CN107492360B - Driving method and display device - Google Patents
Driving method and display device Download PDFInfo
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- CN107492360B CN107492360B CN201710876951.9A CN201710876951A CN107492360B CN 107492360 B CN107492360 B CN 107492360B CN 201710876951 A CN201710876951 A CN 201710876951A CN 107492360 B CN107492360 B CN 107492360B
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
Abstract
The invention discloses a driving method and a display device. The method comprises the following steps: acquiring a data signal of a picture; acquiring a first driving voltage signal and a second driving voltage signal corresponding to the data signal, wherein the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal; generating a first quasi-driving voltage signal according to a first preset generation rule and a second quasi-driving voltage signal according to a second preset generation rule by using the first driving voltage signal and the second driving voltage signal; calculating a high-frequency factor corresponding to each pixel in the data signal according to a preset calculation rule; generating a driving voltage signal according to the high-frequency factor, the first quasi driving voltage signal and the second quasi driving voltage signal; and driving the display panel to display the picture according to the driving voltage signal. The method can improve the visual angle of the display device and improve the color cast problem of the picture in a large visual angle.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method and a display device.
Background
With the development of the liquid crystal display field, higher image quality has become a main index for each large display maker. The viewing angle has become an important parameter of a VA (Vertical Alignment) type liquid crystal display device as an important index of image quality. However, in the conventional VA liquid crystal display device, a curve of transmittance and a driving voltage is greatly shifted in a large viewing angle, which causes a problem that a contrast of a screen is lowered in a large viewing angle and color shift is likely to occur.
Disclosure of Invention
The invention provides a driving method and a display device, which are used for improving the picture contrast of the display device on a large visual angle and improving the color cast problem of the large visual angle.
The invention provides a driving method for driving a display panel to display pictures, which comprises the following steps:
acquiring a data signal of a picture;
acquiring a first driving voltage signal and a second driving voltage signal corresponding to the data signal through a display lookup table, wherein the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal;
generating a first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that pixels corresponding to the first driving voltage signal and pixels corresponding to the second driving voltage signal are arranged alternately;
generating a second quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal are alternately arranged;
calculating a high-frequency factor corresponding to each pixel in the data signal according to a preset calculation rule;
generating a driving voltage signal according to the high-frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal; and
and driving the display panel to display the picture according to the driving voltage signal.
The invention also provides a driving method for driving a display panel to display a picture, which comprises the following steps:
acquiring a data signal of a picture;
acquiring a first driving voltage signal and a second driving voltage signal corresponding to the data signal, wherein the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal;
generating a first quasi-driving voltage signal according to a first preset generation rule and a second quasi-driving voltage signal according to a second preset generation rule by using the first driving voltage signal and the second driving voltage signal;
calculating a high-frequency factor corresponding to each pixel in the data signal according to a preset calculation rule;
generating a driving voltage signal according to the high-frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal; and
and driving the display panel to display the picture according to the driving voltage signal.
In the driving method provided by the present invention, the acquiring a first driving voltage signal and a second driving voltage signal corresponding to the data signal includes:
acquiring a first driving voltage signal corresponding to the data signal through a first display lookup table; and
and acquiring a second driving voltage signal corresponding to the data signal through a second display lookup table.
In the driving method provided by the present invention, the generating a first quasi driving voltage signal according to a first preset generation rule and a second quasi driving voltage signal according to a second preset generation rule from the first driving voltage signal and the second driving voltage signal includes:
generating the first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that pixels corresponding to the first driving voltage signal and pixels corresponding to the second driving voltage signal are arranged alternately; and
and generating the second quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to the mode that the sub-pixel corresponding to the first driving voltage signal and the sub-pixel corresponding to the second driving voltage signal are alternately arranged.
In the driving method provided by the present invention, the calculating a high frequency factor corresponding to each pixel in the data signal according to a preset calculation rule includes:
calculating the gray scale difference value of each sub-pixel in each pixel and the corresponding sub-pixel in the adjacent pixel in the data signal;
and acquiring the maximum value of the gray difference values corresponding to the pixels as the high-frequency factor corresponding to the pixels.
In the driving method provided by the present invention, the generating a driving voltage signal according to the high frequency factor, the first quasi driving voltage signal and the second quasi driving voltage signal includes:
adjusting the weight factors of the first quasi-driving voltage signal and the second quasi-driving voltage signal according to the high-frequency factor;
and generating the driving voltage signal according to the first quasi driving voltage signal, the second quasi driving voltage signal and the corresponding weight factors thereof.
In the driving method according to the present invention, the generating the first quasi driving voltage signal by alternately arranging the pixels corresponding to the first driving voltage signal and the pixels corresponding to the second driving voltage signal with respect to the first driving voltage signal includes:
and generating the first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to the alternate arrangement mode that one pixel corresponding to the second driving voltage signal is arranged between two adjacent pixels corresponding to the first driving voltage signal and one pixel corresponding to the first driving voltage signal is arranged between two adjacent pixels corresponding to the second driving voltage signal.
