CN112951172A - Liquid crystal display device and charging control method - Google Patents
Liquid crystal display device and charging control method Download PDFInfo
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- 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
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Abstract
The application discloses a liquid crystal display device and a charging control method, wherein the liquid crystal display device comprises a liquid crystal panel, a sub-pixel array is arranged in a display area of the liquid crystal panel, and connecting lines respectively corresponding to each row of sub-pixels in the sub-pixel array are arranged in a fan-out area; the driving control unit provides data to be displayed for each sub-pixel in each row of the sub-pixel array through the connecting lines in the fan-out area; the determining unit determines a charging voltage difference value according to gray scale difference values of data to be displayed of each sub-pixel in a row to be charged and displayed data of each sub-pixel in a previous row, and determines a charging compensation coefficient of each sub-pixel in the row to be charged according to the distance from each sub-pixel in the row to be charged to the driving control unit; the charging unit charges each sub-pixel in the row to be charged according to the charging voltage difference value and the charging compensation coefficient so as to display data to be displayed; the display effect of the liquid crystal display device is improved.
Description
Technical Field
The present disclosure relates to liquid crystal displays, and particularly to a liquid crystal display device and a charging control method.
Background
Liquid crystal display devices are widely used because of their advantages of low voltage, low power consumption, long life, no radiation, no pollution, etc.
Currently, in a liquid crystal panel, each pixel in a sub-pixel array of the liquid crystal panel is controlled by a horizontal control line and a vertical data line on a substrate to realize display of an image. The data signal is sent from a driving control unit in the liquid crystal display device, and is generally transmitted to a data line On a substrate by using a Chip On Film (COF); specifically, one COF is connected to a plurality of fan-shaped connection lines of the fan-out region on the substrate via a plurality of connection leads, and then connected to data lines of the display region on the substrate. Because the fan-out area is fan-shaped as a whole, the length of the connecting lines at the two ends of the fan-out area is much longer than that of the connecting lines in the middle of the fan-out area, and therefore the resistance values of the connecting lines at the two ends of the fan-out area are much larger than that of the connecting lines in the middle, so that sub-pixels at the two ends of the display area show the phenomena of bright spots or dark spots and the like, the display is uneven, and the display effect of the liquid crystal display device is.
Disclosure of Invention
The main purpose of the present application is to provide a liquid crystal display device and a charging control method, which aim to solve the problems of the existing liquid crystal display device that the display of the liquid crystal display device is not uniform enough and the display effect is poor due to the fact that the resistance values of the connecting lines at the two ends of the fan-out area are much larger than the impedance of the middle connecting line.
In order to achieve the above object, the present application provides a liquid crystal display device including:
the liquid crystal display panel comprises a display area and a fan-out area, wherein a sub-pixel array is arranged in the display area, and connecting lines corresponding to each row of sub-pixels in the sub-pixel array are arranged in the fan-out area;
the driving control unit is used for providing data to be displayed for each sub-pixel in each row of the sub-pixel array through the connecting lines in the fan-out area;
the first determining unit is used for receiving data to be displayed of each sub-pixel in a row to be charged and determining a charging voltage difference value according to a gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row; wherein each sub-pixel in the previous row has been charged;
the second determining unit is used for determining the charging compensation coefficient of each sub-pixel in the row to be charged according to the distance from each sub-pixel in the row to be charged to the driving control unit;
and the charging unit is used for charging each sub-pixel in the row to be charged according to the charging voltage difference value and the charging compensation coefficient so as to display the data to be displayed.
Optionally, a plurality of data lines and a plurality of control lines are arranged in the display region in a criss-cross manner, and the sub-pixels are located in a region surrounded by the plurality of data lines and the plurality of control lines;
the sub-pixels in the same row in the sub-pixel array are connected to the same control line, and the sub-pixels in the same column in the sub-pixel array are connected to the same data line; each of the data lines is connected to the driving control unit through one of the connection lines in the fan-out region.
Optionally, each row of sub-pixels in the sub-pixel array is a red sub-pixel, a green sub-pixel, and a blue sub-pixel that are periodically and sequentially arranged.
Optionally, the first determining unit is further configured to:
acquiring a gray-scale value of data to be displayed of each sub-pixel in a row to be charged and a gray-scale value of data displayed by each sub-pixel in a previous row;
and respectively calculating gray scale difference values of two sub-pixels positioned in the same row of the row to be charged and the previous row according to the gray scale value of the data to be displayed of each sub-pixel in the row to be charged and the gray scale value of the data displayed by each sub-pixel in the previous row.
