scale and the target gamma curve is smaller, or the brightness b corresponding to the target gamma curve is accorded with the target gamma curve, and the Data Scaling is started according to the brightness b, n gray scale, The target brightness of each gray scale calculated by the gamma formula and the target gamma index has small deviation with the actual brightness of each gray scale, so that the deviation between the brightness of each gray scale after the Data Scaling is started and the target gamma curve is reduced, and the display effect after the Data Scaling is started is improved.
Optionally, the first gamma adjustment binding point further includes a p gray scale;
the gray scale corresponding to the second brightness range comprises a q gray scale, and the absolute value of the difference value between the gray scale corresponding to the same brightness and the q gray scale corresponding to the p gray scale in the second brightness range is smaller than or equal to a second set threshold, wherein q is an integer larger than 0 and smaller than n, and p is an integer larger than 0 and smaller than s.
The gray scale corresponding to the same brightness of the p gray scale in the second brightness range is p × n/c, the brightness corresponding to the p × n/c is equal to the brightness corresponding to the p gray scale, and | p × n/c-q | is smaller than or equal to a second set threshold value, so that the brightness corresponding to the q gray scale is equal to or similar to the brightness corresponding to the p × n/c, that is, the brightness corresponding to the q gray scale is equal to or similar to the brightness corresponding to the p gray scale.
It should be noted that the second set threshold may be the same as or different from the first set threshold, and this embodiment is not limited specifically as long as it is ensured that the luminance corresponding to the q gray scale is close to or equal to the luminance corresponding to the p gray scale. In addition, the q gray scale can be any gray scale between 0 and n, and the p gray scale can be any gray scale larger than 0 and smaller than s.
Optionally, the first set threshold is greater than or equal to 0 and less than or equal to 0.05, and the second set threshold is greater than or equal to 0 and less than or equal to 0.05.
The first set threshold value is set to be greater than or equal to 0 and less than or equal to 0.05, so that the absolute value of the difference value between the t gray scale corresponding to the s gray scale in the second brightness range and the maximum gray scale n in the second brightness range is smaller, and the deviation between the brightness b corresponding to the n gray scale and the target gamma curve is smaller, so that the deviation between the target brightness of each gray scale calculated according to the brightness b of the n gray scale, the gamma formula and the target gamma index after the Data Scaling is started and the actual brightness of each gray scale is smaller, the deviation between the brightness of each gray scale after the Data Scaling is started and the target gamma curve is further reduced, and the display effect after the Data Scaling is started is improved.
And setting a second set threshold value to be greater than or equal to 0 and less than or equal to 0.05, so that the brightness difference corresponding to the q gray scale and the p gray scale is smaller, and the p gray scale is a first gamma regulation binding point, so that the brightness of the p gray scale accords with a target gamma curve, the deviation between the brightness corresponding to the q gray scale and the target gamma curve is smaller, the deviation between the q gray scale and the target brightness is smaller after Data Scaling is started, and the display effect is further improved.
In the following, the p-gray scale and the q-gray scale are described by taking c-247 as an example, and multiple sets of gray scales corresponding to the Data Scaling before and after the Data Scaling is turned on can be obtained according to the conversion relationship. Table 1 is a partial gray scale schematic table before and after Data scaling is turned on, referring to table 1, the same row in two columns 1 before and 1 after turning on corresponds to one gray scale group, the same row in two columns 2 before and 2 after turning on corresponds to one gray scale group, the same row in two columns 3 before and 3 after turning on corresponds to one gray scale group, the same row in two columns 4 before and 4 after turning on corresponds to one gray scale group, and the same row in two columns 5 before and 5 after turning on corresponds to one gray scale group. Referring to table 1, a point where the gray scale after Data Scaling is turned on is as close to an integer as possible is selected as the q gray scale, and the corresponding gray scale p before turning on is taken as a binding point. Such as 216,185,154,123,93 in table 1.
TABLE 1
Fig. 5 is a schematic diagram of gamma indexes after Data Scaling is started, and referring to fig. 5, after gamma binding is set according to the scheme of the embodiment of the present invention, the gamma indexes after Data Scaling are obviously better than those of the scheme in the prior art.
Optionally, the first set threshold is equal to 0, so that an absolute value of a difference between a t gray scale corresponding to the s gray scale in the second brightness range and a maximum gray scale n in the second brightness range is 0, that is, n is equal to t, that is, a gray scale corresponding to the n gray scale in the first brightness range is just a tie point s, and a brightness b corresponding to the n gray scale conforms to the target gamma curve, thereby further reducing a deviation between brightness of each gray scale after the Data Scaling is turned on and the target brightness, and improving a display effect after the Data Scaling is turned on.
