CN107591144B - Driving method and driving device of display panel - Google Patents
Driving method and driving device of display panel Download PDFInfo
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- CN107591144B CN107591144B CN201711007739.5A CN201711007739A CN107591144B CN 107591144 B CN107591144 B CN 107591144B CN 201711007739 A CN201711007739 A CN 201711007739A CN 107591144 B CN107591144 B CN 107591144B
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Abstract
The invention discloses a driving method and a driving device of a display panel, wherein the driving method of the display panel comprises the following steps: the method comprises the following steps of interchanging the grid electrodes of two sub-pixels electrically connected on an odd data line or an even data line, wherein the sub-pixels are arranged on the same row, so that the sub-pixels between two adjacent data lines are electrically connected with the same scanning line; and driving the sub-pixels electrically connected with the data lines by using driving voltages with different voltage levels, wherein the polarities of the driving voltages of two adjacent data lines are opposite, so that the polarities of the sub-pixels in two adjacent columns are opposite. By changing the grid routing of the atomic pixels, the polarities of the pixels in two adjacent columns are opposite when 1+2line or 2line data inversion is carried out, so that the flicker phenomenon of the picture is reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method and a driving apparatus for a display panel.
Background
With the accelerated development of a Transistor-Liquid Crystal Display (TFT-LCD), a pixel structure driven by a double gate occurs, which has twice as many scanning lines as a conventional pixel structure, and thus is called a double gate. In addition, two pixels are connected to each data line in the dual-gate-driven pixel structure, so that the number of data lines is reduced by one time compared with the traditional pixel architecture. In order to obtain satisfactory picture quality with this pixel architecture, it is necessary to match with 1+2line or 2line data inversion method. The data inversion mode is that in a preset time, due to the fact that the polarities of two adjacent columns of data in a picture are consistent, a flicker phenomenon can be generated when a large-area bright area in the picture is the same, and therefore a vertical line flicker phenomenon can be generated when the pixel structure driven by the double-gate is in the data inversion mode.
Disclosure of Invention
The invention mainly aims to provide a driving method and a driving device of a display panel, and aims to solve the technical problem that in the prior art, when pixels driven by a double-gate electrode are subjected to 1+2line or 2line data inversion, a picture flickers.
In order to achieve the above object, the present invention provides a driving method of a display panel, the driving method including:
arranging a plurality of pixel units along a first direction on a display panel;
dividing a plurality of pixel units of a display panel into a plurality of pixel unit groups, wherein each pixel unit group comprises two adjacent columns of pixel units, and each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel which are adjacent in a first direction;
the method comprises the following steps of (1) interchanging the grids of two sub-pixels electrically connected on an odd data line or an even data line, wherein the sub-pixels are arranged in the same row;
and driving the sub-pixels electrically connected with the data lines by using driving voltages with different voltage levels, wherein the polarities of the driving voltages of two adjacent data lines are opposite, so that the polarities of the sub-pixels in two adjacent columns are opposite.
In one embodiment, driving the sub-pixels, to which the data lines are electrically connected, with driving voltages having different voltage levels includes:
driving the sub-pixels electrically connected to the odd-numbered data lines with first driving voltages having opposite polarities;
driving the sub-pixels electrically connected to the even-numbered data lines with a second driving voltage having an opposite polarity;
the voltage of the first driving voltage is a preset first voltage level, and the voltage level of the second driving voltage is a preset second voltage level.
Further, the present invention provides a driving device of a display panel, including:
the array module is used for arranging the display panel along a first direction;
the grouping module is used for dividing a plurality of pixel units of the display panel into a plurality of pixel unit groups, each pixel unit group comprises two adjacent columns of pixel units, and each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel which are adjacent in a first direction;
the control module is used for interchanging grids of two adjacent columns of sub-pixels electrically connected to an odd data line or an even data line, and the sub-pixels are arranged in the same row;
and the driving module drives the sub-pixels electrically connected with the data lines by using driving voltages with different voltage grades, and the polarities of the driving voltages of two adjacent data lines are opposite.
In one embodiment, the driving module includes:
the first driving unit drives the sub-pixels electrically connected to the odd-numbered data lines by using first driving voltages with opposite polarities;
the second driving unit drives the sub-pixels electrically connected to the even-numbered data lines by using second driving voltages with opposite polarities;
the voltage of the first driving voltage is a preset first voltage level, and the voltage level of the second driving voltage is a preset second voltage level.
In an embodiment, the driving module makes polarities of two adjacent columns of sub-pixels different.
In one embodiment, the two scanning lines are sequentially arranged along a first direction, and the scanning lines comprise a first scanning line and a second scanning line;
the data lines are sequentially arranged along a second direction and comprise a first data line, a second data line and a third data line;
the two transistors connected to each data line are sequentially a first transistor and a second transistor, the first transistor connected to the first data line and the third data line is connected to the first scan line, and the first transistor connected to the second data line is connected to the second scan line.
In one embodiment, the two scanning lines are sequentially arranged along a first direction, and the scanning lines comprise a first scanning line and a second scanning line;
the data lines are sequentially arranged along a second direction and comprise a first data line, a second data line and a third data line;
the two transistors connected to each data line are sequentially a first transistor and a second transistor, the first transistor connected to the first data line and the third data line is connected to the second scan line, and the first transistor connected to the second data line is connected to the first scan line.
In one embodiment, the two scan lines are sequentially arranged along a first direction, the scan lines include a first scan line and a second scan line, and the sub-pixels are located between the first scan line and the second scan line; and two sub-pixels connected with the same scanning line are respectively and electrically connected with two adjacent data lines.
