CN114519985A - Pixel charging method and liquid crystal display device - Google Patents
Pixel charging method and liquid crystal display device Download PDFInfo
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- CN114519985A CN114519985A CN202210076474.9A CN202210076474A CN114519985A CN 114519985 A CN114519985 A CN 114519985A CN 202210076474 A CN202210076474 A CN 202210076474A CN 114519985 A CN114519985 A CN 114519985A
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The application discloses a pixel charging method and a liquid crystal display device. The pixel comprises an active element, a liquid crystal capacitor and a storage capacitor; the grid electrode of the active element is connected with a scanning line, the source electrode of the active element is connected with a data line, the drain electrode of the active element is connected with a pixel electrode, the pixel electrode is also connected with one end of the storage capacitor and one end of the liquid crystal capacitor, the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the method comprises the steps of judging whether the scanning line outputs high-level voltage or not; when the scanning line outputs a high-level voltage, the active element is conducted; the data line outputs voltage values in stages in a time period in which the active element is turned on. According to the scheme, in the time period when the active element is conducted, the pixel can quickly reach the target brightness by outputting the voltage in stages, so that the visual brightness difference is eliminated.
Description
Technical Field
The present disclosure relates to the field of liquid crystal display technologies, and in particular, to a pixel charging method and a liquid crystal display device.
Background
The liquid crystal panel displays a display with different brightness due to the rotation of the liquid crystal molecules. The voltages at two ends of each pixel in the liquid crystal panel are different, the liquid crystal in the pixels rotates differently, the light transmission is different, and the brightness is different.
When the liquid crystal display panel is driven, scanning lines in the liquid crystal display panel are opened line by line, when a certain row of scanning lines is opened, control switches T of all pixels connected with the row of scanning lines are opened, and all pixels in the row acquire data signals from correspondingly connected data lines to be charged. The data line will often output a stable voltage value to the pixel for causing the pixel to reach the target brightness during that time period, thereby causing the liquid crystal to rotate to the target position. In practical use, however, the problem that the effective response time of the pixel charging voltage reaching the target voltage is too slow often occurs.
Disclosure of Invention
In order to solve the technical problem that the effective response time of the pixel charging voltage reaching the target voltage is too slow, the embodiment of the application provides a pixel charging method and a liquid crystal display device.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a pixel charging method, wherein the pixel comprises an active element, a liquid crystal capacitor and a storage capacitor; the grid electrode of the active element is connected with a scanning line, the source electrode of the active element is connected with a data line, the drain electrode of the active element is connected with a pixel electrode, the pixel electrode is also connected with one end of the storage capacitor and one end of the liquid crystal capacitor, and the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the method comprises the following steps:
judging whether the scanning line outputs high level voltage or not;
when the scanning line outputs a high-level voltage, the active element is conducted;
the data line outputs voltage values in stages in a time period in which the active element is turned on.
In the foregoing scheme, the outputting the voltage value of the data line in stages in the time period when the active device is turned on includes:
the data line outputs a first voltage value in a first time period when the active element is conducted;
the data line outputs a second voltage value in a second time period when the active element is turned on; the absolute value of the first voltage value is greater than the absolute value of the second voltage value.
In the above scheme, when the voltage value output by the data line connected to each pixel in each row of pixels in the period is a positive value, the first voltage value is greater than the second voltage value; when the voltage value output by the data line connected with each pixel in the row of pixels in the period is a negative value, the first voltage value is smaller than the second voltage value.
In the foregoing solution, the determining the first voltage value includes:
acquiring a gray value displayed by a frame of the pixel and a gray value to be displayed by a current frame of the pixel;
and determining a first voltage value to be output by the data line in the first time period according to the gray value displayed on the previous frame of the pixel and the gray value to be displayed on the current frame of the pixel.
In the above scheme, a sum of a duration of the first period and a duration of the second period is equal to a duration in which the scan line outputs the high level voltage.
In the foregoing solution, dividing the duration of the first time period and the duration of the second time period includes:
acquiring a display effect;
and dividing the duration of the first time period and the duration of the second time period according to the display effect based on the duration of the high-level voltage output by the scanning line.
