CN109308868B - Display panel driving method and system and display device - Google Patents
Display panel driving method and system and display device Download PDFInfo
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- CN109308868B CN109308868B CN201811550745.XA CN201811550745A CN109308868B CN 109308868 B CN109308868 B CN 109308868B CN 201811550745 A CN201811550745 A CN 201811550745A CN 109308868 B CN109308868 B CN 109308868B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
Abstract
The application belongs to the technical field of display and provides a driving method, a system and a display device of a display panel, wherein the driving method comprises the following steps: performing viewing angle compensation on first driving data for driving the display panel through a viewing angle compensation algorithm to obtain second driving data; performing white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data; performing response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data; and carrying out error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data so as to drive the display panel to display. The display panel can reasonably match various algorithms in the screen driving board, reduces errors of visual angle compensation algorithms, and effectively improves the display effect of the display panel under a large visual angle.
Description
Technical Field
The embodiment of the application belongs to the technical field of display, and particularly relates to a driving method and system of a display panel and a display device.
Background
With the development of display technology, display devices such as liquid crystal panels and displays are becoming thinner, larger in screen size, lower in power consumption and lower in cost. The image quality is an important display index of the display panel, and the chromaticity visual angle is an important index for measuring the image quality of a wide-angle (VA type) panel. The contrast of the display panel, especially the wide-viewing angle display panel, is significantly reduced under a large viewing angle, resulting in a white display and a poor display effect. The visual angle compensation technology is utilized to carry out visual angle compensation on the display panel, so that the display effect of the display panel under a large visual angle can be effectively improved.
However, the conventional viewing angle compensation algorithm is difficult to be reasonably matched with other algorithms in a screen drive board (TCON) of a display device, so that errors of the viewing angle compensation algorithms become large, even signal errors occur, and the display effect of the display panel under a large viewing angle cannot be effectively improved.
Disclosure of Invention
The embodiment of the application provides a driving method and system of a display panel and a display device, and aims to solve the problems that an existing visual angle compensation algorithm is difficult to reasonably match with other algorithms in a screen driving board of the display device, so that errors of the visual angle compensation algorithms become large, even signal errors occur, and the display effect of the display panel under a large visual angle cannot be effectively improved.
An embodiment of the present application provides a driving method of a display panel, including:
performing viewing angle compensation on first driving data for driving the display panel through a viewing angle compensation algorithm to obtain second driving data;
performing white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data;
performing response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data;
and carrying out error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data so as to drive the display panel to display.
In one embodiment, before performing the viewing angle compensation on the first driving data for driving the display panel by the viewing angle compensation algorithm to obtain the second driving data, the method includes:
measuring tristimulus values of red, green and blue displayed on all gray scales of the display panel;
improving the accuracy of displaying the tristimulus values of the preset colors of all gray scales to a preset digit by a linear interpolation method;
converting the tristimulus values of red, green and blue displayed on each gray scale of the display panel into a target brightness value, a first target chromatic value and a second target chromatic value of each white gray scale;
and searching and storing target tristimulus values meeting the conditions of the target brightness value, the first target chromatic value and the second target chromatic value from a preset tristimulus value lookup table through a minimum error method.
In one embodiment, the calculation formula for converting the tristimulus values of red, green and blue displayed by the display panel at each gray scale into the target luminance value, the first target chromaticity value and the second target chromaticity value at each white gray scale is as follows:
Y_R+Y_G+Y_B＝Gamma 2.2；
Wx＝X/(X+Y+Z)；
Wy＝Y/(X+Y+Z)；
wherein, Y _ R is a red luminance factor, Y _ G is a green luminance factor, Y _ B is a blue luminance factor, Gamma2.2 is a target luminance value, Wx is a first target chromaticity value, Wy is a second target chromaticity value, X is a red primary color stimulus amount, Y is a green primary color stimulus amount, and Z is a blue primary color stimulus amount.
In one embodiment, the white balance adjusting the second driving data by a white balance algorithm to obtain third driving data includes:
and carrying out white balance adjustment on the second driving data according to the target tristimulus value to obtain third driving data.
