CN102637415B - Liquid crystal display device and drive method thereof - Google Patents
Liquid crystal display device and drive method thereof Download PDFInfo
- Publication number
- CN102637415B CN102637415B CN201110207466.5A CN201110207466A CN102637415B CN 102637415 B CN102637415 B CN 102637415B CN 201110207466 A CN201110207466 A CN 201110207466A CN 102637415 B CN102637415 B CN 102637415B
- Authority
- CN
- China
- Prior art keywords
- signal
- data
- data line
- pixel electrode
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a liquid crystal display device and a drive method thereof, relating to the technical field of a liquid crystal display. The drive method comprises the following steps of: in the first stage of the theory writing period of the display data of a pixel electrode, outputting a display data signal to the pixel electrode of the current charge line through a data line; and in the second stage of the theory writing period of the display data of the pixel electrode, cutting the connection between the data line and the pixel electrode of the current charge line, and then applying a reference voltage signal to the data line so that the potential of the data line reaches the reference voltage, wherein the difference between the reference voltage and the public voltage output by a public voltage circuit is within a preset range. Through the invention, the image display quality of the liquid crystal display device can be improved.
Description
Technical field
The present invention relates to LCD Technology field, be specifically related to a kind of liquid crystal indicator and driving method thereof.
Background technology
The advantages such as Thin Film Transistor-LCD (TFT-LCD) has frivolous, and the little portability of power consumption is strong, are widely used in TV, on computer and other display equipment.
As shown in Figure 1, it comprises a liquid crystal panel 14, the common electric voltage circuit 15 of common electric voltage is provided for controlling the gate drivers 13 of this liquid crystal panel 14 and the time schedule controller 12 and of source electrode driver 11, this gate drivers 13 of control and source electrode driver 14 its structural representation of conventional thin film transistor liquid crystal display.This liquid crystal panel 14 comprises the public pressure wire 145 of gate line 143 and and the spaced set parallel with gate line 143 of many parallel spaced sets, many and the vertically disposed data line 141 of gate line 143, and a plurality of sub-pixel unit 142 being defined by gate line 143 and data line 141 intersections.This sub-pixel unit 142 comprises thin film transistor (TFT) 1421, one pixel electrodes and a public electrode (thin film transistor (TFT) 1421 is only shown in figure).Thin film transistor (TFT) 1421 comprises a grid, one source pole and a drain electrode, is connected to respectively gate line 143, data line 141 and this pixel electrode.This pixel electrode, public electrode and the liquid crystal layer being sandwiched between the two form a liquid crystal capacitance C2; This pixel electrode, public pressure wire 145 and insulation course between the two form a memory capacitance C1.
Except liquid crystal capacitance C2 and memory capacitance C1, also there are a large amount of stray capacitances in Thin Film Transistor-LCD, as stray capacitance between the stray capacitance between the gate-source parasitic capacitance between film crystal tube grid and source electrode, grid and drain electrode, data line and public electrode etc.Wherein the stray capacitance between data line and public electrode will cause data line and public electrode to produce capacitive coupling effect, and the voltage that causes public electrode is offset with respect to the common electric voltage of common electric voltage circuit output.Under some picture, this coupling effect can be exaggerated, the problems such as to crosstalk appear in the image that causes showing, green pair and flicker (Flicker).Liquid crystal indicator based on traditional structure and type of drive is difficult to avoid the problems referred to above.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of liquid crystal indicator and driving method thereof, in order to improve the image displaying quality of liquid crystal indicator.