Optionally, the first determining unit is further configured to:
acquiring gray scale difference values of data to be displayed of each sub-pixel in the row to be charged and displayed data of each sub-pixel in the previous row;
and if the gray scale difference value is larger than a preset difference threshold value, determining a charging voltage difference value according to the gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row.
Optionally, the first determining unit is further configured to:
acquiring gray scale difference values of data to be displayed of each sub-pixel in the row to be charged and displayed data of each sub-pixel in the previous row;
and determining the charging voltage difference value of each sub-pixel in the row to be charged according to the gray scale difference value and the mapping relation between the preset gray scale difference value and the charging voltage difference value.
Optionally, the second determining unit is further configured to:
acquiring the distance from each sub-pixel in the row to be charged to the drive control unit;
and determining the charging compensation coefficient of each sub-pixel of the row to be charged according to the distance and the mapping relation between the preset distance and the charging compensation coefficient.
Optionally, the second determining unit is further configured to:
acquiring a row identifier corresponding to the row to be charged;
and determining the distance from each sub-pixel in the row to be charged to the drive control unit according to the row identifier and the mapping relation between the preset row identifier and the distance.
Optionally, the charging unit is further configured to:
acquiring an original charging voltage value of data to be displayed of each sub-pixel in a row to be charged;
summing the original charging voltage value and the product of the charging voltage difference value and the charging compensation coefficient to obtain a target charging voltage value;
and charging each sub-pixel in the row to be charged according to the target charging voltage value so as to display the data to be displayed.
Further, in order to achieve the above object, the present application also proposes a charging control method applied to the liquid crystal display device as described above, the charging control method comprising the steps of:
receiving data to be displayed of each sub-pixel in a row to be charged, and determining a charging voltage difference value according to a gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row; wherein each sub-pixel in the previous row has been charged;
determining a charging compensation coefficient of each sub-pixel in the row to be charged according to the distance from each sub-pixel in the row to be charged to the driving control unit;
and charging each sub-pixel in the row to be charged according to the charging voltage difference value and the charging compensation coefficient so as to display the data to be displayed.
The liquid crystal display device according to the present technical solution includes: the liquid crystal display panel comprises a liquid crystal panel, a liquid crystal display panel and a liquid crystal display panel, wherein a sub-pixel array is arranged in a display area of the liquid crystal panel, and connecting lines corresponding to each row of sub-pixels in the sub-pixel array are arranged in a fan-out area of the liquid crystal panel; the driving control unit is used for providing data to be displayed for each sub-pixel in each row of the sub-pixel array through the connecting lines in the fan-out area; the first determining unit is used for receiving data to be displayed of each sub-pixel in a row to be charged and determining a charging voltage difference value according to gray scale difference values of the data to be displayed of each sub-pixel in the row to be charged and displayed data of each sub-pixel in a previous row; wherein each sub-pixel in the previous row has been charged and displays data according to the charging voltage; the second determining unit is used for determining the charging compensation coefficient of each sub-pixel in the row to be charged according to the distance from each sub-pixel in the row to be charged to the driving control unit; the charging unit is used for charging each sub-pixel in the row to be charged according to the charging voltage difference value and the charging compensation coefficient so as to display the data to be displayed. The problem of among the current liquid crystal display device, because the resistance of fan-out area both ends connecting wire is bigger than the resistance of intermediate junction line a lot, lead to liquid crystal display device to show not enough evenly, the display effect is poor is solved.
That is, in the liquid crystal display device according to the technical scheme of the application, the difference of the charging voltages between the sub-pixels in the adjacent rows is considered, so that the phenomenon of poor charging rate caused by large difference of the charging voltages between the sub-pixels in the adjacent rows is avoided; meanwhile, the distances from the sub-pixels in different rows to the driving unit are considered, so that the phenomenon that the charging voltages are different due to different resistance values caused by different distances from the sub-pixels in different rows to the driving unit is avoided; accurate control of the charging voltage of each row of sub-pixels is achieved, so that when charging is carried out according to the charging voltage, each row of sub-pixels can display data to be displayed more uniformly, the uniformity of display of the liquid crystal display device is improved, and the display effect is better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the structures shown in the drawings without any inventive work.