In one embodiment, the preset number ranges from 10 bits to 12 bits.
In one embodiment, the performing the viewing angle compensation on the first driving data for driving the display panel through the viewing angle compensation algorithm to obtain the second driving data includes:
establishing a first brightness gamma lookup table of the high-voltage sub-pixel;
establishing a second brightness gamma lookup table of the low-voltage sub-pixel;
when first driving data used for driving the display panel is received, performing visual angle compensation on the first driving data according to the first brightness gamma lookup table and the second brightness gamma lookup table to obtain second driving data.
In one embodiment, the formula for establishing the first brightness gamma lookup table and the second brightness gamma lookup table is:
Gamma_H(0°)+Gamma_L(0°)＝2*Gamma2.2(0°)；
gamma value Min (Gamma _ H (θ) + Gamma _ L (θ) -2 × Gamma2.2(0 °));
wherein, Gamma _ H is a brightness Gamma curve of the high voltage sub-pixel, Gamma _ L is a brightness Gamma curve of the low voltage sub-pixel, and θ is a viewing angle when a human eye views the display panel.
In one embodiment, the performing the viewing angle compensation on the first driving data according to the first brightness gamma lookup table and the second brightness gamma lookup table comprises:
adjusting the voltage of a driving signal corresponding to a main sub-pixel in the first driving data to a high voltage according to the first brightness gamma lookup table;
and adjusting the voltage of the driving signal corresponding to the secondary sub-pixel in the first driving data to be a low voltage according to the second brightness gamma lookup table.
Another embodiment of the present application provides a driving system of a display panel, including:
the visual angle compensation module is used for carrying out visual angle compensation on first driving data used for driving the display panel through a visual angle compensation algorithm to obtain second driving data;
the white balance module is used for carrying out white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data;
the response time compensation module is used for performing response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data;
and the error diffusion module is used for carrying out error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data so as to drive the display panel to display.
Yet another embodiment of the present application provides a display device, including a memory, a screen driving board, and a computer program stored in the memory and operable on the screen driving board, wherein the display device further includes a display panel, and the steps of the method are implemented when the computer program is executed by the screen driving board.
Yet another embodiment of the present application provides a computer-readable storage medium storing a computer program, which when executed by a screen driver board implements the steps of the above method.
According to the embodiment of the application, visual angle compensation is sequentially performed on first driving data used for driving a display panel through a visual angle compensation algorithm to obtain second driving data, white balance adjustment is performed on the second driving data through a white balance algorithm to obtain third driving data, response time compensation is performed on the third driving data through a response time compensation algorithm to obtain fourth driving data, error diffusion processing is performed on the fourth driving data through a dithering algorithm to obtain fifth driving data, the fifth driving data are displayed by driving the display panel, reasonable matching of various algorithms in a screen driving plate is achieved, errors of the visual angle compensation algorithm are reduced, and the display effect of the display panel under a large visual angle is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 2 is a schematic flowchart illustrating a driving method of a display panel according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a driving method of a display panel according to another embodiment of the present disclosure;
FIG. 4 is a diagram of a look-up table of preset tristimulus values according to another embodiment of the present application;
fig. 5 is a schematic flowchart of a driving method of a display panel according to another embodiment of the present disclosure;
FIG. 6 is a diagram of a first luminance gamma lookup table according to yet another embodiment of the present application;
FIG. 7 is a diagram of a second luminance gamma lookup table according to another embodiment of the present application;
FIG. 8 is a schematic view of a perspective provided by yet another embodiment of the present application;
fig. 9 is a schematic structural diagram of a driving system of a display panel according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
As shown in fig. 1, the present embodiment provides a display panel 1, which includes a pixel array, in which a sub-pixel of each pixel in the pixel array is divided into a main-sub-pixel (main-pixel) and a sub-pixel (sub-pixel), an adjacent sub-pixel of any one of the main sub-pixels is a sub-pixel, and an adjacent sub-pixel of any one of the sub-pixels is a main sub-pixel.