For solving the problems of the technologies described above, the invention provides scheme as follows:
A driving method for liquid crystal indicator, described liquid crystal indicator comprises common electric voltage circuit, gate line, data line, a plurality of sub-pixel unit being defined by gate line and data line intersection; Described sub-pixel unit comprise pixel electrode and with the public electrode of the corresponding setting of described pixel electrode, described public electrode is connected with common electric voltage circuit; Described driving method comprises:
First stage in the theoretical write cycle of the demonstration data of pixel electrode, by described data line, display data signal is exported to the pixel electrode of current charging row;
And, subordinate phase in the theoretical write cycle of the demonstration data of pixel electrode, disconnect being connected of pixel electrode of described data line and current charging row, then on described data line, apply reference voltage signal, so that the current potential of described data line reaches a reference voltage, wherein, the difference of the common electric voltage of described reference voltage and the output of described common electric voltage circuit is in a preset range.
Preferably, in above-mentioned driving method,
Described sub-pixel unit also comprises a thin film transistor (TFT), and the grid of described thin film transistor (TFT), source electrode and leakage level are connected with corresponding gate line, data line and pixel electrode respectively;
The described pixel electrode that exports display data signal to current charging row by described data line comprises:
The described thin film transistor (TFT) of the current charging row of conducting, is connected by described thin film transistor (TFT) is corresponding to control the pixel electrode of described data line and current charging row;
Output display data-signal on described data line, so that described voltage to the capable pixel electrode of inductive charging is charged to current potential corresponding to described display data signal.
Preferably, in above-mentioned driving method,
In described subordinate phase, further by the described thin film transistor (TFT) of the current charging row of cut-off, to disconnect being connected of pixel electrode of described data line and current charging row.
Preferably, in above-mentioned driving method, described reference voltage equals the common electric voltage of described common electric voltage circuit output.
The present invention also provides a kind of liquid crystal indicator, comprises common electric voltage circuit, gate line, data line, a plurality of sub-pixel unit being defined by gate line and data line intersection; Described sub-pixel unit comprise pixel electrode and with the public electrode of the corresponding setting of described pixel electrode, described public electrode is connected with common electric voltage circuit;
Described liquid crystal indicator also comprises:
Control of Electric potentials unit, the first stage for the theoretical write cycle of the demonstration data at pixel electrode, exports display data signal to by described data line the pixel electrode of current charging row; And, subordinate phase in the theoretical write cycle of the demonstration data of pixel electrode, disconnect being connected of pixel electrode of described data line and current charging row, then on described data line, apply reference voltage signal, so that the current potential of described data line reaches a reference voltage, wherein, the difference of the common electric voltage of described reference voltage and the output of described common electric voltage circuit is in a preset range.
Preferably, in above-mentioned liquid crystal indicator, described sub-pixel unit also comprises a thin film transistor (TFT), and the grid of described thin film transistor (TFT), source electrode and leakage level are connected with corresponding gate line, data line and pixel electrode respectively; Described control of Electric potentials unit specifically comprises:
Gate drivers, in the described first stage, exports the Continuity signal for the thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting by gate line; And, in described subordinate phase, by gate line, export for ending the pick-off signal of the thin film transistor (TFT) of current each sub-pixel unit of charging row;
Time schedule controller, for generation of the first trigger pip corresponding to the described first stage, and produces the second trigger pip corresponding to described subordinate phase, and wherein, described the second trigger pip produces after described pick-off signal output;
Source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row; And receive described the second trigger pip, and according to the triggering of described the second trigger pip, to described data line, export described reference voltage signal.
Preferably, in above-mentioned liquid crystal indicator, described source electrode driver comprises shift register, the first data working storage, the second data working storage, digital to analog converter and output circuit;
Wherein, described shift register, for reading of demonstration data corresponding to every data line of sequential control and reference voltage data;
Described the first data working storage, for obtaining the demonstration data of current charging row from described shift register and keeping in, and according to the triggering of described the first trigger pip, exports demonstration data to described digital to analog converter;
Described the second data working storage, for obtaining the reference voltage data of current charging row from described shift register and keeping in, and according to the triggering of described the second trigger pip, exports reference voltage data to described digital to analog converter;
Described digital to analog converter, for the digital signal receiving is carried out to digital-to-analog conversion, obtains corresponding analog voltage signal, and exports corresponding data line to by described output circuit.