Fig. 1 is a first schematic structural diagram of a liquid crystal display device according to an embodiment of the present application;
FIG. 2 is a second schematic structural diagram of a liquid crystal display device according to an embodiment of the present application;
FIG. 3 is a schematic view of a display area of a liquid crystal display device according to an embodiment of the present application;
FIG. 4-1 is a first schematic diagram illustrating an arrangement of a sub-pixel array according to an embodiment of the present application;
FIG. 4-2 is a second schematic diagram illustrating an arrangement of a sub-pixel array according to an embodiment of the present application;
FIG. 4-3 are schematic diagrams illustrating a third arrangement of a sub-pixel array according to an embodiment of the present application;
fig. 4-4 are schematic diagrams illustrating an arrangement of a sub-pixel array according to an embodiment of the present application;
FIGS. 4-5 are schematic diagrams illustrating an arrangement of a sub-pixel array according to an embodiment of the present application;
FIGS. 4-6 are six schematic arrangements of a sub-pixel array according to an embodiment of the present application;
fig. 5 is a flowchart illustrating a charging control method according to an embodiment of the present application.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
20 | |
| 30 | First determining |
40 | Second determining |
| 50 | |
101 | |
| 102 | Fan- |
10111 | |
| 10112 | |
10113 | |
| 10114 | |
10115 | The |
| 10116 | |
10121 | |
| 10122 | |
10123 | |
| 10124 | |
10125 | |
| 10126 | Sixth control line |
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In order to solve the problems that the resistance of the connecting lines at two ends of the fan-out area is much larger than the impedance of the middle connecting line in the existing liquid crystal display device, so that the liquid crystal display device is not uniform enough and has poor display effect, the embodiment provides the liquid crystal display device.
Referring to fig. 1 and fig. 2, fig. 1 is a first structural schematic diagram of a liquid crystal display device provided in this embodiment, and fig. 2 is a second structural schematic diagram of a liquid crystal panel provided in this embodiment, where the liquid crystal display device includes:
the liquid crystal display device comprises a liquid crystal panel 10, wherein the liquid crystal panel comprises a display area 101 and a fan-out area 102, a sub-pixel array is arranged in the display area 101, and connecting lines corresponding to each row of sub-pixels in the sub-pixel array are arranged in the fan-out area 102;
a driving control unit 20 for providing data to be displayed to each sub-pixel in each row of the sub-pixel array through a connection line in the fan-out region 102;
the first determining unit 30 is configured to receive data to be displayed of each sub-pixel in the row to be charged, and determine a charging voltage difference value according to a gray scale difference value between the data to be displayed of each sub-pixel in the row to be charged and displayed data of each sub-pixel in a previous row; wherein each sub-pixel in the previous row has been charged;
a second determining unit 40, configured to determine a charging compensation coefficient of each sub-pixel in the row to be charged according to a distance from each sub-pixel in the row to be charged to the driving control unit 20;
and the charging unit 50 is configured to charge each sub-pixel in the row to be charged according to the charging voltage difference and the charging compensation coefficient, so as to display the data to be displayed.
It should be noted that the row to be charged in this embodiment refers to the row of sub-pixels currently to be charged in the sub-pixel array; the previous row refers to a row before a row to be charged in the sub-pixel array, wherein the sub-pixels in the previous row are charged and display corresponding data according to the charging voltage; for example, let the sub-pixel array be an array of 6 × 6, where row 1 is charged and row 2 is to be charged, row 2 is to be charged and row 1 is the previous row.
In this embodiment, the liquid crystal panel 10 includes a display region 101 and a fan-out region 102, where the display region 101 is provided with a sub-pixel array, and the fan-out region 102 is provided with a connection line corresponding to each column of sub-pixels in the sub-pixel array in the display region 101; as shown in fig. 2, three connection lines at the left end of the fan-out region 102 are respectively connected to three data lines corresponding to three rows of left sub-pixels in the sub-pixel array of the display region 101, four connection lines in the middle of the fan-out region 102 are respectively connected to four data lines corresponding to four rows of middle sub-pixels in the sub-pixel array of the display region 101, and three connection lines at the right end of the fan-out region 102 are respectively connected to three data lines corresponding to three rows of right sub-pixels in the sub-pixel array of the display region 101.
In this embodiment, due to the characteristics of the fan-out region itself, the lengths of the connecting lines at the left end and the right end of the fan-out region are obviously longer than the length of the connecting line in the middle of the fan-out region, so that the resistances of the connecting lines at the two ends of the fan-out region 102 are much larger than the impedance of the middle connecting line, thereby causing the sub-pixels at the two ends of the sub-pixel array of the display region to present the phenomena of bright spots or dark spots, uneven display, poor display effect, and the like.