In application, each pixel at least includes three sub-pixels of three colors of red, green and blue, and may also include a fourth sub-pixel, the color of the fourth sub-pixel may be white or yellow, and any sub-pixel in each pixel may be set as a main sub-pixel or a sub-pixel according to actual needs.
Fig. 1 exemplarily shows a pixel array composed of 4 × 6 sub-pixels, wherein colors of sub-pixels of 1 st to 6 th columns are red, green, blue, red, green, and blue, respectively. In application, other arrangement modes can be set according to actual needs. It is sufficient to ensure that the primary and secondary attributes of adjacent sub-pixels are different.
In application, the display panel includes a pixel array composed of a plurality of rows and a plurality of columns of sub-pixels, the row sub-pixels are connected with the source driving module, the column sub-pixels are connected with the gate driving module, and the number of rows and columns of the pixel array can be set according to requirements.
In the present embodiment, the main sub-pixel is a sub-pixel driven by a high voltage driving signal, which is defined as a high voltage sub-pixel (high voltage pixel) in the present embodiment, and the sub-pixel is a sub-pixel driven by a low voltage driving signal, which is defined as a low voltage sub-pixel (low voltage pixel) in the present embodiment.
In application, the high voltage is a voltage higher than the voltage required for normal display of the main sub-pixel, and the low voltage is a voltage lower than the voltage required for normal display of the main sub-pixel.
As shown in fig. 2, an embodiment of the present application provides a driving method of a display panel, for driving the display panel in the embodiment corresponding to fig. 1, where the driving method may be performed by a panel driving board, and the driving method includes:
step S201, performing viewing angle compensation on the first driving data for driving the display panel through a viewing angle compensation algorithm to obtain second driving data.
In application, the first driving Data is driving Data (Data) output by the Source driving module for performing Data driving on pixels of the display panel, and the Source driving module may be any device or circuit having a function of performing Data driving on pixels of the display panel, for example, a Source Driver IC (Source Driver IC) or a thin-Film Source Driver Chip (S-COF, Source-Chip on Film) or the like.
In application, the principle of the viewing angle compensation algorithm may be that the main sub-pixel is driven by a voltage higher than the voltage required for normal display of the main sub-pixel, and the sub-pixel is driven by a voltage lower than the voltage required for normal display of the main sub-pixel.
And S202, carrying out white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data.
In application, the principle of the white balance algorithm may be to adjust the magnitude of the stimulus of the three primary colors for displaying red, green and blue colors for each gray scale of the display panel.
And S203, performing response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data.
In application, the response time compensation algorithm may select any response time compensation algorithm according to actual needs, for example, a manner of driving the display panel in a partitioning manner may be selected to increase the response speed.
Step S204, performing error diffusion processing on the fourth driving data through a dithering (dithering) algorithm to obtain fifth driving data, so as to drive the display panel to display.
In application, the dithering algorithm can select any dithering algorithm according to actual needs, and the dithering algorithm is divided into a random dithering algorithm and an ordered dithering algorithm, the random dithering algorithm randomly generates a group of template square array arrays, the generation period of the random number is between the minimum gray scale and the maximum gray scale of an image, the ordered dithering algorithm artificially sets some template values to perform matching operation, and the random dithering algorithm mainly comprises two types, namely a dispersion type dithering algorithm (e.g. Bayer ordered dithering algorithm) and a cluster type discrete algorithm (e.g. cluster) which are different from each other. On the basis of the above two algorithms, a dithering algorithm for locally aggregating the whole dispersion is proposed, for example, the Floyd-Steinberg dithering algorithm.
The embodiment sequentially performs visual angle compensation on first driving data used for driving a display panel through a visual angle compensation algorithm to obtain second driving data, performs white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data, performs response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data, performs error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data to drive the display panel to display, achieves reasonable matching of various algorithms in a screen driving board, reduces errors of the visual angle compensation algorithm, and effectively improves the display effect of the display panel under a large visual angle.
As shown in fig. 3, in another embodiment of the present application, step S202 is preceded by:
step S301, measuring tristimulus values of red, green and blue displayed on all gray scales of the display panel.
