CN114613329A - Data processing method and device, and brightness compensation method and device - Google Patents
Data processing method and device, and brightness compensation method and device Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The application relates to a data processing method and device and a brightness compensation method and device. The method comprises the following steps: acquiring compensation values of pixels in at least one first compensation unit, wherein the first compensation unit comprises a plurality of pixels adjacent to each other in the same display panel; determining the type of the first compensation unit according to the compensation value, wherein the type of the first compensation unit comprises a discrete type and an aggregation type, and the discrete degree of the compensation value of each pixel in the discrete type first compensation unit is greater than the discrete degree of the compensation value of each pixel in the aggregation type first compensation unit; the pixels in each discrete first compensation unit are divided into a plurality of second compensation units so as to store the compensation data of each second compensation unit into a memory. The method can improve the demura effect.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a data processing method and apparatus, and a brightness compensation method and apparatus.
Background
The brightness of the OLEDs (Organic Light Emitting diodes) at different positions in the display panel is not uniform, and mura recognizable to human eyes occurs. And generating and storing compensation data of each pixel according to the brightness distribution of the display panel so as to call the compensation data for display, improve the brightness uniformity of the display panel and realize demura.
If the compensation data of each pixel is stored, the storage capacity required for the compensation data of the entire display panel may reach several tens of mega or even hundreds of mega. To reduce the required storage capacity, the compensation data may be compressed before being stored. However, the current data compression method sometimes results in poor demura effect.
Disclosure of Invention
In view of the above, it is necessary to provide a data processing method and apparatus, and a luminance compensation method and apparatus capable of improving the demura effect in view of the above technical problems.
In a first aspect, the present application provides a data processing method. The method comprises the following steps:
acquiring compensation values of pixels in at least one first compensation unit, wherein the first compensation unit comprises a plurality of pixels adjacent to each other in the same display panel;
determining the type of the first compensation unit according to the compensation value, wherein the type of the first compensation unit comprises a discrete type and an aggregation type, and the discrete degree of the compensation value of each pixel in the discrete type first compensation unit is greater than the discrete degree of the compensation value of each pixel in the aggregation type first compensation unit;
the pixels in each discrete first compensation unit are divided into a plurality of second compensation units so as to store the compensation data of each second compensation unit into a memory.
In the data processing method, pixels in one display panel are divided into a plurality of first compensation units, compensation values of all pixels in at least one first compensation unit are obtained, the first compensation units comprise a plurality of pixels which are adjacent to each other in the same display panel, the type of the first compensation unit is determined to be a discrete type or an aggregation type according to the compensation values, the discrete degree of the compensation values of all pixels in the discrete type first compensation units is larger than the discrete degree of the compensation values of all pixels in the aggregation type first compensation units, and then the pixels in each discrete type first compensation unit are divided into a plurality of second compensation units, so that compensation data of each second compensation unit are stored in a memory. Compared with the discrete first compensation unit, the second compensation unit reduces the number of pixels in a single compensation unit, reduces the discrete degree of the compensation value of each pixel in the compensation unit, reduces the difference between the compressed compensation data of the compensation unit and the original compensation data of each pixel, reduces the loss of the brightness compensation effect, can realize data compression and simultaneously keep the voltage drop compensation effect as much as possible, thereby improving the demura effect and improving the brightness uniformity of the whole display panel.
In one embodiment, the determining the type of the first compensation unit according to the compensation value includes:
determining the dispersion degree of the compensation value of each pixel in the first compensation unit according to the compensation value of each pixel in the same first compensation unit;
sequencing the first compensation units of the same display panel according to the sequence of the discrete degrees from large to small;
selecting at least one first compensation unit from the first according to the sorted serial numbers as a discrete first compensation unit;
or, the determining the type of the first compensation unit according to the compensation value includes:
determining the dispersion degree of the compensation value of each pixel in the first compensation unit according to the compensation value of each pixel in the same first compensation unit;
and if the discrete degree of the compensation value of each pixel in the first compensation unit is greater than or equal to a set threshold value, determining that the first compensation unit is a discrete first compensation unit.
The discrete type compensation method comprises the steps of determining the discrete degree of compensation values of pixels in the first compensation unit according to the compensation values of the pixels in the same first compensation unit, sequencing the first compensation units of the same display panel according to the sequence of the discrete degrees from large to small, and selecting at least one first compensation unit from the first to be used as a discrete type first compensation unit according to the sequenced serial number, so that the discrete type first compensation unit is selected from the first compensation units of the display panel. And the number of the discrete first compensation units is set, so that the storage space is convenient to arrange.
In one embodiment, the degree of dispersion of the compensation values of the pixels in the first compensation unit is as follows: one of a quartering difference, a variance, and a standard deviation of compensation values of the respective pixels in the first compensation unit.
The degree of dispersion of the compensation values of the respective pixels in the first compensation unit is determined by one of a quartile difference, a variance, and a standard deviation of the compensation values of the respective pixels in the first compensation unit.
In one embodiment, the method further comprises:
the pixels in the first compensation units of a plurality of aggregation types are divided into at least one third compensation unit so as to store the compensation data of each third compensation unit into a memory.