In the display region 101 of the present embodiment, a plurality of data lines and a plurality of control lines are arranged in a crisscross manner, and the sub-pixels are located in a region surrounded by the plurality of data lines and the plurality of control lines; specifically, as shown in fig. 3, the display area 101 of the present embodiment is provided with 6 crisscross data lines and 6 control lines, wherein the 6 data lines are respectively denoted as a first data line 10111, a second data line 10112, a third data line 10113, a fourth data line 10114, a fifth data line 10115, and a sixth data line 10116; the 6 control lines are respectively referred to as a first control line 10121, a second control line 10122, a third control line 10123, a fourth control line 10124, a fifth control line 10125 and a sixth control line 10126.
For one sub-pixel, it is located in the area enclosed by two data lines and two control lines; wherein:
the sub-pixels of the same row in the sub-pixel array are connected to the same control line, as shown in fig. 3, the sub-pixels of the first row are connected to a first control line 10121, the sub-pixels of the second row are connected to a second control line 10122, the sub-pixels of the third row are connected to a third control line 10123, the sub-pixels of the fourth row are connected to a fourth control line 10124, the sub-pixels of the fifth row are connected to a fifth control line 10125, the sub-pixels of the sixth row are connected to a sixth control line 10126, and so on.
The sub-pixels of the same column in the sub-pixel array are connected to the same data line, as shown in fig. 3, the sub-pixels of the first column are connected to a first data line 10111, the sub-pixels of the second column are connected to a second data line 10112, the sub-pixels of the third column are connected to a third data line 10113, the sub-pixels of the fourth column are connected to a fourth data line 10114, the sub-pixels of the fifth column are connected to a fifth data line 10115, the sub-pixels of the sixth column are connected to a sixth data line 10116, and so on.
It should be clear that, in the present embodiment, each data line is connected to the driving control unit 20 through one connection line in the fan-out region 102 in a one-to-one correspondence manner, so that the driving control unit 20 is connected to the connection line of the fan-out region 102 on the liquid crystal panel 10 through a connection lead, and then the data to be displayed is transmitted to each sub-pixel connected to the data line through the connection of the connection line and the data line, so that the data to be displayed is displayed by each sub-pixel under the control of the charging voltage.
In some examples, as shown in fig. 4-1, each row in the sub-pixel array is a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel, which are periodically arranged in sequence.
In some examples, as shown in fig. 4-2, each row in the sub-pixel array is a red (R) sub-pixel, a blue (B) sub-pixel, and a green (G) sub-pixel, which are periodically arranged in sequence.
In some examples, as shown in fig. 4-3, each row in the sub-pixel array is a green (G) sub-pixel, a blue (B) sub-pixel, and a red (R) sub-pixel, which are periodically arranged in sequence.
In some examples, as shown in fig. 4-4, each row in the sub-pixel array is a green (G) sub-pixel, a red (R) sub-pixel, and a blue (B) sub-pixel, which are periodically arranged in sequence.
In some examples, as shown in fig. 4-5, each row in the sub-pixel array is a blue (B) sub-pixel, a green (G) sub-pixel, and a red (R) sub-pixel, which are periodically arranged in sequence.
In some examples, as shown in fig. 4-6, each row in the sub-pixel array is a blue (B) sub-pixel, a red (R) sub-pixel, and a green (G) sub-pixel, which are periodically arranged in sequence.
It should be noted that, in practical applications, the sequence of each row of sub-pixels in the sub-pixel array can be flexibly adjusted, and correspondingly, the sequence of each column of sub-pixels can also be flexibly adjusted, which is not described herein again.
In this embodiment, the first determining unit 30 is further configured to:
firstly, acquiring a gray-scale value of data to be displayed of each sub-pixel in a row to be charged and a gray-scale value of data displayed by each sub-pixel in a previous row;
and then, respectively calculating gray scale difference values of two sub-pixels positioned in the same row of the row to be charged and the previous row according to the gray scale value of the data to be displayed of each sub-pixel in the row to be charged and the gray scale value of the data displayed by each sub-pixel in the previous row.