In application, the tristimulus values are based on the CIE 1931XYZ Color Space (CIE XYZ Color Space) standard proposed by the International Commission on Illumination (CIE). The CIE 1931XYZ color space takes the three colors red, green and blue as the three primary colors of the color space, and all other colors can be formed by mixing the three primary colors. The CIE 1931XYZ color space is often represented by the CIE 1931Chromaticity Diagram (CIE 1931Chromaticity Diagram), in which there are three XYZ parameters, where stimulus value Y represents luminance.
In application, all gray scales of the display panel include each gray scale of 0-255.
Step S302, the precision of displaying the tristimulus values of the preset colors of all gray scales is improved to a preset digit through a linear interpolation method.
In one embodiment, the preset number ranges from 10 bits to 12 bits.
In application, the preset number of bits can be set according to the actual requirement of the accuracy of the tristimulus value, for example, 10bit, 11bit or 12bit can be set.
Step S303, converting the tristimulus values of red, green and blue displayed on each gray scale of the display panel into a target brightness value, a first target colorimetric value and a second target colorimetric value of each white gray scale.
In application, the target brightness value may be set to a brightness value corresponding to any white gray scale according to actual needs, for example, gamma 2.2. The first target colorimetric values and the second target colorimetric values may be set to be any constant values according to actual needs. The target brightness value is the brightness value expected to be reached by the display panel when the display panel displays a white gray scale; similarly, the target chromaticity value is the chromaticity value expected to be reached by the display panel when the display panel displays a white gray scale.
Step S304, searching and storing a target tristimulus value meeting the conditions of the target brightness value, the first target chromatic value and the second target chromatic value from a preset tristimulus value lookup table by a minimum error method.
In application, the preset tristimulus value lookup table is a lookup table which is set in advance according to actual needs and used for looking up the red primary color stimulus quantity, the green primary color stimulus quantity and the blue primary color stimulus quantity corresponding to each gray scale. The preset tristimulus value lookup table may be implemented by a look-up table (LUT), or may be implemented by other data tables or Random Access Memory (RAM) storage media having input data with the same function as the display lookup table, that is, input data corresponding to the lookup table is looked up according to the input data. The target tristimulus value is a tristimulus value which accords with the conditions of the target brightness value, the first target chromatic value and the second target chromatic value when the display panel displays a white gray scale.
As shown in fig. 4, a preset tristimulus value lookup table corresponding to gray scales of 0 to 255 is exemplarily shown; wherein, the numerical value of the R-LUT column is the red primary color stimulus quantity, the numerical value of the G-LUT column is the green primary color stimulus quantity, and the numerical value of the B-LUT column is the blue primary color stimulus quantity.
In one embodiment, the calculation formula of step S302 is:
Y_R+Y_G+Y_B＝Gamma 2.2；
Wx＝X/(X+Y+Z)；
Wy＝Y/(X+Y+Z)；
wherein, Y _ R is a red luminance factor, Y _ G is a green luminance factor, Y _ B is a blue luminance factor, Gamma2.2 is a target luminance value, Wx is a first target chromaticity value, Wy is a second target chromaticity value, X is a red primary color stimulus amount, Y is a green primary color stimulus amount, and Z is a blue primary color stimulus amount.
In one embodiment, step S202 includes:
and carrying out white balance adjustment on the second driving data according to the target tristimulus value to obtain third driving data.
In application, after the visual angle compensation is carried out, the white balance adjustment can be carried out on the second driving data according to the stored target tristimulus values to obtain third driving data.
As shown in fig. 5, in another embodiment of the present application, step S201 includes:
step S501, establishing a first brightness gamma lookup table of the high-voltage sub-pixels;
step S502, establishing a second brightness gamma lookup table of the low-voltage sub-pixels;
step S503, when first driving data for driving the display panel is received, performing viewing angle compensation on the first driving data according to the first brightness gamma lookup table and the second brightness gamma lookup table to obtain second driving data.
