CN112365862A - Display panel brightness adjusting method and device - Google Patents
Display panel brightness adjusting method and device Download PDFInfo
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- CN112365862A CN112365862A CN202011236803.9A CN202011236803A CN112365862A CN 112365862 A CN112365862 A CN 112365862A CN 202011236803 A CN202011236803 A CN 202011236803A CN 112365862 A CN112365862 A CN 112365862A
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The application provides a method and a device for adjusting the brightness of a display panel, wherein the method for adjusting the brightness of the display panel comprises the following steps: acquiring a first brightness value of a kth sub-pixel of a target panel on at least two scanning lines; determining a reference brightness value of a k-th sub-pixel of the target panel on a reference scanning line according to the first brightness value; acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line; and if the second brightness value is not equal to the reference brightness value, determining a target brightness value of the kth sub-pixel of the target panel on the target scanning line according to the difference value between the second brightness value and the reference brightness value. According to the method and the device, the target brightness value of the kth sub-pixel on the target scanning line is determined according to the brightness values of the kth sub-pixel on the plurality of scanning lines, so that the brightness of the sub-pixels connected with any one data line is the same, and the display uniformity of the product is improved.
Description
Technical Field
The present disclosure relates to the field of display, and in particular, to a method and an apparatus for adjusting brightness of a display panel.
Background
With the improvement of the product requirements of people on the display panel, in order to meet the market demand, the display device gradually develops towards a large size.
In the conventional display panel, in order to ensure the display uniformity of the product, the charging time of the corresponding sub-pixels is the same for different scanning lines. As the size of the display panel increases, the resistance and capacitance coupling effect of the data lines have a greater influence on the charging time of the sub-pixels in the following rows, so that the charging time of the sub-pixels in different rows may be different among the sub-pixels in the same column, which causes the display panel to display non-uniformly, thereby affecting the quality of the display panel.
Therefore, a method for adjusting the brightness of a display panel is needed to solve the above-mentioned problems.
Disclosure of Invention
The application provides a method and a device for adjusting the brightness of a display panel, which are used for solving the technical problem that the charging time of different rows of sub-pixels in the same column of sub-pixels of the existing display panel is different.
In order to solve the technical problem, the technical scheme provided by the application is as follows:
the application provides a display panel brightness adjusting method, which comprises the following steps:
acquiring a first brightness value of a kth sub-pixel of a target panel on at least two scanning lines;
determining a reference brightness value of a k-th sub-pixel of the target panel on a reference scanning line according to the first brightness value;
acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line;
and if the second brightness value is not equal to the reference brightness value, determining a target brightness value of a kth sub-pixel of the target panel on a target scanning line according to a difference value between the second brightness value and the reference brightness value, wherein k is a positive integer.
In the method for adjusting brightness of a display panel of the present application, the step of obtaining a first brightness value of a kth sub-pixel of a target panel on at least two scan lines includes:
acquiring a first brightness parameter of a kth sub-pixel of the target panel on an ith scanning line;
acquiring a second brightness parameter of a kth sub-pixel of the target panel on a jth scanning line;
the first and second luminance parameters include at least one of a gray scale value, a charging time, or a charging voltage, and i and j are positive integers.
In the brightness adjustment method for a display panel of the present application, the step of determining a reference brightness value of a kth sub-pixel of the target panel on a reference scan line according to the first brightness value includes:
acquiring a first mean value of the first brightness parameter and the second brightness parameter;
and determining a reference brightness value of the kth sub-pixel of the target panel on the reference scanning line according to the first average value.
In the brightness adjustment method for a display panel of the present application, the step of determining a reference brightness value of a kth sub-pixel of the target panel on a reference scan line according to the first brightness value includes:
acquiring a relation curve of the brightness parameter and the nth scanning line according to the first brightness parameter and the second brightness parameter;
determining a reference brightness value of a kth sub-pixel of the target panel on a reference scanning line according to the target scanning line of the target panel based on a relation curve of a brightness parameter and the nth scanning line;
wherein n is a positive integer.