It should be noted that, since the image display of the liquid crystal panel 10 is a charging display performed in a progressive scanning manner, in which each sub-pixel displays a difference in gray scale, i.e., a difference in charging voltage on the data line, the larger the difference in charging voltage on the data line, the more obvious the phenomenon of insufficient charging, i.e., the lower the charging rate. Therefore, in this embodiment, the first determining unit 30 first obtains the gray scale value of the data to be displayed by each sub-pixel in the row to be charged and the gray scale value of the data already displayed by each sub-pixel in the previous row, and then calculates the gray scale difference value between the two sub-pixels in the same column of the row to be charged and the previous row according to the gray scale value of the data to be displayed by each sub-pixel in the row to be charged and the gray scale value of the data already displayed by each sub-pixel in the previous row, so as to obtain the difference value of the charging voltages on the data lines.
For a better understanding, a specific example is described herein; for example, as shown in fig. 5, it is assumed that the row to be charged is the 2 nd row of the sub-pixel array, and correspondingly, the row 1 of the previous row is the 1 st row of the sub-pixel array, and at this time, the gray scale value of the data to be displayed by each sub-pixel in the 2 nd row and the gray scale value of the data already displayed by each sub-pixel in the 1 st row are obtained, so as to calculate the gray scale difference value between the two sub-pixels located in the same column, for example, the gray scale difference value between the data to be displayed by the red sub-pixel in the 1 st row and the data already displayed by the red sub-pixel in the 1 st row and the gray scale difference value between the data to be displayed by the red sub-pixel in the 1 st row and the data to be displayed by the red sub-pixel in the 1 st row in the 2 nd row are calculated; by analogy, gray scale difference values of the data to be displayed of each sub-pixel in the row 2 and the displayed data of each sub-pixel in the row 1 are obtained through calculation respectively.
In this embodiment, the first determining unit 30 is further configured to:
firstly, acquiring gray scale difference values of data to be displayed of each sub-pixel in a row to be charged and displayed data of each sub-pixel in a previous row;
and then, if the gray scale difference value is larger than a preset difference threshold value, determining a charging voltage difference value according to the gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row.
It should be clear that, in this embodiment, the first determining unit 30 may first determine whether the gray scale difference value is greater than a preset difference threshold when the gray scale difference value between the to-be-displayed data of each sub-pixel in the to-be-charged row and the displayed data of each sub-pixel in the previous row is obtained, and if the gray scale difference value is greater than the preset difference threshold, it means that the charging rate is greatly affected, and at this time, the step of determining the charging voltage difference value according to the gray scale difference value between the to-be-displayed data of each sub-pixel in the to-be-charged row and the displayed data of each sub-pixel in the previous row may be performed, so as to avoid the phenomenon of poor charging rate due to a large charging voltage difference between sub-pixels in adjacent rows; accordingly, if the gray level difference value is less than or equal to the preset difference threshold, it means that the influence on the charging rate is small, and the influence on the charging rate does not need to be considered.
For a better understanding, a specific example is described herein; for example, with the above example, it is designed and calculated that the gray scale difference between the data to be displayed on the red sub-pixel in the 1 st row and the data to be displayed on the red sub-pixel in the 1 st row in the 2 nd row is smaller than the preset difference threshold, and then the charging voltage difference value does not need to be determined according to the gray scale difference between the data to be displayed on the red sub-pixel in the 1 st row and the data already displayed on the red sub-pixel in the 1 st row in the 2 nd row; if the gray scale difference between the data to be displayed of the green sub-pixels in the 2 nd row and the 2 nd row of the green sub-pixels in the 1 st row and the data to be displayed of the green sub-pixels in the 2 nd row is greater than the preset difference threshold value, the charging voltage difference value is determined according to the gray scale difference between the data to be displayed of the green sub-pixels in the 2 nd row and the data already displayed of the green sub-pixels in the 2 nd row and the 2 nd row in the 1 st row.
In this embodiment, the first determining unit 30 is further configured to:
firstly, acquiring gray scale difference values of data to be displayed of each sub-pixel in a row to be charged and displayed data of each sub-pixel in a previous row;
and then, determining the charging voltage difference value of each sub-pixel in the row to be charged according to the gray scale difference value and the mapping relation between the preset gray scale difference value and the charging voltage difference value.
It should be clear that, in this embodiment, a mapping relationship between a preset gray scale difference value and a charging voltage difference value is preset, and the mapping relationship is flexibly set by related staff according to experiments or experiences; for example, please refer to table one, which is an exemplary mapping relationship between the preset gray-scale difference and the charging voltage difference.