In one embodiment, the formula for establishing the first brightness gamma lookup table and the second brightness gamma lookup table in steps S501 and S502 is as follows:
Gamma_H(0°)+Gamma_L(0°)＝2*Gamma2.2(0°)；
gamma value Min (Gamma _ H (θ) + Gamma _ L (θ) -2 × Gamma2.2(0 °));
wherein, Gamma _ H is a brightness Gamma curve of the high voltage sub-pixel, Gamma _ L is a brightness Gamma curve of the low voltage sub-pixel, and θ is a viewing angle when a human eye views the display panel.
In this embodiment, the gamma value is used to reflect the relationship between the input value of the display panel and the brightness output by the display panel, and the input value of the display panel can be known according to the gamma value and the brightness expected to be achieved by the display panel. The input value of the display panel at a certain brightness is the tristimulus value of the display panel displaying red, green and blue at the brightness. The brightness level may be represented by gray scale.
As shown in fig. 6, a first luminance gamma lookup table is exemplarily shown. The first brightness gamma lookup table is a lookup table used for looking up the corresponding tristimulus values of the high-voltage sub-pixels under each gray scale according to the gamma values; FIG. 6 is a table showing exemplary tristimulus values look-up for high voltage sub-pixels corresponding to gray levels of 0-255; wherein, the numerical value of the R-LUT column is the red primary color stimulus quantity, the numerical value of the G-LUT column is the green primary color stimulus quantity, and the numerical value of the B-LUT column is the blue primary color stimulus quantity. As shown in fig. 7, a second luminance gamma lookup table is exemplarily shown. The second brightness gamma lookup table is a lookup table used for looking up the corresponding tristimulus values of the low-voltage sub-pixels under each gray scale according to the gamma values; FIG. 7 is a table showing exemplary tristimulus values look-up for high voltage sub-pixels corresponding to gray levels of 0-255; wherein, the numerical value of the R-LUT column is the red primary color stimulus quantity, the numerical value of the G-LUT column is the green primary color stimulus quantity, and the numerical value of the B-LUT column is the blue primary color stimulus quantity.
As shown in fig. 8, an angle θ between the direction of the line of sight of the human eye (dotted line) and the vertical direction of the display panel 1 (straight line), i.e., a viewing angle, is exemplarily shown.
In application, the viewing angle has a value range of [0 °, 90 ° ].
In one embodiment, step S201 includes:
adjusting the voltage of a driving signal corresponding to a main sub-pixel in the first driving data to a high voltage according to the first brightness gamma lookup table;
and adjusting the voltage of the driving signal corresponding to the secondary sub-pixel in the first driving data to be a low voltage according to the second brightness gamma lookup table. In application, the first brightness gamma lookup table or the second brightness gamma lookup table may be implemented by a look-up table (LUT), or may be implemented by other data tables or Random Access Memory (RAM) type storage media having input data with the same function as the display lookup table, that is, input data corresponding to the input data is searched for.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
As shown in fig. 9, an embodiment of the present application provides a control system 9 of a display panel, which may be a software system in a screen driving board, for executing the driving method.
The control system 9 includes:
a viewing angle compensation module 91, configured to perform viewing angle compensation on first driving data used for driving the display panel through a viewing angle compensation algorithm to obtain second driving data;
a white balance module 92, configured to perform white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data;
the response time compensation module 93 is configured to perform response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data;
and an error diffusion module 94, configured to perform error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data, so as to drive the display panel to display.
In one embodiment, the control system 9 further comprises:
the tristimulus values measuring module is used for measuring tristimulus values of red, green and blue displayed by the display panel at all gray scales;
the accuracy promotion module is used for promoting the accuracy of the tristimulus values of all gray scales for displaying the preset colors to a preset digit through a linear interpolation method;
the conversion module is used for converting the tristimulus values of red, green and blue displayed on each gray scale of the display panel into a target brightness value, a first target chromatic value and a second target chromatic value of each white gray scale;
and the searching module is used for searching and storing the target tristimulus values meeting the conditions of the target brightness value, the first target chromatic value and the second target chromatic value from a preset tristimulus value searching table through a minimum error method.
In application, each module in the control system of the display panel is a software program module, and can also be realized by an independent processor, or be integrated together into the same processor. The Processor 80 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The processor may also be a screen driver board.