In the method for adjusting brightness of a display panel of the present application, if the second brightness value is not equal to the reference brightness value, the step of determining a target brightness value of a kth sub-pixel of the target panel on a target scan line according to a difference between the second brightness value and the reference brightness value includes:
determining the reference charging time of the kth sub-pixel on the reference scanning line according to the reference brightness value;
determining the charging time to be adjusted of the kth sub-pixel on the target scanning line according to the second brightness value;
adjusting the charging time to be adjusted to enable the charging time to be adjusted to reach a target charging time of which the difference value with the reference charging time is smaller than a first threshold value;
and determining the target brightness value of the kth sub-pixel on the target scanning line according to the target charging time.
In the method for adjusting brightness of a display panel of the present application, the adjusting the charging time to be adjusted to make the charging time to be adjusted reach a target charging time whose difference with the reference charging time is smaller than a first threshold includes:
acquiring the ending time of the charging time to be adjusted;
determining a first starting time of the charging time to be adjusted according to the reference charging time and a first stopping time of the charging time to be adjusted;
and determining a target brightness value of the k-th sub-pixel of the target panel on the target scanning line according to the first starting time and the first ending time.
In the method for adjusting brightness of a display panel of the present application, the adjusting the charging time to be adjusted to make the charging time to be adjusted reach a target charging time whose difference with the reference charging time is smaller than a first threshold includes:
acquiring a first charging voltage of the charging time to be adjusted;
determining the association relation among the charging voltage, the charging time and the sub-pixel brightness according to the first charging voltage, the reference charging time and the reference brightness value;
and determining the target charging time and the target charging voltage based on the charging time to be adjusted according to the incidence relation among the charging voltage, the charging time and the sub-pixel brightness.
In the display panel brightness adjusting method of the present application, after the step of determining the target brightness value of the kth sub-pixel of the target panel on the target scan line, the method further includes:
acquiring a second initial time of initial charging of a kth sub-pixel on the target scanning line;
determining a third starting time of a falling edge of the data voltage of the kth sub-pixel on the target scanning line between the first starting time and the second starting time according to the first starting time and the second starting time;
wherein a difference between the first start time and the third start time is not greater than a difference between the second start time and the third start time.
The application also provides a display panel brightness adjusting device which comprises a first obtaining module, a reference brightness calculating module, a second obtaining module and a target brightness obtaining module;
the first acquisition module is used for acquiring a first brightness value of a kth sub-pixel of the target panel on at least two scanning lines;
the reference brightness calculation module is used for determining a reference brightness value of the kth sub-pixel of the target panel on a reference scanning line according to the first brightness value;
the second acquisition module is used for acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line;
the target brightness obtaining module is configured to determine a target brightness value of a kth sub-pixel of the target panel on a target scan line according to a difference between the second brightness value and the reference brightness value if the second brightness value is not equal to the reference brightness value, where k is a positive integer.
In the display panel brightness adjusting apparatus of the present application, the first obtaining module includes a first obtaining unit and a second obtaining unit;
the first acquisition unit is used for acquiring a first brightness parameter of a kth sub-pixel of the target panel on an ith scanning line;
the second obtaining unit is used for obtaining a second brightness parameter of a kth sub-pixel of the target panel on a jth scanning line;
wherein the first and second luminance parameters include at least one of a gray scale value, a charging time, or a charging voltage, and i and j are positive integers.
Has the advantages that: the application provides a method and a device for adjusting the brightness of a display panel, wherein the method for adjusting the brightness of the display panel comprises the following steps: acquiring a first brightness value of a kth sub-pixel of a target panel on at least two scanning lines; determining a reference brightness value of a k-th sub-pixel of the target panel on a reference scanning line according to the first brightness value; acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line; and if the second brightness value is not equal to the reference brightness value, determining a target brightness value of the kth sub-pixel of the target panel on the target scanning line according to the difference value between the second brightness value and the reference brightness value. According to the method and the device, the target brightness value of the kth sub-pixel on the target scanning line is determined according to the brightness values of the kth sub-pixel on the plurality of scanning lines, so that the brightness of the sub-pixels connected with any one data line is the same, and the display uniformity of the product is improved.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a step diagram of a method for adjusting brightness of a display panel according to the present application.
FIG. 2 is a timing diagram of data lines and scan lines of a display panel according to the prior art.
FIG. 3 is a first timing control diagram of data lines and scan lines of a display panel according to the present application.
FIG. 4 is a second timing control diagram of data lines and scan lines of a display panel according to the present application.
FIG. 5 is a third timing control diagram of data lines and scan lines of a display panel according to the present application.
