CN109285512B - Driving method and device of display panel - Google Patents
Driving method and device of display panel Download PDFInfo
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- CN109285512B CN109285512B CN201811253408.4A CN201811253408A CN109285512B CN 109285512 B CN109285512 B CN 109285512B CN 201811253408 A CN201811253408 A CN 201811253408A CN 109285512 B CN109285512 B CN 109285512B
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. 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
- 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
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a driving method and a device of a display panel, wherein the driving method of the display panel comprises the following steps: acquiring a gray-scale value to be displayed of a pixel corresponding to each sub-pixel; acquiring a first receiving time length of a preset data signal of a high level and a second receiving time length of the preset data signal of a low level corresponding to the sub-pixel according to the gray scale value to be displayed; wherein the preset data signal has a high level and a low level; and inputting the preset data signals to the corresponding sub-pixels, and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time length and the second receiving time length, so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time length and the low-level preset data signals in the second receiving time length to display the picture to be displayed. The driving method and the driving device of the display panel can avoid color tracking and color deviation and improve the display effect.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a method and an apparatus for driving a display panel.
[ background of the invention ]
In the conventional display picture, the white point color changes along with the change of the driving voltage, and the white point color changes from a dark state to a bright state, namely, color tracking appears.
The existing improvement method is to input different RGB gray scale voltages to each sub-pixel in the panel, and approach to a bright white point color through color mixing. However, different RGB gray scale voltages are mixed into the white point color, which is prone to cause color shift due to manufacturing process reasons, such as different liquid crystal cell (LC cell gap) and color resistance thicknesses.
Therefore, it is necessary to provide a driving method and device for a display panel to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide a driving method and a driving device of a display panel, which can avoid color tracking and color deviation and improve the display effect.
To solve the above technical problem, the present invention provides a driving method of a display panel, wherein the display panel includes a plurality of sub-pixels; the display panel is used for displaying a picture to be displayed; the sub-pixels correspond to pixels in the picture to be displayed; the method comprises the following steps:
acquiring a gray-scale value to be displayed of a pixel corresponding to each sub-pixel;
acquiring a first receiving time length of a preset data signal of a high level and a second receiving time length of the preset data signal of a low level corresponding to the sub-pixel according to the gray scale value to be displayed; wherein the preset data signal has a high level and a low level;
and inputting the preset data signals to the corresponding sub-pixels, and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time length and the second receiving time length, so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time length and the low-level preset data signals in the second receiving time length to display the picture to be displayed.
In the driving method of the display panel of the present invention, when the gray scale value to be displayed is greater than a preset gray scale value, the first receiving duration is greater than the second receiving duration.
In the driving method of the display panel of the present invention, when the gray scale value to be displayed is less than or equal to a preset gray scale value, the first receiving time period is less than or equal to the second receiving time period.
In the driving method of the display panel of the present invention, in the same frame, the input duration of the preset data signal of the high level covers the first receiving duration; and the input duration of the low-level preset data signal covers the second receiving duration.
In the driving method of the display panel according to the present invention, the predetermined data signal is at a high level at a first time, and the scan signal is at a high level at a second time, where the first time is earlier than the second time.
In the driving method of the display panel according to the present invention, the predetermined data signal is at a low level at a third time, the scan signal is at a high level at a fourth time, and the third time is earlier than the fourth time.
The invention provides a driving device of a display panel, wherein the display panel comprises a plurality of sub-pixels; the display panel is used for displaying a picture to be displayed; the sub-pixels correspond to pixels in the picture to be displayed; the device includes:
the gray scale acquisition module is used for acquiring a to-be-displayed gray scale value of the pixel corresponding to each sub-pixel;
the time length obtaining module is used for obtaining a first receiving time length of a preset data signal of a high level and a second receiving time length of the preset data signal of a low level corresponding to the sub-pixel according to the gray scale value to be displayed; wherein the preset data signal has a high level and a low level;
and the input module is used for inputting the preset data signals to the corresponding sub-pixels and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time length and the second receiving time length so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time length and the low-level preset data signals in the second receiving time length to display the picture to be displayed.