Watch 1
| Gray scale difference value | Difference of charging voltage |
| a1～a2 | V1 |
| a3～a4 | V2 |
| a5～a6 | V3 |
| a7～a8 | V4 |
| …… | …… |
The first determining unit 30 may find the charging voltage difference value corresponding to the gray scale difference value in the mapping relationship between the preset gray scale difference value and the charging voltage difference value illustrated in table one after obtaining the gray scale difference value between the data to be displayed of each sub-pixel of the row to be charged and the displayed data of each sub-pixel of the previous row.
In this embodiment, the second determining unit 40 is further configured to:
firstly, acquiring the distance from each sub-pixel in a row to be charged to a drive control unit;
and then, determining the charging compensation coefficient of each sub-pixel in the row to be charged according to the distance and the mapping relation between the preset distance and the charging compensation coefficient.
It should be noted that, since the frame display of the liquid crystal panel 10 is the charging display performed in the progressive scanning manner, the distances from the sub-pixels of different rows to the driving control unit are different, which may result in different resistance values, and thus the display uniformity of the liquid crystal display device is affected. Therefore, in this embodiment, the second determining unit 40 first obtains the distance from each sub-pixel in the row to be charged to the driving control unit, and then determines the charging compensation coefficient of each sub-pixel in the row to be charged according to the distance and the mapping relationship between the preset distance and the charging compensation coefficient. In the embodiment, a mapping relation between a preset distance and a charging compensation coefficient is preset, and related workers flexibly set the mapping relation according to experiments or experiences; for example, please refer to table two, which is an exemplary mapping relationship between the preset distance and the charge compensation coefficient.
Watch two
| Distance between two adjacent plates | Coefficient of charge compensation |
| b1～b2 | K1 |
| b3～b4 | K2 |
| b5～b6 | K3 |
| b7～b8 | K4 |
| …… | …… |
The second determining unit 40 may find the charging compensation coefficient corresponding to the distance in the mapping relationship between the preset distance and the charging compensation coefficient illustrated in table two by acquiring the distance between each sub-pixel in the row to be charged and the driving control unit. Specifically, the second determining unit 40 obtains the distance from each sub-pixel in the row to be charged to the driving control unit by obtaining the row identifier corresponding to the row to be charged, and then determines the distance corresponding to the row identifier according to the row identifier and the preset row identifier-distance mapping relationship; in the embodiment, a preset row identifier and distance mapping relationship is preset, and is flexibly set by relevant workers according to experiments or experiences.
In some examples, the distance from each sub-pixel in each row of the sub-pixel array to the drive control unit 20 may be determined with reference to the length of the connection line; for example, if the length of the connecting line corresponding to the 1 st row in the subpixel array is l1, the length of the 1 st row may be l1, l1+ q, or l1-q, where q is an arbitrary value, and so on, and if the length of the connecting line corresponding to the 2 nd row in the subpixel array is l2, the length of the 2 nd row may be l2, l2+ q, or l2-q, where q is an arbitrary value, and so on, so as to generate the preset row identifier and distance mapping relationship. Therefore, the phenomenon that the charging voltage is different due to different resistance values caused by different connecting wires is avoided, and the uniformity of the display of the liquid crystal display device is better.
In some examples, the distance from each sub-pixel in each row of the sub-pixel array to the driving control unit 20 may be determined based on the length of the data line, for example, if the length of the connecting line corresponding to the 1 st row in the sub-pixel array is l1 ', the length of the 1 st row may be l 1' or l1 '+ q or l 1' -q, where q is an arbitrary value, and so on, and if the length of the connecting line corresponding to the 2 nd row in the sub-pixel array is l2 ', the length of the 2 nd row may be l 2' or l2 '+ q or l 2' -q, where q is an arbitrary value, and so on, thereby generating the preset row identification and distance mapping relationship. Therefore, the phenomenon that the charging voltage is different due to different resistance values caused by different data lines is avoided, and the uniformity of the display of the liquid crystal display device is better.