Fig. 6 is a schematic structural diagram of a display panel brightness adjusting device according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the 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 application.
In the conventional display panel, in order to ensure the display uniformity of the product, the charging time of the corresponding sub-pixels is the same for different scanning lines. As the size of the display panel increases, the resistance and capacitance coupling effect of the data lines have a greater influence on the charging time of the sub-pixels in the following rows, so that the charging time of the sub-pixels in different rows may be different among the sub-pixels in the same column, which causes the display panel to display non-uniformly, thereby affecting the quality of the display panel. Based on this, the present application provides a method and an apparatus for adjusting brightness of a display panel to solve the above technical problem.
Referring to fig. 1, the present application provides a method for adjusting brightness of a display panel, which includes:
s10, acquiring a first brightness value of a kth sub-pixel of the target panel on at least two scanning lines;
in this embodiment, step S10 may include:
s101, acquiring a first brightness parameter of a kth sub-pixel of the target panel on an ith scanning line;
s102, acquiring a second brightness parameter of a kth sub-pixel of the target panel on a jth scanning line;
in this embodiment, the first and second luminance parameters include at least one of a gray-scale value, a charging time, or a charging voltage, and i and j are positive integers.
In this embodiment, as the size of the display panel increases, the influence of the resistance and the capacitance of the data line becomes more and more obvious, and different luminance values appear in the sub-pixels corresponding to the same row of data lines, so that the application determines the target luminance to be achieved by the pixels at the target position by obtaining the luminance parameters of the sub-pixels in different rows of the same data line as the reference values, and the related parameters capable of reflecting the luminance may be a gray scale value, a pixel charging time, a charging voltage, or the like, which is not particularly limited in this embodiment.
And S20, determining a reference brightness value of the kth sub-pixel of the target panel on the reference scanning line according to the first brightness value.
In this embodiment, step S20 may include:
s201, acquiring a first mean value of the first brightness parameter and the second brightness parameter;
s202, determining a reference brightness value of the kth sub-pixel of the target panel on a reference scanning line according to the first mean value.
In this embodiment, the reference luminance of the sub-pixel corresponding to any one data line is mainly obtained in this step, and is determined according to the luminance parameters of the sub-pixels in different rows on the data line. For example, when the first luminance parameter and the second luminance parameter are gray-scale values, that is, the corresponding reference gray-scale values are determined according to the average value of the first gray-scale values and the second gray-scale values corresponding to the sub-pixels in different rows, and when the luminance of the sub-pixels in other rows is adjusted, the gray-scale values of the sub-pixels are directly adjusted. Or, when the first luminance parameter and the second luminance parameter are charging times, that is, the corresponding reference charging time is determined according to the first charging time and the second charging time corresponding to the sub-pixels in different rows, and when the luminance of the sub-pixels in other rows is adjusted, the charging time of the sub-pixels is directly adjusted. Or, when the first luminance parameter and the second luminance parameter are charging voltages, that is, the corresponding reference charging voltages are determined according to the first charging voltage and the second charging voltage corresponding to the sub-pixels in different rows, and when the luminance of the sub-pixels in other rows is adjusted, the charging voltages of the sub-pixels are directly adjusted.
The embodiment mainly determines the corresponding reference value by the mean value of the different sub-pixels, and the number of the different sub-pixels is not limited to two in the present application, and may be multiple. Alternatively, when the luminance parameter of a sub-pixel is the standard parameter, it may use the luminance parameter of the sub-pixel as the reference parameter.
In this embodiment, step S20 may further include:
s211, obtaining a relation curve between the brightness parameter and the nth scanning line according to the first brightness parameter and the second brightness parameter.
S212, determining a reference brightness value of a k-th sub-pixel of the target panel on a reference scanning line according to the target scanning line of the target panel based on a relation curve between the brightness parameter and the nth scanning line, wherein n is a positive integer.
In the above step, a certain error may occur in determining the reference brightness by the average value of the first brightness parameter and the second brightness parameter, so that the relationship curve between the brightness parameter and the nth scan line is determined by the first brightness parameter and the second brightness parameter in this step. For example, in the same data line, the luminance of the sub-pixel corresponding to the fifth scan line is M1, the luminance of the sub-pixel corresponding to the 10 th scan line is M2, and the corresponding function f (x, y) is obtained according to a quadratic function, where x is the specific number of scan lines, and y is the corresponding luminance value. And the number of rows of the target scanning line is determined, that is, x is a known quantity, and only the corresponding y needs to be acquired.