In the foregoing solution, the dividing, based on the time length of the scan line outputting the high level voltage, the time length of the first time period and the time length of the second time period according to the display effect includes:
judging whether smear is generated during the pixel driving after the duration of the first time period and the duration of the second time period are divided based on the duration of the scanning line outputting high level voltage;
when the pixel is driven, no smear is generated, and the division of the duration of the first period and the duration of the second period is determined to be correct.
In the above scheme, the duration of the first time period is equal to the duration of the second time period.
In the above scheme, the active element includes a thin film transistor or a metal-oxide semiconductor field effect transistor.
The embodiment of the application also provides a liquid crystal display device, which comprises a backlight module and a liquid crystal display panel, wherein pixels in the liquid crystal display panel comprise an active element, a liquid crystal capacitor and a storage capacitor; the gate of the active element is connected with a scanning line, the source of the active element is connected with a data line, the drain of the active element is connected with a pixel electrode, the pixel electrode is further connected with one end of the storage capacitor and one end of the liquid crystal capacitor, the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the pixel is charged through the following steps:
judging whether the scanning line outputs high level voltage or not; when the scanning line outputs a high-level voltage, the active element is conducted; the data line outputs voltage values in stages in a time period in which the active element is turned on.
According to the pixel charging method and the liquid crystal display device, the pixel comprises an active element, a liquid crystal capacitor and a storage capacitor; the grid electrode of the active element is connected with a scanning line, the source electrode of the active element is connected with a data line, the drain electrode of the active element is connected with a pixel electrode, the pixel electrode is also connected with one end of the storage capacitor and one end of the liquid crystal capacitor, and the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the method comprises the following steps: judging whether the scanning line outputs high level voltage or not; when the scanning line outputs a high-level voltage, the active element is conducted; the data line outputs voltage values in stages in a time period in which the active element is turned on. By adopting the scheme provided by the application, the pixel can quickly reach the target brightness by outputting the voltage in stages in the time period when the active element is switched on, so that the visual brightness difference is eliminated.
Drawings
FIG. 1 is a schematic flowchart illustrating a pixel charging method according to a first embodiment of the present disclosure;
FIG. 2 is a schematic flowchart illustrating a pixel charging method according to a first embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a comparison between a pixel charging method and other charging methods according to an embodiment of the present disclosure;
FIG. 4 is a schematic flowchart illustrating a pixel charging method according to a third embodiment of the present application;
FIG. 5 is a schematic flowchart illustrating a pixel charging method according to a fourth embodiment of the present application;
FIG. 6 is a schematic flowchart illustrating a pixel charging method according to a fifth embodiment of the present application;
fig. 7 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present application.
Detailed Description
In order to more clearly explain technical solutions in the embodiments or exemplary techniques of the present application, specific embodiments of the present application will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the present application, and that for a person skilled in the art, other drawings and other embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, the drawings only show schematically the parts relevant to the present application, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically depicted, or only one of them is labeled. In this document, "one" means not only "one but also" a plurality of one ".
The present application will be described in further detail with reference to the accompanying drawings and examples.
The first embodiment:
the embodiment of the application provides a pixel charging method, wherein the pixel comprises an active element, a liquid crystal capacitor and a storage capacitor; the gate of the active element is connected to a scan line, the source of the active element is connected to a data line, the drain of the active element is connected to a pixel electrode, the pixel electrode is further connected to one end of the storage capacitor and one end of the liquid crystal capacitor, and the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected to a common electrode, as shown in fig. 1, the method includes:
step 101: judging whether the scanning line outputs high level voltage or not;
when the scan line outputs a high level voltage, step 102: the active element is turned on;
step 103: the data line outputs voltage values in stages in a time period in which the active element is turned on.
Specifically, the response time is directly related to the electric field formed across the liquid crystal, and the formula of the moment on the liquid crystal molecules is τ ═ ε0(ε//-ε⊥)E2sin (2 θ)/2 is proportional to the square of the electric field, and E ═ U/d, and the electric field is proportional to the voltage difference, and the moment is proportional to the square of the voltage difference. That is, as can be seen from the above, the switching speed and the twist angle of the liquid crystal molecules have a large correlation with the magnitude of the voltage across them. When the voltage at the two ends is larger, the liquid crystal molecules are faster in torsion speed, and when the voltage at the two ends is smaller, the liquid crystal molecules are slower in torsion speed.
