CN114360458B - Display data compensation method, circuit and display device - Google Patents
Display data compensation method, circuit and display device Download PDFInfo
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Abstract
The invention discloses a method, a circuit and a display device for display data compensation, which are used for solving the technical problem that an OLED display module in the prior art is easy to generate line crosstalk phenomenon when in real picture, and comprise the following steps: acquiring pixel data of a current line to be displayed in an image to be displayed and pixel data of a next line of the pixel data of the current line, comparing the difference between the pixel data of the current line and the pixel data of the next line of the pixel data of the current line, and acquiring an initial gray scale of the pixel data of the current line, a total amount of jump of the gray scale jump and an average gray scale difference of all the pixel data of the gray scale jump from a comparison result; the initial gray scale is the average gray scale value of pixel data with jumping gray scale in the pixel data of the current line; determining a first compensation gray scale for gray scale compensation of the pixels of the current line based on the initial gray scale, the average gray scale difference and the jumping number; and compensating the pixel data of the current line by using the first compensation gray scale to obtain the compensated pixel data of the current line.
Description
Technical Field
The present invention relates to the field of display, and in particular, to a method and a circuit for compensating display data, and a display device.
Background
The quality of the display image of an Organic Light-Emitting Diode (OLED) display module is usually affected by the stability of the anode voltage (ELVDD) of the OLED display module, and when there is interference on the ELVDD voltage, the display image may be distorted or even display abnormal.
In the display field, due to the pursuit of higher resolution and higher refresh rate, the layout and wiring space of the OLED display module is further limited, and the coupling interference of the display data voltage (data voltage) to the ELVDD cannot be avoided in the panel (panel) process and design during the display process. The interference band causes a Line crosstalk (Line crosstalk) phenomenon when the OLED display module displays certain specific pictures.
Currently, some manufacturers of OLED display modules and some manufacturers of terminal devices adopt a Line cross Property (IP) compensation kernel to improve the display effect of the display module. However, in the current overall compensation concept adopted by the IP, the compensation amount is determined by simply calculating the difference value between two lines of display data, so that in practical application, the improvement effect on the OLED display module is poor, and even the Line cross talk phenomenon is aggravated under a specific picture.
Therefore, how to effectively improve the phenomenon that the OLED display module is prone to line crosstalk in real pictures becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention provides a method and a circuit for compensating display data and a display device, which are used for solving the technical problem that an OLED display module in the prior art is easy to generate a line crosstalk phenomenon in a real picture.
In a first aspect, to solve the above technical problem, a technical solution of a method for compensating display data according to an embodiment of the present invention is as follows:
acquiring pixel data of a current line to be displayed in an image to be displayed and pixel data of a next line of the pixel data of the current line;
comparing the difference between the pixel data of the current row and the pixel data of the next row, and acquiring the initial gray scale of the pixel data of the current row, the total amount of gray scale jump of the pixel data in the pixel data of the current row, and the average gray scale difference between all the pixel data of the current row subjected to gray scale jump and the corresponding pixel data in the pixel data of the next row from the comparison result; the initial gray scale is the average gray scale value of pixel data with jumping gray scale in the pixel data of the current line;
determining a first compensation gray scale for gray scale compensation of the current row pixels based on the initial gray scale, the average gray scale difference and the jump number;
and compensating the pixel data of the current line by using the first compensation gray scale to obtain the compensated pixel data of the current line.
In one possible embodiment, obtaining a start gray level of the pixel data of the current row, a total amount of pixel data in the pixel data of the current row subjected to gray level transition, and an average gray level difference between all pixel data in the pixel data of the current row subjected to gray level transition and corresponding pixel data in the pixel data of the next row from the comparison result includes:
determining pixel data with gray scale jump from the pixel data of the current line, and counting the corresponding jump total amount;
calculating the average gray scale value of the pixel data with gray scale jump in the pixel data of the current line to obtain the initial gray scale;
calculating the average gray scale value of pixel data corresponding to the pixel data with gray scale jump in the pixel data of the current row in the pixels of the next row to obtain a termination gray scale;
and performing difference operation on the initial gray scale and the termination gray scale to obtain the average gray scale difference.
One possible implementation manner of determining the pixel data with gray level jump from the pixel data of the current row includes:
comparing each pixel data in the pixel data of the current row with the pixel data corresponding to the same column in the pixel data of the next row;
and if the two pixel data in the same column in the pixel data of the current row and the pixel data of the next row are the same, determining that no gray scale jump occurs in the corresponding pixel data in the pixel data of the current row, otherwise, determining that the gray scale jump occurs in the corresponding pixel data in the pixel data of the current row.