In this embodiment, the function f (x, y) may be determined according to the parameters of the sub-pixels in order to ensure that the curve is fitted. Further, y may be a charging time or a charging voltage of the corresponding sub-pixel, and is not particularly limited herein.
On the basis of the above embodiment, it may further obtain the reference brightness value of the kth sub-pixel of the target panel on the reference scan line according to the history data. For example, a corresponding relationship curve is obtained according to the luminance values of different sub-pixels of the previous adjustment period, and the reference luminance value of the kth sub-pixel on the reference scan line is obtained according to the relationship curve in the current adjustment period.
And S30, acquiring a second brightness value of the kth sub-pixel of the target panel on the target scanning line.
In this step, it mainly obtains the brightness value of the sub-pixel at the target position in this adjustment period. For example, for the sub-pixels connected to the 5 th data line, the luminance values of the sub-pixels in the 5 th row and the 10 th row are known, and the luminance of the sub-pixels in the target position of the present application, which are all the rows except the sub-pixels in the 5 th row and the sub-pixels in the 10 th row, is the luminance to be adjusted. Finally, because the brightness corresponding to the current period is already displayed, the brightness adjustment can only be performed in the next adjustment period, and the current adjustment period only acquires the corresponding value to be adjusted.
S40, if the second brightness value is not equal to the reference brightness value, determining a target brightness value of the kth sub-pixel of the target panel on the target scanning line according to the difference between the second brightness value and the reference brightness value, where k is a positive integer.
In this step, since the luminance value of the kth sub-pixel on the target scan line needs to be adjusted to the reference luminance, the current adjustment period mainly obtains the amount to be adjusted of the kth sub-pixel on the target scan line, so that the luminances of the sub-pixels connected on the same data line are the same in the next measurement period.
In this embodiment, step S40 may include:
s401, determining the reference charging time of the kth sub-pixel on the reference scanning line according to the reference brightness value;
s402, determining the charging time to be adjusted of the kth sub-pixel on the target scanning line according to the second brightness value;
s403, adjusting the charging time to be adjusted to enable the charging time to be adjusted to reach a target charging time of which the difference value with the reference charging time is smaller than a first threshold value;
s404, determining the target brightness value of the kth sub-pixel on the target scanning line according to the target charging time.
In this step, the charging time of the data line in the same column is mainly adjusted by the difference of the charging time of different sub-pixels. For example, referring to fig. 2, for pixel a, when the Data line is at the first high level and the Gate line is at the second high level, pixel a will be in a charging state, where T1 is its charging time; for the pixel B, since the rising edge time of the Data line precedes the rising edge time of the Gate line, and the falling edge time of the Data line succeeds the falling edge time of the Gate line, the charging time T2 of the pixel B is much longer than that of the pixel a, resulting in the luminance value of the pixel B being larger than that of the pixel a.
In the embodiment, the charging time of the pixel B is further determined by determining the charging time of the pixel a, and the charging time of the pixel B is adjusted according to the precondition that the charging time of the pixel a is equal to that of the pixel B.
For a specific adjustment manner, in this embodiment, step S403 may include:
s40311, acquiring the ending time of the charging time to be adjusted;
s40312, determining a first starting time of the charging time to be adjusted according to the reference charging time and a first ending time of the charging time to be adjusted;
s40313, determining a target brightness value of the kth sub-pixel of the target panel on the target scan line according to the first start time and the first end time.
In this embodiment, step S40 further includes:
s405, acquiring a second initial time of initial charging of the kth sub-pixel on the target scanning line;
s406, determining a third starting time of a falling edge of the data voltage of the kth sub-pixel on the target scanning line between the first starting time and the second starting time according to the first starting time and the second starting time;
wherein a difference between the first start time and the third start time is not greater than a difference between the second start time and the third start time.