In the driving apparatus of the display panel of the present invention, when the gray scale value to be displayed is greater than the preset gray scale value, the first receiving duration is greater than the second receiving duration.
In the driving apparatus of a display panel according to the present invention, when the gray-scale value to be displayed is smaller than or equal to a preset gray-scale value, the first receiving duration is smaller than or equal to the second receiving duration.
In the driving apparatus of a display panel according to the present invention, in the same frame, the input duration of the high-level preset data signal covers the first receiving duration; and the input duration of the low-level preset data signal covers the second receiving duration.
According to the driving method and the device of the display panel, the gray-scale value to be displayed of the pixel corresponding to each sub-pixel is obtained; acquiring a first receiving time length of a preset data signal of a high level corresponding to the sub-pixel and a second receiving time length of the preset data signal of a low level according to the gray scale value to be displayed; and inputting the preset data signals to the corresponding sub-pixels, and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time and the second receiving time so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time and the low-level preset data signals in the second receiving time to display the picture to be displayed.
[ description of the drawings ]
FIG. 1 is a driving waveform diagram of a conventional pixel;
FIG. 2 is a driving waveform diagram of a high gray level pixel according to the present invention;
FIG. 3 is a driving waveform diagram of a low gray level pixel according to the present invention.
FIG. 4 is a schematic structural diagram of a driving apparatus of a display panel according to the present invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
As shown in fig. 1, the abscissa of fig. 1 represents time, the ordinate represents voltage, the conventional display panel includes a plurality of sub-pixels, each sub-pixel is inputted with a data signal 11 and a scan signal 12, and during driving, different gray-scale colors are presented by inputting data signals 11 with different voltages to each sub-pixel, but the liquid crystal tilting condition is different due to the influence of the liquid crystal voltage difference of each sub-pixel (i.e. the voltage difference between the voltage of the data signal 11 and the common voltage 13), so that the color tracking (color tracking) phenomenon is easy to occur.
Referring to fig. 2 to 3, fig. 2 is a driving waveform diagram of a high gray-scale pixel according to the present invention.
As shown in fig. 2 to 3, the display panel of the present invention is used for displaying a picture to be displayed, and includes a plurality of sub-pixels, each of which is inputted with a data signal 21 and scanning signals 22 and 32, and further, each of which is inputted with a common voltage 13.
The driving method of the display panel of the invention comprises the following steps:
s101, acquiring a gray-scale value to be displayed of a pixel corresponding to each sub-pixel;
for example, each sub-pixel corresponds to a pixel in the frame to be displayed, and each pixel has a gray scale value, i.e., a gray scale value to be displayed. Specifically, a gray-scale value of a pixel corresponding to each sub-pixel is acquired.
S102, setting a first receiving time length of a high-level preset data signal and a second receiving time length of a low-level preset data signal of a corresponding sub-pixel according to the gray scale value to be displayed;
wherein the preset data signal has a high level and a low level. The preset data signal is a square wave signal.
For example, the reception duration (first reception duration) of the high-level preset data signal and the reception duration (second reception duration) of the low-level preset data signal are set according to the gray-scale value of the pixel corresponding to each sub-pixel. I.e. the actual data signal of each sub-pixel is derived from the preset data signal. Specifically, the actual data signals corresponding to the sub-pixels are generated according to the preset data signals of the high level in the first receiving time period and the preset data signals of the low level in the second receiving time period, so that the same preset data signals are input to each pixel, and the liquid crystal pressure difference is equal.
And S103, inputting the preset data signals to the corresponding sub-pixels, and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time length and the second receiving time length, so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time length and the low-level preset data signals in the second receiving time length, and the picture to be displayed is displayed.
In general, a display panel includes two kinds of pixels, i.e., a pixel having a large gray-scale value and a pixel having a small gray-scale value, and the following description is made in a classified manner.