One possible implementation manner of determining a first compensation gray scale for gray scale compensation of the current row of pixels based on the starting gray scale, the average gray scale difference and the transition number includes:
acquiring a second compensation gray scale corresponding to the average gray scale difference from a preset compensation gray scale lookup table; the preset compensation gray scale lookup table is used for recording second compensation gray scales corresponding to different average gray scale differences;
determining a compensation coefficient corresponding to the second compensation gray scale based on a factor related to line crosstalk generated when the pixel data of the current row is displayed;
and performing product operation on the second compensation gray scale and the compensation coefficient to obtain the first compensation gray scale.
One possible implementation manner, determining the compensation coefficient corresponding to the second compensation gray scale based on a factor related to line crosstalk occurring when the pixel data of the current row is displayed, includes:
acquiring a coefficient lookup table corresponding to each factor, and acquiring the coefficient of the corresponding factor from the coefficient lookup table;
and performing product operation on the coefficients of all the factors to obtain the compensation coefficient.
One possible implementation manner, performing a product operation on the coefficients of all the factors to obtain the compensation coefficient, includes:
and performing product operation on the coefficients of all the factors and the row coefficients representing the influence range of the line crosstalk to obtain the compensation coefficients.
In one possible embodiment, the factor includes:
the initial gray scale, the total jump amount and the current brightness of a display module for displaying the compensated pixel data of the current line.
In a second aspect, an embodiment of the present invention provides a circuit for compensating display data, including:
the line data buffer is used for storing the pixel data of a current line to be displayed in the image to be displayed and the pixel data of a line next to the pixel data of the current line;
the comparison circuit is used for comparing the difference between the pixel data of the current line and the pixel data of the next line, and acquiring the initial gray scale of the pixel data of the current line, the total amount of the pixel data in the pixel data of the current line subjected to gray scale jump, and the average gray scale difference between all the pixel data in the pixel data of the current line subjected to gray scale jump and the corresponding pixel data in the pixel data of the next line from the comparison result; the initial gray scale is the average gray scale value of pixel data with jumping gray scale in the pixel data of the current line;
the operation circuit is used for determining a first compensation gray scale for gray scale compensation of the pixels on the current line based on the initial gray scale, the average gray scale difference and the jump number; and compensating the pixel data of the current line by using the first compensation gray scale to obtain the compensated pixel data of the current line.
In one possible implementation, the comparison circuit is further configured to:
determining pixel data with gray scale jump from the pixel data of the current line, and counting the corresponding jump total amount;
calculating the average gray scale value of the pixel data with gray scale jump in the pixel data of the current line to obtain the initial gray scale;
calculating the average gray scale value of pixel data corresponding to the pixel data with gray scale jump in the pixel data of the current line in the pixels of the next line to obtain a termination gray scale;
and performing difference operation on the initial gray scale and the termination gray scale to obtain the average gray scale difference.
In one possible implementation, the comparison circuit is further configured to:
comparing each pixel data in the pixel data of the current row with the pixel data corresponding to the same column in the pixel data of the next row;
and if the two pixel data in the same column in the pixel data of the current row and the pixel data of the next row are the same, determining that the gray scale jump does not occur to the corresponding pixel data in the pixel data of the current row, otherwise, determining that the gray scale jump occurs to the corresponding pixel data in the pixel data of the current row.
In one possible implementation, the arithmetic circuit includes:
the searching circuit is used for acquiring a second compensation gray scale corresponding to the average gray scale difference from a preset compensation gray scale searching table; the preset compensation gray scale lookup table is used for recording second compensation gray scales corresponding to different average gray scale differences; determining a compensation coefficient corresponding to the second compensation gray scale based on a factor related to line crosstalk generated when the pixel data of the current row is displayed;
and the multiplier is used for carrying out product operation on the second compensation gray scale and the compensation coefficient to obtain the first compensation gray scale.
In one possible implementation, the lookup circuit is further configured to:
acquiring a coefficient lookup table corresponding to each factor, and acquiring the coefficient of the corresponding factor from the coefficient lookup table;
and performing product operation on the coefficients of all the factors to obtain the compensation coefficient.
In one possible implementation, the lookup circuit is further configured to:
and performing product operation on the coefficients of all the factors and the row coefficients representing the influence range of the line crosstalk to obtain the compensation coefficients.
In one possible embodiment, the factor includes:
the initial gray scale, the total jump amount and the current brightness of the display module displaying the compensated pixel data of the current line.