In the driving method according to the present invention, the generating the second quasi driving voltage signal by alternately arranging the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal includes:
and generating the second quasi-driving voltage signals by the first driving voltage signals and the second driving voltage signals according to the alternate arrangement mode that one sub-pixel corresponding to the second driving voltage signal is arranged between two adjacent sub-pixels corresponding to the first driving voltage signals and one sub-pixel corresponding to the first driving voltage signal is arranged between two adjacent sub-pixels corresponding to the second driving voltage signals.
In the driving method provided by the present invention, the adjusting the weighting factors of the first and second quasi-driving voltage signals according to the high frequency factor includes:
setting the high frequency factor as a weight factor of a corresponding pixel in the first quasi-driving voltage signal, and taking a difference value between 1 and the high frequency factor as the weight factor of the corresponding pixel in the second quasi-driving voltage signal.
The present invention also provides a display device, comprising:
a display panel;
and the driving device is connected with the display panel and used for executing any one of the driving methods provided by the invention to drive the display panel to display the picture.
The invention provides a driving method and a display device. After acquiring a data signal of a picture, acquiring a first driving voltage signal and a second driving voltage signal corresponding to the data signal, wherein the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal; generating a first quasi-driving voltage signal according to a first preset generation rule and a second quasi-driving voltage signal according to a second preset generation rule by using the first driving voltage signal and the second driving voltage signal; calculating a high-frequency factor corresponding to each pixel in the data signal according to a preset calculation rule, and generating a driving voltage signal according to the high-frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal; and finally, driving the display panel to display the picture according to the driving voltage signal. The method can improve the visual angle of the display device and the contrast of the picture in a large visual angle, and solve the problem of color cast of the picture in the large visual angle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a driving method according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of step S102 in the driving method shown in fig. 1;
fig. 3 is a detailed flowchart of step S103 in the driving method shown in fig. 1;
fig. 4 is a schematic diagram illustrating an effect corresponding to the first quasi-driving voltage signal in step S1031 shown in fig. 3;
fig. 5 is a schematic diagram illustrating an effect corresponding to the second quasi-driving voltage signal in step S1032 shown in fig. 3;
fig. 6 is a detailed flowchart of step S104 in the driving method shown in fig. 1;
fig. 7 is a detailed flowchart of step S105 in the driving method shown in fig. 1;
fig. 8 is a schematic structural diagram of a driving device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
The terms "first," "second," and the like in the present disclosure may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first control may be referred to as a second control, and similarly, a second control may be referred to as a first control, without departing from the scope of the present invention. The first control and the second control are both controls, but they are not the same control. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Referring to fig. 1, fig. 1 is a schematic flow chart of a driving method in the present embodiment. The driving method is used for driving a display panel in the display device to display pictures. In some embodiments, the display panel may be, for example, a liquid crystal display panel, an OLED display panel, a QLED display panel, or another type of display panel, which is not limited herein. The driving method includes steps S101 to S106.
S101, acquiring a data signal of a picture.
When the display device displays the picture, the display device displays the picture frame by frame, each picture corresponds to a data signal, after the display device receives the data signal of one frame of picture, the data signal of the picture is processed and converted into a corresponding driving voltage, and each pixel unit in the display panel is driven to work by the driving voltage so as to display the picture. Therefore, in the present embodiment, the display device first acquires the data signal of the screen, and performs step S102.
S102, a first driving voltage signal and a second driving voltage signal corresponding to the data signal are obtained, wherein the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal.
In an embodiment, specifically, the first driving voltage signal and the second driving voltage signal corresponding to the data signal are obtained through a display search unit. Wherein, the display search unit is a RAM memory. Specifically, the display search unit is a memory in a controller in the display device. When the display device is powered on, the controller reads a Look-Up Table (Look-Up-Table, abbreviated as LUT) stored in the ROM into the display Look-Up unit.
The display lookup table stores a corresponding relationship between the data signal and the driving voltage. Therefore, after the display device acquires the data signal, the first driving voltage signal and the second driving voltage signal corresponding to the data signal can be acquired through the display lookup table in the display lookup unit.
In this embodiment, the first driving voltage signal is higher than the reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal. The reference driving voltage signal is a driving voltage corresponding to the data signal when the display device does not adjust the voltage of the driving voltage corresponding to the data signal. That is, the display device finds the driving voltage value corresponding to the gray value of each sub-pixel in the data signal according to the conventional correspondence between the gray value and the driving voltage value, and the driving voltage value corresponding to the sub-pixel of the whole frame forms the reference driving voltage signal.
The first driving voltage signal is higher than the reference driving voltage signal, which indicates that the display device needs to perform the increasing processing on the driving voltage corresponding to the data signal of the whole frame. The second driving voltage signal is lower than the reference driving voltage signal, which indicates that the display device needs to perform the lowering process on the driving voltage corresponding to the data signal of the whole frame.