Preferably, in above-mentioned liquid crystal indicator, also comprise:
Reference signal line with the corresponding setting of every a line sub-pixel unit; And,
With the public pressure wire that described common electric voltage circuit is connected, the voltage of described public pressure wire equals the common electric voltage of described common electric voltage circuit output;
Described sub-pixel unit also comprises the first film transistor and the second thin film transistor (TFT); Wherein, the transistorized grid of described the first film, source electrode and leakage level, be connected with corresponding gate line, data line and pixel electrode respectively; The grid of described the second thin film transistor (TFT), source electrode and leakage level, be connected with corresponding reference signal line, data line and described public pressure wire respectively;
Described control of Electric potentials unit specifically comprises:
Gate drivers, in the described first stage, exports transistorized the first Continuity signal of the first film for each sub-pixel unit of the current charging row of conducting by gate line; And in described subordinate phase, by gate line, export for ending transistorized first pick-off signal of the first film of current each sub-pixel unit of charging row;
Time schedule controller, for generation of the first trigger pip corresponding to the described first stage, and in described subordinate phase, the second Continuity signal by described reference signal line output for the second thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting, wherein, described the second Continuity signal is exported after described the first pick-off signal;
Source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row.
Preferably, in above-mentioned liquid crystal indicator, also comprise:
Reference signal line with the corresponding setting of every a line sub-pixel unit; And,
With the public pressure wire that described common electric voltage circuit is connected, the voltage of described public pressure wire equals the common electric voltage of described common electric voltage circuit output;
Described sub-pixel unit also comprises the first film transistor and the second thin film transistor (TFT); Wherein, the transistorized grid of described the first film, source electrode and leakage level, be connected with corresponding gate line, data line and pixel electrode respectively; The grid of described the second thin film transistor (TFT), source electrode and leakage level, be connected with corresponding reference signal line, data line and described public pressure wire respectively;
Described control of Electric potentials unit specifically comprises:
Gate drivers, in the described first stage, exports transistorized the first Continuity signal of the first film for each sub-pixel unit of the current charging row of conducting by gate line; And in described subordinate phase, by gate line, export for ending transistorized first pick-off signal of the first film of current each sub-pixel unit of charging row, and in described subordinate phase, the second Continuity signal by described reference signal line output for the second thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting, wherein, described the second Continuity signal is exported after described the first pick-off signal;
Time schedule controller, for generation of the first trigger pip corresponding to the described first stage;
Source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row.
Preferably, in above-mentioned liquid crystal indicator, described reference voltage equals the common electric voltage of described common electric voltage circuit output.
From the above, can find out, liquid crystal indicator provided by the invention and driving method thereof, by be divided into first stage and subordinate phase the theoretical write cycle of the demonstration data of pixel electrode: by display data signal, pixel electrode is charged on data line in the first stage, when subordinate phase keeps the voltage of pixel electrode, the voltage of data line is adjusted to a reference voltage, the common electric voltage that this reference voltage equals or exports close to common electric voltage circuit, impact in order to the stray capacitance between offset data line and public electrode on public electrode voltages, to alleviate or to eliminate the impact of this stray capacitance on public electrode voltages, thereby improve or eliminated crosstalking of the demonstration image that causes because of above-mentioned stray capacitance, green pair and the problems such as (Flicker) of glimmering, improved the display quality of image.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Thin Film Transistor-LCD of prior art;
Fig. 2 is the structural representation of the source electrode driver of prior art;
Fig. 3 is the structural representation of the liquid crystal indicator described in the embodiment of the present invention;
Fig. 4 is the structural representation of the source electrode driver of the embodiment of the present invention;
Fig. 5 is the sequential relationship schematic diagram of trigger pip TS1, TS2 and pick-off signal OE1 in the embodiment of the present invention;
Fig. 6 is the structural representation of the liquid crystal indicator described in another embodiment of the present invention.