In a third aspect, an embodiment of the present invention further provides a display apparatus, including the circuit for compensating display data according to the second aspect.
Drawings
FIG. 1 is a schematic diagram illustrating a Line crosstalk phenomenon according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a Line cross phenomenon occurring in an OLED display module according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for compensating display data according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of pixel data of an image to be displayed according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a display data compensation circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another display data compensation circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another display data compensation circuit according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method and a circuit for compensating display data and a display device, which are used for solving the technical problem that an OLED display module in the prior art is easy to generate a line crosstalk phenomenon when a real picture is displayed.
In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the examples of the present invention are the detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and the examples of the present invention may be combined with each other without conflict.
The inventor finds that whether the OLED display module can normally display the display image depends on the driving voltage EL (e.g., ELVDD) and the data voltage. The EL voltage is a direct current voltage, the EL voltage is generally kept stable and is not doped with ripples in the display process, the data voltage depends on the current displayed picture of the OLED display module, and each sub-pixel voltage in the OLED display module is an independent unit. When the OLED display module displays a non-pure color picture, the data voltage needs to jump continuously. In the panel design, a coupling path usually exists between the data trace and the ELVDD trace, the jump influence of the data voltage is applied to the ELVDD trace through the coupling path, and ripples appear on the ELVDD trace, so that the brightness of the current display pixel is influenced, and a Line cross phenomenon is caused.
Fig. 1 is a schematic diagram of a Line cross talk phenomenon according to an embodiment of the present invention.
In fig. 1, the horizontal axis represents time, the vertical axis represents voltage amplitude, a Gate in fig. 1 illustrates a voltage waveform on a data line in an OLED display module, a data transition in the invention is a process of a Gate jumping from a high level to a low level or from a low level to a high level at a certain time on the data line, and a voltage waveform on an ELVDD line coupled to the data line is also illustrated in fig. 1, it can be seen from fig. 1 that the voltage on the ELVDD line is constant when the voltage on the Gate does not jump, and the voltage on the ELVDD fluctuates after the voltage on the Gate jumps, which is referred to as ELVDD fluctuation. When ELVDD fluctuates, the OLED display module may generate a Line cross near the corresponding Line. Fig. 2 is a schematic view of a Line cross talk phenomenon occurring in an OLED display module according to an embodiment of the invention. In general, the Line cross phenomenon is more noticeable in a picture with a white background and a black frame, and the white background is not illustrated in dark gray in fig. 2 for convenience of observation.
In order to effectively improve the phenomenon that the above Line cross talk is easy to occur when an OLED display module is in a real picture, the invention provides the following solution:
referring to fig. 3, an embodiment of the invention provides a method for compensating display data, and the processing procedure of the method is as follows.
Step 301: acquiring pixel data of a current line to be displayed in an image to be displayed and pixel data of a next line of the pixel data of the current line;
step 302: comparing the difference between the pixel data of the current row and the pixel data of the next row, and acquiring the initial gray scale of the pixel data of the current row, the total amount of gray scale jump of the pixel data in the pixel data of the current row, and the average gray scale difference between all the pixel data of the current row subjected to gray scale jump and the corresponding pixel data in the pixel data of the next row from the comparison result; the initial gray scale is the average gray scale value of the pixel data with the jump gray scale in the pixel data of the current line.
For example, please refer to fig. 4, which is a schematic diagram of pixel data of an image to be displayed according to an embodiment of the present invention.
Assuming that the display module needs to display data corresponding to pixels of the (m-1) th row at present, then data of pixels of the (m-1) th row and the (m) th row are obtained from the image to be displayed shown in fig. 4, in the present invention, the (m-1) th row is referred to as a current row, and the (m) th row is referred to as a next row of the current row, then the data corresponding to the pixels of the (m-1) th row is referred to as current row pixel data, and the data corresponding to the pixels of the (m) th row is referred to as next row pixel data of the current row.
For convenience of illustration, taking the last pixel data (127) of the m-1 th row in fig. 4 as an example, if the pixel data of the same column in the m-1 th row is 0, and the two pixel data are different, it is determined that the gray level of the last pixel data of the m-1 th row has a jump, similarly, by comparing the difference between the other data of the m-1 th row of pixels in fig. 4 and the corresponding data of the m-1 th row of pixels, it can be obtained that the comparison result is that a plurality (assumed as N) of pixel data in the m-1 th row of pixels have a gray level jump, the initial gray level of the pixel data of the current row (i.e., the data of the m-1 th row of pixels) can be determined according to the N pixel data, and the average gray level difference between the N pixel data and the corresponding pixel data in the pixel data of the next row (i.e., the data of the m-1 th row of pixels) can be determined.