In an embodiment, please refer to fig. 2, wherein fig. 2 is a schematic flowchart illustrating a specific process of step S102 in the driving method shown in fig. 1. This step S102 specifically includes steps S1021 and S1022.
And S1021, acquiring a first driving voltage signal corresponding to the data signal through a first display lookup table.
The display lookup unit stores a first display lookup table. The first display lookup table is used for storing the corresponding relation between the gray value in the data signal and the first driving voltage value. The display device can obtain the first driving voltage signal corresponding to the data signal according to the first display lookup table.
It is understood that the first driving voltage signal includes a first driving voltage value corresponding to each sub-pixel in the whole picture.
And S1022, acquiring a second driving voltage signal corresponding to the data signal through a second display lookup table.
The display lookup unit also stores a second display lookup table. The second display lookup table is used for storing the corresponding relation between the gray value in the data signal and the second driving voltage value. The display device can obtain a second driving voltage signal corresponding to the data signal according to the second display lookup table.
It is understood that the second driving voltage signal includes a second driving voltage value corresponding to each sub-pixel in the whole picture.
S103, generating a first quasi-driving voltage signal according to a first preset generation rule and a second quasi-driving voltage signal according to a second preset generation rule by using the first driving voltage signal and the second driving voltage signal.
In an embodiment, please refer to fig. 3, wherein fig. 3 is a flowchart illustrating a specific process of step S103 in the driving method shown in fig. 1. This step S103 specifically includes steps S1031 to S1032.
And S1031, generating the first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that the pixels corresponding to the first driving voltage signal and the pixels corresponding to the second driving voltage signal are alternately arranged.
In an embodiment, generating the first quasi driving voltage signal and the second driving voltage signal in a manner that pixels corresponding to the first driving voltage signal and pixels corresponding to the second driving voltage signal are alternately arranged includes: and generating the first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to the alternate arrangement mode that one pixel corresponding to the second driving voltage signal is arranged between two adjacent pixels corresponding to the first driving voltage signal and one pixel corresponding to the first driving voltage signal is arranged between two adjacent pixels corresponding to the second driving voltage signal.
Specifically, referring to fig. 4, fig. 4 is a schematic diagram illustrating an effect corresponding to the first quasi-driving voltage signal in step S1031 shown in fig. 3. In fig. 4, the first quasi driving voltage signal is a combination of the first driving voltage signal and the second driving voltage signal. Marking a pixel corresponding to a first driving voltage signal in the first quasi-driving voltage signal as a first pixel 10, and filling oblique lines in the pixel; the pixel corresponding to the second driving voltage signal in the first quasi driving voltage signal is labeled as the second pixel 20.
As can be seen from fig. 4, the first pixels 10 and the second pixels 20 are alternately arranged in both the row direction and the column direction. Specifically, one second pixel 20 is provided between two adjacent first pixels 10 in the row direction and in the column direction, and one first pixel 10 is provided between two adjacent second pixels 20. The first driving voltage signals corresponding to the first pixels 10 and the second driving voltage signals corresponding to the second pixels 20 are selected to be combined to form a first quasi driving voltage signal corresponding to the whole frame.
S1032, generating the second quasi driving voltage signal by alternately arranging the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal according to the first driving voltage signal and the second driving voltage signal.
In an embodiment, generating the second quasi driving voltage signal by alternately arranging the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal according to the first driving voltage signal and the second driving voltage signal includes: and generating the second quasi-driving voltage signals by the first driving voltage signals and the second driving voltage signals according to the alternate arrangement mode that one sub-pixel corresponding to the second driving voltage signal is arranged between two adjacent sub-pixels corresponding to the first driving voltage signals and one sub-pixel corresponding to the first driving voltage signal is arranged between two adjacent sub-pixels corresponding to the second driving voltage signals.
Specifically, referring to fig. 5, fig. 5 is a schematic diagram illustrating an effect corresponding to the second quasi-driving voltage signal in step S1032 shown in fig. 3. In fig. 5, the second quasi driving voltage signal is also a combination of the first driving voltage signal and the second driving voltage signal. Marking the sub-pixel corresponding to the first driving voltage signal in the second quasi-driving voltage signal as a first sub-pixel 30, and filling oblique lines in the sub-pixel; the sub-pixel corresponding to the second driving voltage signal in the second quasi-driving voltage signal is labeled as the second sub-pixel 40.
As can be seen from fig. 5, the first sub-pixels 30 and the second sub-pixels 40 are alternately arranged in both the row direction and the column direction. Specifically, one second sub-pixel 40 is disposed between two adjacent first sub-pixels 30 in the row direction and in the column direction, and one first sub-pixel 30 is disposed between two adjacent second sub-pixels 40. The first driving voltage signals corresponding to the plurality of first sub-pixels 30 and the second driving voltage signals corresponding to the plurality of second sub-pixels 40 are selected to be combined to form second quasi-driving voltage signals corresponding to the whole picture.