Embodiment
The invention provides a kind of liquid crystal indicator and driving method thereof, by be divided into first stage and subordinate phase the theoretical write cycle of the demonstration data of pixel electrode: by display data signal, pixel electrode is charged on data line in the first stage, when subordinate phase keeps the voltage of pixel electrode, the voltage of data line is adjusted to a reference voltage, the common electric voltage that this reference voltage equals or exports close to common electric voltage circuit.The present invention is by this processing mode, stray capacitance between data line and public electrode is compensated the impact of public electrode voltages, to alleviate or to eliminate the impact of this stray capacitance on public electrode voltages, thereby improve or eliminate crosstalking of the demonstration image that causes because of above-mentioned stray capacitance, green pair and the problems such as (Flicker) of glimmering, the display quality of raising image.
Below with reference to accompanying drawing, by specific embodiment, the present invention is further illustrated.
The driving method of the liquid crystal indicator that the embodiment of the present invention provides, is applied to a liquid crystal indicator.This liquid crystal indicator comprises common electric voltage circuit, gate line, data line, a plurality of sub-pixel unit being defined by gate line and data line intersection; Described sub-pixel unit comprise pixel electrode and with the public electrode of the corresponding setting of described pixel electrode, described public electrode is connected with common electric voltage circuit.
The driving method of the liquid crystal indicator that the present embodiment provides, specifically comprises:
First stage, by described data line, display data signal is exported to the pixel electrode of current charging row;
And, subordinate phase in the theoretical write cycle of the demonstration data of pixel electrode, disconnect being connected of pixel electrode of described data line and current charging row, then on described data line, apply reference voltage signal, so that the current potential of described data line reaches a reference voltage, wherein, the difference of the common electric voltage of described reference voltage and the output of described common electric voltage circuit is in a preset range.Preferably, described reference voltage equals the common electric voltage of described common electric voltage circuit output.
Here, theoretical write cycle of the T of the demonstration data of pixel electrode is predetermined.For example, if liquid crystal indicator demonstration per second N two field picture has the capable sub-pixel unit of L on liquid crystal panel, so, just can determine T=1/N*L.In this theory T write cycle, the display data signal of being exported by source electrode driver is charged to the pixel electrode of the sub-pixel unit of current charging row, so that pixel electrode reaches corresponding current potential.Conventionally, pixel electrode only needs the shorter time, can reach corresponding current potential, and in the later stage of theory T write cycle, charging finishes.
Therefore, the present embodiment is divided into first stage and subordinate phase write cycle by theory, in the first stage, by data line, display data signal is exported to the pixel electrode of current charging row, with to pixel electrode charging, make the described voltage to the capable pixel electrode of inductive charging be charged to current potential corresponding to described display data signal, the pixel electrode of controlling described data line and current charging row in subordinate phase disconnects, to keep the current potential of described pixel electrode, and the current potential of data line is returned to a reference potential, the difference of the common electric voltage of reference voltage and the output of described common electric voltage circuit is in a preset range, for example this difference is between-0.1V～0.1V, this reference potential is close to the common electric voltage of common electric voltage circuit output like this, that is to say, the current potential of data line and the current potential of public electrode are very approaching, thereby can alleviate or eliminate the impact of above-mentioned stray capacitance on public electrode voltages, improve or eliminate crosstalking of the demonstration image that causes because of above-mentioned stray capacitance, green pair and the problems such as (Flicker) of glimmering, improve the display quality of image.
Liquid crystal indicator has normal black pattern and normal these two kinds of mode of operations of white mode conventionally.In the present embodiment, when described liquid crystal indicator is normal white mode, described reference voltage signal is white state signal; When described liquid crystal indicator is normal black pattern, described reference voltage signal is black state signal.