In one embodiment, two sub-pixels connected to the same data line are located on two sides of the data line.
Further, the present invention provides a driving device including: a display panel; the two scanning lines and the three data lines form four pixel regions, and two adjacent sub-pixels electrically connected with the same scanning line are located in the same pixel region.
The invention changes the grid routing of the atomic pixel, and makes the polarities of the pixels in two adjacent columns opposite when performing 1+2line or 2line data inversion, thereby reducing the flicker phenomenon of the picture.
Drawings
FIG. 1 is a schematic diagram of a driving principle of a display panel;
FIG. 2 is a schematic diagram of an exemplary dual gate driven pixel structure for a plurality of pixel cells;
FIG. 3 is a schematic diagram of an exemplary dual-gate driving scheme for displaying the polarity of a picture in a data inversion scheme of 1+2 lines;
FIG. 4 is a schematic diagram of an exemplary dual-gate driving scheme for displaying image polarities in a 2-line data inversion scheme;
FIG. 5 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a driving apparatus for a display panel according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a driving method of a display panel according to another embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a driving apparatus for a display panel according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a display panel driving apparatus according to another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a driving apparatus for a display panel according to yet another embodiment of the present invention;
FIG. 11 is a schematic diagram of a polarity display of a picture when a 1+2line data inversion scheme is adopted for dual gate driving according to an embodiment of the present invention;
FIG. 12 is a schematic structural diagram of a driving apparatus for a display panel according to still another embodiment of the present invention;
FIG. 13 is a schematic diagram of image polarity display when a 1+2line data inversion scheme is adopted for dual gate driving according to another embodiment of the present invention;
FIG. 14 is a schematic structural diagram of a driving apparatus for a display panel according to another embodiment of the present invention;
fig. 15 is a schematic structural diagram of a display device according to another embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are 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, 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 invention.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a driving principle of a display device 100. The display device includes a pixel array 102, a source driver providing a plurality of source driving channels 104, a gate driver providing a plurality of gate driving channels 106, and a controller 208. The source driving channel 104 is controlled by the controller 208 to output signals through the data lines, and controls the luminance display of the corresponding pixels in the pixel array 102 by matching the scanning lines output by the gate driving channels 106. The source drive channel 104 and the gate drive channel 106 interact to form a plurality of cells as shown in fig. 1. The signals provided by the controller 208 to the source drive channel 104 include polarity inversion signals to determine the polarity of the corresponding pixel. After receiving the polarity inversion signal, the source driving channel 104 generates data voltages with different polarities according to the data line output by the controller 208 and the value of the polarity inversion signal, so as to drive the corresponding pixels. In addition, the value of the polarity inversion signal varies with the timing of the gate driving channel 106, such that the polarity of each adjacent pixel is different.
In the lcd, since the liquid crystal molecules cannot be fixed at a certain voltage all the time, which is determined by the characteristics of the liquid crystal molecules, if the voltage is fixed for too long, the liquid crystal molecules cannot rotate any more due to the change of the electric field because of the destruction of the characteristics, so as to form different gray scales. Therefore, the voltage must be restored at intervals to avoid the characteristic destruction of the liquid crystal molecules, so that the display voltage of the lcd is divided into two polarities, one of positive polarity and the other of negative polarity. When the voltage of the display electrode is higher than the voltage of the common electrode, the display electrode is called as positive polarity, when the voltage of the display electrode is lower than the voltage of the common electrode, the display electrode is called as negative polarity, and whether the voltage of the display electrode is positive polarity or negative polarity, a group of gray scales with the same brightness are formed, so when the absolute value of the voltage difference between the upper layer glass and the lower layer glass is fixed, whether the voltage of the display electrode is high or the voltage of the common electrode is high, the expressed gray scales are the same, but under the two conditions, the turning directions of the liquid crystal molecules are completely opposite, and the characteristic damage caused when the turning directions of the liquid crystal molecules are always fixed in one direction is avoided. That is, when the display screen is still, the display screen can still be kept still by the alternation of different positive and negative polarities, and the liquid crystal molecules are not destroyed, so that the liquid crystal display screen is still, the voltage inside the liquid crystal display screen is continuously changed, and the liquid crystal molecules rotate one side and the other side in the opposite direction continuously.
Referring to fig. 2, fig. 2 is a schematic diagram of an exemplary dual-gate-driven pixel structure of a plurality of pixel units, where a plurality of data lines D1, D2, … DN (N is 1, 2, 3 …), a plurality of scan lines G1, G2, … GM (M is 1, 2, 3 …), each data line (D1, D2, … DN) electrically connects two different sub-pixels 30, two adjacent sub-pixels 30 connect different scan lines (G1, G2, … GM), in this case, data inversion of 1+2line or 2line is performed, a picture with the same polarity of the sub-pixels 30 in two adjacent columns appears, a picture polarity display with the data inversion of 1+2line shown in fig. 3, each data line (D1, D2, … DN) on each row connects two sub-pixels 30, and therefore, after the polarity inversion, the data runs in a zigzag shape, as shown by arrows in two adjacent columns in fig. 3, because the data polarities of two adjacent columns in the picture are the same, the picture polarity display with 2-line data inversion as shown in fig. 4, and because the data polarities of two adjacent columns in the picture are the same, the pixel structure with dual gate driving as shown in fig. 2 generates a vertical line flicker phenomenon when adopting the data inversion method.
Referring to fig. 5, fig. 5 is a flowchart illustrating a driving method of a display panel according to an embodiment of the invention.
