CN104678626A - Liquid crystal display, driving method thereof and display device - Google Patents
Liquid crystal display, driving method thereof and display device Download PDFInfo
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- CN104678626A CN104678626A CN201510079258.XA CN201510079258A CN104678626A CN 104678626 A CN104678626 A CN 104678626A CN 201510079258 A CN201510079258 A CN 201510079258A CN 104678626 A CN104678626 A CN 104678626A
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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
Abstract
The invention discloses a liquid crystal display, a driving method thereof and a display device. As the liquid crystal display comprises a compensation line which forms a storage capacitor with a common electrode and/or common electrode wires, a compensation signal is determined according to values and polarities of data signals loaded on all data lines by a current source drive, and the determined compensation signal is provided for a compensation module of the compensation line, when voltage changes on the common electrode cannot be offset with each other due to the fact that the polarities of the data signals on the data lines are inversed, the compensation signal applied to the compensation line is determined by the compensation module according to the values and the polarities of the data signals on all the current data lines, and the voltage changes, caused by voltage changes on a pixel electrode, on the common electrode are offset by the voltage changes, caused by the voltage changes on the compensation line, on the common electrode, so that voltage on the common electrode is stable, and the display picture of the liquid crystal display is further prevented from exceptions of flicker, residual images and the like.
Description
Technical field
The present invention relates to display technique field, espespecially a kind of liquid crystal display, its driving method and display device.
Background technology
Along with the development of display technique, liquid crystal display and display of organic electroluminescence rely on its respective advantage to become to have become two of current display field large main products.
Liquid crystal display, by distinguishing on-load voltage to pixel electrode and public electrode, the electric field controls liquid crystal molecule formed between pixel electrode and public electrode rotates, liquid crystal molecule to through backlight modulate, it is made to be irradiated on color rete with different light intensity, color rete is different to the light intensity permeability of different spectral band, and the light finally presenting required color realizes display.
In a liquid crystal display, the display quality how improving liquid crystal display is technical matters urgently to be resolved hurrily.
Summary of the invention
Embodiments provide a kind of liquid crystal display, its driving method and display device, occur the problems such as flicker, image retention and display GTG exception in order to avoid the display frame of liquid crystal display.
Embodiments provide a kind of liquid crystal display, comprise Source drive, display panel and compensating module; Wherein,
Described display panel has public electrode, the public electrode wire to described public electrode signal transmission, some data lines, and forms the compensating line of memory capacitance with described public electrode and/or described public electrode wire;
Described Source drive is used for applying data-signal to each described data line;
The described compensating signal determined for being carried in size and the polarity determination compensating signal of the data-signal on each described data line according to current described Source drive, and is supplied to described compensating line by described compensating module.
Correspondingly, the embodiment of the present invention additionally provides the driving method of any one liquid crystal display above-mentioned, comprising:
Size and the polarity determination compensating signal of the data-signal on each described data line is carried according to current described Source drive;
The described compensating signal determined is supplied to described compensating line.
Correspondingly, the embodiment of the present invention additionally provides a kind of display device, any one liquid crystal display above-mentioned that the embodiment of the present invention provides.
The above-mentioned liquid crystal display that the embodiment of the present invention provides, its driving method and display device, because liquid crystal display includes the compensating line forming memory capacitance with public electrode and/or public electrode wire, and be carried in size and the polarity determination compensating signal of the data-signal on each data line according to current Source drive, and the compensating signal determined is supplied to the compensating module of compensating line.Therefore, when the data-signal on data line reverses in polarity, when the change of the voltage on the public electrode that the change in voltage on pixel electrode is caused can not be cancelled out each other, compensating module can be carried according to current Source drive the compensating signal that the size of the data-signal on each data line and polarity determines to be applied on compensating line, thus the change of voltage on the public electrode that causes to the change in voltage offset on pixel electrode of the change of voltage on the public electrode utilizing the change in voltage on compensating line to cause, to make the voltage stabilization on public electrode, and then there is flicker in the display frame improving liquid crystal display, image retention, and show the problems such as GTG exception.