Pixels in the plurality of first compensation units of the aggregation type are divided into at least one third compensation unit to store compensation data of each third compensation unit into a memory. Compared with the first compensation unit which is divided into the aggregation type, the third compensation unit increases the number of pixels in a single compensation unit, so that the compression rate of data can be increased, the storage space can be saved, and the implementation cost can be reduced. And the discrete degree of the compensation value of each pixel in the aggregation type first compensation unit is low, the difference between the compensation values of each pixel is small, the influence of the change of the pixel number in the compensation unit on the compensation data can be ignored, the demora effect can not be deteriorated, and the integral brightness uniformity of the display panel is better.
In one embodiment, the method further comprises:
determining compensation data corresponding to a compensation unit according to the compensation value of each pixel, wherein the compensation unit at least comprises a second compensation unit;
preferably, the compensation data of the compensation unit is an average value of compensation values of the pixels in the compensation unit.
According to the compensation value of each pixel, the compensation data corresponding to the compensation unit is determined, so that the compensation values of a plurality of pixels can be reduced into the compensation data of one compensation unit, and data compression is realized, thereby saving the storage space and reducing the realization cost.
In one embodiment, the method further comprises:
and storing the compensation data of each compensation unit of the same display panel and the position information in the display panel into a memory.
The compensation data of each compensation unit of the same display panel and the position information in the display panel are stored in a memory so as to be called from the memory when used in the following period.
In one embodiment, the method further comprises:
and determining the compensation value of each pixel in each compensation unit according to the compensation data of each compensation unit of the display panel and the position information in the display panel, so as to be convenient for performing brightness compensation on the pixels according to the compensation value of each pixel.
In a second aspect, the present application further provides a brightness compensation method. The method comprises the following steps:
according to the method as provided in the first aspect, a compensation value of each pixel in each compensation unit is determined;
and performing brightness compensation on the pixels according to the compensation value of each pixel.
In a third aspect, the present application further provides a data processing apparatus. The device comprises:
a compensation value obtaining module, configured to obtain a compensation value of each pixel in at least one first compensation unit, where the first compensation unit includes a plurality of pixels adjacent to each other in the same display panel;
the type determining module is used for determining the type of the first compensation unit according to the compensation value, the type of the first compensation unit comprises a discrete type and an aggregation type, and the discrete degree of the compensation value of each pixel in the discrete type first compensation unit is greater than the discrete degree of the compensation value of each pixel in the aggregation type first compensation unit;
the dividing module is used for dividing the pixels in each discrete first compensation unit into a plurality of second compensation units so as to store the compensation data of each second compensation unit into a memory.
In a fourth aspect, the present application further provides a brightness compensation apparatus. The device comprises:
a determining module, configured to determine a compensation value of each pixel in each compensation unit according to the method provided in the first aspect;
and the compensation module is used for performing brightness compensation on the pixels according to the compensation value of each pixel.
Drawings
FIG. 1 is a diagram of an application environment of a data processing method in one embodiment;
FIG. 2 is a flow diagram illustrating a data processing method according to one embodiment;
FIG. 3 is a flowchart illustrating step S204 according to an embodiment;
FIG. 4 is a flow chart illustrating a data processing method according to another embodiment;
FIG. 5 is a flow chart illustrating a data processing method according to still another embodiment;
FIG. 6 is a diagram illustrating a distribution of compensation values for a portion of pixels in a display panel according to an embodiment;
FIG. 7 is a diagram illustrating the distribution of compensation data of a part of compensation units in the prior art;
FIG. 8 is a diagram illustrating the distribution of pixel compensation values of a portion of the second compensation units in the embodiment shown in FIG. 4;
FIG. 9 is a diagram illustrating the distribution of compensation data of a part of the compensation units in the embodiment shown in FIG. 4;
FIG. 10 is a diagram illustrating the distribution of pixel compensation values of a portion of the second compensation units in the embodiment shown in FIG. 5;
FIG. 11 is a diagram illustrating the distribution of compensation data of a part of the compensation units in the embodiment shown in FIG. 5;
FIG. 12 is a flow chart illustrating a method of brightness compensation according to one embodiment;
FIG. 13 is a block diagram showing the structure of a data processing apparatus according to an embodiment;
FIG. 14 is a block diagram showing the structure of a luminance compensation device according to an embodiment;
fig. 15 is an internal structural view of a display driver chip in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The data processing method provided by the embodiment of the application can be applied to the application environment shown in fig. 1. The display module includes a display panel 102 and a driving chip 104, the display panel 102 includes a plurality of pixels 103 distributed in an array, and the plurality of pixels 103 are located on the same side of the driving chip 104 and connected to the driving chip 104 through different metal wires 105. The driving chip 104 supplies a driving voltage to the pixel 103 through the metal wire 105. In the metal trace 105 connected between the pixel 103 and the driving chip 104 at different positions, the IR Drop (current resistance Drop) caused by the self-resistance of the metal trace 105 is different. If the driving chip 104 supplies the driving voltages with the same magnitude to the respective pixels 103, the magnitudes of the driving voltages applied to the respective pixels 103 are different, resulting in different magnitudes of the luminances of the respective pixels 103, and mura recognizable to human eyes occurs.
In order to realize demura and improve the brightness uniformity of the display panel 102, an image of a display picture of the display panel 102 may be obtained by a shooting device, and feature extraction may be performed on the image to obtain brightness data of each pixel 103. And then, based on the brightness data of each pixel 103, calculating by adopting a set demura algorithm to obtain compensation data of each pixel 103. The driving chip 104 stores the compensation data of each pixel 103 in the memory, and when controlling each pixel 103 to display, calls the compensation data of each pixel 103 from the memory, and adjusts the display luminance of the pixel 103 based on the compensation data of each pixel 103, so that the luminance of each pixel 103 is the same, thereby improving the luminance uniformity of the whole display panel 102 and realizing demura.