In this embodiment, the method for driving a display panel includes the following steps:
a step S10 of arranging a plurality of pixel units in a first direction on the display panel;
step S20, dividing a plurality of pixel units of the display panel into a plurality of pixel unit groups, so that each pixel unit group includes two adjacent columns of pixel units, and each pixel unit includes a first sub-pixel, a second sub-pixel and a third sub-pixel which are adjacent to each other in a first direction;
step S30, interchanging gates of two sub-pixels electrically connected to an odd data line or an even data line, the sub-pixels being arranged in a same row;
step S40, driving the sub-pixels electrically connected with the data lines by using driving voltages with different voltage levels, wherein the polarities of the driving voltages of two adjacent data lines are opposite;
as shown in fig. 6, a plurality of pixel units 20 are arranged in a first direction of a display panel, in this embodiment, taking two pixel units 20 arranged in the first direction as an example, the plurality of pixel units 20 of the display panel are divided into a plurality of pixel unit groups, each pixel unit group includes two adjacent columns of pixel units 20, each pixel unit 20 includes a first sub-pixel 30, a second sub-pixel 30 and a third sub-pixel 30 adjacent to each other in the first direction, each sub-pixel 30 includes a transistor 40, and the first direction is a horizontal direction.
Two scanning lines (G1 and G2) connected to the gate of the transistor 40; and the number of the first and second groups,
three data lines (D1, D2, and D3) connected to the source of the transistor 40;
the method comprises the steps of interchanging gates of sub-pixels 30 of two adjacent columns electrically connected with an odd data line (D1 and D3) or an even data line D2, wherein the sub-pixels 30 are sub-pixels 30 arranged in the same row, each data line (D1, D2 and D3) is respectively and electrically connected with sources of two transistors 40, gates of two transistors 40 electrically connected with the same data line (D1, D2 and D3) are respectively and electrically connected with two adjacent scanning lines (G1 and G2), a pair of first transistors 40 arranged in pairs is arranged between two adjacent data lines (D1, D2 and D3), the pair of first transistors comprises two transistors 40 correspondingly connected with the two adjacent data lines (D1, D2 and D3), and gates of two transistors of the pair of the first transistors are respectively and electrically connected with the same scanning line.
In the present embodiment, the gates of the two transistors 40 between the two adjacent data lines (D1, D2, and D3) are electrically connected to the same scan line (G1 and G2), respectively, and the dual gate driving in this case performs data inversion of 1+2line or 2line, making the polarities of the sub-pixels 30 of the two adjacent columns different, thereby reducing the flicker phenomenon of the screen.
In the present embodiment, two pixel units 20 are arranged laterally, wherein each pixel unit 20 includes three horizontally adjacent sub-pixels 30, such as L1, L2, and L3; the three sub-pixels 30 are R (red), G (green), and B (blue), respectively; the short side of each sub-pixel 30 is substantially parallel to the first direction, and the long side of each sub-pixel 30 is substantially parallel to the second direction; the first direction is perpendicular to the second direction.
The two pixel units 20 are a first pixel unit and a second pixel unit, wherein the first pixel unit includes a first sub-pixel L1, a second sub-pixel L2 and a third sub-pixel L3, respectively; the second pixel unit includes a fourth sub-pixel L4, a fifth sub-pixel L5 and a sixth sub-pixel L6, respectively, wherein the two pixel units 20 preferably include two red sub-pixels, two green sub-pixels and two blue sub-pixels, wherein multiple combinations are possible; the two pixel units 20 may also include any arrangement and combination of color sub-pixels.
The two pixel cells 20 include six transistors 40, such as a transistor T1 of a first sub-pixel L1, a transistor T2 of a second sub-pixel L2, a transistor T3 of a third sub-pixel L3, a transistor T4 of a fourth sub-pixel L4, a transistor T5 of a fifth sub-pixel L5, a transistor T6 of a sixth sub-pixel L6, each transistor 40 including a source, a drain and a gate;
wherein, each data line (D1, D2 and D3) is electrically connected with the sources of two transistors 40 respectively, and three data lines are electrically connected with the sources of six transistors 40, wherein, the transistors 40 electrically connected with different data lines (D1, D2 and D3) are different, namely, the transistor electrically connected with the first data line D1, the transistor electrically connected with the second data line D2 and the transistor electrically connected with the third data line D3 are completely different, thus, the three data lines are electrically connected with the sources of six transistors;
the sub-pixel 30 is located between the two scan lines (G1 and G2).
The two sub-pixels 30 connected to the same scan line (G1 and G2) are electrically connected to the two adjacent data lines, respectively.
Two sub-pixels 30 connected to the same data line (D1, D2, and D3) are spaced at both sides of the data line (D1, D2, and D3), so that one data line is less than before, thereby reducing power consumption of the display panel.
And the gates of two transistors 40 between two adjacent data lines (D1, D2 and D3) are respectively connected to the same scanning line (G1 and G2), so that the data inversion of 1+2line or 2line is performed, the polarities of the sub-pixels 30 in two adjacent columns are different, and the flicker phenomenon of the picture is reduced.
The phenomenon of flicker is a phenomenon in which when you look at the screen of a liquid crystal display, you feel that the screen flickers. It does not intentionally make the display picture flash when it is on or off, but because the gray scale of the displayed picture changes slightly each time the picture is updated, human eyes can feel that the picture is flashing.
The dot inversion polarity inversion method has better effect than other display panels because the dot inversion polarity inversion method has less flicker probability, and the present embodiment achieves the dot inversion effect when performing data inversion of 1+2line or 2line by interchanging two sub-pixels electrically connected to the same data line.