And S104, calculating a high-frequency factor corresponding to each pixel in the data signal according to a preset calculation rule.
In the present embodiment, the high frequency factor is used to characterize the degree of brightness variation of the picture. The higher the value of the high-frequency factor, the larger the change in the brightness of the picture, and the picture is a high-frequency picture. Accordingly, a smaller value of the high frequency factor indicates that the luminance change of the picture is not obvious, and the picture is a low frequency picture.
In an embodiment, please refer to fig. 6, wherein fig. 6 is a flowchart illustrating a specific process of step S104 in the driving method shown in fig. 1. The step S104 includes steps S1041 to S1042.
S1041, calculating a gray scale difference value between each sub-pixel in each pixel and a corresponding sub-pixel in an adjacent pixel in the data signal.
As shown in table 1, Pixel (i, j) represents the Pixel in the ith row and the jth column of the display panel, where i and j are both positive integers. The following description will be given taking as an example the calculation of the gray scale difference between each sub-Pixel in the Pixel (i, j) in the data signal and the corresponding sub-Pixel in the adjacent Pixel.
TABLE 1
| Pixel(i-1,j-1) | Pixel(i-1,j) | Pixel(i-1,j+1) |
| Pixel(i,j-1) | Pixel(i,j) | Pixel(i,j+1) |
| Pixel(i+1,j-1) | Pixel(i+1,j) | Pixel(i+1,j+1) |
It is assumed that each pixel includes three sub-pixels of a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and 1 denotes the red sub-pixel, 2 denotes the green sub-pixel, and 3 denotes the blue sub-pixel. The gray scale difference values of the red, green, and blue sub-pixels Pixel (i, j,1, i, j,2, i, j,3) of the Pixel (i, j) and the corresponding sub-pixels of the neighboring pixels can be expressed as follows:
A1＝ABS(pixel(i,j,1)-pixel(i-1,j-1,1))
A2＝ABS(pixel(i,j,1)-pixel(i-1,j,1))
A3＝ABS(pixel(i,j,1)-pixel(i-1,j+1,1))
A4＝ABS(pixel(i,j,1)-pixel(i,j-1,1))
A5＝ABS(pixel(i,j,1)-pixel(i,j+1,1))
A6＝ABS(pixel(i,j,1)-pixel(i+1,j-1,1))
A7＝ABS(pixel(i,j,1)-pixel(i+1,j,1))
A8＝ABS(pixel(i,j,1)-pixel(i+1,j+1,1))
A9＝ABS(pixel(i,j,2)-pixel(i-1,j-1,2))
A10＝ABS(pixel(i,j,2)-pixel(i-1,j,2))
A11＝ABS(pixel(i,j,2)-pixel(i-1,j+1,2))
A12＝ABS(pixel(i,j,2)-pixel(i,j-1,2))
A13＝ABS(pixel(i,j,2)-pixel(i,j+1,2))
A14＝ABS(pixel(i,j,2)-pixel(i+1,j-1,2))
A15＝ABS(pixel(i,j,2)-pixel(i+1,j,2))
A16＝ABS(pixel(i,j,2)-pixel(i+1,j+1,2))
A17＝ABS(pixel(i,j,3)-pixel(i-1,j-1,3))
A18＝ABS(pixel(i,j,3)-pixel(i-1,j,3))
A19＝ABS(pixel(i,j,3)-pixel(i-1,j+1,3))
A20＝ABS(pixel(i,j,3)-pixel(i,j-1,3))
A21＝ABS(pixel(i,j,3)-pixel(i,j+1,3))
A22＝ABS(pixel(i,j,3)-pixel(i+1,j-1,3))
A23＝ABS(pixel(i,j,3)-pixel(i+1,j,3))
A24＝ABS(pixel(i,j,3)-pixel(i+1,j+1,3))
since there are eight pixels adjacent to the Pixel (i, j), the number of gray scale differences corresponding to each sub-Pixel is eight, and the sub-pixels of three colors of red, green, and blue have 24 gray scale differences in total, and the 24 gray scale differences are taken as the gray scale differences corresponding to the Pixel (i, j).
In one embodiment, for convenience of calculation, after obtaining the 24 gray scale difference values, a normalization process is further performed on the 24 gray scale difference values to normalize the gray scale difference values to a value between 0 and 1. It is to be understood that the gray scale value of each sub-pixel may be normalized before calculating the gray scale difference value, and is not limited in particular.
S1042, acquiring the maximum value of the gray scale difference values corresponding to the pixels as the high-frequency factor corresponding to the pixels.
And after acquiring a plurality of gray scale difference values corresponding to each pixel, taking the maximum gray scale difference value in each pixel as a high-frequency factor corresponding to the pixel. It will be appreciated that the high frequency factor is a value between 0 and 1.
It should be noted that, in other embodiments, other high-frequency factor calculation methods may also be adopted, and are not limited in particular herein.
