CN107507594B - Driving method and device of liquid crystal panel - Google Patents
Driving method and device of liquid crystal panel Download PDFInfo
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- CN107507594B CN107507594B CN201710863193.7A CN201710863193A CN107507594B CN 107507594 B CN107507594 B CN 107507594B CN 201710863193 A CN201710863193 A CN 201710863193A CN 107507594 B CN107507594 B CN 107507594B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010586 diagram Methods 0.000 description 26
- 239000010409 thin film Substances 0.000 description 11
- 230000001934 delay Effects 0.000 description 7
- 230000003111 delayed effect Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The invention provides a driving method of a liquid crystal panel, which is applied to the liquid crystal panel, wherein the liquid crystal panel comprises a plurality of scanning lines, a plurality of data lines and a pixel array, and is characterized in that the method comprises the following steps: the driving device controls the starting time of a scanning line corresponding to each row of pixel units of the pixel array and the starting time of a corresponding data line so as to meet a first preset condition; the driving device is controlled within a preset time length, and a pre-charging voltage is added to a corresponding data line of each row of pixel units of the pixel array so as to meet a second preset condition; the driving device controls the scanning lines and the data lines to drive the pixel array according to the first preset condition and the second preset condition. The embodiment of the invention also provides a driving device of the liquid crystal panel. By adopting the embodiment of the invention, the brightness uniformity of different positions of the liquid crystal panel is improved, and the picture quality of the liquid crystal panel is improved.
Description
Technical Field
The present invention relates to the field of liquid crystal display panel technologies, and in particular, to a method and an apparatus for driving a liquid crystal display panel.
Background
In the current information society, Thin Film Transistor-liquid crystal displays (TFT-LCDs) have been widely used in various aspects of life, including small-sized mobile phones, video cameras, digital cameras, medium-sized notebook computers, desktop computers, large-sized home televisions, large-sized projection equipment, and the like, and have the advantages of being light, Thin, environment-friendly, high-performance, and the like.
The scan lines and the data lines supply power to the thin film transistors of the liquid crystal panel. As shown in a diagram of fig. 1, voltages across the capacitor C1 and the capacitor C2 are scan line voltages of the tft, and voltages across the capacitor C3 and the capacitor C4 are data line voltages of the tft. Due to the delay effect of the RC circuit, when a voltage is input from a scan line voltage source and a data line voltage source to a transistor of the liquid crystal panel, there is a delay from the voltage input to the voltage stabilization. On the liquid crystal panel, the power supply delay of the transistors of each row gradually increases from left to right, and the power supply delay of the transistors of each column also gradually increases from top to bottom.
The following therefore occurs: referring to fig. 1, a diagram b is a schematic diagram of the scan lines and the data lines corresponding to the tfts in the upper left area of the lcd panel. As can be seen from fig. b, neither the scanning line nor the data line corresponding to the tft in the upper left region of the liquid crystal panel is delayed, and the pixel voltage written in the tft in this region is correct. Referring to fig. 1, a diagram c is a schematic diagram of the scan lines and the data lines corresponding to the tfts in the upper right region of the lcd panel. As can be seen from fig. c, the data line corresponding to the tft in the upper right region of the liquid crystal panel is not delayed, but the scan line is delayed, which may cause the pixel voltage written into the tft in the region to be incorrect and generate the problem of mis-charging because the tft in the region is not turned off and the data line is already switched to the pixel voltage of the next scan line. Referring to fig. 1, which is a schematic diagram of scan lines and data lines corresponding to the thin film transistors in the lower left region of the liquid crystal panel. As can be seen from fig. d, the scan line corresponding to the tft in the lower left region of the liquid crystal panel is not delayed, but the data line is delayed, which may cause the pixel voltage of the tft in the region to be correct but may have a problem of insufficient charging because the pixel voltage of the tft in the data line is still corresponding to the off scan line. Referring to fig. 1, a diagram e is a schematic diagram of the scanning lines and the data lines corresponding to the thin film transistors in the lower right region of the liquid crystal panel. As can be seen from fig. d, the scanning lines and the data lines corresponding to the thin film transistors in the lower right region of the liquid crystal panel are both delayed, and the thin film transistors in this region may be erroneously charged or insufficiently charged. The problem of the wrong or insufficient voltage of the thin film transistor of the liquid crystal panel can cause the uneven brightness of the liquid crystal panel and affect the picture quality of the liquid crystal panel.