In order to ensure the storage space and the cost, before the driver chip 104 stores the compensation data of each pixel 103 into the memory, the compensation data of each pixel 103 may be compressed first, and then the compressed data is stored, and the storage space of the compensation data is reduced by adopting a down-sampling mode, thereby reducing the hardware cost of implementation.
In the related art, block compression may be used for the compensation data. Specifically, each pixel in the display panel is divided into a plurality of compensation units arranged in an array, each compensation unit includes a plurality of pixels, for example, each compensation unit includes 1 × 2 pixels, 2 × 4 pixels, 4 × 4 pixels, and the like. Wherein the front number represents the number of rows of pixels and the rear number represents the number of columns of pixels; alternatively, the front number represents the number of columns of pixels and the rear number represents the number of rows of pixels. Then, based on the original compensation data of each pixel in the same compensation unit, the compressed compensation data of the compensation unit is obtained, for example, the average value of the original compensation data of each pixel in the compensation unit is used as the compressed compensation data of the compensation unit. Such that the raw compensation data for a plurality of pixels in a compensation unit is reduced to the compressed compensation data for a compensation unit. Taking a compensation unit comprising 4 × 4 pixels as an example, the original compensation data of sixteen pixels in the compensation unit is reduced into a compressed compensation data, and the compensation data is compressed.
However, when the original compensation data of each pixel in a compensation unit has a large difference, the average value of the original compensation data of each pixel in the compensation unit (i.e. the compressed compensation data of the compensation unit) and the original compensation data of at least some pixels in the compensation unit have a large difference. Because the display brightness of each pixel in one compensation unit is adjusted based on the compressed compensation data of the compensation unit, the display brightness of at least part of the pixels in the compensation unit after being adjusted at present has a larger difference with the display brightness adjusted based on the original compensation data, the voltage drop compensation effect is lost, the demura effect is not good, and the overall brightness uniformity of the display panel cannot be effectively improved.
In order to solve the above problem, an embodiment of the present application provides a data processing method and apparatus, where pixels in a display panel are first divided into a plurality of first compensation units, and compensation values of the pixels in at least one first compensation unit are obtained, where the first compensation unit includes a plurality of pixels adjacent to each other in the same display panel, and then, according to the compensation values, it is determined whether the type of the first compensation unit is a discrete type or an aggregate type, and a dispersion degree of the compensation values of the pixels in the discrete first compensation unit is greater than a dispersion degree of the compensation values of the pixels in the aggregate type first compensation unit, and then, the pixels in each discrete first compensation unit are divided into a plurality of second compensation units, so as to store compensation data of each second compensation unit in a memory. Compared with the discrete first compensation unit, the second compensation unit reduces the number of pixels in a single compensation unit, reduces the discrete degree of the compensation value of each pixel in the compensation unit, reduces the difference between the compressed compensation data of the compensation unit and the original compensation data of each pixel, reduces the loss of the brightness compensation effect, can realize data compression and simultaneously keep the voltage drop compensation effect as much as possible, thereby improving the demura effect and improving the brightness uniformity of the whole display panel.
The data processing method and apparatus provided in the embodiment of the present application may be applicable to a driving chip of a Display panel such as an OLED (Organic Light-Emitting Diode) and an LCD (Liquid Crystal Display), may also be applicable to a Display module having the Display panel and the driving chip, and may also be applicable to an electronic device such as a mobile phone and a tablet computer having the Display module.
For better understanding, before proceeding with the detailed description, some aspects are described:
a display panel: the display device comprises a plurality of pixel units (hereinafter referred to as pixels) which are arranged in an array, and a driving chip provides voltage to drive the plurality of pixels to display a picture.
Compensation data: the driving chips are in one-to-one correspondence with the pixels in the display panel, and adjust the display brightness provided to the corresponding pixels based on the compensation data, so that the overall brightness uniformity of the display panel is improved.
Degree of dispersion: the degree of the variable values of the group of data far away from the central value thereof can reflect the difference degree between the variable values of the units in the whole group, thereby reflecting the representative height of the central value to each variable value. The degree of dispersion is high, which indicates that the degree of each variable value far away from the central value is high, the difference between the variable values is large, and the representativeness of the central value to each variable value is low; conversely, a low degree of dispersion indicates that the variable values are low in degree of separation from the central value, the difference between the variable values is small, and the central value is high in representativeness to the variable values.
In one embodiment, as shown in fig. 2, a data processing method is provided, which is exemplified by the application of the method to the driver chip in fig. 1, and includes the following steps:
in step S202, a compensation value of each pixel in at least one first compensation unit is obtained, where the first compensation unit includes a plurality of pixels adjacent to each other in the same display panel.
Wherein the pixels in the display panel are divided into a plurality of first compensation units. The compensation value of each pixel in the same compensation unit can be compressed into compensation data of the compensation unit and stored in a memory, and the storage space is saved and the implementation cost is reduced through data compression.
In practical applications, the number of pixels included in the first compensation unit can be set and adjusted according to practical requirements.
Illustratively, the plurality of first compensation units are arranged in an array.