In addition, when the sub-pixel driving is performed, at t, the sub-pixel driving is performed1At time G1 is high, transistors T1, T4 and T5 are turned on simultaneously, and D1 givesL1 carries data, D2 carries data to L4, and D3 carries data to L5. Then at t2At that time, G1 goes low, G2 goes high, T1, T4 and T5 turn off simultaneously, transistors T2, T3 and T6 turn on simultaneously, and D1 gives L2Data is supplied, D2 supplies data to L3, and D3 supplies data to L6, so that driving of two pixel cells is realized.
This embodiment uses the reverse method of "+ - +" as an example, at t1At the moment, the scanning line G1 is turned on, and a gate signal is sent to the transistor gate of the sub-pixel connected to G1;
at t1At this time, "+ - +" polarity signals are input to the sub-pixels connected to the data lines (D1, D2, … DN).
It will be appreciated that each data line on each row is electrically connected to two sub-pixels, at t1At this time, the data of the sub-pixel electrically connected to the data line D1 is in a "Z" shape, and because the polarities of the two adjacent data lines are opposite, a "+++ - - ++" polarity signal is inputted to the sub-pixel electrically connected to the data line D2, the data of the sub-pixel electrically connected to the data line D2 is in a shape symmetrical to the "Z" shape, the polarities of the two adjacent columns of sub-pixels are opposite, and the polarities of the sub-pixels are in a symmetrical shape.
In this embodiment, two sub-pixels 30 connected in each row on an even data line (D2) are switched between the electrically connected scan lines (G1 and G2) of the two sub-pixels 30, so that the gates of two transistors 40 between two adjacent data lines (D1, D2 and D3) are electrically connected to the same scan line (G1 and G2), respectively, and in this case, the dual gate driving performs data inversion of 1+2line or 2line, so that the polarities of the sub-pixels 30 in two adjacent columns are different, thereby reducing the flicker phenomenon of the screen.
It is understood that the display panel includes a plurality of pixel units, two scan lines control the pixel units, and each data line of the same row controls two sub-pixels to display, thereby doubling the scan lines and increasing the response time of the pixel display, and two scan lines control the pixel units, thereby implementing a dual gate driving architecture.
The data lines are a plurality of data lines, the scanning lines are a plurality of scanning lines, the data lines provide driving voltage for the sub-pixels electrically connected with the data lines, the scanning lines conduct the transistors electrically connected with the sub-pixels, the source electrodes of the transistors are electrically connected with the data lines, the grid electrodes of the transistors are electrically connected with the scanning lines, and the drain electrodes of the transistors are connected with the sub-pixels.
Based on the driving structure of the dual-gate of fig. 2, when the polarities of "+ - +" or "+ + + - + + + + + + + + + + + + + + + + + +" are inverted, the polarities of the sub-pixels in two adjacent columns are the same, and the sub-pixels are arranged in the same row by exchanging the gates of the sub-pixels electrically connected with the odd data lines or the even data lines; so that the polarities of the sub-pixels of two adjacent two columns are opposite.
The sub-pixels electrically connected to the data lines are driven by driving voltages of different voltage levels, the driving voltages of two adjacent data lines have opposite polarities, for example, taking the example that a polarity signal of "+ - + + + + +" is inputted to a data line, the gates of the sub-pixels electrically connected to even data lines are interchanged, a polarity signal of "+ - +" is inputted to a data line D1, and a polarity signal of "+ + + + - +" is inputted to a data line D2 due to the opposite polarities of the potentials of the two adjacent data lines, so that the polarities of the sub-pixels of the two adjacent columns are opposite.
It is understood that the driving voltages with different voltage levels can be alternating positive and negative driving voltages, such as "+ - +" or "+ + - +".
In order to further realize the opposite polarity of the sub-pixels in two adjacent columns, in general, in the case of the driving architecture, the same polarity of the sub-pixels in two adjacent columns occurs due to the opposite polarity of the driving voltages of two adjacent data lines, and in the embodiment, the polarities of the sub-pixels in two adjacent columns are opposite by exchanging the gates of the sub-pixels electrically connected with the odd data line or the even data line.
In this embodiment, gate traces of atomic pixels are changed, and when data inversion is performed on 1+2line or 2line, polarities of pixels in two adjacent columns are opposite, so that a flicker phenomenon of a picture is reduced.
Referring to fig. 7, fig. 7 is a flowchart illustrating a driving method of a display panel according to another embodiment of the present invention.
In this embodiment, in the driving method of a display panel, the step S40 includes:
step S401, driving the sub-pixels electrically connected to the odd data lines by using first driving voltages with opposite polarities;
it should be noted that the first driving voltages with opposite polarities may be driving voltages with different polarities, or may be driving voltages with different polarities, and in this embodiment, the driving voltages of "+ - +" or "+++ - +" are taken as an example.
Step S402, driving the sub-pixels electrically connected to the even-numbered data lines by using a second driving voltage with opposite polarity; the voltage of the first driving voltage is a preset first voltage level, and the voltage level of the second driving voltage is a preset second voltage level.
It is understood that the second driving voltages with opposite polarities may be driving voltages with different polarities, or driving voltages with different polarities, and in this embodiment, the driving voltages of "+ - +" or "+++ - +" are taken as examples.
It should be noted that, in the case that the driving voltages input by the odd data lines and the even data lines are opposite in polarity, that is, the odd data lines input "+ - +" driving voltages, the even data lines input "+ + - +" driving voltages, the preset first voltage level may be "+ - +" or "+ + - +", and the preset second voltage level is "+ + + - +" or "+ - +", respectively. For example, when a driving voltage of "+ + - +" is inputted to the data line D1, a driving voltage of "+ + + - +" is inputted to the data line D2, thereby achieving the dot inversion effect.