Optionally, the second set threshold is equal to 0, so that a gray scale corresponding to the p gray scale in the second brightness range is a q gray scale, that is, the q gray scale just corresponds to the first gamma adjustment binding point (p gray scale), so that the brightness of the q gray scale after the Dtat Scaling is started is equal to the brightness of the p gray scale, the deviation between the brightness of the q gray scale and the target brightness is smaller, and the display effect after the Data Scaling is started is improved.
Optionally, before performing gamma adjustment on the first brightness range according to the first gamma adjustment binding point, the method further includes:
a second gamma adjustment tie point for the first brightness range is determined.
The second gamma adjustment tie point may be set empirically, or determined according to the sensitivity of the human eye, or set according to the requirement of the user, and this embodiment is not particularly limited. For example, the difference between the x-th second gamma adjustment binding point and the x + 1-th second gamma adjustment binding point may be set to 2uWherein u is an integer greater than or equal to 0.
In the actual gamma adjustment process, the second gamma adjustment tie point may be determined first, and then the first gamma adjustment tie point is added according to the data scaling relationship between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range, or a part of the first gamma adjustment tie point may be determined first according to the data scaling relationship between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range, and then the second gamma adjustment tie point is added, which is not specifically limited in this embodiment.
Optionally, p is an integer greater than or equal to 64 and less than s.
Specifically, since a plurality of second gamma adjustment binding points are generally arranged in the 0-64 gray scale range, the first gamma adjustment binding points do not need to be added in the low gray scale range. In addition, since the Data Scaling is turned on and then has a large deviation with the target gamma curve, which is a high gray level, in this embodiment, p is set to be greater than or equal to 64, that is, the first gamma adjustment tie point is increased by more than 64 gray levels for the first brightness range only according to the Data Scaling relationship between the gray level corresponding to the first brightness range and the gray level corresponding to the second brightness range, so that the display effect is ensured, and the operation amount is reduced. Illustratively, p may take an integer value greater than or equal to 64, less than or equal to 250.
Optionally, the gamma adjusting the first brightness range according to the first gamma adjusting binding point includes:
adjusting the driving signal corresponding to the first gamma adjusting binding point to enable the brightness of the first gamma adjusting binding point to accord with a target gamma curve;
and performing linear interpolation on the driving signals corresponding to the adjacent first gamma adjusting binding points to determine the driving signals corresponding to the gray scales between the adjacent first gamma adjusting binding points.
The driving signal may be a driving voltage or a driving current, and the target gamma curve may be a gamma2.2 curve or other gamma curves, which is not limited in this embodiment.
An embodiment of the present invention further provides a gamma adjusting device for a display panel, and fig. 6 is a schematic diagram of the gamma adjusting device for a display panel provided in the embodiment of the present invention, and referring to fig. 6, the gamma adjusting device includes:
a gamma binding point determining module 210, configured to determine a first gamma adjustment binding point of the first brightness range according to a data scaling relationship between a gray scale corresponding to the first brightness range and a gray scale corresponding to the second brightness range; the gray scales corresponding to the same brightness in the first brightness range and the second brightness range are different, the first brightness range is 0-a, the second brightness range is 0-b, b is less than a, the first gamma adjustment binding point at least comprises s gray scale, and the absolute value of the difference value of the s gray scale between t gray scale corresponding to the same brightness in the second brightness range and the maximum gray scale n in the second brightness range is less than or equal to a first set threshold value; wherein a, b and t are real numbers greater than 0, and s and n are integers greater than 0.
A gamma adjusting module 220, configured to perform gamma adjustment on the first brightness range according to the first gamma adjustment binding point.
Optionally, the first gamma adjustment tie point further includes a p gray level;
the gray scale corresponding to the second brightness range comprises a q gray scale, and the absolute value of the difference value between the gray scale corresponding to the same brightness in the second brightness range and the q gray scale is smaller than or equal to a second set threshold, wherein the q is an integer larger than 0, and the p is an integer larger than 0 and smaller than s.
Optionally, the first set threshold is greater than or equal to 0 and less than or equal to 0.05, and the second set threshold is greater than or equal to 0 and less than or equal to 0.05.
Optionally, the first set threshold is equal to 0, and the second set threshold is equal to 0.
Optionally, p is an integer greater than or equal to 64 and less than s.
Optionally, the gamma adjusting device further comprises:
a second gamma adjustment binding for determining the first brightness range prior to gamma adjusting the first brightness range according to the first gamma adjustment binding.