In practical applications, the display panel includes a plurality of pixels arranged in an array, each pixel in the display panel is divided into a plurality of first compensation units, each first compensation unit includes a plurality of pixels adjacent to each other in the same display panel, and the pixels in the first compensation units are also arranged in an array. For example, the first compensation unit comprises 1 × 2 pixels, 2 × 4 pixels, 4 × 4 pixels, etc., the former number representing the number of rows of pixels and the latter number representing the number of columns of pixels; alternatively, the front number represents the number of columns of pixels and the rear number represents the number of rows of pixels. For example, if a compensation unit includes 4 × 4 pixels, the pixels in the compensation unit may be arranged in four rows and four columns.
Specifically, the compensation device first obtains an image of a display screen of the display panel, obtains luminance data of each pixel in the display panel based on the image, and then calculates the luminance data of each pixel by using a demura algorithm, so that compensation data of each pixel, that is, a compensation value of the pixel, can be obtained. The driving chip obtains the compensation value of each pixel in the display panel from the compensation equipment, and the compensation value of each pixel in the same compensation unit can be obtained according to the corresponding relation between the pixel and the first compensation unit.
And step S204, determining the type of the first compensation unit according to the compensation value, wherein the type of the first compensation unit comprises a discrete type and an aggregation type.
The discrete degree of the compensation value of each pixel in the discrete first compensation unit is larger than the discrete degree of the compensation value of each pixel in the aggregation first compensation unit.
The discrete degree of the compensation value of each pixel in the discrete first compensation unit is large, which indicates that the degree of the compensation value of each pixel in the compensation unit far away from the compensation data of the compensation unit is high, the difference between the compensation values of each pixel in the compensation unit is large, and the representativeness of the compensation data of the compensation unit to the compensation value of each pixel is low; the small degree of dispersion of the compensation values of the respective pixels in the aggregation-type first compensation unit indicates that the degree of separation of the compensation values of the respective pixels in the compensation unit from the compensation data of the compensation unit is low, the difference between the compensation values of the respective pixels in the compensation unit is small, and the representativeness of the compensation data of the compensation unit to the compensation values of the respective pixels is high.
Specifically, the discrete degree of the compensation value of each pixel in the first compensation unit is determined according to the compensation value of each pixel in the same first compensation unit, and then the type of each first compensation unit is determined to be discrete type or aggregation type according to the discrete degree of the compensation value of each pixel in at least one first compensation unit.
In step S206, the pixels in each discrete first compensation unit are divided into a plurality of second compensation units, so as to store the compensation data of each second compensation unit into the memory.
The number of pixels in the second compensation unit is smaller than that of pixels in the first compensation unit.
Specifically, the number of pixels in one first compensation unit may be equal to the number of pixels in the plurality of second compensation units. The pixels divided into one first compensation unit can be divided into a plurality of second compensation units, the number of the pixels in a single compensation unit is reduced, the dispersion degree of the compensation value of each pixel in the same compensation unit is reduced, the difference between the compensation data of the compensation unit and the compensation value of each pixel is reduced, the loss of the brightness compensation effect is reduced, and the demura effect is improved.
In practical applications, the proportional relationship between the first compensation unit and the second compensation unit in terms of the number of pixels can be set and adjusted according to actual needs.
Illustratively, a plurality of second compensation units into which pixels in one first compensation unit are divided are arranged in an array. For example, pixels in one first compensation cell are divided into 1 × 2 second compensation cells, 2 × 4 second compensation cells, 4 × 4 second compensation cells, and so on. Taking the example that the pixels in one first compensation unit are divided into 2 × 2 second compensation units, the second compensation units into which the pixels in the first compensation unit are divided are arranged in two rows and two columns.
In the data processing method, pixels in one display panel are divided into a plurality of first compensation units, compensation values of all pixels in at least one first compensation unit are obtained, the first compensation units comprise a plurality of pixels which are adjacent to each other in the same display panel, the type of the first compensation unit is determined to be a discrete type or an aggregation type according to the compensation values, the discrete degree of the compensation values of all pixels in the discrete first compensation units is larger than the discrete degree of the compensation values of all pixels in the aggregation type first compensation units, then the pixels in each discrete first compensation unit are divided into a plurality of second compensation units, and compensation data of each second compensation unit are stored in a memory. Compared with the discrete first compensation unit, the second compensation unit reduces the number of pixels in a single compensation unit, reduces the discrete degree of the compensation value of each pixel in the compensation unit, reduces the difference between the compressed compensation data of the compensation unit and the original compensation data of each pixel, reduces the loss of the brightness compensation effect, can realize data compression and simultaneously keep the voltage drop compensation effect as much as possible, thereby improving the demura effect and improving the brightness uniformity of the whole display panel.
In one embodiment, as shown in fig. 3, step S204 includes:
step S302, determining a discrete degree of the compensation value of each pixel in the first compensation unit according to the compensation value of each pixel in the same first compensation unit.
Illustratively, the degree of dispersion of the compensation values of the respective pixels in the first compensation unit is: one of a quartering difference, a variance, and a standard deviation of the compensation values of the respective pixels in the first compensation unit.