Disclosure of Invention
The invention aims to provide a driving method and a driving device of a liquid crystal panel, which are beneficial to solving the problem of the mischarging or insufficient charging of the voltage of a thin film transistor of the liquid crystal panel, improving the brightness uniformity of the liquid crystal panel and improving the picture quality of the liquid crystal panel.
In a first aspect, an embodiment of the present invention provides a method for driving a liquid crystal panel, where the method is applied to the liquid crystal panel, the liquid crystal panel includes a plurality of scan lines, a plurality of data lines, and a pixel array, and the method includes:
the driving device controls the starting time of a scanning line corresponding to each row of pixel units of the pixel array and the starting time of a corresponding data line so as to meet a first preset condition;
the driving device is controlled within a preset time length, and a pre-charging voltage is added to a corresponding data line of each row of pixel units of the pixel array so as to meet a second preset condition;
the driving device controls the scanning lines and the data lines to drive the pixel array according to the first preset condition and the second preset condition.
In a possible embodiment, the first preset condition is:
the relative delay of the turn-on time of the pixel unit A is smaller than that of the turn-on time of the previous pixel unit adjacent to the pixel unit A; the relative delay of the starting time of the pixel unit A is larger than the relative delay of the starting time of the next pixel unit adjacent to the pixel unit A;
the pixel unit A is any one of the pixel units of each row except the first one and the last one; the relative delay of the starting time is the difference value of the starting time of the scanning line corresponding to the pixel unit and the starting time of the data line corresponding to the scanning line.
In a possible embodiment, the relative delay of the turn-on instant of the previous pixel unit adjacent to the pixel unit a, the relative delay of the turn-on instant of the pixel unit a and the relative delay of the turn-on instant of the pixel unit a are in an equal difference array;
wherein the tolerance of the arithmetic progression is less than 0.
In a possible embodiment, of the relative delays of the turn-on times corresponding to the q-th row of pixel cells of the pixel array, the relative delays of the turn-on times corresponding to some consecutive pixel cells are equal;
the q-th row of pixel units is any row of the pixel array.
In a possible embodiment, the second preset condition is:
from top to bottom, the absolute value of the increased precharge voltage value of the data line of the pixel cell B is greater than the absolute value of the increased precharge voltage value of the data line of the previous pixel cell adjacent to the pixel cell B, and the absolute value of the increased precharge voltage value of the data line of the pixel cell B is less than the absolute value of the increased precharge voltage value of the data line of the next pixel cell adjacent to the pixel cell B;
the pixel unit B is any one of the pixel units of each column except for the first one and the last one.
In one possible embodiment, the absolute value of the increased precharge voltage value of the data line of the previous pixel cell adjacent to the pixel cell B, the absolute value of the increased precharge voltage value of the data line of the pixel cell B, and the absolute value of the increased precharge voltage value of the data line of the next pixel cell adjacent to the pixel cell B are in an equal series of differences;
the tolerance of the arithmetic progression is greater than 0.
In a possible embodiment, among the absolute values of the precharge voltage values of the data lines corresponding to the pixel units in the p-th column of the pixel array, the absolute values of the precharge voltage values of the data lines corresponding to some consecutive pixel units are equal;
the pixel unit of the p-th row is any column of the pixel array.
In a second aspect, an embodiment of the present invention provides a driving apparatus for a liquid crystal panel, where the driving apparatus is applied to the liquid crystal panel, the liquid crystal panel includes scan lines, data lines, and a pixel array, and includes:
the driving device is electrically connected with the scanning line and the data line respectively, and the scanning line and the data line are both electrically connected with the pixel array;
the drive means for carrying out all or part of the method of claims 1-7.
In a possible embodiment, the driving device is a driving chip or a driving circuit.
In a third aspect, an embodiment of the present invention provides a liquid crystal display device, including a liquid crystal display device body, a liquid crystal panel, and the driving device according to any one of claims 18 or 9, wherein the liquid crystal display device body is electrically connected to the liquid crystal display panel, and the liquid crystal panel is electrically connected to the driving device.