If the data of the n-1 th row of pixels needs to be displayed currently, the data of the n-1 th row of pixels is called current row pixel data, and the data of the n-1 th row of pixels is called next row pixel data. The similar method can be adopted to determine which data in the data of the n-1 th row of pixels have gray scale jump, and further determine the initial gray scale of the n-1 th current row of pixel data, the total number of pixels having gray scale jump in the pixel data of the current row of pixels and the average gray scale difference.
In one possible embodiment, the comparison result is used to obtain a starting gray scale of the pixel data in the current row, a total amount of gray scale jumps of the pixel data in the current row, and an average gray scale difference between all the pixel data of the pixel data in the current row with the corresponding pixel data in the next row, which may be implemented as follows:
determining pixel data with gray scale jump from the pixel data of the current line, and counting the corresponding jump total amount; calculating the average gray scale value of the pixel data with gray scale jump in the pixel data of the current row to obtain an initial gray scale; calculating the average gray scale value of pixel data corresponding to the pixel data with gray scale jump in the pixel data of the current row in the pixels of the next row to obtain a termination gray scale; and performing difference operation on the initial gray scale and the termination gray scale to obtain an average gray scale difference.
The determination of the pixel data with the gray scale jump from the pixel data of the current row can be realized by adopting the following modes: comparing each pixel data in the pixel data of the current row with the pixel data corresponding to the same column in the pixel data of the next row; and if the pixel data of the current line is the same as the pixel data of the next line in the two pixel data in the same column, determining that the corresponding pixel data in the pixel data of the current line has no gray scale jump, otherwise, determining that the corresponding pixel data in the pixel data of the current line has the gray scale jump.
For example, taking the data of the pixels in the n-1 th row in fig. 4 as the current row pixel data as an example, starting from the first column of pixel data of the pixels in the n-1 th row, the data is compared with the same column of pixel data in the n-1 th row, whether the first column of pixel data of the pixels in the n-1 th row is the same as the corresponding column of pixel data in the n-1 th row is determined, and if the comparison result is different, it is determined that the gray level jump occurs to the first column of pixel data of the pixels in the n-1 th row, and similarly, it may be determined whether the gray level jump occurs to other pixel data in the n-1 th row. Further, the total amount of the jump of the pixel data with the gray level jump in the pixel data of the current row is counted as M, and the average gray level value of the M pixel data (i.e. the gray levels and/M of the M pixel data) is calculated and used as the initial gray level (denoted as S) of the pixel data of the current row. Meanwhile, the gray-scale differences of the pixel data of the M pixels in the current row in the pixel data of the next row (i.e., the data of the pixel in the nth row) in the same column are calculated, the average value (i.e., the average gray-scale value) of the gray-scale differences is calculated, the ending gray-scale (denoted as E) of the current row pixel data is obtained, and the difference operation is performed on the starting gray-scale and the ending gray-scale to obtain the average gray-scale difference (denoted as δ, δ = S-E).
The comparison process can be realized by a comparison circuit (such as a subtracter), the obtained current line pixel data and the next line pixel data can be respectively and temporarily stored in different line data buffers, and then the comparison circuit is used for comparing the same column data in the line data buffers respectively corresponding to the current line pixel data and the next line pixel data to obtain the initial gray scale of the current line pixel data, the total amount of gray scale jump of the pixel data in the current line pixel data, and the average gray scale difference of all the pixel data with the gray scale jump of the pixel data in the current line pixel data and the corresponding pixel data in the next line pixel data.
After obtaining the initial gray level, the total amount of the pixel data in the current row that has undergone gray level transition, and the average gray level difference, step 303 can be executed.
Step 303: and determining a first compensation gray scale for gray scale compensation of the pixels of the current line based on the initial gray scale, the average gray scale difference and the jumping number.
Determining a first compensation gray scale for gray scale compensation of the pixels of the current row based on the initial gray scale, the average gray scale difference and the jumping number, which can be realized by the following steps:
acquiring a second compensation gray scale corresponding to the average gray scale difference from a preset compensation gray scale lookup table; the preset compensation gray scale lookup table is used for recording second compensation gray scales corresponding to different average gray scale differences; determining a compensation coefficient corresponding to the second compensation gray scale based on a factor related to line crosstalk generated when the pixel data of the current row is displayed; and performing product operation on the second compensation gray scale and the compensation coefficient to obtain a first compensation gray scale.