The embodiment sequentially performs visual angle compensation on first driving data used for driving a display panel through a visual angle compensation algorithm to obtain second driving data, performs white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data, performs response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data, performs error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data to drive the display panel to display, achieves reasonable matching of various algorithms in a screen driving board, reduces errors of the visual angle compensation algorithm, and effectively improves the display effect of the display panel under a large visual angle.
As shown in fig. 10, the present embodiment provides a display device 10, which includes: a display panel 1, a screen driving board 100, a memory 101, and a computer program 102, such as an image control program, stored in the memory 101 and executable on the screen driving board 100. The screen driving board 100 implements the steps in the above-described embodiment of the image control method, such as steps S201 to S204 shown in fig. 2, when executing the computer program 102. Alternatively, the screen driving board 100 implements the functions of the modules in the above-described device embodiments, for example, the functions of the modules 91 to 94 shown in fig. 9, when executing the computer program 102.
Illustratively, the computer program 102 may be partitioned into one or more modules that are stored in the memory 101 and executed by the screen driver board 100 to complete the present application. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 102 in the display device 10. For example, the computer program 102 may be partitioned into a view angle compensation module, a white balance module, a response time compensation module, and an error diffusion module, each functioning as follows:
the visual angle compensation module is used for carrying out visual angle compensation on first driving data used for driving the display panel through a visual angle compensation algorithm to obtain second driving data;
the white balance module is used for carrying out white balance adjustment on the second driving data through a white balance algorithm to obtain third driving data;
the response time compensation module is used for performing response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data;
and the error diffusion module is used for carrying out error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data so as to drive the display panel to display.
The display device may include, but is not limited to, the display panel 1, the screen driving board 100, and the memory 101. Those skilled in the art will appreciate that fig. 10 is merely an example of the display apparatus 10, and does not constitute a limitation of the display apparatus 10, and may include more or less components than those shown, or combine some of the components, or different components, for example, the display apparatus may further include an input-output device, a network access device, a bus, etc.
The memory 101 may be an internal storage unit of the display device 10, such as a hard disk or a memory of the display device 10. The memory 101 may also be an external storage device of the display apparatus 10, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the display apparatus 10. Further, the memory 101 may also include both an internal storage unit and an external storage device of the display apparatus 10. The memory 101 is used for storing the computer program and other programs and data required by the display device. The memory 101 may also be used to temporarily store data that has been output or is to be output.
In one embodiment, the Display device 201 may be any type of Display device, such as a Liquid Crystal Display device based on LCD (Liquid Crystal Display) technology, an Organic electroluminescent Display device based on OLED (Organic electroluminescent Display) technology, a Quantum Dot Light Emitting diode Display device based on QLED (Quantum Dot Light Emitting Diodes) technology, a curved Display device, or the like.
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 a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. A method of driving a display panel, comprising:
performing viewing angle compensation on first driving data for driving the display panel through a viewing angle compensation algorithm to obtain second driving data;
performing white balance adjustment on the second driving data according to a target tristimulus value to obtain third driving data;
performing response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data;
performing error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data so as to drive the display panel to display;
the method for performing viewing angle compensation on first driving data for driving a display panel through a viewing angle compensation algorithm comprises the following steps before second driving data are obtained:
measuring tristimulus values of red, green and blue displayed on all gray scales of the display panel;
improving the accuracy of displaying the tristimulus values of the preset colors of all gray scales to a preset digit by a linear interpolation method;
converting the tristimulus values of red, green and blue displayed on each gray scale of the display panel into a target brightness value, a first target chromatic value and a second target chromatic value of each white gray scale;
searching and storing target tristimulus values meeting the conditions of the target brightness value, the first target chromatic value and the second target chromatic value from a preset tristimulus value lookup table through a minimum error method;
the calculation formula for converting the tristimulus values of red, green and blue displayed on each gray scale of the display panel into the target brightness value, the first target colorimetric value and the second target colorimetric value of each white gray scale is as follows:
Y_R+Y_G+Y_B＝Gamma 2.2；
Wx＝X/(X+Y+Z)；
Wy＝Y/(X+Y+Z)；
wherein, Y _ R is a red luminance factor, Y _ G is a green luminance factor, Y _ B is a blue luminance factor, Gamma2.2 is a target luminance value, Wx is a first target chromaticity value, Wy is a second target chromaticity value, X is a red primary color stimulus amount, Y is a green primary color stimulus amount, and Z is a blue primary color stimulus amount.