In an embodiment, as shown in fig. 2, for example, a single pixel is taken as an example, the gray scale value of the pixel corresponding to the sub-pixel is larger, that is, the gray scale value to be displayed is larger than the preset gray scale value. The input of the sub-pixel is the preset data signal 21, the input of the scanning signal 22 and the common voltage 13.
Specifically, the preset data signal 21 is input to the corresponding sub-pixel, and the high-level scan signal 22 is input to the corresponding sub-pixel within the first receiving time period t1 and the second receiving time period t2, so that the sub-pixel receives the high-level preset data signal 21 of the first receiving time period t1 and the low-level preset data signal 21 of the second receiving time period t2, the voltage of the high-level preset data signal 21 is V2, and the voltage of the low-level preset data signal 21 is V1, thereby displaying the pixel having the set gray scale according to the combination of V2 and V1.
Wherein, in the first receiving time period t1, the preset data signal 21 is at a high level; during the second receiving time period t2, the predetermined data signal 21 is at a low level. In the same frame, the input time of the high-level preset data signal 21 (the time when the source driver chip outputs the preset data signal) covers the first receiving time period t1, and the input time of the low-level preset data signal 21 covers the second receiving time period t 2. The scanning signal 22 is at a high level at the second time and the fourth time, the preset data signal 21 is at a high level at the first time, the scanning signal 22 is at a high level at the second time, and the first time is earlier than the second time. The preset data signal 21 is at a low level at a third time, the scan signal is also at a high level at a fourth time, and the third time is earlier than the fourth time. That is, the predetermined data signal 21 is already at the high level before the scan signal 22 is at the high level (at the time a). The preset data signal 21 is already at a low level before the scan signal 22 is at a high level (at time B).
When the gray scale value to be displayed is greater than a preset gray scale value, the first receiving time period t1 is greater than the second receiving time period t 2.
In another embodiment, as shown in fig. 3, the gray-scale value of the corresponding pixel of the sub-pixel is smaller. That is, the gray scale value to be displayed is less than or equal to the preset gray scale value. The data signal input to the subpixel is also 21, the scan signal 32 input, and the common voltage 13.
The sub-pixel inputs a high-level preset data signal for a time period of t3 and a low-level preset data signal for a time period of t4, the voltage of the high-level preset data signal is V2, and the voltage of the low-level preset signal is V1, so that a pixel with a set gray scale is displayed according to the combination of V2 and V1. The driving manner of the remaining sub-pixels is the same as that of the sub-pixels in fig. 2 or 3, and each sub-pixel inputs the same preset data signal, except that the receiving time of the high-level and low-level preset data signals 21 of each sub-pixel is different. The reception duration can be understood here as: when the scanning signal is at high level, the time length of the preset data signal actually input to the sub-pixel is up.
Specifically, the preset data signal 21 is input to the sub-pixel, and the scan signal 32 of the high level is input to the sub-pixel within the first receiving period t3 and the second receiving period t4, so that the sub-pixel receives the preset data signal 21 of the high level of the first receiving period t3 and the preset data signal 21 of the low level of the second receiving period t 4.
When the gray scale value to be displayed is smaller than or equal to a preset gray scale value, the first receiving time period t3 is smaller than or equal to the second receiving time period t 4. The driving modes of other sub-pixels are the same, and the whole picture to be displayed is displayed.
During the first receiving time period t3, the preset data signal 21 is at a high level; during the second receiving time period t4, the predetermined data signal 21 is at a low level. In the same frame, the input time of the high-level preset data signal 21 covers the first receiving time period t3, and the input time of the low-level preset data signal 21 covers the second receiving time period t 4. The scanning signal 32 is at a high level at the second time and the fourth time, the preset data signal 21 is at a high level at the first time, the scanning signal 32 is at a high level at the second time, and the first time is earlier than the second time. The preset data signal 21 is at a low level at a third time, and the scan signal 32 is also at a high level at a fourth time, where the third time is earlier than the fourth time. That is, the predetermined data signal 21 is already at the high level before the scan signal is at the high level (at time C). The preset data signal 21 is already at a low level before the scan signal is at a high level (at time D).