The compensation gray scale base number (called as a second compensation gray scale in the invention) corresponding to different average gray scale differences can be determined by compensating the function C (delta) of the gray scale base number, wherein delta is the average gray scale difference, in order to improve the processing speed, the second compensation gray scales corresponding to different average gray scale differences can be formed into a lookup table which is called as a preset compensation gray scale lookup table in the invention, so that after the average gray scale difference corresponding to the pixel data of the current line is calculated in real time, the corresponding second compensation gray scale can be quickly searched from the preset compensation gray scale lookup table.
Please refer to table 1 for a preset compensation gray level lookup table according to an embodiment of the present invention.
TABLE 1
In the above table 1, points 1 to Point m represent m rows in the display modulePixel data, δ 1 ～δ m It should be understood that the signs of the values of the average gray level differences are not shown in table 1, in practical applications, the average gray level differences have positive and negative values, and the corresponding second compensation gray levels also have positive and negative values, in table 1, the sign "N" is provided in the corresponding second compensation gray level when the average gray level difference is negative, and the sign "P" is provided in the corresponding second compensation gray level when the average gray level difference is positive, and the corresponding second compensation gray level is C when the Point1 is negative 1 N, point1 is positive, the corresponding second compensation gray scale is C 1 _P。
Because there are multiple factors related to the occurrence of the line crosstalk of the pixel data of the current row during the display, such as the initial gray scale, the total amount of the jump of the pixels with the sudden change of the gray scale in the pixel data of the current row, the current brightness of the display module displaying the compensated pixel data of the current row, and the like, the compensation coefficient corresponding to the second compensation gray scale can be determined based on all factors affecting the display of the pixel data of the current row during the occurrence of the line crosstalk.
The compensation coefficient can be realized by the following modes:
acquiring a coefficient lookup table corresponding to each factor, and acquiring the coefficient of the corresponding factor from the coefficient lookup table; and performing product operation on the coefficients of all the factors to obtain a compensation coefficient.
If the factor related to the line crosstalk generated when the pixel data of the current row is displayed includes the initial gray scale and the jump total amount of the pixels with gray scale abrupt change in the pixel data of the current row, finding a coefficient a corresponding to the initial gray scale of the pixel data of the current row from an initial gray scale coefficient lookup table corresponding to the initial gray scale, finding a coefficient β corresponding to the jump total amount of the pixel data from a jump total amount coefficient lookup table corresponding to the jump total amount, taking the product of the coefficient a and the coefficient β as a compensation coefficient (K, K = a × β), and taking the product of the determined second compensation gray scale and the compensation coefficient as a first compensation gray scale.
The coefficient a corresponding to the start gray scale may be determined by a function a (S), and the coefficient β corresponding to the total amount of transition may be determined by a function β (P), where S is the start gray scale, and P is the total amount of transition of pixels having gray scale transition in pixel data of a current row, and the function a (S) and the function β (P) may be used to obtain a start gray scale coefficient lookup table and a total amount of transition coefficient lookup table, respectively, please refer to the start gray scale coefficient lookup table provided by the embodiment of the present invention in table 2, and the total amount of transition coefficient lookup table provided by the embodiment of the present invention in table 3.
TABLE 2
S in Table 2 1 ～S m Is the value of the initial gray scale corresponding to the m lines of pixel data in the display module 1 ～а m Is S 1 ～S m The corresponding coefficients.
TABLE 3
P in Table 3 1 ～P m Sending a value of a total amount of pixel transitions, beta, of gray scale transitions for pixel data corresponding to m rows of pixel data in a display module 1 ～β m Is P 1 ～P m The corresponding coefficients.
In addition, it is considered that human eyes have different sensitivities to brightness differences under different brightness, and a terminal product has a requirement for brightness adjustment when in application, so that the current brightness of a display module displaying the compensated current row pixel data can be used as one of factors related to line crosstalk generated when the current row pixel data is displayed to participate in compensation coefficient operation, the current brightness is marked as DBV, a corresponding coefficient is marked as DBV _ coeff, and at this time, a compensation coefficient K = a × β × DBV _ coeff. The current luminance coefficient lookup table of the display module is shown in table 4.
TABLE 4
| Current brightness of display module (DBV) | DBV coefficient (DBV _ coeff) |
| DBV 1 | DBV_coeff 1 |
| DBV 2 | DBV_coeff 2 |
| …… | …… |
| DBV m-1 | DBV_coeff m-1 |
| DBV m | DBV_coeff m |
DBV in Table 4 1 ～DBV m DBV _ coeff is the m display brightness of the display module 1 ～DBV_coeff m Is a DBV 1 ～DBV m The coefficient of (a).