In this embodiment, the data line is input with "+ - +" or "+ + + - + + + + + +", so as to achieve the effect of dot inversion and improve the user experience.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a driving device according to an embodiment of the present invention, wherein the structural diagram of two adjacent pixel units is shown in the embodiment.
In the present embodiment, the driving device 10 includes:
an arrangement module 11, which arranges a plurality of pixel units along a first direction on a display panel;
the grouping module 12 is configured to divide a plurality of pixel units of the display panel into a plurality of pixel unit groups, so that each pixel unit group includes two adjacent columns of pixel units, and each pixel unit includes a first sub-pixel, a second sub-pixel and a third sub-pixel which are adjacent to each other in a first direction;
the control module 13 is used for interchanging the grids of two adjacent columns of sub-pixels electrically connected to the odd-numbered data line or the even-numbered data line, wherein the sub-pixels are arranged in the same row;
the driving module 14 is configured to drive the sub-pixels electrically connected to the data lines by using driving voltages with different voltage levels, where the polarities of the driving voltages of two adjacent data lines are opposite;
as shown in fig. 6, a plurality of pixel units 20 are arranged in a first direction of a display panel, in this embodiment, taking two pixel units 20 arranged in the first direction as an example, the plurality of pixel units 20 of the display panel are divided into a plurality of pixel unit groups, each pixel unit group includes two adjacent columns of pixel units 20, each pixel unit 20 includes a first sub-pixel 30, a second sub-pixel 30 and a third sub-pixel 30 adjacent to each other in the first direction, each sub-pixel 30 includes a transistor 40, and the first direction is a horizontal direction.
Two scanning lines (G1 and G2) connected to the gate of the transistor 40; and the number of the first and second groups,
four data lines (D1, D2, and D3) connected to the source of the transistor 40;
the method comprises the steps of interchanging gates of sub-pixels 30 of two adjacent columns electrically connected with an odd data line (D1 and D3) or an even data line D2, wherein the sub-pixels 30 are sub-pixels 30 arranged in the same row, each data line (D1, D2 and D3) is respectively and electrically connected with sources of two transistors 40, gates of two transistors 40 electrically connected with the same data line (D1, D2 and D3) are respectively and electrically connected with two adjacent scanning lines (G1 and G2), a pair of first transistors 40 arranged in pairs is arranged between two adjacent data lines (D1, D2 and D3), the pair of first transistors comprises two transistors 40 correspondingly connected with the two adjacent data lines (D1, D2 and D3), and gates of two transistors of the pair of the first transistors are respectively and electrically connected with the same scanning line.
In the present embodiment, the gates of the two transistors 40 between the two adjacent data lines (D1, D2, and D3) are electrically connected to the same scan line (G1 and G2), respectively, and the dual gate driving in this case performs data inversion of 1+2line or 2line, making the polarities of the sub-pixels 30 of the two adjacent columns different, thereby reducing the flicker phenomenon of the screen.
In the present embodiment, two pixel units 20 are arranged laterally, wherein each pixel unit 20 includes three horizontally adjacent sub-pixels 30, such as L1, L2, and L3; the three sub-pixels 30 are R (red), G (green), and B (blue), respectively; the short side of each sub-pixel 30 is substantially parallel to the first direction, and the long side of each sub-pixel 30 is substantially parallel to the second direction; the first direction is perpendicular to the second direction.
The two pixel units 20 are a first pixel unit and a second pixel unit, wherein the first pixel unit includes a first sub-pixel L1, a second sub-pixel L2 and a third sub-pixel L3, respectively; the second pixel unit includes a fourth sub-pixel L4, a fifth sub-pixel L5 and a sixth sub-pixel L6, respectively, wherein the two pixel units 20 preferably include two red sub-pixels, two green sub-pixels and two blue sub-pixels, wherein multiple combinations are possible; the two pixel units 20 may also include any arrangement and combination of color sub-pixels.
The two pixel cells 20 include six transistors 40, such as a transistor T1 of a first sub-pixel L1, a transistor T2 of a second sub-pixel L2, a transistor T3 of a third sub-pixel L3, a transistor T4 of a fourth sub-pixel L4, a transistor T5 of a fifth sub-pixel L5, a transistor T6 of a sixth sub-pixel L6, each transistor 40 including a source, a drain and a gate;
wherein, each data line (D1, D2 and D3) is electrically connected with the sources of two transistors 40 respectively, and three data lines are electrically connected with the sources of six transistors 40, wherein, the transistors 40 electrically connected with different data lines (D1, D2 and D3) are different, namely, the transistor electrically connected with the first data line D1, the transistor electrically connected with the second data line D2 and the transistor electrically connected with the third data line D3 are completely different, thus, the three data lines are electrically connected with the sources of six transistors;
the sub-pixel 30 is located between the two scan lines (G1 and G2).
The two sub-pixels 30 connected to the same scan line (G1 and G2) are electrically connected to the two adjacent data lines, respectively.
Two sub-pixels 30 connected to the same data line (D1, D2, and D3) are spaced at both sides of the data line (D1, D2, and D3), so that one data line is less than before, thereby reducing power consumption of the display panel.
And the gates of two transistors 40 between two adjacent data lines (D1, D2 and D3) are respectively connected to the same scanning line (G1 and G2), so that the data inversion of 1+2line or 2line is performed, the polarities of the sub-pixels 30 in two adjacent columns are different, and the flicker phenomenon of the picture is reduced.