Referring to fig. 3, the present application determines the charging time of the pixel a, and further determines the charging start time of the pixel B according to the charging stop time of the pixel B and the charging time of the pixel a, so as to ensure that the charging time of the pixel a is the same as the charging time of the pixel B. For pixel a, the initial charging time is T1, the cut-off charging time is T2, and for pixel B, there are an initial charging start time T3, an initial charging cut-off time T4, an initial charging time T5, and a cut-off charging time T6, at 3 is a second start time, at 4 is a third start time, at 5 is a first start time, at 6 is a first cut-off time, and T5 to T6 are the charging time T2 of pixel B, so that T5 needs to be selected according to T1 in order to ensure that T2 is equal to T1.
Referring to fig. 4, fig. 4 is another timing diagram of brightness adjustment of the display panel of the present application, in which voltages of different rows are seamlessly connected, and after a row voltage of the present application is ended, the voltage is restored to the CFcom voltage or the 0 gray level (0, i.e., L1), and then the next row voltage is outputted, which is equivalent to separating two adjacent data voltages by the CFcom voltage or the 0 gray level voltage, so that two rising edges exist. Second, the voltages of the two rising edges are related to the gray scale and are not necessarily equal to each other. The adjustment in fig. 4 is the same as in fig. 3 and will not be described in detail in this application.
Referring to fig. 5, the timing of the rising edge of the Gate line may be adjusted to adjust the charging time of the pixel B, or both may be adjusted synchronously.
In this embodiment, step S403 may further include:
s40321, acquiring a first charging voltage of the charging time to be adjusted;
s40322, determining an association relationship between the charging voltage, the charging time, and the sub-pixel luminance according to the first charging voltage, the reference charging time, and the reference luminance value;
s40323, according to the association relation among the charging voltage, the charging time and the sub-pixel brightness, the target charging time and the target charging voltage are determined based on the charging time to be adjusted.
In this step, the luminance of the sub-pixel is related to the charging voltage in addition to the charging time. For example, after the brightness value required to be achieved is obtained, since the charging time and the charging voltage are in negative correlation, in order to avoid the charging time being too long or too short, the charging voltage can be adjusted, and the charging voltage can be decreased or increased.
The application provides a display panel brightness adjusting method, which comprises the steps of obtaining a first brightness value of a kth sub-pixel of a target panel on at least two scanning lines; determining a reference brightness value of a k-th sub-pixel of the target panel on a reference scanning line according to the first brightness value; acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line; and if the second brightness value is not equal to the reference brightness value, determining a target brightness value of the kth sub-pixel of the target panel on the target scanning line according to the difference value between the second brightness value and the reference brightness value. According to the method and the device, the target brightness value of the kth sub-pixel on the target scanning line is determined according to the brightness values of the kth sub-pixel on the plurality of scanning lines, so that the brightness of the sub-pixels connected with any one data line is the same, and the display uniformity of the product is improved.
Referring to fig. 6, the present application further provides a display panel brightness adjusting apparatus 100, which includes a first obtaining module 101, a reference brightness calculating module 102, a second obtaining module 103, and a target brightness obtaining module 104;
the first obtaining module 101 is configured to obtain a first luminance value of a kth sub-pixel of a target panel on at least two scan lines; the reference brightness calculation module 102 is configured to determine a reference brightness value of a kth sub-pixel of the target panel on a reference scan line according to the first brightness value; the second obtaining module 103 is configured to obtain a second brightness value of a kth sub-pixel of the target panel on a target scan line; the target brightness obtaining module 104 is configured to determine a target brightness value of a kth sub-pixel of the target panel on the target scan line according to a difference between the second brightness value and the reference brightness value if the second brightness value is not equal to the reference brightness value, where k is a positive integer.
In the display panel brightness adjusting apparatus of the present application, the first obtaining module 101 includes a first obtaining unit and a second obtaining unit; the first acquisition unit is used for acquiring a first brightness parameter of a kth sub-pixel of the target panel on an ith scanning line; the second obtaining unit is used for obtaining a second brightness parameter of a kth sub-pixel of the target panel on a jth scanning line; wherein the first and second luminance parameters include at least one of a gray scale value, a charging time, or a charging voltage, and i and j are positive integers.
In the display panel brightness adjusting apparatus of the present application, the reference brightness calculating module 102 is further configured to obtain a first average value of the first brightness parameter and the second brightness parameter; and determining a reference brightness value of the kth sub-pixel of the target panel on the reference scanning line according to the first average value.