It can be seen that, in the solution of the embodiment of the present invention, for the problem that the delay of the turn-on time of the scan line corresponding to the pixel unit in each row of the pixel array gradually increases from left to right, and the relative delay of the turn-on time of the scan line corresponding to the pixel unit in each row and the turn-on time of the data line corresponding to the pixel unit in each row gradually increases from left to right, and finally the pixel voltage on the pixel unit is wrong, the driving device controls the relative delays of the turn-on time of the scan line corresponding to the pixel unit in each row and the turn-on time of the data line corresponding to the pixel unit in each row to sequentially decrease from left to right, so that the turn-on time of the scan line corresponding to the pixel unit in each row and the turn-on time of the data line corresponding to keep the same, and the problem of pixel voltage; in order to solve the problem that the voltage of the corresponding data line of the pixel unit of each column of the pixel array is gradually reduced from top to bottom, so that the pixel voltage of the pixel unit is insufficient, the driving device increases the precharge voltage which is gradually increased from top to bottom on the corresponding data line of the pixel unit of each column of the pixel array, so that the pixel voltage of the pixel unit of each column of the pixel array is sufficient. Compared with the prior art, the method is beneficial to solving the problem of the wrong charging or insufficient charging of the voltage of the pixel unit (namely the thin film transistor) of the liquid crystal panel, improves the brightness uniformity of different positions of the liquid crystal panel and improves the picture quality of the liquid crystal panel.
Drawings
To more clearly illustrate the structural features and effects of the present invention, a detailed description is given below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of a liquid crystal panel and a schematic diagram of scanning lines and data lines of the liquid crystal panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a liquid crystal panel according to an embodiment of the present invention;
FIG. 3 is a schematic view of a liquid crystal display panel according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of scanning lines and data lines of a q-th row of pixel units of a pixel array on a liquid crystal panel;
FIG. 5 is a schematic view of a pixel array according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of scanning lines and data lines of a p-th column of pixel units of a pixel array on a liquid crystal panel;
FIG. 7 is a schematic view of a pixel array according to an embodiment of the present invention;
fig. 8 is a schematic diagram of data lines and scan lines of each pixel unit in a pixel array on a liquid crystal panel.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The drawings are for illustrative purposes only and are merely schematic representations, not intended to limit the present patent.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a liquid crystal panel according to an embodiment of the present invention. As shown in fig. 2, the liquid crystal panel includes a liquid crystal panel 200 and a driving device 201, and the liquid crystal panel 200 includes data lines 202, scan lines 203, and a pixel array 204. The driving device 201 controls the data lines 202 and the scan lines 203 to supply power to the pixel array. The pixel array 204 includes m × n pixel units, and for convenience of illustration, only the pixel units are illustrated as rectangles.
The data lines 202 and the scan lines 203 are located on different layers of the liquid crystal panel, and the data lines 202 and the scan lines 203 are insulated from each other by an insulating layer. In the solution of the embodiment of the present invention, the plurality of scan lines 203 are horizontally disposed and arranged at intervals in the vertical direction, and the plurality of data lines 292 are vertically disposed and arranged at intervals in the horizontal direction.
For convenience of description, the scanning lines (Gate lines, GL)203 are numbered, wherein the scanning lines 203 are named as a first scanning Line GL (1), a second scanning Line GL (2), a third scanning Line GL (2), …, an m-2 th scanning Line GL (m-2), an (m-1) th scanning Line GL (m-1), and an (m) th scanning Line GL (m) in sequence from top to bottom, where m is the number of the scanning lines 203 and m is a positive integer. Similarly, the Data Lines (DL) 202 are numbered, wherein the Data lines 202 are named as a first Data Line DL (1), a second Data Line DL (2), a third Data Line DL (3), …, an (n-3) th Data Line DL (n-3), an (n-2) th Data Line DL (n-2), an (n-1) th Data Line DL (n-1), and an nth Data Line DL (n) in order from left to right, wherein n is the number of the plurality of Data lines 202, and n is a positive integer.
Referring to fig. 3, fig. 3 is a schematic flow chart of a driving method of a liquid crystal panel according to an embodiment of the present invention. As shown in fig. 3, the method includes:
s301, the driving device of the liquid crystal panel controls the turn-on time of the scan line corresponding to each row of the pixel units of the pixel array and the turn-on time of the corresponding data line to satisfy a first preset condition.