Accompanying drawing explanation
One of structural representation of the liquid crystal display that Fig. 1 a provides for the embodiment of the present invention;
The structural representation two of the liquid crystal display that Fig. 1 b provides for the embodiment of the present invention;
The structural representation three of the liquid crystal display that Fig. 1 c provides for the embodiment of the present invention;
The structural representation four of the liquid crystal display that Fig. 1 d provides for the embodiment of the present invention;
The structural representation five of the liquid crystal display that Fig. 1 e provides for the embodiment of the present invention;
The structural representation of the compensating module that Fig. 2 provides for the embodiment of the present invention;
The concrete structure schematic diagram of the compensating module that Fig. 3 provides for the embodiment of the present invention;
The structural representation six of the liquid crystal display that Fig. 4 a provides for the embodiment of the present invention;
The structural representation seven of the liquid crystal display that Fig. 4 b provides for the embodiment of the present invention;
The schematic flow sheet of the driving method of the liquid crystal display that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the display device that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Find by analyzing, in available liquid crystal display, if the electric capacity of transistor is larger in liquid crystal display, voltage on pixel electrode is also larger on the impact of the voltage on public electrode, can cause liquid crystal display under specific display frame, the change of the voltage on the public electrode that the data pulse of the voltage on pixel electrode causes can not be cancelled out each other, the voltage on public electrode is made to occur the ripple problems of too raising or reduce, thus there is flicker in the picture that liquid crystal display can be caused to show, image retention, and show the problems such as GTG exception, affect the display quality of liquid crystal display.
Therefore, in view of this, embodiments provide a kind of liquid crystal display, its driving method and display device, occur the problems such as flicker, image retention and display GTG exception in order to avoid the display frame of liquid crystal display.
Below in conjunction with accompanying drawing, the embodiment of liquid crystal display, its driving method and display device that the embodiment of the present invention provides is described in detail.
A kind of liquid crystal display that the embodiment of the present invention provides, as shown in Fig. 1 a to Fig. 1 e, comprises Source drive 1, display panel 2 and compensating module 3; Wherein,
Display panel 2 has public electrode 21, the public electrode wire 22 to public electrode 21 signal transmission, some data line D, and forms the compensating line 23 of memory capacitance with public electrode 21 and/or public electrode wire 22;
Source drive 1 is for applying data-signal to each data line D;
The compensating signal determined for being carried in size and the polarity determination compensating signal of the data-signal on each data line D according to current Source drive 1, and is supplied to compensating line 23 by compensating module 3.
The above-mentioned liquid crystal display that the embodiment of the present invention provides, owing to including the compensating line forming memory capacitance with public electrode and/or public electrode wire, and be carried in size and the polarity determination compensating signal of the data-signal on each data line according to current Source drive, and the compensating signal determined is supplied to the compensating module of compensating line.Therefore, when the data-signal on data line reverses in polarity, when the change of the voltage on the public electrode that the change in voltage on pixel electrode is caused can not be cancelled out each other, compensating module can be carried according to current Source drive the compensating signal that the size of the data-signal on each data line and polarity determines to be applied on compensating line, thus the change of voltage on the public electrode that causes to the change in voltage offset on pixel electrode of the change of voltage on the public electrode utilizing the change in voltage on compensating line to cause, to make the voltage stabilization on public electrode, and then there is flicker in the display frame improving liquid crystal display, image retention, and show the problems such as GTG exception.
Particularly, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Fig. 1 c and Fig. 1 d, compensating line 23 can be arranged in the territory, effective display area (within figure dotted line frame) of display panel 2, or as illustrated in figs. ia and ib, compensating line 23 also can be arranged in the neighboring area (outside figure dotted line frame) of display panel 2, or as shown in fig. le, compensating line 23 also can be arranged in territory, effective display area (within figure dotted line frame) and neighboring area (outside the figure dotted line frame) of display panel 2, as long as ensure that the setting that compensating line 23 can form memory capacitance with public electrode 21 and/or public electrode wire 22 all belongs to protection scope of the present invention, in this no limit.
It should be noted that, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, public electrode can be made up of the monoblock planar structure covering all pixels, can certainly be made up of the block structure of polylith cover part pixel, in this no limit.
In the specific implementation, the above-mentioned compensating module that the embodiment of the present invention provides can be on the same chip integrated with Source drive, also can be integrated on different chips respectively, in this no limit.
Further, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, compensating module determination compensating signal is specially:
The mean value A of the grey decision-making of polarity corresponding to positive data-signal on all data lines and the mean value B of the grey decision-making of polarity corresponding to negative data-signal is applied to according to current, and | A-B|, determines compensating signal; Wherein, the size of compensating signal equals grey decision-making and is | and the magnitude of voltage of signal corresponding during A-B|, if A > is B, then the polarity of compensating signal is negative, if A < is B, then the polarity of compensating signal is just.
It should be noted that, here | A-B| refers to the absolute value of the difference of the mean value A of the grey decision-making of polarity corresponding to positive data-signal and the mean value B of the grey decision-making of polarity corresponding to negative data-signal.In addition, due to grey decision-making be generally on the occasion of, therefore above-mentioned A and B be equally on the occasion of.