In the display panel brightness adjusting apparatus of the present application, the reference brightness calculating module 102 is further configured to obtain a relation curve between a brightness parameter and an nth scanning line according to the first brightness parameter and the second brightness parameter; determining a reference brightness value of a kth sub-pixel of the target panel on a reference scanning line according to the target scanning line of the target panel based on a relation curve of a brightness parameter and the nth scanning line; wherein n is a positive integer.
In the display panel brightness adjusting apparatus of the present application, the target brightness obtaining module 104 is further configured to determine, according to the reference brightness value, a reference charging time of a kth sub-pixel on the reference scan line; determining the charging time to be adjusted of the kth sub-pixel on the target scanning line according to the second brightness value; adjusting the charging time to be adjusted to enable the charging time to be adjusted to reach a target charging time of which the difference value with the reference charging time is smaller than a first threshold value; and determining the target brightness value of the kth sub-pixel on the target scanning line according to the target charging time.
In the display panel brightness adjusting apparatus of the present application, the target brightness obtaining module 104 is further configured to obtain a cut-off time of the charging time to be adjusted; determining a first starting time of the charging time to be adjusted according to the reference charging time and a first stopping time of the charging time to be adjusted; and determining a target brightness value of the k-th sub-pixel of the target panel on the target scanning line according to the first starting time and the first ending time.
In the display panel brightness adjusting apparatus of the present application, the target brightness obtaining module 104 is further configured to obtain a first charging voltage of the charging time to be adjusted; determining the association relation among the charging voltage, the charging time and the sub-pixel brightness according to the first charging voltage, the reference charging time and the reference brightness value; and determining the target charging time and the target charging voltage based on the charging time to be adjusted according to the incidence relation among the charging voltage, the charging time and the sub-pixel brightness.
In the display panel brightness adjusting apparatus of the present application, the target brightness obtaining module 104 is further configured to obtain a second starting time of initial charging of a kth sub-pixel on the target scanning line; determining a third starting time of a falling edge of the data voltage of the kth sub-pixel on the target scanning line between the first starting time and the second starting time according to the first starting time and the second starting time; wherein a difference between the first start time and the third start time is not greater than a difference between the second start time and the third start time.
The application provides a method and a device for adjusting the brightness of a display panel, wherein the method for adjusting the brightness of the display panel comprises the following steps: acquiring a first brightness value of a kth sub-pixel of a target panel on at least two scanning lines; determining a reference brightness value of a k-th sub-pixel of the target panel on a reference scanning line according to the first brightness value; acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line; and if the second brightness value is not equal to the reference brightness value, determining a target brightness value of the kth sub-pixel of the target panel on the target scanning line according to the difference value between the second brightness value and the reference brightness value. According to the method and the device, the target brightness value of the kth sub-pixel on the target scanning line is determined according to the brightness values of the kth sub-pixel on the plurality of scanning lines, so that the brightness of the sub-pixels connected with any one data line is the same, and the display uniformity of the product is improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The foregoing describes in detail a method for adjusting brightness of a display panel and a brightness adjusting device thereof provided in an embodiment of the present application, and a specific example is applied in the present application to explain the principle and the implementation of the present application, and the description of the foregoing embodiment is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A method for adjusting the brightness of a display panel is characterized by comprising the following steps:
acquiring a first brightness value of a kth sub-pixel of a target panel on at least two scanning lines;
determining a reference brightness value of a k-th sub-pixel of the target panel on a reference scanning line according to the first brightness value;
acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line;
and if the second brightness value is not equal to the reference brightness value, determining a target brightness value of a kth sub-pixel of the target panel on a target scanning line according to a difference value between the second brightness value and the reference brightness value, wherein k is a positive integer.
2. The method according to claim 1, wherein the step of obtaining the first luminance value of the kth sub-pixel of the target panel on at least two scan lines comprises:
acquiring a first brightness parameter of a kth sub-pixel of the target panel on an ith scanning line;
acquiring a second brightness parameter of a kth sub-pixel of the target panel on a jth scanning line;
the first and second luminance parameters include at least one of a gray scale value, a charging time, or a charging voltage, and i and j are positive integers.
3. The method according to claim 2, wherein the step of determining the reference luminance value of the kth sub-pixel of the target panel on the reference scan line according to the first luminance value comprises:
acquiring a first mean value of the first brightness parameter and the second brightness parameter;
and determining a reference brightness value of the kth sub-pixel of the target panel on the reference scanning line according to the first average value.