Wherein the first precondition specifically comprises:
the relative delay of the turn-on time of the pixel unit A is smaller than the relative delay of the turn-on time of the previous pixel unit adjacent to the pixel unit A; the relative delay of the starting time of the pixel unit A is larger than the relative delay of the starting time of the next pixel unit adjacent to the pixel unit A;
the pixel unit A is any one of the pixel units of each row except the first one and the last one; the relative delay of the starting time is the difference between the starting time of the scanning line corresponding to the pixel unit and the starting time of the data line corresponding to the scanning line.
In a possible embodiment, the relative delay of the turn-on time of the previous pixel unit adjacent to the pixel unit a, the relative delay of the turn-on time of the pixel unit a and the relative delay of the turn-on time of the pixel unit a are in an arithmetic series, and the tolerance of the arithmetic series is less than 0;
the pixel unit a is any one of the pixel units except the first and last pixel units in each row.
The tolerance value of the arithmetic progression is related to the equivalent resistance R and the equivalent capacitance C of the pixel unit. The tolerance value may be equal to 5 times the time constant τ, which is RC, but may also be equal to other values.
For example, referring to fig. 4, fig. 4 is a schematic diagram of scanning lines and data lines of a q-th row of pixel units of a pixel array on a liquid crystal panel. In the figure, the solid lines represent scanning lines, and the broken lines represent data lines. As shown in fig. 4, a1 is a schematic diagram of the scan line and the data line on the first pixel cell in the row, and as can be seen from a1 in fig. 4, the relative delay t1 of the turn-on time of the pixel cell is that the voltage value of the data line is V1. Fig. b1 is a schematic diagram of the scan line and the data line on the second pixel unit in the row, and as can be seen from fig. b1 in fig. 4, the relative delay of the turn-on time of the pixel unit is t2, and the voltage value of the data line is V2. Fig. c1 is a schematic diagram of the scan line and the data line on the nth (i.e. the last) pixel cell in the row, and as can be seen from fig. c1 in fig. 4, the relative delay of the turn-on time of the pixel cell is tn, and the voltage value of the data line is Vn.
It should be noted that the voltage value of the data line can be understood as the charging voltage of the pixel unit.
Wherein, V1-V2- … -Vn means that the voltages of the data lines of the q-th row of pixel cells are all equal, and V1, V2, … and Vn are all greater than 0. T1> t2> … > tn, and t1, t2, …, tn are arithmetic progression, when the tolerance of the arithmetic progression is less than 0.
In a possible embodiment, the relative delay of the turn-on time corresponding to a part of the consecutive pixel units is equal in the relative delay of the turn-on time corresponding to the q-th row of pixel units of the pixel array, where the q-th row of pixel units is any one row of the pixel array.
For example, assume that the number of pixel cells in a row of the pixel array is 10, and the relative delays of the turn-on time corresponding to the pixel cells in the 4 th row of the pixel array are t1, t2, t3, t4, t5, t6, t7, t8, t9, and t10, respectively. The magnitude relationship between t, t, t, t, t, t and t may be t, t, t > t > t, t, t, and other magnitude relationships.
In a possible embodiment, the relative delays of the turn-on timings of the pixel units in the first predetermined area of the pixel array are equal.
For example, referring to fig. 5, fig. 5 is a schematic diagram of a pixel array according to an embodiment of the invention. As shown in fig. 5, the pixel array includes 7 × 9 pixel units. The delay of the on time of the pixel cell in the region 501 is equal, the delay of the on time of the pixel cell in the region 502 is equal, the delay of the on time of the pixel cell in the region 503 is equal, and the delay of the on time of the pixel cell in the region 504 is equal.
It should be noted that the area 501, the area 502, the area 503 and the area 504 are only the first preset area for explaining the embodiment of the present invention, and are not limited to the embodiment of the present invention.
S302, the driving device is controlled within a preset time length, and a pre-charging voltage is added to the corresponding data line of each row of pixel units of the pixel array so as to meet a second preset condition.
The starting time of the preset time length is the starting time of the data line, and the ending time of the preset time length is greater than the starting time of the scanning line and less than the closing time of the scanning line and the closing time of the data line.
Wherein the second preset condition is:
from top to bottom, the absolute value of the increased precharge voltage value of the data line of the pixel unit B is greater than the absolute value of the increased precharge voltage value of the data line of the previous pixel unit adjacent to the pixel unit B, and the absolute value of the increased precharge voltage value of the data line of the pixel unit B is less than the absolute value of the increased precharge voltage value of the data line of the next pixel unit adjacent to the pixel unit B;
the pixel unit B is any one of the pixel units of each column except for the first and last pixel units.