In the liquid crystal indicator of the present embodiment, each sub-pixel unit also comprises a thin film transistor (TFT), and the grid of described thin film transistor (TFT), source electrode and leakage level are connected with corresponding gate line, data line and pixel electrode respectively.That is, the grid of described thin film transistor (TFT) connects with corresponding gate line, and source electrode connects, leaks level with corresponding data line and is connected with the pixel electrode of this sub-pixel unit.Therefore, in the described first stage, the present embodiment is by the described thin film transistor (TFT) of the current charging row of conducting, to control the pixel electrode of described data line and current charging row, by described thin film transistor (TFT) is corresponding, be connected, then, output display data-signal on described data line, so that described voltage to the capable pixel electrode of inductive charging is charged to current potential corresponding to described display data signal.In described subordinate phase, further by the described thin film transistor (TFT) of the current charging row of cut-off, to disconnect being connected of pixel electrode of described data line and current charging row.
Below explanation has adopted the liquid crystal indicator of above driving method.
A kind of liquid crystal indicator provided by the invention, comprises common electric voltage circuit, gate line, data line, a plurality of sub-pixel unit being defined by gate line and data line intersection; Described sub-pixel unit comprise pixel electrode and with the public electrode of the corresponding setting of described pixel electrode, described public electrode is connected with common electric voltage circuit.Wherein, described liquid crystal indicator also comprises:
One control of Electric potentials unit, the first stage for the theoretical write cycle of the demonstration data at pixel electrode, exports display data signal to by described data line the pixel electrode of current charging row; And, subordinate phase in the theoretical write cycle of the demonstration data of pixel electrode, disconnect being connected of pixel electrode of described data line and current charging row, then on described data line, apply reference voltage signal, so that the current potential of described data line reaches a reference voltage, wherein, the difference of the common electric voltage of described reference voltage and the output of described common electric voltage circuit is in a preset range.Preferably, described reference voltage equals the common electric voltage of described common electric voltage circuit output.
The concrete structure of liquid crystal indicator of the present invention is below further described by two specific embodiments.
Please refer to Fig. 3, the liquid crystal indicator of one embodiment of the invention, comprising:
Liquid crystal panel 34, gate drivers 33, source electrode driver 31, time schedule controller 32 and provide the common electric voltage circuit 35 of common electric voltage.Wherein, this liquid crystal panel 34 comprises the public pressure wire 345 of gate line 343 and and the spaced set parallel with gate line 343 of many parallel spaced sets, many and the vertically disposed data line 341 of gate line 343, and a plurality of sub-pixel unit 342 being defined by gate line 343 and data line 341 intersections.This sub-pixel unit 342 comprises thin film transistor (TFT) 3421, one pixel electrodes and a public electrode (thin film transistor (TFT) 3421 is only shown in figure).Described public electrode is connected with common electric voltage circuit 35 by public pressure wire 345, thus common electric voltage circuit 35 by described public pressure wire 345 to public electrode outputting common voltage.The grid of thin film transistor (TFT) 3421 is connected to corresponding gate line 343, source electrode is connected to corresponding data line 341, leaks the pixel electrode that level is connected to these thin film transistor (TFT) 3421 affiliated sub-pixel unit.This pixel electrode, public electrode and the liquid crystal layer being sandwiched between the two form a liquid crystal capacitance C2; This pixel electrode, public pressure wire 345 and insulation course between the two form a memory capacitance C1.
In the present embodiment, the function of described control of Electric potentials unit realizes by described gate drivers, time schedule controller and source electrode driver, wherein,
Described gate drivers 33, in the described first stage, is used for the Continuity signal of the thin film transistor (TFT) 3421 of each sub-pixel unit of the current charging row of conducting by gate line 343 outputs; And, in described subordinate phase, by gate line 343, export for ending the pick-off signal of the thin film transistor (TFT) 3421 of current each sub-pixel unit of charging row;
Described time schedule controller 32, for generation of the first trigger pip corresponding to the described first stage, and produces the second trigger pip corresponding to described subordinate phase, and wherein, described the second trigger pip produces after described pick-off signal output;
Described source electrode driver 31, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to the pixel electrode of current charging row by described data line 341; And receive described the second trigger pip, and according to the triggering of described the second trigger pip, to the described reference voltage signal of described data line 341 output.