The quartile range is a difference between an upper quartile (i.e., located at 75%) and a lower quartile (i.e., located at 25%), specifically, after a group of data is sorted from small to large (or from large to small), all data is divided into four equal parts by three points, numerical values corresponding to the three points are called quartiles and respectively marked as Q1 (a first quartile), which indicates that 25% of the data is less than or equal to Q1, and Q2 (a second quartile, i.e., a median) indicates that 50% of the data is less than or equal to Q2, and Q3 (a third quartile) indicates that 75% of the data is less than or equal to Q3. The difference between Q3 and Q1 is a quartile difference.
The variance is the average of the squared values of the difference between each sample value and the average of the total sample values.
Standard deviation is a measure of how well a set of values diverge from the mean. A large standard deviation, which represents a large difference between most of the values and the average value; a smaller standard deviation indicates that these values are closer to the mean. During calculation, all numbers (the number is n) are recorded as an array [ n ]. Summing all the numbers of the array and dividing by n yields the arithmetic mean. The mean value is subtracted from all the numbers in the array, the n difference values are squared, all the squared numbers are summed, the number is divided or subtracted by one (n if the total standard deviation is found, and (n-1) if the sample standard deviation is found), and the arithmetic square root is obtained as the quotient of 1/2 th power, and the result is the standard deviation of the set of numbers (n data).
Specifically, the difference of four-fold of the compensation value of each pixel in the first compensation unit can be determined according to the compensation value of each pixel in the same first compensation unit; the variance of the compensation values of the pixels in the first compensation unit can also be determined according to the compensation values of the pixels in the same first compensation unit; the standard deviation of the compensation values of the pixels in the first compensation unit can also be determined according to the compensation values of the pixels in the same first compensation unit.
Step S304, sorting the first compensation units of the same display panel in order of decreasing discrete degrees.
Specifically, the degrees of dispersion of the compensation values of the respective pixels in the two first compensation units are compared, the first compensation unit having a large degree of dispersion being arranged at the front, and the first compensation unit having a small degree of dispersion being arranged at the rear.
And S306, selecting at least one first compensation unit from the first according to the sorted serial numbers as a discrete first compensation unit.
For example, the first compensation unit arranged first is selected as the discrete type first compensation unit. For another example, the first compensation units arranged in the first, second and third rows are selected as discrete first compensation units.
Specifically, the first compensation units other than the discrete first compensation unit are aggregation type first compensation units.
In this embodiment, the discrete degree of the compensation value of each pixel in the first compensation unit is determined according to the compensation value of each pixel in the same first compensation unit, the first compensation units of the same display panel are sorted in the order from the large discrete degree to the small discrete degree, and then at least one first compensation unit is selected as a discrete first compensation unit from the first according to the sorted serial number, so that the discrete first compensation unit is selected from the first compensation units of the display panel. And the number of the discrete first compensation units is set, so that the storage space is convenient to arrange.
In another embodiment, step S204 includes: determining the dispersion degree of the compensation value of each pixel in the first compensation unit according to the compensation value of each pixel in the same first compensation unit; and if the dispersion degree of the compensation value of each pixel in the first compensation unit is greater than or equal to the set threshold, judging that the first compensation unit is a discrete first compensation unit.
In this embodiment, the discrete degree of the compensation value of each pixel in the first compensation unit is determined according to the compensation value of each pixel in the same first compensation unit, and then the discrete degree of the compensation value of each pixel in the first compensation unit is compared with the set threshold, so that a discrete first compensation unit can be selected from each first compensation unit of the display panel.
In one embodiment, the method further comprises: pixels in the plurality of aggregation type first compensation units are divided into at least one third compensation unit to store compensation data of each third compensation unit into a memory.
The number of the pixels in the third compensation unit is larger than that of the pixels in the first compensation unit.
In the present embodiment, the pixels in the plurality of aggregation-type first compensation units are divided into at least one third compensation unit to store the compensation data of each third compensation unit into the memory. Compared with the first compensation unit which is divided into the aggregation type, the third compensation unit increases the number of pixels in a single compensation unit, so that the compression rate of data can be increased, the storage space can be saved, and the implementation cost can be reduced. And the discrete degree of the compensation value of each pixel in the aggregation type first compensation unit is low, the difference between the compensation values of each pixel is small, the influence of the change of the pixel number in the compensation unit on the compensation data can be ignored, the demora effect can not be deteriorated, and the integral brightness uniformity of the display panel is better.
In one implementation, at least one first compensation unit is selected as a first compensation unit of the aggregation type starting from an unused bit according to the sorted sequence numbers.
In the above implementation, the pixels in the first compensation unit with the earlier sequence number are re-divided into the second compensation unit, the pixels in the first compensation unit with the later sequence number are re-divided into the third compensation unit, and the pixels in the first compensation unit with the middle sequence number remain in the first compensation unit. If the first compensation unit with the front serial number and the first compensation unit with the rear serial number are added up to be equal to all the first compensation units of the display panel, no pixel is remained in the first compensation unit, and the pixels in each first compensation unit are divided into the second compensation unit or the third compensation unit again.
In another implementation manner, if the dispersion degree of the compensation value of each pixel in the first compensation unit is smaller than the aggregation threshold, the first compensation unit is determined to be a discrete first compensation unit.
In the above implementation, the pixels in the first compensation unit that are equal to or greater than the set threshold are re-divided into the second compensation unit, the pixels in the first compensation unit that are less than the set threshold and equal to or greater than the aggregation threshold remain in the first compensation unit, and the pixels in the first compensation unit that are equal to or less than the aggregation threshold are re-divided into the third compensation unit. If the set threshold is equal to the aggregation threshold, no pixels remain in the first compensation units, and the pixels in each first compensation unit are re-divided into the second compensation unit or the third compensation unit.