In a possible embodiment, the absolute value of the increased precharge voltage value of the data line of the previous pixel unit adjacent to the pixel unit B, the absolute value of the increased precharge voltage value of the data line of the pixel unit B, and the absolute value of the increased precharge voltage value of the data line of the next pixel unit adjacent to the pixel unit B are in an arithmetic series, and the tolerance of the arithmetic series is greater than 0.
For example, referring to fig. 6, fig. 6 is a schematic diagram of a scanning line and a data line of a p-th column of pixel units of a pixel array on a liquid crystal panel. In the figure, the solid lines represent scanning lines, and the broken lines represent data lines. As shown in fig. 6, a2 is a schematic diagram of the scan line and the data line on the first pixel cell in the p-th column, as can be seen from a2 in fig. 6, the absolute value of the added precharge voltage value of the data line of the first pixel cell in the p-th column is V1OD, the data line voltage value of the pixel cell is V1, and the relative delay of the turn-on time of the pixel cell is t 1. Fig. b2 of fig. 6 is a schematic diagram of the scan line and the data line on the second pixel cell in the P-th column, and as can be seen from fig. b2 of fig. 6, the absolute value of the precharge voltage value added to the data line of the second pixel cell in the P-th column is V2OD, the data line voltage value of the pixel cell is V2, and the relative delay at the turn-on time is t 2. Fig. c2 is a schematic diagram of the scan lines and data lines in the mth (i.e., last) pixel unit in the pth column, and as can be seen from fig. c2 in fig. 6, the absolute value of the precharge voltage value added to the data line of the pixel unit is VmOD, the data line voltage value of the pixel unit is Vm, and the relative delay at the turn-on time is tm.
Wherein V1OD < V2OD < … < VmOD, and V1OD, V2OD, … and VmOD are arithmetic progression, and the tolerance of the arithmetic progression is greater than 0. V1-V2- … -Vm, i.e., the voltages of the data lines of the pixel cells in the p-th column are all equal, and t 1-t 2- … -tm, i.e., the relative delays at the turn-on times of the pixel cells in the p-th column are equal.
In a possible example, the absolute values of the precharge voltage values of the data lines corresponding to the pixel cells in the p-th column of the pixel array are equal to the absolute values of the precharge voltage values of the data lines corresponding to some consecutive pixel cells, where the pixel cells in the p-th column are in any column of the pixel array.
For example, when the number of the pixel cells in one column of the pixel array is 8, the absolute values of the precharge voltage values of the data lines corresponding to the pixel cells in the 3 rd column of the pixel array are V1OD, V2OD, V3OD, V4OD, V5OD, V6OD, V7OD, and V8OD, respectively. The above-mentioned size relationship of V1OD, V2OD, V3OD, V4OD, V5OD, V6OD, V7OD, and V8OD may be V1OD ═ V2OD ═ V3OD < V4OD < V5OD ═ V6OD ═ V7OD < V8OD, or V1OD < V2OD < V3OD ═ V4OD ═ V5OD < V6OD ═ V7OD < V8OD, or other size relationships, but it may be satisfied that precharge voltage values of two equal data lines in V1OD, V2OD, V3OD, V4OD, V5OD, V6OD, V7OD, and V8OD are adjacent.
In a possible embodiment, the absolute values of the precharge voltage values of the data lines corresponding to the pixel units in the second predetermined area in the pixel array are equal.
For example, referring to fig. 7, fig. 7 is a schematic diagram of a pixel array according to an embodiment of the invention. As shown in fig. 7, the pixel array includes 8 × 8 pixel units. The precharge voltage values of the data lines corresponding to the pixel cells in the region 701 are equal, the precharge voltage values of the data lines corresponding to the pixel cells in the region 702 are equal, and the precharge voltage values of the data lines corresponding to the pixel cells in the region 703 are equal.
It should be noted that the above-mentioned area 701, the area 702 and the area 703 are only the second preset area for explaining the embodiment of the present invention, and are not limited to the embodiment of the present invention.
It should be noted that the voltage of the data line is an alternating voltage, and the above-mentioned description of step S302 is directed to a precharge voltage in which the positive half period of the voltage (alternating voltage) of the data line is increased. For the absolute value of the increased precharge voltage value of the data line corresponding to the pixel unit on each column of the pixel array, the change trend of the increased precharge voltage value of the data line in the positive half period of the voltage is consistent, which can be specifically referred to the related description of step S302.