Since the pixels are in row units, the scanning lines are charged row by row, and the pixels are charged row by row. The voltage value is output in stages within the time when each row of the pixel is opened, namely within the time period when the active element of the pixel is conducted, so that the pixel can reach the target brightness quickly by taking the charging time of each row as a unit, and the change time span is short, thereby eliminating the visual brightness difference.
Second embodiment:
referring to fig. 2, the step of outputting the voltage value of the data line in a time period in which the active device is turned on includes:
step 201: the data line outputs a first voltage value in a first time period when the active element is conducted;
step 202: the data line outputs a second voltage value in a second time period when the active element is turned on; the absolute value of the first voltage value is greater than the absolute value of the second voltage value.
Here, when a voltage value output by the data line to which each pixel in the each row of pixels is connected in the period is a positive value, the first voltage value is greater than the second voltage value; when the voltage value output by the data line connected with each pixel in the row of pixels in the period is a negative value, the first voltage value is smaller than the second voltage value.
Specifically, when the scan line outputs a high level voltage, the active device is turned on, and the data line outputs different voltage values in two segments. In a first time period, the data line outputs a first voltage value, the electrode voltage value of the liquid crystal capacitor end is changed from V1 to V3, V1 is an initial voltage, and V3 is an overvoltage voltage; in the second time period, the data line outputs a second voltage value, the electrode voltage value of the liquid crystal capacitor terminal is changed from V3 to V2, V3 is an overvoltage voltage, and V2 is a target voltage. The brightness is changed from LV1 to LV2 in the first time period, LV1 is the initial brightness, LV2 is the target brightness, and the response time is the first time period, so that the target brightness can be reached quickly, the visual brightness difference can be reduced, and the display image quality is uniform.
Specifically, the first voltage value is output in the first time period, and the absolute value of the first voltage value is larger than that of the second voltage value, so that the response time is shortened, the pixel can reach the target brightness quickly, and the visual brightness difference is shortened. And outputting a second voltage value in the second time period, so that the pixel can perform normal display under the second voltage value.
Further, referring to fig. 3, when the scan line Gate outputs a high level voltage (i.e., a period T1 in fig. 3), the active element in the pixel is turned on and the data line charges the pixel electrode. In the original design, see data line output curve S-old in FIG. 3. During the whole period T1 when the scan line Gate outputs the high level voltage, the voltage output by the data line remains unchanged as the voltage V1. But in the present application, see the data line output curve S-new in fig. 3. During the whole period T1 when the scan line Gate outputs the high level voltage, the data line outputs the voltage in two segments, the first segment (i.e. the segment T2 in fig. 3) outputs the voltage V2 for accelerating the rotation of the liquid crystal, and the second segment (i.e. the segment T3 in fig. 3) outputs the voltage V1 for making the pixel display the required actual gray scale voltage. In the first period T2, since the voltage value V2 is higher than the voltage value V1, the liquid crystal in the pixel may be rotated to the target position faster. Since the whole process is completed within one line of opening time, the brightness can be completed within one line of opening time to reach the target brightness, thereby realizing the effect of improving the response time.
The response time of the liquid crystal is improved, the uniformity of the display image quality can be ensured, the display image quality is more practical, and the product competitiveness is improved.
The third embodiment:
referring to fig. 4, the determining of the first voltage value includes:
step 401: acquiring a gray value displayed by a frame of the pixel and a gray value to be displayed by a current frame of the pixel;
step 402: and determining a first voltage value to be output by the data line in the first time period according to the gray value displayed on the previous frame of the pixel and the gray value to be displayed on the current frame of the pixel.
In practical application, the first voltage value to be output by the data line in the first time period can be determined through table lookup according to the gray value displayed on the previous frame of the pixel and the gray value to be displayed on the current frame of the pixel.
See table (one) below, in particular. The following table (one) shows the voltage values required for each pixel to improve the response time.