Considering that a pixel includes a plurality of sub-pixels, for example, a pixel includes R, G, and B sub-pixels, and the corresponding gray levels of the sub-pixels may cause visual difference under the same variation, each sub-pixel may be used as one of the factors related to the line crosstalk occurring when the pixel data of the current row is displayed, the coefficients corresponding to the R, G, and B sub-pixels are denoted as R _ coeff, G _ coeff, and B _ coeff, and the corresponding compensation coefficient of a sub-pixel is K = a × β × DBV _ coeff × (R/G/B) _ coeff. Please refer to table 5, which is a lookup table of sub-pixel coefficients according to an embodiment of the present invention.
TABLE 5
| Sub-pixel type | Sub-pixel coefficient |
| R | R_coeff |
| G | G_coeff |
| B | B_coeff |
It should be understood that, when the basic unit of calculation is a sub-pixel, the current pixel row data and the next pixel row data described in the present invention are data for the same sub-pixel in the same row of pixels, respectively. For example, the processing method adopted by the current row pixel data of the R sub-pixels in the current row and the next row pixel data of the R sub-pixels in the next row is the same as the type of the method in fig. 4, and therefore, the description thereof is omitted.
In order to increase the operation speed, a lookup circuit may be used to store the above tables 1 to 5 and find out the currently required coefficients therefrom.
In addition, considering that the Line cross talk phenomenon may affect not only the pixel data of the current Line 1 but also the i lines following the pixel data of the current Line, the Line coefficient representing the influence range of the Line cross talk may be regarded as Line _ coeff to participate in the calculation of the compensation coefficient, specifically as follows:
and performing product operation on the coefficients of all the factors and the line coefficients representing the influence spread range of the line crosstalk to obtain a compensation coefficient.
Please refer to table 6 for a row coefficient lookup table according to an embodiment of the present invention.
TABLE 6
In Table 6, when the average gray level difference is negative, the line coefficients corresponding to the i-1 th line from the current line to the current line are sequentially L 1 _N～L i N; when the average gray level difference is positive, the line coefficients corresponding to the i-1 th line from the current line to the line behind the current line are L in sequence 1 _P～L i _P。
If the factors related to the Line crosstalk generated when the pixel data in the current row is displayed include the initial gray scale, the total amount of transitions, the current brightness of the display module displaying the compensated pixel data in the current row, and the sub-pixel data, the compensation coefficient = a × β × DBV _ coeff × (R/G/B) _ coeff × Line _ coeff.
After the product of the compensation gray scale and the compensation coefficient of the pixel data of the current row is taken as the first compensation coefficient, step 304 can be executed.
Step 304: and compensating the pixel data of the current line by using the first compensation gray scale to obtain the compensated pixel data of the current line.
The compensated current row pixel data = current row pixel data + the first compensation gray scale. Therefore, the display module can send the compensated pixel data of the current Line to the corresponding Line for displaying, thereby effectively improving the Line cross phenomenon.
In order to increase the operation speed, the steps 303 to 304 can be implemented by corresponding operation circuits. The arithmetic circuit comprises the lookup circuit and the multiplier. Fig. 5 is a schematic structural diagram of a display data compensation circuit according to an embodiment of the present invention.
In fig. 5, the row data buffer is divided into a current row data buffer and a next row data buffer for easy distinction, the comparison circuit is illustrated as a subtracter (of course, some other operation devices, such as an adder, a divider, etc., are included therein), and the row coefficient lookup table in fig. 5 is a part of the lookup circuit.
In the embodiment provided by the invention, the pixel data of the current line to be displayed in the image to be displayed and the pixel data of the next line of the pixel data of the current line are obtained; comparing the difference between the pixel data of the current row and the pixel data of the next row, and acquiring the initial gray scale of the pixel data of the current row, the total amount of the gray scale jump of the pixel data in the pixel data of the current row, and the average gray scale difference between all the pixel data of the gray scale jump of the pixel data in the pixel data of the current row and the corresponding pixel data in the pixel data of the next row from the comparison result, thereby quickly determining the key factor of the row where the pixel data causing the line crosstalk exists; determining a first compensation gray scale for gray scale compensation of pixels of the current row based on key factors, such as the initial gray scale, the average gray scale difference and the jump number, corresponding to the row where the pixel data causing the linear crosstalk is located; the pixel data of the current row are compensated by the first compensation gray scale, the compensated pixel data of the current row are obtained, so that the phenomenon of line crosstalk of the display module can be effectively improved, the phenomenon of line crosstalk of the display module with high resolution and high refresh rate can be improved, and the display effect of the display module with high resolution and high refresh rate is improved.