And S303, the driving device controls the scanning lines and the data lines to drive the pixel array according to the first preset condition and the second preset condition.
For each row of pixel units of the pixel array, the driving device controls the scan lines and the data lines to supply power according to the method in the step S301; for each column of pixel units of the pixel array, the driving device controls the scan lines and the data lines to supply power according to the method in step S302.
It is to be noted that the pixel unit can be understood as a thin film transistor in the liquid crystal panel.
For example, referring to fig. 8, fig. 8 is a schematic diagram of a data line and a scan line of each pixel unit in a pixel array on a liquid crystal panel. In the figure, the solid lines represent scanning lines, and the broken lines represent data lines. As shown in fig. 8, the relative delay of the turn-on time of the pixel cells in each row of the pixel array decreases from left to right, which is specifically described in the related description of step S301, and will not be described herein, and the increased precharge voltage value of the pixel cells in each column of the pixel array increases from top to bottom, which is specifically described in the related description of step S302, and will not be described herein.
It can be seen that, in the solution of the embodiment of the present invention, for the problem that the delay of the turn-on time of the scan line corresponding to the pixel unit in each row of the pixel array gradually increases from left to right, and the relative delay of the turn-on time of the scan line corresponding to the pixel unit in each row and the turn-on time of the data line corresponding to the pixel unit in each row gradually increases from left to right, and finally the pixel voltage on the pixel unit is wrong, the driving device controls the relative delays of the turn-on time of the scan line corresponding to the pixel unit in each row and the turn-on time of the data line corresponding to the pixel unit in each row to sequentially decrease from left to right, so that the turn-on time of the scan line corresponding to the pixel unit in each row and the turn-on time of the data line corresponding to keep the same, and the problem of pixel voltage; in order to solve the problem that the voltage of the corresponding data line of the pixel unit of each column of the pixel array is gradually reduced from top to bottom, so that the pixel voltage of the pixel unit is insufficient, the driving device increases the precharge voltage which is gradually increased from top to bottom on the corresponding data line of the pixel unit of each column of the pixel array, so that the pixel voltage of the pixel unit of each column of the pixel array is sufficient. Compared with the prior art, the method is beneficial to solving the problem of the wrong charging or insufficient charging of the voltage of the pixel unit (namely the thin film transistor) of the liquid crystal panel, improves the brightness uniformity of different positions of the liquid crystal panel and improves the picture quality of the liquid crystal panel.
The embodiment of the present invention further provides a driving apparatus 201 for a liquid crystal panel, which is applied to the liquid crystal panel, where the liquid crystal panel includes a scan line 203, a data line 202, and a pixel array 204, and includes:
the driving device 201 is electrically connected to the scanning lines 203 and the data lines 202, respectively, and the scanning lines 203 and the data lines 202 are electrically connected to the pixel array 204;
the above-mentioned drive means 201 for carrying out all or part of the method according to claims 1-7.
The embodiment of the invention further provides a liquid crystal display device 900, the liquid crystal display device 900 comprises a liquid crystal display device body 910 and the liquid crystal display panel 200, and the liquid crystal display device body 910 is electrically connected with the liquid crystal display panel 200.
The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (6)
1. A driving method of a liquid crystal panel, the method being applied to the liquid crystal panel, the liquid crystal panel including a plurality of scanning lines, a plurality of data lines, and a pixel array, the method comprising:
the driving device controls the starting time of a scanning line corresponding to each row of pixel units of the pixel array and the starting time of a corresponding data line so as to meet a first preset condition;
the driving device is controlled within a preset time length, and a pre-charging voltage is added to a corresponding data line of each row of pixel units of the pixel array so as to meet a second preset condition;
the driving device controls the scanning lines and the data lines to drive the pixel array according to the first preset condition and the second preset condition;
wherein the first preset condition is as follows:
the relative delay of the turn-on time of the pixel unit A is smaller than that of the turn-on time of the previous pixel unit adjacent to the pixel unit A; the relative delay of the starting time of the pixel unit A is larger than the relative delay of the starting time of the next pixel unit adjacent to the pixel unit A;
the pixel unit A is any one of the pixel units of each row except the first one and the last one; the relative delay of the starting time is the difference value of the starting time of the scanning line corresponding to the pixel unit and the starting time of the data line corresponding to the scanning line;
the second preset condition is as follows:
from top to bottom, the absolute value of the increased precharge voltage value of the data line of the pixel cell B is greater than the absolute value of the increased precharge voltage value of the data line of the previous pixel cell adjacent to the pixel cell B, and the absolute value of the increased precharge voltage value of the data line of the pixel cell B is less than the absolute value of the increased precharge voltage value of the data line of the next pixel cell adjacent to the pixel cell B;
the pixel unit B is any one of the pixel units of each column except for the first one and the last one.