And S105, generating a driving voltage signal according to the high-frequency factor, the first quasi driving voltage signal and the second quasi driving voltage signal.
After the corresponding high frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal are obtained according to steps S103 and S104, the driving voltage signal is generated according to the high frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal.
Specifically, in an embodiment, please refer to fig. 7, and fig. 7 is a specific flowchart illustrating step S105 of the driving method shown in fig. 1. The step S105 includes steps S1051 to S1052.
S1051, adjusting the weight factors of the first quasi-driving voltage signal and the second quasi-driving voltage signal according to the high frequency factor.
In one embodiment, adjusting the weighting factors of the first and second quasi-driving voltage signals according to the high frequency factor comprises: setting the high frequency factor as a weight factor of a corresponding pixel in the first quasi-driving voltage signal, and taking a difference value between 1 and the high frequency factor as the weight factor of the corresponding pixel in the second quasi-driving voltage signal.
Specifically, the high-frequency factor corresponding to the Pixel (i, j) is labeled as HF (i, j). The high frequency factor HF (i, j) is taken as the weight factor for the Pixel (i, j) in the first quasi drive voltage signal and (1-HF (i, j)) is taken as the weight factor for the Pixel (i, j) in the second quasi drive voltage signal.
And S1052, generating the driving voltage signal according to the first quasi driving voltage signal, the second quasi driving voltage signal and the corresponding weight factors thereof.
And calculating the value of the first quasi-driving voltage signal multiplied by HF (i, j) corresponding to the Pixel (i, j) in the first quasi-driving voltage signal as an A value, calculating the value of the second quasi-driving voltage signal multiplied by (1-HF (i, j)) corresponding to the Pixel (i, j) in the second quasi-driving voltage signal as a B value, and calculating the sum of the A value and the B value as the driving voltage value corresponding to the Pixel (i, j) in the driving voltage signal. According to the method, the driving voltage value corresponding to each pixel in the driving voltage signal can be calculated, so that the driving voltage signal of the whole picture is formed.
And S106, driving the display panel to display the picture according to the driving voltage signal.
As can be seen from the process of calculating the driving voltage signal in step S105, the higher the high frequency factor is, the larger the component of the first quasi-driving voltage signal in the driving voltage signal is; the lower the high frequency factor, the larger the contribution of the second quasi-drive voltage signal in the drive voltage signal. The weight of the first quasi-driving voltage signal and the weight of the second quasi-driving voltage signal in the driving voltage signals are adjusted according to the high-frequency factor of the picture, and after the driving voltage signals are adopted to drive the display panel to display the picture, the visual angle of the picture can be improved, the color cast problem under a large visual angle can be improved, and the condition of wire break can be prevented.
In this embodiment, after acquiring a data signal of a picture, the driving method acquires a first driving voltage signal and a second driving voltage signal corresponding to the data signal, where the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal; generating a first quasi-driving voltage signal according to a first preset generation rule and a second quasi-driving voltage signal according to a second preset generation rule by using the first driving voltage signal and the second driving voltage signal; calculating a high-frequency factor corresponding to each pixel in the data signal according to a preset calculation rule, and generating a driving voltage signal according to the high-frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal; and finally, driving the display panel to display the picture according to the driving voltage signal. The method can improve the visual angle of the display device and the contrast of the picture in a large visual angle, improve the problem of color cast of the picture in the large visual angle and prevent the occurrence of the broken line.
Referring to fig. 8, fig. 8 is a schematic structural diagram of the driving device in the present embodiment. The driving device 300 may be provided in a display device. The driving device 300 may specifically execute any one of the driving methods described above. The display device may be, for example, a liquid crystal display device, an OLED display device, a QLED display device, or other types of display devices, and is not particularly limited herein.
The driving apparatus 300 includes a signal acquisition unit 310, a display search unit 320, a first generation unit 330, a factor calculation unit 340, a second generation unit 350, and a driving unit 360. The driving device 300 of the present embodiment will be described in detail with reference to fig. 8.
(1) A signal acquisition unit 310;
a signal acquiring unit 310 for acquiring a data signal of a picture.
When the display device displays a frame, the display device displays the frame by frame, each frame corresponds to a data signal, and the signal acquisition unit 310 transmits the data signal of the frame to the display search unit 320 after receiving the data signal of the frame.
(2) A display search unit 320;
the display search unit 320 is configured to obtain a first driving voltage signal and a second driving voltage signal corresponding to the data signal, where the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal.
In one embodiment, the display lookup unit 320 is a RAM memory. Specifically, the display search unit 320 is a memory in a controller in the display device. When the display device is powered on, the controller first reads a Look-Up Table (Look-Up-Table, abbreviated as LUT) stored in the ROM into the display lookup unit 320.
The display lookup table stores a corresponding relationship between the data signal and the driving voltage. Therefore, the display lookup unit 320 may obtain the first driving voltage signal and the second driving voltage signal corresponding to the data signal through the display lookup table.