Because each pixel inputs the same preset data signal, the gray scale is formed by matching according to the opening time of the high-level preset data signal (the time of actually inputting the pixel) and the opening time of the low level, namely, the gray scale of the corresponding pixel is formed comprehensively according to the actually received high-level preset data signal and the low-level preset data signal of the pixel to display the whole picture, so that the toppling conditions of the liquid crystal are the same, the picture keeps the same gray scale color, the color tracking and the color deviation are avoided, and the display effect is improved.
As shown in fig. 4, the present invention also provides a driving apparatus 40 for a display panel, comprising: a gray level obtaining module 41, a duration obtaining module 42 and an input module 43.
The gray scale obtaining module 41 is configured to obtain a to-be-displayed gray scale value of a pixel corresponding to each sub-pixel.
The duration obtaining module 42 is configured to obtain a first receiving duration of a high-level preset data signal and a second receiving duration of a low-level preset data signal of a corresponding sub-pixel according to the to-be-displayed gray scale value; wherein the preset data signal has a high level and a low level.
The input module 43 is configured to input the preset data signal to the corresponding sub-pixel, and input a high-level scan signal to the corresponding sub-pixel within the first receiving duration and the second receiving duration, so that the corresponding sub-pixel receives the high-level preset data signal of the first receiving duration and the low-level preset data signal of the second receiving duration, so as to display the to-be-displayed picture.
When the gray scale value to be displayed is larger than a preset gray scale value, the first receiving time length is larger than the second receiving time length.
When the gray scale value to be displayed is smaller than or equal to a preset gray scale value, the first receiving time length is smaller than or equal to the second receiving time length.
In the same frame, the input duration of the high-level preset data signal covers the first receiving duration; and the input duration of the low-level preset data signal covers the second receiving duration.
The preset data signal is at a high level at a first moment, the scanning signal is at a high level at a second moment, and the first moment is earlier than the second moment.
The preset data signal is at a low level at a third moment, the scanning signal is at a high level at a fourth moment, and the third moment is earlier than the fourth moment.
According to the driving method and the device of the display panel, the gray-scale value to be displayed of the pixel corresponding to each sub-pixel is obtained; acquiring a first receiving time length of a preset data signal of a high level and a second receiving time length of the preset data signal of a low level corresponding to the sub-pixel according to the gray scale value to be displayed; and inputting the preset data signals to the corresponding sub-pixels, and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time and the second receiving time so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time and the low-level preset data signals in the second receiving time to display the picture to be displayed.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A driving method of a display panel, wherein the display panel comprises a plurality of sub-pixels; the display panel is used for displaying a picture to be displayed; the sub-pixels correspond to pixels in the picture to be displayed; the method comprises the following steps:
acquiring a gray-scale value to be displayed of a pixel corresponding to each sub-pixel;
acquiring a first receiving time length of a preset data signal of a high level and a second receiving time length of the preset data signal of a low level corresponding to the sub-pixel according to the gray scale value to be displayed; wherein the preset data signal has a high level and a low level;
and inputting the preset data signals to the corresponding sub-pixels, and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time length and the second receiving time length, so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time length and the low-level preset data signals in the second receiving time length to display the picture to be displayed.
2. The method according to claim 1, wherein the first receiving duration is longer than the second receiving duration when the gray-scale value to be displayed is larger than a preset gray-scale value.
3. The method according to claim 1, wherein the first receiving duration is less than or equal to the second receiving duration when the gray-scale value to be displayed is less than or equal to a preset gray-scale value.
4. The method according to claim 1, wherein the input duration of the high-level predetermined data signal overlaps the first receiving duration within the same frame; and the input duration of the low-level preset data signal covers the second receiving duration.
5. The method for driving a display panel according to claim 4,
the preset data signal is at a high level at a first moment, the scanning signal is at a high level at a second moment, and the first moment is earlier than the second moment.
6. The method for driving a display panel according to claim 4,
the preset data signal is at a low level at a third moment, the scanning signal is at a high level at a fourth moment, and the third moment is earlier than the fourth moment.