Illustratively, the sum of the numbers of the third compensation units and the second compensation units is equal to the number of the plurality of first compensation units of the same display panel, which are divided anew. The number of the compensation units increased in the second compensation unit is offset by the number of the compensation units decreased in the third compensation unit, so that the storage space does not need to be changed, and the realization is more convenient.
In one embodiment, the method further comprises: and determining compensation data corresponding to the compensation units according to the compensation values of the pixels, wherein the compensation units at least comprise second compensation units.
In this embodiment, the compensation data corresponding to the compensation unit is determined according to the compensation value of each pixel, that is, the compensation values of a plurality of pixels can be reduced to the compensation data of one compensation unit, so as to implement data compression, thereby saving storage space and reducing implementation cost.
Specifically, if pixels in a plurality of first compensation units of the aggregation type are divided into at least one third compensation unit, the compensation units further include the third compensation unit; the compensation unit further includes a first compensation unit if pixels in the plurality of aggregation-type first compensation units are not divided into at least one third compensation unit.
Illustratively, the compensation data of the compensation unit is an average value of the compensation values of the respective pixels in the compensation unit. In other embodiments, the compensation data of the compensation unit may also be a median of the compensation values of the respective pixels in the compensation unit.
In one embodiment, the method further comprises: the compensation data of the respective compensation units of the same display panel and the position information in the display panel are stored in a memory.
In this embodiment, the compensation data of each compensation unit of the same display panel and the position information in the display panel are stored in the memory so as to be called from the memory in the subsequent use.
In one embodiment, the method further comprises: and determining the compensation value of each pixel in each compensation unit according to the compensation data of each compensation unit of the display panel and the position information in the display panel.
In this embodiment, the compensation value of each pixel in each compensation unit is determined according to the compensation data of each compensation unit of the display panel and the position information in the display panel, so that the pixels can be subjected to brightness compensation according to the compensation value of each pixel in the following process.
In practical applications, when the compensation unit includes the second compensation unit and the first compensation unit, or the compensation unit includes the second compensation unit and the third compensation unit, the memory may store only the position information of the second compensation unit in the display panel, or store the position information of the second compensation unit and the first compensation unit (or the third compensation unit) in the display panel, and at this time, the distribution area of each compensation unit of the display panel is determined according to the position information of the second compensation unit in the display panel. And then the compensation data of each compensation unit is used as the compensation value of each pixel in the corresponding distribution area. Similarly, when the compensation unit includes the first compensation unit, the second compensation unit, and the third compensation unit, the memory may store only the position information of the second compensation unit and the third compensation unit in the display panel, or store all the position information of the first compensation unit, the second compensation unit, and the third compensation unit, so as to determine the distribution area of each compensation unit of the display panel.
Specifically, the distribution area of the second compensation unit in the display panel and the distribution area of the non-second compensation unit (the first compensation unit and/or the third compensation unit) in the display panel are determined first according to the position information in the display panel. Then, on the one hand, the pixels of the second compensation unit in the distribution area of the display panel are divided into a plurality of second compensation units according to the number of the pixels in the second compensation unit. On the other hand, the pixels of the non-second compensation unit in the distribution area of the display panel are divided into a plurality of first compensation units according to the number of the pixels in the first compensation units; or, the pixels of the non-second compensation unit in the distribution area of the display panel are divided into a plurality of third compensation units according to the number of the pixels in the third compensation units. And finally, according to the corresponding relation between the arrangement position of each compensation unit on the display panel and the sequence of the compensation data of each compensation unit, taking the compensation data of each compensation unit as the compensation value of each pixel in the corresponding distribution area.
As shown in fig. 4, a data processing method is provided, which is a specific implementation of the data processing method shown in fig. 2, and includes the following steps:
in step S402, a compensation value of each pixel in each first compensation unit of a display panel is obtained, where the display panel includes a plurality of first compensation units, and the first compensation units include a plurality of pixels adjacent to each other in the display panel.
Step S404, determining a discrete degree of the compensation value of each pixel in each first compensation unit according to the compensation value of each pixel in each first compensation unit.
Step S406, determining the type of each first compensation unit according to the discrete degree of the compensation value of each pixel in each first compensation unit, wherein the type of each first compensation unit comprises a discrete type and an aggregation type.
In step S408, the pixels in each discrete first compensation unit are divided into a plurality of second compensation units.
Step S410, determining compensation data of each compensation unit according to the compensation value of each pixel in each compensation unit, wherein the compensation unit includes a first compensation unit and a second compensation unit.
In step S412, the compensation data of the respective compensation units of the display panel and the position information in the display panel are stored into the memory.
As shown in fig. 5, a data processing method is provided, which is another specific implementation of the data processing method shown in fig. 2, and includes the following steps:
step S502, obtaining a compensation value of each pixel in each first compensation unit of a display panel, where the display panel includes a plurality of first compensation units, and the first compensation units include a plurality of pixels adjacent to each other in the display panel.
Step S504, determining a discrete degree of the compensation value of each pixel in each first compensation unit according to the compensation value of each pixel in each first compensation unit.
Step S506, determining a type of each first compensation unit according to the discrete degree of the compensation value of each pixel in each first compensation unit, wherein the type of the first compensation unit includes a discrete type and an aggregation type.