2. The method of claim 1,
the relative delay of the starting time of the previous pixel unit adjacent to the pixel unit A, the relative delay of the starting time of the pixel unit A and the relative delay of the starting time of the next pixel unit adjacent to the pixel unit A form an arithmetic progression;
wherein the tolerance of the arithmetic progression is less than 0.
3. The method of claim 1,
the absolute value of the added precharge voltage value of the data line of the last pixel unit adjacent to the pixel unit B, the absolute value of the added precharge voltage value of the data line of the pixel unit B and the absolute value of the added precharge voltage value of the data line of the next pixel unit adjacent to the pixel unit B form an equal difference array;
the tolerance of the arithmetic progression is greater than 0.
4. A driving apparatus of a liquid crystal panel, the driving apparatus being applied to the liquid crystal panel, the liquid crystal panel including scanning lines, data lines, and a pixel array, comprising:
the driving device is electrically connected with the scanning line and the data line respectively, and the scanning line and the data line are both electrically connected with the pixel array;
the drive means for performing the method of any one of claims 1-3.
5. The driving apparatus as claimed in claim 4, wherein the driving apparatus is a driving chip or a driving circuit.
6. A liquid crystal display device comprising a liquid crystal display device body, a liquid crystal panel and the driving device according to claim 4 or 5, wherein the liquid crystal display device body is electrically connected to the liquid crystal panel, and the liquid crystal panel is electrically connected to the driving device.
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| TWI645396B (en) * | 2018-03-07 | 2018-12-21 | 友達光電股份有限公司 | Display panel and associated precharging method |
| CN108399905B (en) * | 2018-05-03 | 2020-07-28 | 深圳市华星光电技术有限公司 | Display driving circuit and display driving method |
| CN109192161A (en) * | 2018-10-08 | 2019-01-11 | 惠科股份有限公司 | Display driving method and device and display device |
| CN111489710B (en) * | 2019-01-25 | 2021-08-06 | 合肥鑫晟光电科技有限公司 | Driving method of display device, driver and display device |
| TWI790780B (en) * | 2021-10-19 | 2023-01-21 | 大陸商常州欣盛半導體技術股份有限公司 | Timing control method using pulse frequency modulation, timing controller and display device |
| TWI781796B (en) * | 2021-10-19 | 2022-10-21 | 大陸商常州欣盛半導體技術股份有限公司 | Timing control method using pulse width modulation, timing controller and display device |
| CN113870809B (en) * | 2021-10-19 | 2022-08-16 | 常州欣盛半导体技术股份有限公司 | Pulse frequency modulation time sequence control method, time sequence controller and display device |
| CN113643672B (en) * | 2021-10-19 | 2022-02-15 | 常州欣盛半导体技术股份有限公司 | Multi-pulse frequency modulation timing sequence control method, timing sequence controller and display device thereof |
| CN113990237A (en) * | 2021-11-02 | 2022-01-28 | Tcl华星光电技术有限公司 | Pixel charging method and display panel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007256916A (en) * | 2006-03-20 | 2007-10-04 | Lg Phillips Lcd Co Ltd | Liquid crystal display device and method of driving same |
| CN104317086A (en) * | 2014-11-14 | 2015-01-28 | 深圳市华星光电技术有限公司 | Method for driving liquid crystal display panel |
-
2017
- 2017-09-21 CN CN201710863193.7A patent/CN107507594B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007256916A (en) * | 2006-03-20 | 2007-10-04 | Lg Phillips Lcd Co Ltd | Liquid crystal display device and method of driving same |
| CN104317086A (en) * | 2014-11-14 | 2015-01-28 | 深圳市华星光电技术有限公司 | Method for driving liquid crystal display panel |
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