Wherein G (x) (the first column G000 to G255 in the table) represents the gray scale displayed on the pixel in the previous frame, G (y) (the first row G000 to G255 in the table) represents the gray scale displayed on the pixel in the current frame, and Gg (xy) (the first row G000000 to Gg255255 in the table) represents the gray scale voltage currently required for improving the response time. For example, Gg (255255) indicates that the gray scale 255 is displayed on the pixel in the previous frame, and the gray scale 255 is displayed on the pixel in the current frame, then the gray scale voltage corresponding to the improved response time is Gg (255255).
Since the whole process is completed within the on time of one row, the purpose of improving the response time within one row can be realized.
In practical application, the sum of the duration of the first time period and the duration of the second time period is equal to the duration of the high-level voltage output by the scanning line.
The fourth embodiment:
referring to fig. 5, dividing the duration of the first time period and the duration of the second time period includes:
step 501: acquiring a display effect;
step 502: and dividing the duration of the first time period and the duration of the second time period according to a display effect based on the duration of the high level voltage output by the scanning line.
Here, the duration of the first period and the duration of the second period are not necessarily equal, and the duration of the first period and the duration of the second period may be set.
Specifically, in an embodiment, the duration of the first period and the duration of the second period may be divided according to a display effect based on the duration of the scan line outputting the high level voltage.
The duration of the first time period and the duration of the second time period are divided according to the display effect, so that the duration of the first time period and the duration of the second time period can be divided more accurately, and abnormal display caused by wrong division is avoided.
Fifth embodiment:
referring to fig. 6, the dividing the duration of the first period and the duration of the second period according to the display effect based on the duration of the scan line outputting the high level voltage includes:
step 601: judging whether smear is generated during the pixel driving after the duration of the first time period and the duration of the second time period are divided based on the duration of the scanning line outputting high level voltage;
step 602: when the pixel is driven, no smear is generated, and the division of the duration of the first period and the duration of the second period is determined to be correct.
Here, whether the division of the time length of the first period and the time length of the second period is correct is judged by whether the high-speed moving picture has smear. When the high-speed dynamic picture has smear, dividing the duration of the first time period and the duration of the second time period into non-optimal values; when the high-speed dynamic picture has no smear, the duration of the first period and the duration of the second period are divided into the best.
That is, in practical applications, the data driving integrated circuit may select to output different voltage values in different time periods after receiving the timing controller data. For example, in the original design, the timing controller controls the time and voltage of the data line output when the scan line is turned on to be 5V/8us, while in the present embodiment, the timing controller controls the time and voltage of the data line output when the scan line is turned on to be 10V/5us (first period) and 5V/3us (second period), or 10V/6us (first period) and 5V/2us (second period), and so on; the specific value can be determined according to the actual product.
Of course, here, the duration of the first period of time and the duration of the second period of time may be set to be equal.
And judging the division of the duration of the first time period and the duration of the second time period according to whether the high-speed dynamic picture has the smear or not, so that the smear problem can not be generated during pixel driving.
In addition, it should be noted that the first voltage value and the second voltage value may also be set based on the product. In particular, product experimental commissioning may be determined. But it is necessary to ensure that the first voltage value and the second voltage value are within the range that the data line can output.
Further, in an embodiment, the active device includes a thin film transistor or a metal-oxide semiconductor field effect transistor.
According to the pixel charging method provided by the embodiment of the application, the pixel comprises an active element, a liquid crystal capacitor and a storage capacitor; the grid electrode of the active element is connected with a scanning line, the source electrode of the active element is connected with a data line, the drain electrode of the active element is connected with a pixel electrode, the pixel electrode is also connected with one end of the storage capacitor and one end of the liquid crystal capacitor, and the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the method comprises the following steps: judging whether the scanning line outputs high level voltage or not; when the scanning line outputs a high-level voltage, the active element is conducted; the data line outputs voltage values in stages in a time period in which the active element is turned on. By adopting the scheme provided by the application, the pixel can reach the target voltage quickly by outputting the voltage in stages in the time period when the active element is conducted, so that the visual brightness difference is eliminated.