In step S508, the pixels in each discrete first compensation unit are divided into a plurality of second compensation units.
In step S510, pixels in the plurality of first compensation units of the aggregation type are divided into at least one third compensation unit.
Step S512, determining compensation data of each compensation unit according to the compensation value of each pixel in each compensation unit, wherein the compensation unit comprises a second compensation unit and a third compensation unit.
Step S514, the compensation data of each compensation unit of the display panel and the position information in the display panel are stored into the memory.
For example, the first compensation unit includes 4 × 4 pixels, and the pixel compensation values of a part of the first compensation units a in the display panel are shown in fig. 6. Wherein, the thick line squares represent compensation units, and the thin line squares represent pixels.
The prior art determines the compensation data of each first compensation unit directly according to the compensation value of each pixel in each first compensation unit, as shown in fig. 7. Comparing fig. 7 with fig. 6, it can be seen that the difference between the compensation data of the first compensation unit a at the upper left corner and the compensation value of each pixel is large, the voltage drop compensation effect of this first compensation unit a has a large loss, and the demura effect is not good.
The data processing method shown in fig. 4 determines the type of the first compensation unit a at the upper left corner as a discrete type according to the compensation value of each pixel in each first compensation unit. The pixels in the first compensation cell a in the upper left corner are divided into four second compensation cells B, each of which includes 2 × 2 pixels, as shown in fig. 8. The compensation data of each first compensation unit a is determined according to the compensation value of each pixel in each first compensation unit a, and the compensation data of each second compensation unit B is determined according to the compensation value of each pixel in each second compensation unit B, as shown in fig. 9. Comparing fig. 9 with fig. 6, it can be seen that the difference between the compensation data of each first compensation unit a and the compensation value of each pixel is small, the difference between the compensation data of each second compensation unit B and the compensation value of each pixel is also small, the voltage drop compensation effect of each compensation unit is not substantially lost, and the demura effect is good.
The data processing method shown in fig. 5 determines the type of the first compensation unit a at the top left corner is of a discrete type and the types of the first compensation units a except the first compensation unit a at the top left corner are of an aggregation type according to the compensation value of each pixel in each first compensation unit. Dividing pixels in the first compensation unit A at the upper left corner into four second compensation units B, wherein each second compensation unit B comprises 2 x 2 pixels; the pixels in the first compensation unit a at the upper right corner, the lower left corner and the lower right corner are divided into a third compensation unit C, as shown in fig. 10. The compensation data of each second compensation unit B is determined according to the compensation value of each pixel in each second compensation unit B, and the compensation data of the third compensation unit C is determined according to the compensation value of each pixel in the third compensation unit C, as shown in fig. 11. Comparing fig. 11 with fig. 6, it can be seen that the difference between the compensation data of each second compensation unit B and the compensation value of each pixel is small, the difference between the compensation data of each third compensation unit C and the compensation value of each pixel is small, the voltage drop compensation effect of each compensation unit is not substantially lost, and the demura effect is good.
Therefore, the data processing method provided by the application can keep the voltage drop compensation effect as far as possible while realizing data compression, improve the demura effect and improve the overall brightness uniformity of the display panel.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
In one embodiment, as shown in fig. 12, a method for compensating luminance is provided, which is exemplified by the method applied to the driving chip in fig. 1, and includes the following steps:
in step S1202, the compensation value of each pixel in each compensation unit is determined according to the data processing method provided in the above embodiment.
In step S1204, luminance compensation is performed on the pixels according to the compensation value of each pixel.
Based on the same inventive concept, the embodiment of the present application further provides a data processing apparatus for implementing the above-mentioned data processing method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more embodiments of the data processing device provided below may refer to the limitations on the data processing method in the above description, and are not described herein again.
In one embodiment, as shown in fig. 13, there is provided a data processing apparatus 1300 comprising: a compensation value obtaining module 1301, a type determining module 1302 and a dividing module 1303, wherein:
a compensation value obtaining module 1301, configured to obtain a compensation value of each pixel in at least one first compensation unit, where the first compensation unit includes a plurality of pixels adjacent to each other in the same display panel.
A type determining module 1302, configured to determine a type of the first compensation unit according to the compensation value, where the type of the first compensation unit includes a discrete type and an aggregation type, and a degree of dispersion of the compensation value of each pixel in the discrete type of the first compensation unit is greater than a degree of dispersion of the compensation value of each pixel in the aggregation type of the first compensation unit.
And a dividing module 1303, configured to divide the pixels in each discrete first compensation unit into a plurality of second compensation units, so as to store the compensation data of each second compensation unit into the memory.
In one embodiment, the type determination module 1302 includes: a discrete determination unit, a sorting unit and a type determination unit, wherein:
and the dispersion determining unit is used for determining the dispersion degree of the compensation value of each pixel in the first compensation unit according to the compensation value of each pixel in the same first compensation unit.
And the sequencing unit is used for sequencing the first compensation units of the same display panel from large to small according to the sequence of the discrete degrees.
And the type determining unit is used for selecting at least one first compensation unit from the first according to the sorted serial numbers as a discrete first compensation unit.
In one embodiment, the degree of dispersion of the compensation values of the respective pixels in the first compensation unit is: one of a quartering difference, a variance, and a standard deviation of the compensation values of the respective pixels in the first compensation unit.