The phenomenon of flicker is a phenomenon in which when you look at the screen of a liquid crystal display, you feel that the screen flickers. It does not intentionally make the display picture flash when it is on or off, but because the gray scale of the displayed picture changes slightly each time the picture is updated, human eyes can feel that the picture is flashing.
The dot inversion polarity inversion method has better effect than other display panels because the dot inversion polarity inversion method has less flicker probability, and the present embodiment achieves the dot inversion effect when performing data inversion of 1+2line or 2line by interchanging two sub-pixels electrically connected to the same data line.
In addition, when the sub-pixel driving is performed, at t, the sub-pixel driving is performed1At the time G1 is high, and transistors T1, T4 and T5 are turned on simultaneously, and at this time, D1 feeds data to L1, D2 feeds data to L4, and D3 feeds data to L5. Then at t2At that time, G1 goes low, G2 goes high, T1, T4 and T5 turn off simultaneously, transistors T2, T3 and T6 turn on simultaneously, and D1 gives L2Data is supplied, D2 supplies data to L3, and D3 supplies data to L6, so that driving of two pixel cells is realized.
This embodiment uses the reverse method of "+ - +" as an example, at t1At the moment, the scanning line G1 is turned on, and a gate signal is sent to the transistor gate of the sub-pixel connected to G1;
at t1At this time, "+ - +" polarity signals are input to the sub-pixels connected to the data lines (D1, D2, … DN).
It will be appreciated that each data line on each row is electrically connected to two sub-pixels, at t1At this time, the data of the sub-pixel electrically connected to the data line D1 is in a "Z" shape, and because the polarities of the two adjacent data lines are opposite, a "+++ - - ++" polarity signal is inputted to the sub-pixel electrically connected to the data line D2, the data of the sub-pixel electrically connected to the data line D2 is in a shape symmetrical to the "Z" shape, the polarities of the two adjacent columns of sub-pixels are opposite, and the polarities of the sub-pixels are in a symmetrical shape.
In this embodiment, two sub-pixels 30 connected in each row on an even data line (D2) are switched between the electrically connected scan lines (G1 and G2) of the two sub-pixels 30, so that the gates of two transistors 40 between two adjacent data lines (D1, D2 and D3) are electrically connected to the same scan line (G1 and G2), respectively, and in this case, the dual gate driving performs data inversion of 1+2line or 2line, so that the polarities of the sub-pixels 30 in two adjacent columns are different, thereby reducing the flicker phenomenon of the screen.
It is understood that the display panel includes a plurality of pixel units, two scan lines control the pixel units, and each data line of the same row controls two sub-pixels to display, thereby doubling the scan lines and increasing the response time of the pixel display, and two scan lines control the pixel units, thereby implementing a dual gate driving architecture.
The data lines are a plurality of data lines, the scanning lines are a plurality of scanning lines, the data lines provide driving voltage for the sub-pixels electrically connected with the data lines, the scanning lines conduct the transistors electrically connected with the sub-pixels, the source electrodes of the transistors are electrically connected with the data lines, the grid electrodes of the transistors are electrically connected with the scanning lines, and the drain electrodes of the transistors are connected with the sub-pixels.
Based on the driving structure of the dual-gate of fig. 2, when the polarities of "+ - +" or "+ + + - + + + + + + + + + + + + + + + + + +" are inverted, the polarities of the sub-pixels in two adjacent columns are the same, and the sub-pixels are arranged in the same row by exchanging the gates of the sub-pixels electrically connected with the odd data lines or the even data lines; so that the polarities of the sub-pixels of two adjacent two columns are opposite. For example, when a polarity signal of "+ - +" is inputted to the data line, the gates of the sub-pixels electrically connected to the even-numbered data lines are interchanged, and a polarity signal of "+ - +" is inputted to the data line D1, and a polarity signal of "+ + + - +" is inputted to the data line D2 due to the opposite polarities of the potentials of the data lines in the two adjacent columns, so that the polarities of the sub-pixels in the two adjacent columns are opposite.
It is understood that the driving voltages with different voltage levels can be alternating positive and negative driving voltages, such as "+ - +" or "+ + - +".
In order to further realize the opposite polarity of the sub-pixels in two adjacent columns, in general, in the case of the driving architecture, the same polarity of the sub-pixels in two adjacent columns occurs due to the opposite polarity of the driving voltages of two adjacent data lines, and in the embodiment, the polarities of the sub-pixels in two adjacent columns are opposite by exchanging the gates of the sub-pixels electrically connected with the odd data line or the even data line.
In this embodiment, gate traces of atomic pixels are changed, and when data inversion is performed on 1+2line or 2line, polarities of pixels in two adjacent columns are opposite, so that a flicker phenomenon of a picture is reduced.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a driving device according to an embodiment of the present invention.
In this embodiment, the driving module 14 specifically includes:
a first driving unit 141 driving the sub-pixels electrically connected to the odd-numbered data lines with first driving voltages having opposite polarities;
it should be noted that the first driving voltages with opposite polarities may be driving voltages with different polarities, or may be driving voltages with different polarities, and in this embodiment, the driving voltages of "+ - +" or "+++ - +" are taken as an example.
A second driving unit 142 for driving the sub-pixels electrically connected to the even-numbered data lines by using a second driving voltage having an opposite polarity;
the voltage of the first driving voltage is a preset first voltage level, and the voltage level of the second driving voltage is a preset second voltage level.
It is understood that the second driving voltages with opposite polarities may be driving voltages with different polarities, or driving voltages with different polarities, and in this embodiment, the driving voltages of "+ - +" or "+++ - +" are taken as examples.