Optionally, the gamma adjusting module 220 includes:
and the binding point adjusting unit is used for adjusting the driving signal corresponding to the first gamma adjusting binding point, so that the brightness of the first gamma adjusting binding point accords with a target gamma curve.
And the inter-binding point gray scale adjusting unit is used for performing linear interpolation on the driving signals corresponding to the adjacent first gamma adjusting binding points to determine the driving signals corresponding to the gray scales between the adjacent first gamma adjusting binding points.
The gamma adjusting device of the display panel provided by the embodiment of the invention can execute the gamma adjusting method of the display panel provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the executing method.
It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for gamma adjustment of a display panel, comprising:
determining a first gamma regulation binding point of the first brightness range according to the data scaling relation between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range; the gray scales corresponding to the same brightness in the first brightness range and the second brightness range are different, the first brightness range is 0-a, the second brightness range is 0-b, b is less than a, the first gamma adjustment binding point at least comprises s gray scale, and the absolute value of the difference value of the s gray scale between t gray scale corresponding to the same brightness in the second brightness range and the maximum gray scale n in the second brightness range is less than or equal to a first set threshold value; wherein a, b and t are real numbers larger than 0, and s and n are integers larger than 0;
gamma adjusting the first brightness range according to the first gamma adjustment binding.
2. The method of claim 1, wherein:
the first gamma adjustment tie point further comprises a p gray level;
the gray scale corresponding to the second brightness range comprises a q gray scale, and the absolute value of the difference value between the gray scale corresponding to the same brightness and the q gray scale corresponding to the p gray scale in the second brightness range is smaller than or equal to a second set threshold, wherein q is an integer larger than 0 and smaller than n, and p is an integer larger than 0 and smaller than s.
3. The method of claim 2, wherein:
the first set threshold is greater than or equal to 0 and less than or equal to 0.05, and the second set threshold is greater than or equal to 0 and less than or equal to 0.05.
4. The method of claim 3, wherein:
the first set threshold is equal to 0 and the second set threshold is equal to 0.
5. The method of claim 2, wherein:
p is an integer greater than or equal to 64 and less than s.
6. The method of claim 1, further comprising, prior to gamma adjusting the first brightness range according to the first gamma adjustment binding:
a second gamma adjustment tie point for the first brightness range is determined.
7. The method of claim 2, wherein gamma adjusting the first brightness range according to the first gamma adjustment binding comprises:
adjusting the driving signal corresponding to the first gamma adjusting binding point to enable the brightness of the first gamma adjusting binding point to accord with a target gamma curve;
and performing linear interpolation on the driving signals corresponding to the adjacent first gamma adjusting binding points to determine the driving signals corresponding to the gray scales between the adjacent first gamma adjusting binding points.
8. A gamma adjustment apparatus for a display panel, comprising:
the gamma binding point determining module is used for determining a first gamma adjusting binding point of the first brightness range according to the data scaling relation between the gray scale corresponding to the first brightness range and the gray scale corresponding to the second brightness range; the gray scales corresponding to the same brightness in the first brightness range and the second brightness range are different, the first brightness range is 0-a, the second brightness range is 0-b, b is less than a, the first gamma adjustment binding point at least comprises s gray scale, and the absolute value of the difference value of the s gray scale between t gray scale corresponding to the same brightness in the second brightness range and the maximum gray scale n in the second brightness range is less than or equal to a first set threshold value; wherein a, b and t are real numbers larger than 0, and s and n are integers larger than 0;
and the gamma adjusting module is used for carrying out gamma adjustment on the first brightness range according to the first gamma adjusting binding point.
9. The apparatus of claim 8, wherein:
the first gamma adjustment binding also includes a p gray level;
the gray scale corresponding to the second brightness range comprises a q gray scale, and the absolute value of the difference value between the gray scale corresponding to the same brightness and the q gray scale corresponding to the p gray scale in the second brightness range is smaller than or equal to a second set threshold, wherein q is an integer larger than 0 and smaller than n, and p is an integer larger than 0 and smaller than s.
10. The apparatus of claim 9, wherein:
the first set threshold is greater than or equal to 0 and less than or equal to 0.05, and the second set threshold is greater than or equal to 0 and less than or equal to 0.05.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024065382A1 (en) * | 2022-09-29 | 2024-04-04 | 京东方科技集团股份有限公司 | Display brightness adjusting method and adjusting device, and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024065382A1 (en) * | 2022-09-29 | 2024-04-04 | 京东方科技集团股份有限公司 | Display brightness adjusting method and adjusting device, and display device |
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