Further, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, the mean value A of the grey decision-making of polarity corresponding to positive data-signal on all data lines and the mean value B of the grey decision-making of polarity corresponding to negative data-signal is applied to according to current, when a=b, the change of the voltage on the public electrode that the change in voltage on pixels illustrated electrode causes can be cancelled out each other, do not need compensating line to carry out, therefore now compensating module does not export compensating signal to compensating line.
Preferably, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Figure 2, compensating module 3, specifically can comprise:
Computing module 31, is currently applied to the mean value A of the grey decision-making of polarity corresponding to positive data-signal on all data lines and the mean value B of the grey decision-making of polarity corresponding to negative data-signal for calculating, and | A-B|;
Comparison module 32, for comparing the size of A and B;
Generation module 33, for generating compensating signal according to comparative result and result of calculation, and is supplied to compensating line 23 by the compensating signal of generation; Wherein, the size of compensating signal equals grey decision-making and is | and the magnitude of voltage of signal corresponding during A-B|, when A > B, the polarity of compensating signal is negative, and when A < B, the polarity of compensating signal is just.
Preferably, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Figure 3, generation module 33, specifically can comprise:
Initialize signal generate submodule 331, for basis | A-B| generates initialize signal, and if A > B time, the polarity of initialize signal is just, if during A < B, the polarity of first ringing is negative;
Anti-phase ratio circuit 332, for generating compensating signal according to initialize signal, and is supplied to compensating line 23 by the compensating signal of generation.
Particularly, in the specific implementation, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, according to | A-B| generates initialize signal and is specifically as follows:
Generate according to | A-B| and with size be | the digital signal that the grey decision-making of A-B| is corresponding, and then by digital to analog converter, this digital signal is converted to simulating signal, thus generation initialize signal.
Preferably, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Figure 3, anti-phase ratio circuit 332, specifically can comprise: inverting amplifier 3321, the first resistance R1, the second resistance R2 and the 3rd resistance R3; Wherein,
First resistance R1 is series at initialize signal and generates between submodule 331 and the negative-phase input of inverting amplifier 3321;
Between the negative-phase input that second resistance R2 is series at inverting amplifier 3321 and output terminal;
3rd resistance R3 is series between the normal phase input end of earth terminal and inverting amplifier 3321;
The output terminal of inverting amplifier 3321 is connected with compensating line 23.
Further, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, the Standard resistance range of the first resistance, the second resistance and the 3rd resistance is generally all in a kilo-ohm level, in this no limit.
Further, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, the resistance of the first resistance equals the resistance of the second resistance.The size of such compensating signal just equal the size of initialize signal and size for | the size of the signal corresponding to the grey decision-making of A-B|, namely compensating signal presses the proportional compensation of 1:1, and compensating module need not additionally convert again, can simplify steering logic, reduces development difficulty.
Below be only the concrete structure illustrating anti-phase ratio circuit in liquid crystal display, in the specific implementation, the concrete structure of anti-phase ratio circuit is not limited to the said structure that the embodiment of the present invention provides, and can also be known other structures of those skilled in the art, not limit at this.
Preferably, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Figure 1a, compensating line 23 can be arranged on the side of public electrode 21, or as shown in Figure 1 b, compensating line 23 can be arranged on many sides of public electrode 21, in this no limit, in order to compensate whole public electrode, preferably, as shown in fig. 4 a, compensating line 23 surrounds public electrode 21, and namely compensating line 23 is arranged on every side of public electrode 21.
Further, in the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Fig. 1 a, Fig. 1 b and Fig. 4 b, compensating line 23 can be positioned at outside public electrode wire 22, in this no limit.
In the specific implementation, data line and public electrode are generally positioned at the viewing area of display panel, public electrode wire extends to viewing area by the neighboring area surrounding viewing area and transmits common electrode signal to public electrode, arranging of concrete public electrode and public electrode wire is same as the prior art, does not repeat them here.Therefore, in the specific implementation, because public electrode is positioned at viewing area, compensating line will surround public electrode, compensating line can be arranged on neighboring area.
Further, in the above-mentioned liquid crystal display that inventive embodiments provides, compensating line and data line are set to the same material of same layer.So in the preparation, compensating line and data line can be formed by a patterning processes, thus new preparation technology need not be increased, only need the composition changing corresponding rete to realize, simplify processing step, save production cost, improve production efficiency.
Based on same inventive concept, the embodiment of the present invention additionally provides the driving method of any one liquid crystal display above-mentioned, as shown in Figure 5, can comprise the following steps:
S501, the size being carried in the data-signal on each data line according to current Source drive and polarity determination compensating signal;
S502, the compensating signal determined is supplied to compensating line.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of display device 100, as shown in Figure 6, comprises the above-mentioned liquid crystal display 10 that the embodiment of the present invention provides.This display device can be: any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.The enforcement of this display device see the embodiment of above-mentioned liquid crystal display, can repeat part and repeats no more.