Based on the same inventive concept, an embodiment of the present invention provides a circuit for compensating display data, where the detailed implementation of the method for compensating display data of the circuit can be referred to the description of the embodiment of the method, and repeated descriptions thereof are omitted, and referring to fig. 6, the circuit includes:
a line data buffer 61, configured to store a current line of pixel data to be displayed in an image to be displayed and a next line of pixel data of the current line of pixel data;
a comparison circuit 62, configured to compare differences between the pixel data in the current row and the pixel data in the next row, and obtain, from a comparison result, a starting gray scale of the pixel data in the current row, a total amount of gray scale transitions of the pixel data in the current row, and an average gray scale difference between all pixel data in the current row with corresponding pixel data in the next row; the initial gray scale is the average gray scale value of pixel data with jumping gray scale in the pixel data of the current line;
an arithmetic circuit 63, configured to determine a first compensation gray scale for performing gray scale compensation on the current row pixel based on the initial gray scale, the average gray scale difference, and the transition number; and compensating the pixel data of the current line by using the first compensation gray scale to obtain the compensated pixel data of the current line.
In one possible implementation, the comparison circuit 62 is further configured to:
determining pixel data with gray scale jump from the pixel data of the current line, and counting the corresponding jump total amount;
calculating the average gray scale value of the pixel data with gray scale jump in the pixel data of the current line to obtain the initial gray scale;
calculating the average gray scale value of pixel data corresponding to the pixel data with gray scale jump in the pixel data of the current row in the pixels of the next row to obtain a termination gray scale;
and performing difference operation on the initial gray scale and the termination gray scale to obtain the average gray scale difference.
In one possible implementation, the comparison circuit 62 is further configured to:
comparing each pixel data in the pixel data of the current row with the pixel data corresponding to the same column in the pixel data of the next row;
and if the two pixel data in the same column in the pixel data of the current row and the pixel data of the next row are the same, determining that the gray scale jump does not occur to the corresponding pixel data in the pixel data of the current row, otherwise, determining that the gray scale jump occurs to the corresponding pixel data in the pixel data of the current row.
Referring to fig. 7, a schematic structural diagram of another display data compensation circuit according to an embodiment of the present invention is shown, where the operation circuit 63 in the display data compensation circuit includes:
a lookup circuit 631, configured to obtain a second compensation gray scale corresponding to the average gray scale difference from a preset compensation gray scale lookup table; the preset compensation gray scale lookup table is used for recording second compensation gray scales corresponding to different average gray scale differences; determining a compensation coefficient corresponding to the second compensation gray scale based on a factor related to line crosstalk generated when the pixel data of the current row is displayed;
the multiplier 632 is configured to perform a product operation on the second compensation gray scale and the compensation coefficient to obtain the first compensation gray scale.
In one possible implementation, the lookup circuit 631 is further configured to:
acquiring a coefficient lookup table corresponding to each factor, and acquiring the coefficient of the corresponding factor from the coefficient lookup table;
and performing product operation on the coefficients of all the factors to obtain the compensation coefficient.
In one possible implementation, the search circuit 631 is further configured to:
and performing product operation on the coefficients of all the factors and the row coefficients representing the influence range of the line crosstalk to obtain the compensation coefficients.
In one possible embodiment, the factor includes:
the initial gray scale, the total jump amount and the current brightness of a display module for displaying the compensated pixel data of the current line.
Based on the same inventive concept, an embodiment of the present invention provides a display apparatus including the circuit for display data compensation as described above.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the invention may take the form of a computer program product embodied on one or more readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer/processor-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These program instructions may also be stored in a readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer/processor implemented process such that the instructions which execute on the computer/processor or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method of display data compensation, comprising:
acquiring current row pixel data to be displayed in an image to be displayed and next row pixel data of the current row pixel data;
comparing the difference between the pixel data of the current row and the pixel data of the next row, and acquiring the initial gray scale of the pixel data of the current row, the total amount of the pixel data in the pixel data of the current row subjected to gray scale jump, and the average gray scale difference between all the pixel data in the pixel data of the current row subjected to gray scale jump and the corresponding pixel data in the pixel data of the next row from the comparison result; the initial gray scale is the average gray scale value of pixel data with jumping gray scale in the pixel data of the current line;
determining a first compensation gray scale for gray scale compensation of the current row pixels based on the initial gray scale, the average gray scale difference and the jump number;
and compensating the pixel data of the current line by using the first compensation gray scale to obtain the compensated pixel data of the current line.