It should be noted that, in the case that the driving voltages input by the odd data lines and the even data lines are opposite in polarity, that is, the odd data lines input "+ - +" driving voltages, the even data lines input "+ + - +" driving voltages, the preset first voltage level may be "+ - +" or "+ + - +", and the preset second voltage level is "+ + + - +" or "+ - +", respectively. For example, when a driving voltage of "+ + - +" is inputted to the data line D1, a driving voltage of "+ + + - +" is inputted to the data line D2, thereby achieving the dot inversion effect.
In this embodiment, the data line is input with "+ - +" or "+ + + + - + +", so as to achieve the effect of dot inversion and improve the user experience.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a driving device according to another embodiment of the present invention. That is, the driving structure of the display panel of this embodiment is that two pixel units 20 in fig. 6 are arranged side by side in sequence as a repeating unit between every two scanning lines (each row of sub-pixels).
In this embodiment, the two transistors 40 connected to each data line (D1, D2, … DN) are sequentially a first transistor 40 and a second transistor 40, the first transistor 40 connected to the first data line D1 and the third data line D3 is connected to the first scan line G1, and the first transistor 40 connected to the second data line D2 is connected to the second scan line G2.
In this embodiment, the scanning lines electrically connecting the two sub-pixels 30 connected to the even-numbered data lines (D2, D4 … DN) in fig. 2 are exchanged, for example, the scanning lines (G1, G2, … GM) of the sub-pixels 30 connected to each row on the D2, D4 … D2n (n is 1, 2, 3 …) are exchanged, so that the pixel structure shown in fig. 6 can be obtained. When the data inversion is "+ - +", G1, G2 and G3 … GM are turned on row by row with the gate signals, and the polarities of the obtained picture are as shown in fig. 11, it can be seen from fig. 11 that there are no two columns of pixels with the same polarity in the picture, and the polarities of the sub-pixels in two adjacent columns are different, thereby achieving the effect of reducing the flicker phenomenon.
It can be understood that, in the present embodiment, the dot inversion effect is achieved by a data inversion method of 1+2line or 2 line.
As can be seen from the above, by interchanging the tracks of the scan lines of the sub-pixels 30 connected to each row on the data lines (D2, D4 … D2n), the flicker phenomenon of the vertical stripe generated when the dual gate driving adopts the data inversion of 1+2line or 2line is reduced without increasing the cost.
Referring to fig. 12, fig. 12 is a schematic structural diagram of a driving device according to still another embodiment of the present invention. That is, the driving structure of the display panel of this embodiment is that two pixel units 20 in fig. 6 are arranged side by side in sequence as a repeating unit between every two scanning lines (each row of sub-pixels).
The two scanning lines (G1 and G2) include a first scanning line G1 and a second scanning line G2 in this order; the three data lines (D1, D2, and D3) include a first data line D1, a second data line D2, and a third data line D3; the two transistors 40 connected to each data line (D1, D2, … DN) are sequentially a first transistor and a second transistor, the first transistor connected to the first data line D1 and the third data line D3 is connected to the second scan line G2, and the first transistor 40 connected to the second data line D2 is connected to the first scan line G1.
In the present embodiment, the scanning lines (G1, G2, … GM) electrically connected to the two sub-pixels 30 connected to each row on the odd-numbered data lines (D1, D3 … DN-1) are interchanged, so that the gates of the two transistors 40 between the two adjacent data lines are electrically connected to the same scanning line, respectively, and when the dual-gate driving in this case performs data inversion of 1+2line or 2line, the polarities of the two adjacent sub-pixels 40 are different, so as to achieve the dot inversion effect, thereby reducing the flicker phenomenon of the screen.
The scanning lines (G1, G2, … GM) electrically connected to the two sub-pixels 40 connected to the odd-numbered data lines (D1, D3 … DN-1) in fig. 2 are interchanged, for example, the traces of the scanning lines (G1, G2, … GM) of the sub-pixels 30 connected to each row on the D1, D3 … D2n +1(n is 1, 2, 3 …) data lines are interchanged, when the data inversion mode is "+ - +", the G1, G2, G3 … GM are turned on line by line with the gate signals, and the obtained picture polarity is as shown in fig. 13, which can be derived from fig. 13 that there are no two adjacent columns of sub-pixels with the same polarity on the picture, thereby achieving the effect of reducing the flicker phenomenon.
As can be seen from the above, by changing the routing of the scanning lines (G1, G2, … GM) of the sub-pixels electrically connected in each row on the data lines (D1, D2, … DN), the flicker phenomenon of the vertical stripe generated when the dual gate driving adopts the data inversion of 1+2line or 2line is reduced without increasing the cost.
Referring to fig. 14, fig. 14 is a schematic structural diagram of another embodiment of the driving device of the present invention. That is, two pixel units 20 are taken as an example between every two scanning lines (each row of sub-pixels) of the display panel of the present embodiment.
In the present embodiment, the two scan lines (G1 and G2) and the three data lines (D1, D2 and D3) form four pixel regions 50, and two adjacent sub-pixels 30 electrically connected to the same scan line (G1 or G2) are located in the same pixel region 50.
The two scan lines are a first scan line G1, a second scan line G2, a first data line D1, a second data line D2, and a third data line D3, and form four pixel regions with the three data lines, namely, a first pixel region 50, a second pixel region 50, a third pixel region 50, and a fourth pixel region 50.
Two sub-pixels L1 and L2 electrically connected to the first data line D1, two sub-pixels L3 and L4 electrically connected to the second data line D2, and two sub-pixels L5 and L6 electrically connected to the third data line D3.