A kind of liquid crystal display that the embodiment of the present invention provides, its driving method and display device, because liquid crystal display includes the compensating line forming memory capacitance with public electrode and/or public electrode wire, and be carried in size and the polarity determination compensating signal of the data-signal on each data line according to current Source drive, and the compensating signal determined is supplied to the compensating module of compensating line.Therefore, when the data-signal on data line reverses in polarity, when the change of the voltage on the public electrode that the change in voltage on pixel electrode is caused can not be cancelled out each other, compensating module can be carried according to current Source drive the compensating signal that the size of the data-signal on each data line and polarity determines to be applied on compensating line, thus the change of voltage on the public electrode that causes to the change in voltage offset on pixel electrode of the change of voltage on the public electrode utilizing the change in voltage on compensating line to cause, to make the voltage stabilization on public electrode, and then there is flicker in the display frame improving liquid crystal display, image retention, and show the problems such as GTG exception.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a liquid crystal display, comprises Source drive, display panel and compensating module; Wherein,
Described display panel has public electrode, the public electrode wire to described public electrode signal transmission, some data lines, and forms the compensating line of memory capacitance with described public electrode and/or described public electrode wire;
Described Source drive is used for applying data-signal to each described data line;
The described compensating signal determined for being carried in size and the polarity determination compensating signal of the data-signal on each described data line according to current described Source drive, and is supplied to described compensating line by described compensating module.
2. liquid crystal display as claimed in claim 1, it is characterized in that, described compensating module determination compensating signal is specially:
The mean value A of the grey decision-making of polarity corresponding to positive data-signal on all data lines and the mean value B of the grey decision-making of polarity corresponding to negative data-signal is applied to according to current, and | A-B|, determines described compensating signal; Wherein, the size of described compensating signal equals grey decision-making and is | and the magnitude of voltage of signal corresponding during A-B|, if A > is B, then the polarity of described compensating signal is negative, if A < is B, then the polarity of described compensating signal is just.
3. liquid crystal display as claimed in claim 2, it is characterized in that, described compensating module, specifically comprises:
Computing module, is currently applied to the mean value A of the grey decision-making of polarity corresponding to positive data-signal on all described data lines and the mean value B of the grey decision-making of polarity corresponding to negative data-signal for calculating, and | A-B|;
Comparison module, for comparing the size of A and B;
Generation module, for generating compensating signal according to comparative result and result of calculation, and is supplied to described compensating line by the compensating signal of generation; Wherein, the size of described compensating signal equals grey decision-making and is | and the magnitude of voltage of signal corresponding during A-B|, when A > B, the polarity of described compensating signal is negative, and when A < B, the polarity of described compensating signal is just.
4. liquid crystal display as claimed in claim 3, it is characterized in that, described generation module, specifically comprises:
Initialize signal generate submodule, for basis | A-B| generates initialize signal, and if A > B time, the polarity of described initialize signal is just, if during A < B, the polarity of described first ringing is negative;
Anti-phase ratio circuit, for generating described compensating signal according to described initialize signal, and is supplied to described compensating line by the compensating signal of generation.
5. liquid crystal display as claimed in claim 4, it is characterized in that, described anti-phase ratio circuit, specifically comprises: inverting amplifier, the first resistance, the second resistance and the 3rd resistance; Wherein,
Described first resistant series generates between submodule and the negative-phase input of described inverting amplifier in described initialize signal;
Described second resistant series is between the negative-phase input and output terminal of described inverting amplifier;
Described 3rd resistant series is between earth terminal and the normal phase input end of described inverting amplifier;
The output terminal of described inverting amplifier is connected with described compensating line.
6. liquid crystal display as claimed in claim 5, it is characterized in that, the resistance of described first resistance equals the resistance of described second resistance.
7. the liquid crystal display as described in any one of claim 1-6, is characterized in that, described compensating line is positioned at the side of described public electrode or surrounds described public electrode; Or
Described compensating line is positioned at outside described public electrode wire.
8. the liquid crystal display as described in any one of claim 1-6, is characterized in that, described compensating line and described data line are set to the same material of same layer.
9. a driving method for the liquid crystal display as described in any one of claim 1-8, comprising:
Size and the polarity determination compensating signal of the data-signal on each described data line is carried according to current described Source drive;
The described compensating signal determined is supplied to described compensating line.
10. a display device, is characterized in that, comprises the liquid crystal display as described in any one of claim 1-8.
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| CN104678626B (en) | 2017-11-17 |
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