Sixth embodiment:
referring to fig. 7, an embodiment of the present application further provides a liquid crystal display device 700, where the liquid crystal display device 700 includes a backlight module 701 and a liquid crystal display panel 702, and pixels in the liquid crystal display panel 702 are charged through the following steps:
judging whether the scanning line outputs high level voltage or not; when the scanning line outputs a high-level voltage, the active element is conducted; the data line outputs voltage values in stages in a time period in which the active element is turned on.
Specifically, the response time is directly related to the electric field formed across the liquid crystal, and the torque on the liquid crystal molecules is given by the formula τ ═ ε0(ε//-ε⊥)E2sin (2 θ)/2 is proportional to the square of the electric field, and E ═ U/d, and the electric field is proportional to the voltage difference, and the moment is proportional to the square of the voltage difference. That is, as can be seen from the above, the switching speed and the twist angle of the liquid crystal molecules have a large correlation with the magnitude of the voltage across them. When the voltage at the two ends is larger, the liquid crystal molecules are faster in torsion speed, and when the voltage at the two ends is smaller, the liquid crystal molecules are slower in torsion speed.
Since the pixels are in row units, the scanning lines are charged row by row, and the pixels are charged row by row. The voltage value is output in stages within the time when each row of the pixel is opened, namely within the time period when the active element of the pixel is conducted, so that the pixel can reach the target brightness quickly by taking the charging time of each row as a unit, and the change time span is short, thereby eliminating the visual brightness difference.
In one embodiment, the data line outputs a first voltage value in a first time period when the active device is turned on; the data line outputs a second voltage value in a second time period when the active element is turned on; the absolute value of the first voltage value is greater than the absolute value of the second voltage value.
Here, when a voltage value output by the data line to which each pixel in the each row of pixels is connected in the period is a positive value, the first voltage value is greater than the second voltage value; when a voltage value output by the data line to which each of the pixels in the row is connected in the period is a negative value, the first voltage value is smaller than the second voltage value.
Specifically, when the scan line outputs a high level voltage, the active device is turned on, and the data line outputs different voltage values in two segments. In a first time period, the data line outputs a first voltage value, the electrode voltage value of the liquid crystal capacitor end is changed from V1 to V3, V1 is an initial voltage, and V3 is an overvoltage voltage; in the second time period, the data line outputs the second voltage value, the electrode voltage value of the liquid crystal capacitor end is changed from V3 to V2, V3 is an overvoltage voltage, and V2 is a target voltage. The brightness is changed from LV1 to LV2 in the first time period, LV1 is the initial brightness, LV2 is the target brightness, and the response time is the first time period, so that the target brightness can be reached quickly, the visual brightness difference can be reduced, and the display image quality is uniform.
Specifically, the first voltage value is output in the first time period, and the absolute value of the first voltage value is larger than that of the second voltage value, so that the response time is shortened, the pixel can reach the target brightness quickly, and the visual brightness difference is shortened. And outputting a second voltage value in the second time period, so that the pixel can perform normal display under the second voltage value.
In one embodiment, the step of determining the first voltage value includes:
acquiring a gray value displayed by a frame of the pixel and a gray value to be displayed by a current frame of the pixel;
and determining a first voltage value to be output by the data line in the first time period according to the gray value displayed on the previous frame of the pixel and the gray value to be displayed on the current frame of the pixel.
In one embodiment, a sum of a duration of the first period and a duration of the second period is equal to a duration in which the scan line outputs a high level voltage.
In an embodiment, dividing the duration of the first time period and the duration of the second time period includes:
acquiring a display effect;
and dividing the duration of the first time period and the duration of the second time period according to the display effect based on the duration of the high-level voltage output by the scanning line.
In an embodiment, the dividing the duration of the first period and the duration of the second period according to the display effect based on the duration of the scan line outputting the high level voltage includes:
judging whether smear is generated during the pixel driving after the duration of the first time period and the duration of the second time period are divided based on the duration of the high level voltage output by the scanning line;
when the pixel is driven, no smear is generated, and the division of the duration of the first period and the duration of the second period is determined to be correct.
In one embodiment, the duration of the first time period is equal to the duration of the second time period.
In one embodiment, the active device includes a thin film transistor or a metal-oxide semiconductor field effect transistor.