4. The method according to claim 2, wherein the step of determining the reference luminance value of the kth sub-pixel of the target panel on the reference scan line according to the first luminance value comprises:
acquiring a relation curve of the brightness parameter and the nth scanning line according to the first brightness parameter and the second brightness parameter;
determining a reference brightness value of a kth sub-pixel of the target panel on a reference scanning line according to the target scanning line of the target panel based on a relation curve of a brightness parameter and the nth scanning line;
wherein n is a positive integer.
5. The method as claimed in claim 3 or 4, wherein the step of determining the target brightness value of the kth sub-pixel of the target panel on the target scan line according to the difference between the second brightness value and the reference brightness value if the second brightness value is not equal to the reference brightness value comprises:
determining the reference charging time of the kth sub-pixel on the reference scanning line according to the reference brightness value;
determining the charging time to be adjusted of the kth sub-pixel on the target scanning line according to the second brightness value;
adjusting the charging time to be adjusted to enable the charging time to be adjusted to reach a target charging time of which the difference value with the reference charging time is smaller than a first threshold value;
and determining the target brightness value of the kth sub-pixel on the target scanning line according to the target charging time.
6. The method according to claim 5, wherein the adjusting the charging time to be adjusted to reach a target charging time with a difference value smaller than a first threshold value from the reference charging time comprises:
acquiring the ending time of the charging time to be adjusted;
determining a first starting time of the charging time to be adjusted according to the reference charging time and a first stopping time of the charging time to be adjusted;
and determining a target brightness value of the k-th sub-pixel of the target panel on the target scanning line according to the first starting time and the first ending time.
7. The method according to claim 5, wherein the adjusting the charging time to be adjusted to reach a target charging time with a difference value smaller than a first threshold value from the reference charging time comprises:
acquiring a first charging voltage of the charging time to be adjusted;
determining the association relation among the charging voltage, the charging time and the sub-pixel brightness according to the first charging voltage, the reference charging time and the reference brightness value;
and determining the target charging time and the target charging voltage based on the charging time to be adjusted according to the incidence relation among the charging voltage, the charging time and the sub-pixel brightness.
8. The method of claim 6, further comprising, after the step of determining the target brightness value of the kth sub-pixel of the target panel on the target scan line:
acquiring a second initial time of initial charging of a kth sub-pixel on the target scanning line;
determining a third starting time of a falling edge of the data voltage of the kth sub-pixel on the target scanning line between the first starting time and the second starting time according to the first starting time and the second starting time;
wherein a difference between the first start time and the third start time is not greater than a difference between the second start time and the third start time.
9. A display panel brightness adjusting device is characterized by comprising a first obtaining module, a reference brightness calculating module, a second obtaining module and a target brightness obtaining module;
the first acquisition module is used for acquiring a first brightness value of a kth sub-pixel of the target panel on at least two scanning lines;
the reference brightness calculation module is used for determining a reference brightness value of the kth sub-pixel of the target panel on a reference scanning line according to the first brightness value;
the second acquisition module is used for acquiring a second brightness value of a kth sub-pixel of the target panel on a target scanning line;
the target brightness obtaining module is configured to determine a target brightness value of a kth sub-pixel of the target panel on a target scan line according to a difference between the second brightness value and the reference brightness value if the second brightness value is not equal to the reference brightness value, where k is a positive integer.
10. The display panel luminance adjustment device according to claim 9, wherein the first acquisition module includes a first acquisition unit and a second acquisition unit;
the first acquisition unit is used for acquiring a first brightness parameter of a kth sub-pixel of the target panel on an ith scanning line;
the second obtaining unit is used for obtaining a second brightness parameter of a kth sub-pixel of the target panel on a jth scanning line;
wherein the first and second luminance parameters include at least one of a gray scale value, a charging time, or a charging voltage, and i and j are positive integers.
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| CN202011236803.9A CN112365862B (en) | 2020-11-09 | 2020-11-09 | Display panel brightness adjusting method and device |
| PCT/CN2020/132695 WO2022095176A1 (en) | 2020-11-09 | 2020-11-30 | Brightness adjusting method and apparatus for display panel |
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| WO2022095176A1 (en) | 2022-05-12 |
| CN112365862B (en) | 2021-12-03 |
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