In this embodiment, the first driving voltage signal is higher than the reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal. The reference driving voltage signal is a driving voltage corresponding to the data signal when the driving voltage corresponding to the data signal is not voltage-regulated. That is, the driving voltage value corresponding to the gray value of each sub-pixel in the data signal is found according to the conventional correspondence between the gray value and the driving voltage value, and the driving voltage value corresponding to the sub-pixel of the whole frame forms the reference driving voltage signal.
In one embodiment, the display lookup unit 320 stores a first display lookup table and a second display lookup table. The first display lookup table is used for storing the corresponding relation between the gray value in the data signal and the first driving voltage value. The second display lookup table is used for storing the corresponding relation between the gray value in the data signal and the second driving voltage value. The display lookup unit 320 obtains a first driving voltage signal corresponding to the data signal through the first display lookup table, and obtains a second driving voltage signal corresponding to the data signal through the second display lookup table.
In other embodiments, the number of the display lookup units 320 is two, wherein one display lookup unit 320 is used for storing the first display lookup table, and the other display lookup unit 320 is used for storing the second display lookup table. The number of the display lookup tables 320 may be more, and the number of the display lookup units 320 is not limited herein.
(3) A first generation unit 330;
a first generating unit 330, configured to generate a first quasi driving voltage signal according to a first preset generating rule and a second quasi driving voltage signal according to a second preset generating rule from the first driving voltage signal and the second driving voltage signal.
In an embodiment, the first generating unit 330 includes a first generating subunit 331 and a second generating subunit 332.
(31) A first generation subunit 331;
the first generating subunit 331 is configured to generate the first quasi driving voltage signal according to a manner that pixels corresponding to the first driving voltage signal and pixels corresponding to the second driving voltage signal are alternately arranged.
In an embodiment, the first generating sub-unit 331 is specifically configured to generate the first quasi-driving voltage signal according to an alternate arrangement manner that one pixel corresponding to the second driving voltage signal is arranged between two adjacent pixels corresponding to the first driving voltage signal and one pixel corresponding to the first driving voltage signal is arranged between two adjacent pixels corresponding to the second driving voltage signal.
That is, the first quasi driving voltage signal generated by the first generation sub-unit 331 is a combination of the first driving voltage signal and the second driving voltage signal. The pixels corresponding to the first driving voltage signal and the pixels corresponding to the second driving voltage signal in the first quasi driving voltage signal are alternately arranged.
(32) A second generation subunit 332;
a second generating subunit 332, configured to generate the second quasi driving voltage signal by alternately arranging the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal according to the first driving voltage signal and the second driving voltage signal.
In an embodiment, the second generating subunit 332 is specifically configured to generate the second quasi driving voltage signal by the first driving voltage signal and the second driving voltage signal in an alternating arrangement manner that one sub-pixel corresponding to the second driving voltage signal is arranged between two adjacent sub-pixels corresponding to the first driving voltage signal and one sub-pixel corresponding to the first driving voltage signal is arranged between two adjacent sub-pixels corresponding to the second driving voltage signal.
That is, the second quasi-driving voltage signal generated by the second generation subunit 332 is also a combination of the first driving voltage signal and the second driving voltage signal. The sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal in the second quasi driving voltage signal are alternately arranged.
(4) A factor calculation unit 340;
and a factor calculating unit 340, configured to calculate a high-frequency factor corresponding to each pixel in the data signal according to a preset calculation rule.
In the present embodiment, the high frequency factor is used to characterize the degree of brightness variation of the picture. The higher the value of the high-frequency factor, the larger the change in the brightness of the picture, and the picture is a high-frequency picture. Accordingly, a smaller value of the high frequency factor indicates that the luminance change of the picture is not obvious, and the picture is a low frequency picture.
In one embodiment, the factor calculating unit 340 includes a calculating subunit 341 and an obtaining subunit 342.
(41) A calculation subunit 341;
a calculating subunit 341, configured to calculate a gray scale difference value between each sub-pixel in each pixel in the data signal and a corresponding sub-pixel in an adjacent pixel;
the calculation sub-unit 341 specifically calculates an absolute value of a difference between the gradation values of each sub-pixel in each pixel and the corresponding sub-pixels in the surrounding eight pixels. Assuming that each pixel includes three sub-pixels, namely, a red sub-pixel, a green sub-pixel and a blue sub-pixel, the calculating sub-unit 341 calculates 24 gray scale differences corresponding to each pixel.
In an embodiment, for convenience of calculation, after calculating 24 gray scale difference values corresponding to each pixel, the calculating subunit 341 further needs to perform normalization processing on the 24 gray scale difference values to normalize the gray scale difference values to a value between 0 and 1. It is understood that the calculating subunit 341 may also perform normalization processing on the gray scale value of each sub-pixel before calculating the gray scale difference value, and is not limited in particular here.
(42) Acquisition subunit 342
The obtaining subunit 342 is configured to obtain a maximum value of the multiple gray scale difference values corresponding to the pixel as a high-frequency factor corresponding to the pixel.