In some examples, the distance from each sub-pixel of each row in the sub-pixel array to the drive control unit 20 may be determined with reference to the common length of the connection line and the data line; for example, if the length of the connection line corresponding to the 1 st row in the subpixel array is l1, and the length of the data line is l1 ', the length of the 1 st row may be l1+ l 1', l1+ l1 '+ q, or l1+ l 1' -q, where q is an arbitrary value, and so on, and if the length of the connection line corresponding to the 2 nd row in the subpixel array is l2, and the length of the data line is l2 ', the length of the 2 nd row may be l2+ l 2', l2+ l2 '+ q, or l2+ l 2' -q, where q is an arbitrary value, and so on, thereby generating the preset row identification and distance mapping relationship. Therefore, the phenomenon that the resistance value is different due to the difference of the connecting wires and the caused charging voltage is different is avoided, the phenomenon that the resistance value is different due to the difference of the data wires and the caused charging voltage is different is also avoided, and the display uniformity of the liquid crystal display device is further better.
In this embodiment, the charging unit 50 is further configured to:
firstly, acquiring each original charging voltage value of data to be displayed of each sub-pixel in a row to be charged;
then, summing the original charging voltage value and the product of the charging voltage value and the charging compensation coefficient to obtain a target charging voltage value;
and then, charging each sub-pixel in the row to be charged according to the target charging voltage value so as to display the data to be displayed.
It should be clear that, in the present embodiment, after the first determining unit 30 determines the charging voltage value of each sub-pixel in the row to be charged and the second determining unit 40 determines the charging compensation coefficient of each sub-pixel in the row to be charged, the charging unit 50 may charge each sub-pixel in the row to be charged according to the charging voltage value and the charging compensation coefficient, so as to display the data to be displayed. Specifically, the charging unit 50 first obtains each original charging voltage value of the data to be displayed of each subpixel in the row to be charged, then adds the original charging voltage value to the product of the charging voltage value and the charging compensation coefficient to obtain a target charging voltage value, and further charges each subpixel in the row to be charged according to the target charging voltage value to display the data to be displayed.
For a better understanding, a specific example is described herein; for example, for the red sub-pixel in the 1 st column of the row to be charged (the 2 nd row), the original charging voltage value is determined to be V0, the charging voltage difference value is V2, and the charging compensation coefficient is K1, then the target charging voltage value is V '0 + V2 × K1, and the red sub-pixel in the 1 st column of the 2 nd row is charged according to the target charging voltage value V', so as to display the data to be displayed; by analogy, each sub-pixel in the row to be charged can be charged, so that the data to be displayed can be displayed.
In the embodiment, the difference of the charging voltages between the sub-pixels in the adjacent rows is considered, so that the phenomenon of poor charging rate caused by large difference of the charging voltages between the sub-pixels in the adjacent rows is avoided; meanwhile, the distances from the sub-pixels in different rows to the driving unit are considered, so that the phenomenon that the charging voltages are different due to different resistance values caused by different distances from the sub-pixels in different rows to the driving unit is avoided; the accurate control of the charging voltage of each row of sub-pixels is realized, so that when the charging is carried out according to the charging voltage, each row of sub-pixels can more uniformly display data to be displayed, the display uniformity of the liquid crystal display device is improved, the display effect is better, the market share is increased, and the popularization and the use are more facilitated.
Based on the foregoing embodiments, a charging control method of the present application is proposed, which is applied to the liquid crystal display device in the foregoing embodiments; fig. 5 is a schematic flow chart of the charging control method according to the present embodiment.
S501: receiving data to be displayed of each sub-pixel in a row to be charged, and determining a charging voltage difference value according to a gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row; wherein each sub-pixel in the previous row has been charged and displays data according to the charging voltage;
s502: determining a charging compensation coefficient of each sub-pixel in the row to be charged according to the distance from each sub-pixel in the row to be charged to the drive control unit;
s503: and charging each sub-pixel in the row to be charged according to the charging voltage difference value and the charging compensation coefficient so as to display the data to be displayed.
In this embodiment, the charging control method at least has all the advantages brought by the technical solutions of the foregoing embodiments, and details are not repeated here.
Based on the foregoing embodiments, a terminal of the present application is proposed, which includes the liquid crystal display device of the foregoing embodiments.