The structure of the source electrode driver 31 described in the present embodiment as shown in Figure 4, specifically comprises shift register, the first data working storage, the second data working storage, digital to analog converter and output circuit.
Wherein, described shift register, for reading of demonstration data corresponding to every data line of sequential control and reference voltage data;
Described the first data working storage, for obtaining the demonstration data of current charging row from described shift register and keeping in, and according to the triggering of described the first trigger pip, exports demonstration data to described digital to analog converter;
Described the second data working storage, for obtaining the reference voltage data of current charging row from described shift register and keeping in, and according to the triggering of described the second trigger pip, exports reference voltage data to described digital to analog converter;
Described digital to analog converter, for the digital signal receiving is carried out to digital-to-analog conversion, obtains corresponding analog voltage signal, and exports corresponding data line to by described output circuit.
Can find out, in the liquid crystal indicator of the present embodiment, source electrode driver 31 comprises two data working storages, wherein the first data working storage is kept in the demonstration data of sub-pixel unit, the second data working storage is kept in reference voltage data, and (when liquid crystal indicator is operated in normal white mode, this reference voltage data is data corresponding to white state signal; At liquid crystal indicator, be operated in normal black pattern pair, this reference voltage data is black state signal corresponding data).And, first, second data working storage is triggered by different trigger pips, for example, has two trigger pip TS1 and TS2, when TS1 is high level, the data in the first data working storage can be dished out, when TS2 is high level, the data in the second data working storage be dished out.
The theoretical write time of the demonstration data of the every a line sub-pixel unit of correspondence is divided into two stages.In the first stage, gate drivers under time schedule controller clock signal is controlled by the thin film transistor (TFT) conducting to the capable sub-pixel unit of inductive charging, trigger pip TS1 is that high level is applied to the data in the first data working storage on data line by digital to analog converter and output circuit simultaneously, thereby to the capable all pixel electrodes of inductive charging are charged.In subordinate phase, gate drivers produces under pick-off signal OE1 control at time schedule controller, by the thin film transistor (TFT) Close All capable to inductive charging, next line thin film transistor (TFT) is also in closed condition simultaneously, then by the trigger pip TS2 of output high level, reference voltage data in the second data working storage is applied on data line by digital to analog converter and output circuit, now mainly carries out the compensation for common electric voltage skew.In the present embodiment, the sequential relationship of trigger pip TS1, TS2 and pick-off signal OE1 as shown in Figure 5.
Please refer to Fig. 6, the liquid crystal indicator that another embodiment of the present invention provides comprises:
Liquid crystal panel 64, gate drivers 63, source electrode driver 61, time schedule controller 62 and provide the common electric voltage circuit 65 of common electric voltage.Wherein, this liquid crystal panel 64 comprises the public pressure wire 645 of gate line 643 and and the spaced set parallel with gate line 643 of many parallel spaced sets, many and the vertically disposed data line 641 of gate line 643, and a plurality of sub-pixel unit 642 being defined by gate line 643 and data line 641 intersections.Described public electrode is connected with common electric voltage circuit 65 by public pressure wire 645, thereby common electric voltage circuit 65 is to public electrode outputting common voltage.
Each sub-pixel unit 642 of the present embodiment comprises two thin film transistor (TFT)s (the first film transistor 6421 and the first film transistor 6422), a pixel electrode and a public electrode (not shown pixel electrode and public electrode).Here, public electrode is connected with common electric voltage circuit 65 by public pressure wire 645, thereby common electric voltage circuit 65 is by described public pressure wire 645 to public electrode outputting common voltage, and the voltage of described public pressure wire 645 equals the common electric voltage of described common electric voltage circuit 65 outputs.This pixel electrode, public electrode and the liquid crystal layer being sandwiched between the two form a liquid crystal capacitance C2; This pixel electrode, public pressure wire 645 and insulation course between the two form a memory capacitance C1.