The obtaining sub-unit 342 receives the plurality of gray scale difference values corresponding to each pixel sent by the calculating sub-unit 341, and then obtains the largest gray scale difference value in each pixel as the high frequency factor corresponding to the pixel. It will be appreciated that the high frequency factor is a value between 0 and 1.
(5) A second generation unit 350;
a second generating unit 350, configured to generate a driving voltage signal according to the high frequency factor, the first quasi driving voltage signal, and the second quasi driving voltage signal.
In an embodiment, the second generating unit 350 includes an adjusting sub-unit 351 and a third generating sub-unit 352.
(51) An adjustment subunit 351;
an adjusting subunit 351, configured to adjust the weighting factors of the first and second quasi-driving voltage signals according to the high frequency factor.
In an embodiment, the adjusting subunit 351 is specifically configured to set the high frequency factor as a weighting factor of a corresponding pixel in the first quasi driving voltage signal, and to use a difference value between 1 and the high frequency factor as the weighting factor of the corresponding pixel in the second quasi driving voltage signal.
Specifically, since each Pixel corresponds to one high frequency factor, the high frequency factor corresponding to the Pixel (i, j) is labeled as HF (i, j). The adjusting subunit 351 adjusts the weighting factors of the first quasi driving voltage signal and the second quasi driving voltage signal according to the high frequency factor specifically as follows: the high frequency factor HF (i, j) is taken as the weight factor for the Pixel (i, j) in the first quasi drive voltage signal and (1-HF (i, j)) is taken as the weight factor for the Pixel (i, j) in the second quasi drive voltage signal.
(52) A third generation subunit 352;
a third generating subunit 352, configured to generate the driving voltage signal according to the first quasi driving voltage signal, the second quasi driving voltage signal and their corresponding weighting factors
Specifically, the third generation subunit 352 calculates a value obtained by multiplying the first quasi drive voltage signal corresponding to the Pixel (i, j) in the first quasi drive voltage signal by HF (i, j) as an a value, calculates a value obtained by multiplying the second quasi drive voltage signal corresponding to the Pixel (i, j) in the second quasi drive voltage signal by (1-HF (i, j)) as a B value, and calculates the sum of the a value and the B value as the drive voltage value corresponding to the Pixel (i, j) in the drive voltage signal. The third generating subunit 352 sequentially calculates the driving voltage value corresponding to each pixel in the driving voltage signal, so as to form the driving voltage signal of the whole frame.
(6) A driving unit 360;
the driving unit 360 is configured to drive the display panel to display the picture according to the driving voltage signal.
After the second generating unit 350 generates the driving voltage signal, the driving voltage signal is transmitted to the driving unit 360, and the driving unit 360 drives the display panel to display the picture according to the driving voltage signal.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the driving apparatus 300 and each unit described above may refer to the corresponding processes in the foregoing driving method embodiments, and are not described herein again.
In addition, in the embodiment of the apparatus of the present invention, each functional unit may be integrated in one controller, or each unit may exist alone physically, or two or more units are integrated in one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
In this embodiment, after the signal acquiring unit 310 acquires the data signal of the picture, the display searching unit 320 of the driving device 300 acquires a first driving voltage signal and a second driving voltage signal corresponding to the data signal; then, the first generating unit 330 generates a first quasi-driving voltage signal according to a first preset generating rule and a second quasi-driving voltage signal according to a second preset generating rule from the first driving voltage signal and the second driving voltage signal; the factor calculating unit 340 calculates a high frequency factor corresponding to each pixel in the data signal according to a preset calculation rule, and the second generating unit 350 generates a driving voltage signal according to the high frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal; finally, the driving unit 360 drives the display panel to display the image according to the driving voltage signal. The driving device 300 can improve the viewing angle of the display device and the contrast of the picture in a large viewing angle, improve the problem of color cast of the picture in the large viewing angle, and prevent the occurrence of the broken line.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a display device according to an embodiment of the invention. The display device 400 may be a liquid crystal display panel, an OLED display panel, a QLED display panel, or other types of display panels, and is not particularly limited herein.
The display device 400 includes a display panel 410 and a driving device 420. The display panel 410 is used for displaying a screen. The driving device 420 is connected to the display panel 410 and is used for driving the display panel 410 to display a picture.
Specifically, in this embodiment, the driving device 420 may be any one of the driving devices provided in the present invention, and the driving device 420 may execute any one of the driving methods provided in the present invention to drive the display panel 410 to display a picture. The principle and process of the driving device 420 for driving the display panel 410 to display the image are described in detail in the embodiments of the driving method and the driving device in this specification. Since the first embodiments of the present disclosure have described the driving method and the driving apparatus provided by the present disclosure in detail, for the simplicity of the description, detailed descriptions are omitted here.