In this embodiment, the terminal may be any terminal including the aforementioned liquid crystal display device. For example, the terminal may be a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a Personal Digital Assistant (PDA), a tablet computer (PAD), a handheld device, a vehicle-mounted device, a wearable device, a computing device, a television, a refrigerator, an air conditioner, and the like.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
The above are only alternative embodiments of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents made by the contents of the specification and the drawings of the present application, or directly/indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. A liquid crystal display device, characterized in that the liquid crystal display device comprises:
the liquid crystal display panel comprises a display area and a fan-out area, wherein a sub-pixel array is arranged in the display area, and connecting lines corresponding to each row of sub-pixels in the sub-pixel array are arranged in the fan-out area;
the driving control unit is used for providing data to be displayed for each sub-pixel in each row of the sub-pixel array through the connecting lines in the fan-out area;
the first determining unit is used for receiving data to be displayed of each sub-pixel in a row to be charged and determining a charging voltage difference value according to a gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row; wherein each sub-pixel in the previous row has been charged;
the second determining unit is used for determining the charging compensation coefficient of each sub-pixel in the row to be charged according to the distance from each sub-pixel in the row to be charged to the driving control unit;
and the charging unit is used for charging each sub-pixel in the row to be charged according to the charging voltage difference value and the charging compensation coefficient so as to display the data to be displayed.
2. The liquid crystal display device according to claim 1, wherein a plurality of data lines and a plurality of control lines are arranged in the display region in a crisscross manner, and the sub-pixels are located in a region surrounded by the plurality of data lines and the plurality of control lines;
the sub-pixels in the same row in the sub-pixel array are connected to the same control line, and the sub-pixels in the same column in the sub-pixel array are connected to the same data line; each of the data lines is connected to the driving control unit through one of the connection lines in the fan-out region.
3. The liquid crystal display device of claim 2, wherein each row of sub-pixels in the sub-pixel array is a red sub-pixel, a green sub-pixel and a blue sub-pixel which are periodically arranged in sequence.
4. The liquid crystal display device according to claim 2, wherein the first determination unit is further configured to:
acquiring a gray-scale value of data to be displayed of each sub-pixel in a row to be charged and a gray-scale value of data displayed by each sub-pixel in a previous row;
and respectively calculating gray scale difference values of two sub-pixels positioned in the same row of the row to be charged and the previous row according to the gray scale value of the data to be displayed of each sub-pixel in the row to be charged and the gray scale value of the data displayed by each sub-pixel in the previous row.
5. The liquid crystal display device according to any one of claims 1 to 4, wherein the first determination unit is further configured to:
acquiring gray scale difference values of data to be displayed of each sub-pixel in the row to be charged and displayed data of each sub-pixel in the previous row;
and if the gray scale difference value is larger than a preset difference threshold value, determining a charging voltage difference value according to the gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row.
6. The liquid crystal display device according to any one of claims 1 to 4, wherein the first determination unit is further configured to:
acquiring gray scale difference values of data to be displayed of each sub-pixel in the row to be charged and displayed data of each sub-pixel in the previous row;
and determining the charging voltage difference value of each sub-pixel in the row to be charged according to the gray scale difference value and the mapping relation between the preset gray scale difference value and the charging voltage difference value.
7. The liquid crystal display device according to any one of claims 2 to 4, wherein the second determination unit is further configured to:
acquiring the distance from each sub-pixel in the row to be charged to the drive control unit;
and determining the charging compensation coefficient of each sub-pixel of the row to be charged according to the distance and the mapping relation between the preset distance and the charging compensation coefficient.
8. The liquid crystal display device according to claim 7, wherein the second determination unit is further configured to:
acquiring a row identifier corresponding to the row to be charged;
and determining the distance from each sub-pixel in the row to be charged to the drive control unit according to the row identifier and the mapping relation between the preset row identifier and the distance.
9. The liquid crystal display device according to any one of claims 1 to 4, wherein the charging unit is further configured to:
acquiring an original charging voltage value of data to be displayed of each sub-pixel in a row to be charged;
summing the original charging voltage value and the product of the charging voltage difference value and the charging compensation coefficient to obtain a target charging voltage value;
and charging each sub-pixel in the row to be charged according to the target charging voltage value so as to display the data to be displayed.
10. A charging control method applied to the liquid crystal display device according to any one of claims 1 to 9, comprising:
receiving data to be displayed of each sub-pixel in a row to be charged, and determining a charging voltage difference value according to a gray scale difference value of the data to be displayed of each sub-pixel in the row to be charged and the displayed data of each sub-pixel in the previous row; wherein each sub-pixel in the previous row has been charged;
determining a charging compensation coefficient of each sub-pixel in the row to be charged according to the distance from each sub-pixel in the row to be charged to the driving control unit;
and charging each sub-pixel in the row to be charged according to the charging voltage difference value and the charging compensation coefficient so as to display the data to be displayed.
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Application publication date: 20210611 |