2. The method as claimed in claim 1, wherein obtaining the initial gray level of the pixel data of the current row, the total amount of the transition of the gray level transition of the pixel data of the current row, and the average gray level difference between all the pixel data of the current row having the gray level transition and the corresponding pixel data of the next row from the comparison result comprises:
determining pixel data with gray scale jump from the pixel data of the current line, and counting the corresponding jump total amount;
calculating the average gray scale value of the pixel data with gray scale jump in the pixel data of the current line to obtain the initial gray scale;
calculating the average gray scale value of pixel data corresponding to the pixel data with gray scale jump in the pixel data of the current row in the pixels of the next row to obtain a termination gray scale;
and performing difference operation on the starting gray scale and the ending gray scale to obtain the average gray scale difference.
3. The method of claim 2, wherein determining pixel data at which a gray level transition occurs from the pixel data of the current row comprises:
comparing each pixel data in the pixel data of the current row with the pixel data corresponding to the same column in the pixel data of the next row;
and if the two pixel data in the same column in the pixel data of the current row and the pixel data of the next row are the same, determining that no gray scale jump occurs in the corresponding pixel data in the pixel data of the current row, otherwise, determining that the gray scale jump occurs in the corresponding pixel data in the pixel data of the current row.
4. The method of any of claims 1-3, wherein determining a first compensated gray level for gray level compensation of the current row of pixels based on the start gray level, the average gray level difference, and the transition number comprises:
acquiring a second compensation gray scale corresponding to the average gray scale difference from a preset compensation gray scale lookup table; the preset compensation gray scale lookup table is used for recording second compensation gray scales corresponding to different average gray scale differences;
determining a compensation coefficient corresponding to the second compensation gray scale based on a factor related to line crosstalk generated when the pixel data of the current row is displayed;
and performing product operation on the second compensation gray scale and the compensation coefficient to obtain the first compensation gray scale.
5. The method of claim 4, wherein determining the compensation factor corresponding to the second compensation gray scale based on a factor related to line crosstalk occurring while the current row of pixel data is displayed comprises:
acquiring a coefficient lookup table corresponding to each factor, and acquiring the coefficient of the corresponding factor from the coefficient lookup table;
and performing product operation on the coefficients of all the factors to obtain the compensation coefficient.
6. The method of claim 5, wherein multiplying the coefficients of all the factors to obtain the compensation coefficient comprises:
and performing product operation on the coefficients of all the factors and the row coefficients representing the influence range of the line crosstalk to obtain the compensation coefficients.
7. The method of claim 4, wherein the factor comprises:
the initial gray scale, the total jump amount and the current brightness of a display module for displaying the compensated pixel data of the current line.
8. A circuit for display data compensation, comprising:
the line data buffer is used for storing the pixel data of a current line to be displayed in the image to be displayed and the pixel data of a line next to the pixel data of the current line;
the comparison circuit is used for comparing the difference between the pixel data of the current row and the pixel data of the next row, and acquiring the initial gray scale of the pixel data of the current row, the total amount of gray scale jump of the pixel data in the pixel data of the current row, and the average gray scale difference between all the pixel data of the current row subjected to gray scale jump and the corresponding pixel data in the pixel data of the next row from the comparison result; the initial gray scale is the average gray scale value of pixel data with jumping gray scale in the pixel data of the current line;
the operation circuit is used for determining a first compensation gray scale for gray scale compensation of the pixels on the current line based on the initial gray scale, the average gray scale difference and the jump number; and compensating the pixel data of the current line by using the first compensation gray scale to obtain the compensated pixel data of the current line.
9. The circuit of claim 8, wherein the arithmetic circuit comprises:
the search circuit is used for acquiring a second compensation gray scale corresponding to the average gray scale difference from a preset compensation gray scale search table; the preset compensation gray scale lookup table is used for recording second compensation gray scales corresponding to different average gray scale differences; determining a compensation coefficient corresponding to the second compensation gray scale based on a factor related to line crosstalk generated when the pixel data of the current row is displayed;
and the multiplier is used for carrying out product operation on the second compensation gray scale and the compensation coefficient to obtain the first compensation gray scale.
10. A display device comprising a circuit for display data compensation as claimed in claim 8 or 9.
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| CN116682378B (en) * | 2023-05-09 | 2024-05-03 | 苇创微电子(上海)有限公司 | Method, system and device for compensating display crosstalk |
| CN117912423A (en) * | 2024-03-08 | 2024-04-19 | 禹创半导体(深圳)有限公司 | Method, device, equipment and storage medium for compensating crosstalk interference of display panel |
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