7. A driving apparatus of a display panel, wherein the display panel comprises a plurality of sub-pixels; the display panel is used for displaying a picture to be displayed; the sub-pixels correspond to pixels in the picture to be displayed; the device comprises:
the gray scale acquisition module is used for acquiring a to-be-displayed gray scale value of the pixel corresponding to each sub-pixel;
the time length obtaining module is used for obtaining a first receiving time length of a preset data signal of a high level and a second receiving time length of the preset data signal of a low level corresponding to the sub-pixel according to the gray scale value to be displayed; wherein the preset data signal has a high level and a low level;
and the input module is used for inputting the preset data signals to the corresponding sub-pixels and respectively inputting high-level scanning signals to the corresponding sub-pixels in the first receiving time length and the second receiving time length so that the corresponding sub-pixels receive the high-level preset data signals in the first receiving time length and the low-level preset data signals in the second receiving time length to display the picture to be displayed.
8. The device according to claim 7, wherein the first receiving duration is longer than the second receiving duration when the gray-scale value to be displayed is larger than a predetermined gray-scale value.
9. The device according to claim 7, wherein the first receiving duration is less than or equal to the second receiving duration when the gray-scale value to be displayed is less than or equal to a preset gray-scale value.
10. The driving apparatus of a display panel according to claim 7,
in the same frame, the input duration of the high-level preset data signal covers the first receiving duration; and the input duration of the low-level preset data signal covers the second receiving duration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811253408.4A CN109285512B (en) | 2018-10-25 | 2018-10-25 | Driving method and device of display panel |
| PCT/CN2018/117035 WO2020082482A1 (en) | 2018-10-25 | 2018-11-22 | Method and device for driving a display panel |
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| CN201811253408.4A CN109285512B (en) | 2018-10-25 | 2018-10-25 | Driving method and device of display panel |
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| JPH01120963A (en) * | 1987-11-04 | 1989-05-12 | Matsushita Electric Ind Co Ltd | Predictive coding device |
| DE10224372A1 (en) * | 2002-05-24 | 2003-12-11 | Jenoptik Automatisierungstech | Code-reading method for applying/reading out encoding of any length on moving material uses a laser beam switched on and off by controlling electronics |
| JP2011154200A (en) * | 2010-01-27 | 2011-08-11 | Sony Corp | Display device, method for driving the same, and electronic equipment |
| TW201312520A (en) * | 2011-09-09 | 2013-03-16 | Ind Tech Res Inst | Pixel structure, hybrid display apparatus, and driving mothod |
| CN106205466A (en) * | 2014-12-18 | 2016-12-07 | 四川虹视显示技术有限公司 | A kind of pixel-driving circuit |
| CN104882109B (en) * | 2015-06-09 | 2017-12-05 | 深圳市华星光电技术有限公司 | The driving method of liquid crystal display panel |
| CN105225627B (en) * | 2015-10-23 | 2018-01-09 | 深圳市华星光电技术有限公司 | A kind of display device and its driving method |
| CN105489185B (en) * | 2016-01-25 | 2017-12-01 | 京东方科技集团股份有限公司 | Drive device, display device and driving method |
| CN105931591B (en) * | 2016-07-06 | 2019-06-25 | 武汉华星光电技术有限公司 | A kind of adjustment method of display panel |
| CN106991972B (en) * | 2017-05-02 | 2019-05-03 | 深圳市华星光电半导体显示技术有限公司 | A kind of booting brightness control method of organic luminous panel |
| CN106920527B (en) * | 2017-05-05 | 2018-02-02 | 惠科股份有限公司 | Driving method and driving device of display panel and display device |
| CN107154239B (en) * | 2017-06-30 | 2019-07-05 | 武汉天马微电子有限公司 | Pixel circuit, driving method, organic light-emitting display panel and display device |
| CN107358914B (en) * | 2017-07-12 | 2019-08-06 | 上海天马有机发光显示技术有限公司 | A kind of emission control circuit, its driving method, display panel and display device |
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