The display device 400 in this embodiment includes the display panel 410 and the driving device 420, and the driving device 420 can execute any one of the driving methods provided by the present invention to drive the display panel 410 to display the picture, so that the visual angle of the display device 400 and the contrast of the picture at a large viewing angle are greatly improved, and meanwhile, the problem of color cast of the picture at a large viewing angle is also well improved.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A driving method for driving a display panel to display a picture, comprising:
acquiring a data signal of a picture;
acquiring a first driving voltage signal and a second driving voltage signal corresponding to the data signal through a display lookup table, wherein the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal;
generating a first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that pixels corresponding to the first driving voltage signal and pixels corresponding to the second driving voltage signal are arranged alternately;
generating a second quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal are alternately arranged;
calculating the gray scale difference value of each sub-pixel in each pixel and the corresponding sub-pixel in the adjacent pixel in the data signal;
acquiring the maximum value of a plurality of gray level difference values corresponding to the pixel as a high-frequency factor corresponding to the pixel;
generating a driving voltage signal according to the high-frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal; and
and driving the display panel to display the picture according to the driving voltage signal.
2. A driving method for driving a display panel to display a picture, comprising:
acquiring a data signal of a picture;
acquiring a first driving voltage signal and a second driving voltage signal corresponding to the data signal, wherein the first driving voltage signal is higher than a reference driving voltage signal corresponding to the data signal, and the second driving voltage signal is lower than the reference driving voltage signal;
generating a first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that pixels corresponding to the first driving voltage signal and pixels corresponding to the second driving voltage signal are arranged alternately; and
generating a second quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to a mode that the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal are alternately arranged;
calculating the gray scale difference value of each sub-pixel in each pixel and the corresponding sub-pixel in the adjacent pixel in the data signal;
acquiring the maximum value of a plurality of gray level difference values corresponding to the pixel as a high-frequency factor corresponding to the pixel;
generating a driving voltage signal according to the high-frequency factor, the first quasi-driving voltage signal and the second quasi-driving voltage signal; and
and driving the display panel to display the picture according to the driving voltage signal.
3. The driving method according to claim 2, wherein the obtaining the first driving voltage signal and the second driving voltage signal corresponding to the data signal comprises:
acquiring a first driving voltage signal corresponding to the data signal through a first display lookup table; and
and acquiring a second driving voltage signal corresponding to the data signal through a second display lookup table.
4. The driving method according to claim 2, wherein the calculating the high frequency factor corresponding to each pixel in the data signal according to a preset calculation rule comprises:
calculating the gray scale difference value of each sub-pixel in each pixel and the corresponding sub-pixel in the adjacent pixel in the data signal;
and acquiring the maximum value of the gray difference values corresponding to the pixels as the high-frequency factor corresponding to the pixels.
5. The driving method according to claim 2, wherein generating the driving voltage signal according to the high frequency factor, the first quasi driving voltage signal and the second quasi driving voltage signal comprises:
adjusting the weight factors of the first quasi-driving voltage signal and the second quasi-driving voltage signal according to the high-frequency factor;
and generating the driving voltage signal according to the first quasi driving voltage signal, the second quasi driving voltage signal and the corresponding weight factors thereof.
6. The driving method according to claim 2, wherein the generating the first quasi driving voltage signal by alternately arranging the pixels corresponding to the first driving voltage signal and the pixels corresponding to the second driving voltage signal comprises:
and generating the first quasi-driving voltage signal by the first driving voltage signal and the second driving voltage signal according to the alternate arrangement mode that one pixel corresponding to the second driving voltage signal is arranged between two adjacent pixels corresponding to the first driving voltage signal and one pixel corresponding to the first driving voltage signal is arranged between two adjacent pixels corresponding to the second driving voltage signal.
7. The driving method according to claim 2, wherein the generating the second quasi driving voltage signal by alternately arranging the sub-pixels corresponding to the first driving voltage signal and the sub-pixels corresponding to the second driving voltage signal comprises:
and generating the second quasi-driving voltage signals by the first driving voltage signals and the second driving voltage signals according to the alternate arrangement mode that one sub-pixel corresponding to the second driving voltage signal is arranged between two adjacent sub-pixels corresponding to the first driving voltage signals and one sub-pixel corresponding to the first driving voltage signal is arranged between two adjacent sub-pixels corresponding to the second driving voltage signals.
8. The driving method according to claim 5, wherein the adjusting the weighting factors of the first and second quasi-driving voltage signals according to the high frequency factor comprises:
setting the high frequency factor as a weight factor of a corresponding pixel in the first quasi-driving voltage signal, and taking a difference value between 1 and the high frequency factor as the weight factor of the corresponding pixel in the second quasi-driving voltage signal.
9. A display device, comprising:
a display panel;
a driving device, connected to the display panel, for executing any one of the driving methods of claims 2 to 8 to drive the display panel to display a picture.
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| CN102930840B (en) * | 2012-08-09 | 2015-03-18 | 京东方科技集团股份有限公司 | Liquid crystal display driving circuit as well as driving method and LCD (Liquid Crystal Display) thereof |
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