According to the liquid crystal display device provided by the embodiment of the application, the liquid crystal display device comprises a backlight module and a liquid crystal display panel, wherein pixels in the liquid crystal display panel comprise an active element, a liquid crystal capacitor and a storage capacitor; the grid electrode of the active element is connected with a scanning line, the source electrode of the active element is connected with a data line, the drain electrode of the active element is connected with a pixel electrode, the pixel electrode is further connected with one end of the storage capacitor and one end of the liquid crystal capacitor, the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the pixel is charged through the following steps: judging whether the scanning line outputs high level voltage or not; when the scanning line outputs a high-level voltage, the active element is conducted; the data line outputs voltage values in stages in a time period in which the active element is turned on. By adopting the scheme provided by the application, the pixel can reach the target voltage quickly by outputting the voltage in stages in the time period when the active element is conducted, so that the visual brightness difference is eliminated.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A pixel charging method, the pixel includes an active element, a liquid crystal capacitor and a storage capacitor; the gate of the active element is connected with a scanning line, the source of the active element is connected with a data line, the drain of the active element is connected with a pixel electrode, the pixel electrode is further connected with one end of the storage capacitor and one end of the liquid crystal capacitor, and the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the method comprises the following steps:
judging whether the scanning line outputs high level voltage or not;
when the scanning line outputs a high-level voltage, the active element is conducted;
the data line outputs voltage values in stages in a time period in which the active element is turned on.
2. The method of claim 1, wherein the step of outputting the voltage value by the data line in a phase-divided manner during the time period when the active device is turned on comprises:
the data line outputs a first voltage value in a first time period when the active element is conducted;
the data line outputs a second voltage value in a second time period when the active element is turned on; the absolute value of the first voltage value is greater than the absolute value of the second voltage value.
3. The method according to claim 2, wherein when a voltage value output by a data line to which each pixel in each row of pixels is connected in the period is a positive value, the first voltage value is greater than the second voltage value; when the voltage value output by the data line connected with each pixel in the row of pixels in the period is a negative value, the first voltage value is smaller than the second voltage value.
4. The method of claim 2, wherein the step of determining the first voltage value comprises:
acquiring a gray value displayed by a frame of the pixel and a gray value to be displayed by a current frame of the pixel;
and determining a first voltage value to be output by the data line in the first time period according to the gray value displayed on the previous frame of the pixel and the gray value to be displayed on the current frame of the pixel.
5. The method according to claim 2, wherein a sum of a duration of the first period and a duration of the second period is equal to a duration in which the scan line outputs a high level voltage.
6. The method of claim 5, wherein dividing the duration of the first time period and the duration of the second time period comprises:
acquiring a display effect;
and dividing the duration of the first time period and the duration of the second time period according to the display effect based on the duration of the high-level voltage output by the scanning line.
7. The method of claim 6, wherein dividing the duration of the first period and the duration of the second period according to display effect based on the duration of the scan line outputting the high level voltage comprises:
judging whether smear is generated during the pixel driving after the duration of the first time period and the duration of the second time period are divided based on the duration of the scanning line outputting high level voltage;
when the pixel is driven, no smear is generated, and the division of the duration of the first period and the duration of the second period is determined to be correct.
8. The method of claim 2, wherein the duration of the first time period is equal to the duration of the second time period.
9. The method of claim 1, wherein the active element comprises a thin film field effect transistor or a metal-oxide semiconductor field effect transistor.
10. The liquid crystal display device is characterized by comprising a backlight module and a liquid crystal display panel, wherein pixels in the liquid crystal display panel comprise an active element, a liquid crystal capacitor and a storage capacitor; the grid electrode of the active element is connected with a scanning line, the source electrode of the active element is connected with a data line, the drain electrode of the active element is connected with a pixel electrode, the pixel electrode is further connected with one end of the storage capacitor and one end of the liquid crystal capacitor, the other end of the storage capacitor and the other end of the liquid crystal capacitor are connected with a common electrode, and the pixel is charged through the following steps:
judging whether the scanning line outputs high level voltage or not; when the scanning line outputs a high-level voltage, the active element is conducted; the data line outputs voltage values in stages in a time period in which the active element is turned on.
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