2. The method of claim 1, wherein the predetermined number of bits ranges from 10 bits to 12 bits.
3. The method of driving a display panel according to claim 1, wherein the performing the viewing angle compensation on the first driving data for driving the display panel by the viewing angle compensation algorithm to obtain the second driving data comprises:
establishing a first brightness gamma lookup table of the high-voltage sub-pixel;
establishing a second brightness gamma lookup table of the low-voltage sub-pixel;
when first driving data used for driving the display panel is received, performing visual angle compensation on the first driving data according to the first brightness gamma lookup table and the second brightness gamma lookup table to obtain second driving data.
4. The method of claim 3, wherein the formula for establishing the first brightness gamma lookup table and the second brightness gamma lookup table is as follows:
Gamma_H(0°)+Gamma_L(0°)＝2*Gamma2.2(0°)；
gamma value Min (Gamma _ H (θ) + Gamma _ L (θ) -2 × Gamma2.2(0 °));
wherein, Gamma _ H is a brightness Gamma curve of the high voltage sub-pixel, Gamma _ L is a brightness Gamma curve of the low voltage sub-pixel, and θ is a viewing angle when a human eye views the display panel.
5. The method of driving a display panel according to claim 3, wherein the performing the viewing angle compensation on the first driving data according to the first luminance gamma lookup table and the second luminance gamma lookup table comprises:
adjusting the voltage of a driving signal corresponding to a main sub-pixel in the first driving data to a high voltage according to the first brightness gamma lookup table;
and adjusting the voltage of the driving signal corresponding to the secondary sub-pixel in the first driving data to be a low voltage according to the second brightness gamma lookup table.
6. A driving system of a display panel, comprising:
the tristimulus values measuring module is used for measuring tristimulus values of red, green and blue displayed by the display panel at all gray scales;
the accuracy promotion module is used for promoting the accuracy of the tristimulus values of all gray scales for displaying the preset colors to a preset digit through a linear interpolation method;
the conversion module is used for converting the tristimulus values of red, green and blue displayed on each gray scale of the display panel into a target brightness value, a first target chromatic value and a second target chromatic value of each white gray scale;
the searching module is used for searching and storing a target tristimulus value which meets the conditions of the target brightness value, the first target chromatic value and the second target chromatic value from a preset tristimulus value searching table through a minimum error method;
the visual angle compensation module is used for carrying out visual angle compensation on first driving data used for driving the display panel through a visual angle compensation algorithm to obtain second driving data;
the white balance module is used for carrying out white balance adjustment on the second driving data according to a target tristimulus value to obtain third driving data;
the response time compensation module is used for performing response time compensation on the third driving data through a response time compensation algorithm to obtain fourth driving data;
the error diffusion module is used for performing error diffusion processing on the fourth driving data through a dithering algorithm to obtain fifth driving data so as to drive the display panel to display;
the calculation formula for converting the tristimulus values of red, green and blue displayed on each gray scale of the display panel into the target brightness value, the first target colorimetric value and the second target colorimetric value of each white gray scale is as follows:
Y_R+Y_G+Y_B＝Gamma 2.2；
Wx＝X/(X+Y+Z)；
Wy＝Y/(X+Y+Z)；
wherein, Y _ R is a red luminance factor, Y _ G is a green luminance factor, Y _ B is a blue luminance factor, Gamma2.2 is a target luminance value, Wx is a first target chromaticity value, Wy is a second target chromaticity value, X is a red primary color stimulus amount, Y is a green primary color stimulus amount, and Z is a blue primary color stimulus amount.
7. A display device comprising a memory, a screen driver board, and a computer program stored in said memory and executable on said screen driver board, wherein said display device further comprises a display panel, and wherein said screen driver board implements the steps of the method of any one of claims 1 to 5 when said computer program is executed.
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