In one embodiment, the dividing module 1303 is further configured to divide the pixels in the first compensation units of the aggregation type into at least one third compensation unit to store the compensation data of each third compensation unit into the memory.
In one embodiment, the apparatus further comprises: a data determination module, wherein:
and the data determining module is used for determining compensation data corresponding to the compensation unit according to the compensation value of each pixel, and the compensation unit at least comprises a second compensation unit.
Illustratively, the compensation data of the compensation unit is an average value of the compensation values of the respective pixels in the compensation unit.
In one embodiment, the apparatus further comprises: a storage module, wherein:
and the storage module is used for storing the compensation data of each compensation unit of the same display panel and the position information in the display panel into the memory.
In one embodiment, the apparatus further comprises: a compensation value determination module, wherein:
and the compensation value determining module is used for determining the compensation value of each pixel in each compensation unit according to the compensation data of each compensation unit of the display panel and the position information in the display panel.
In one embodiment, as shown in fig. 14, there is provided an illumination compensation apparatus 1400, including: a determination module 1401 and a compensation module 1402, wherein:
a determining module 1401, configured to determine compensation values of the pixels in each compensation unit according to the data processing method provided in the foregoing embodiment.
The compensation module 1402 is configured to perform brightness compensation on the pixels according to the compensation value of each pixel.
The various modules in the data processing apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a display driver chip is provided, and an internal structural diagram thereof may be as shown in fig. 15. The display driving chip comprises a processor, a memory and a network interface which are connected through a system bus. Wherein, the processor of the display driving chip is used for providing calculation and control capability. The memory of the display driving chip includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a data processing method or a brightness compensation method.
Those skilled in the art will appreciate that the architecture shown in fig. 15 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a display driver chip is provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps in the above embodiments when executing the computer program.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when executed by a processor, performs the steps in the embodiments described above.
In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, performs the steps of the embodiments described above.
It should be noted that, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), Magnetic Random Access Memory (MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A method of data processing, the method comprising:
acquiring compensation values of pixels in at least one first compensation unit, wherein the first compensation unit comprises a plurality of pixels adjacent to each other in the same display panel;
determining the type of the first compensation unit according to the compensation value, wherein the type of the first compensation unit comprises a discrete type and an aggregation type, and the discrete degree of the compensation value of each pixel in the discrete type first compensation unit is greater than the discrete degree of the compensation value of each pixel in the aggregation type first compensation unit;
the pixels in each discrete first compensation unit are divided into a plurality of second compensation units so as to store the compensation data of each second compensation unit into a memory.
2. The method of claim 1, wherein determining the type of the first compensation unit based on the compensation value comprises:
determining the dispersion degree of the compensation value of each pixel in the first compensation unit according to the compensation value of each pixel in the same first compensation unit;
sequencing the first compensation units of the same display panel according to the sequence of the discrete degrees from large to small;
selecting at least one first compensation unit from the first according to the sorted serial numbers as a discrete first compensation unit;
or, the determining the type of the first compensation unit according to the compensation value includes:
determining the dispersion degree of the compensation value of each pixel in the first compensation unit according to the compensation value of each pixel in the same first compensation unit;
and if the discrete degree of the compensation value of each pixel in the first compensation unit is greater than or equal to a set threshold value, determining that the first compensation unit is a discrete first compensation unit.
3. The method according to claim 2, wherein the discrete degree of the compensation value of each pixel in the first compensation unit is: one of a quartering difference, a variance, and a standard deviation of compensation values of the respective pixels in the first compensation unit.
4. The method of claim 1, further comprising:
the pixels in the first compensation units of a plurality of aggregation types are divided into at least one third compensation unit so as to store the compensation data of each third compensation unit into a memory.
5. The method according to any one of claims 1-4, further comprising:
determining compensation data corresponding to a compensation unit according to the compensation value of each pixel, wherein the compensation unit at least comprises a second compensation unit;
preferably, the compensation data of the compensation unit is an average value of compensation values of the pixels in the compensation unit.
6. The method of claim 5, further comprising:
and storing the compensation data of each compensation unit of the same display panel and the position information in the display panel into a memory.
7. The method of claim 6, further comprising:
and determining the compensation value of each pixel in each compensation unit according to the compensation data of each compensation unit of the display panel and the position information in the display panel.
8. A method of brightness compensation, the method comprising:
the method of claim 7, determining compensation values for respective pixels in each of the compensation units;
and performing brightness compensation on the pixels according to the compensation value of each pixel.
9. A data processing apparatus, characterized in that the apparatus comprises:
a compensation value obtaining module, configured to obtain a compensation value of each pixel in at least one first compensation unit, where the first compensation unit includes a plurality of pixels adjacent to each other in the same display panel;
the type determining module is used for determining the type of the first compensation unit according to the compensation value, the type of the first compensation unit comprises a discrete type and an aggregation type, and the discrete degree of the compensation value of each pixel in the discrete type first compensation unit is greater than the discrete degree of the compensation value of each pixel in the aggregation type first compensation unit;
the dividing module is used for dividing the pixels in each discrete first compensation unit into a plurality of second compensation units so as to store the compensation data of each second compensation unit into a memory.
10. A luminance compensation apparatus, characterized in that the apparatus comprises:
a determining module for determining a compensation value for each pixel in each of the compensation units according to the method of claim 7;
and the compensation module is used for performing brightness compensation on the pixels according to the compensation value of each pixel.
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