Two sub-pixels L2 and L3 electrically connected to the second scan line G2, and L2 and L3 are electrically connected to two adjacent data lines, i.e., the sub-pixel L2 is electrically connected to the first data line D1, and the sub-pixel L3 is electrically connected to the second data line D2.
The sub-pixels L2 and L3 are located within the same pixel region 50.
Two sub-pixels 30 electrically connected to the same data line (D1, D2, and D3) are located in different pixel regions 50.
As can be seen from the above, when data inversion of 1+2line or 2line is performed, two adjacent sub-pixels 30 electrically connected to the same scan line (G1 or G2) are located in the same pixel region 50, and polarities of the two adjacent sub-pixels 30 are opposite, so that a flicker phenomenon caused by the same polarity of the two adjacent sub-pixels is reduced, and user experience is improved.
In addition, an embodiment of the present invention further provides a display device, which includes the above-mentioned driving device, and the specific structure of the display device refers to the above-mentioned embodiment, such as the display device 100' shown in fig. 15, wherein 40' represents a scan line, such as the scan lines (G1, G2, … GM) shown in fig. 9, 20' represents a data line, such as the data lines (D1, D2, … DN) shown in fig. 9, 30' represents a gate driver, 10' represents a source driver, the gate driver 30' turns on the scan line 40' according to a control signal, and the source driver 10' provides a polarity signal to the data line 20 '.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A method of driving a display panel, the method comprising:
arranging a plurality of pixel units along a first direction on a display panel;
dividing a plurality of pixel units of a display panel into a plurality of pixel unit groups, wherein each pixel unit group comprises two adjacent columns of pixel units, and each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel which are adjacent in a first direction;
the method comprises the following steps of interchanging the grids of two sub-pixels electrically connected with an odd data line or an even data line, wherein the sub-pixels are arranged in the same row, and the grids of transistors between two adjacent data lines are respectively connected with the same scanning line;
and driving the sub-pixels electrically connected with the data lines by using driving voltages with different voltage grades, wherein the polarities of the driving voltages of two adjacent data lines are opposite, so that the polarities of the sub-pixels of two adjacent columns are opposite.
2. The method for driving a display panel according to claim 1, wherein driving the sub-pixels to which the data lines are electrically connected with driving voltages having different voltage levels comprises:
driving the sub-pixels electrically connected to the odd-numbered data lines with first driving voltages having opposite polarities;
driving the sub-pixels electrically connected to the even-numbered data lines with a second driving voltage having an opposite polarity;
the voltage of the first driving voltage is a preset first voltage level, and the voltage level of the second driving voltage is a preset second voltage level.
3. A driving apparatus of a display panel, comprising:
the array module is used for arranging the display panel along a first direction;
the grouping module is used for dividing a plurality of pixel units of the display panel into a plurality of pixel unit groups, each pixel unit group comprises two adjacent columns of pixel units, and each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel which are adjacent in a first direction;
the control module is used for interchanging grids of two adjacent columns of sub-pixels electrically connected to an odd data line or an even data line, the sub-pixels are arranged in the same row, and the grids of the transistors between the two adjacent data lines are respectively connected with the same scanning line;
and the driving module drives the sub-pixels electrically connected with the data lines by using driving voltages with different voltage grades, and the polarities of the driving voltages of two adjacent data lines are opposite.
4. The driving apparatus of a display panel according to claim 3, wherein the driving module comprises:
the first driving unit drives the sub-pixels electrically connected to the odd-numbered data lines by using first driving voltages with opposite polarities;
the second driving unit drives the sub-pixels electrically connected to the even-numbered data lines by using second driving voltages with opposite polarities;
the voltage of the first driving voltage is a preset first voltage level, and the voltage level of the second driving voltage is a preset second voltage level.
5. The driving apparatus of a display panel according to claim 3, wherein the driving module makes polarities of two adjacent columns of the sub-pixels different.
6. The driving apparatus of a display panel according to any one of claims 3 to 5, wherein two scan lines are sequentially arranged in the first direction, the scan lines including a first scan line and a second scan line;
the data lines are sequentially arranged along a second direction and comprise a first data line, a second data line and a third data line;
wherein the two transistors connected to each data line are a first transistor and a second transistor in sequence,
a first transistor connected to the first data line and the third data line is connected to the first scan line, and a first transistor connected to the second data line is connected to the second scan line.
7. The driving apparatus of a display panel according to any one of claims 3 to 5, wherein two scan lines are sequentially arranged in the first direction, the scan lines including a first scan line and a second scan line;
the data lines are sequentially arranged along a second direction and comprise a first data line, a second data line and a third data line;
wherein the two transistors connected to each data line are a first transistor and a second transistor in sequence,
a first transistor connected to the first data line and the third data line is connected to the second scan line, and a first transistor connected to the second data line is connected to the first scan line.
8. The device according to any one of claims 3 to 5, wherein the scan lines include a first scan line and a second scan line, the sub-pixels are located between the first scan line and the second scan line, and two sub-pixels connected to the same scan line are electrically connected to two adjacent data lines, respectively.
9. The driving apparatus of a display panel according to claim 8, wherein two sub-pixels connected to the same data line are disposed on both sides of the data line.
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| CN111679527B (en) * | 2020-06-30 | 2023-04-21 | 上海天马微电子有限公司 | Array substrate, driving method thereof and display device |
| CN112562561A (en) * | 2020-12-01 | 2021-03-26 | 惠科股份有限公司 | Driving device and driving method of display panel and display device |
| CN113421519B (en) * | 2021-07-02 | 2023-03-21 | 北京奕斯伟计算技术股份有限公司 | Driving circuit, driving method, display device, and computer-readable storage medium |
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