Wherein, the grid of described the first film transistor 6421 is connected to corresponding gate line 643, source electrode is connected to corresponding data line 641, leaks the pixel electrode that level is connected to these thin film transistor (TFT) 6421 affiliated sub-pixel unit.The grid of described the second thin film transistor (TFT) 6422 is connected to corresponding reference signal line, source electrode and is connected to corresponding data line 641, leaks level and be connected to public pressure wire 645.
In the present embodiment, described liquid crystal indicator also comprises: with the reference signal line 647 of the corresponding setting of every a line sub-pixel unit, this reference signal line 647 can be parallel with gate line 643, and both quantity equate.
In the present embodiment, the function of described control of Electric potentials unit realizes by described gate drivers, time schedule controller and source electrode driver, wherein,
Described gate drivers, in the described first stage, exports transistorized the first Continuity signal of the first film for each sub-pixel unit of the current charging row of conducting by gate line; And in described subordinate phase, by gate line, export for ending transistorized first pick-off signal of the first film of current each sub-pixel unit of charging row;
Described time schedule controller, for generation of the first trigger pip corresponding to the described first stage, and in described subordinate phase, the second Continuity signal by described reference signal line output for the second thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting, wherein, described the second Continuity signal is exported after described the first pick-off signal;
Described source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row.
Can find out, the second Continuity signal of exporting on the line of reference signal described in Fig. 6 is produced by time schedule controller.Certainly, the second Continuity signal also can produce by other module described in the present embodiment, for example, by gate drivers, produced, now, the function of described control of Electric potentials unit realizes by following gate drivers, time schedule controller and source electrode driver, wherein
Described gate drivers, in the described first stage, exports transistorized the first Continuity signal of the first film for each sub-pixel unit of the current charging row of conducting by gate line; And in described subordinate phase, by gate line, export for ending transistorized first pick-off signal of the first film of current each sub-pixel unit of charging row, and in described subordinate phase, the second Continuity signal by described reference signal line output for the second thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting, wherein, described the second Continuity signal is exported after described the first pick-off signal;
Described time schedule controller, for generation of the first trigger pip corresponding to the described first stage;
Described source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row.
The above is only embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a driving method for liquid crystal indicator, described liquid crystal indicator comprises common electric voltage circuit, gate line, data line, a plurality ofly by gate line and data line, intersects the sub-pixel unit defining; Described sub-pixel unit comprise pixel electrode and with the public electrode of the corresponding setting of described pixel electrode, described public electrode is connected with common electric voltage circuit; It is characterized in that, described driving method comprises:
First stage in the theoretical write cycle of the demonstration data of pixel electrode, by described data line, display data signal is exported to the pixel electrode of current charging row;
And, subordinate phase in the theoretical write cycle of the demonstration data of pixel electrode, disconnect being connected of pixel electrode of described data line and current charging row, then on described data line, apply reference voltage signal, so that the current potential of described data line reaches a reference voltage, wherein, the difference of the common electric voltage of described reference voltage and the output of described common electric voltage circuit is in a preset range.
2. driving method as claimed in claim 1, is characterized in that,
Described sub-pixel unit also comprises a thin film transistor (TFT), and the grid of described thin film transistor (TFT), source electrode and leakage level are connected with corresponding gate line, data line and pixel electrode respectively;
The described pixel electrode that exports display data signal to current charging row by described data line comprises:
The described thin film transistor (TFT) of the current charging row of conducting, is connected by described thin film transistor (TFT) is corresponding to control the pixel electrode of described data line and current charging row;
Output display data-signal on described data line, so that described voltage to the capable pixel electrode of inductive charging is charged to current potential corresponding to described display data signal.
3. driving method as claimed in claim 2, is characterized in that,
In described subordinate phase, by ending the described thin film transistor (TFT) of current charging row, to disconnect being connected of pixel electrode of described data line and current charging row.
4. driving method as claimed in claim 1, is characterized in that, described reference voltage equals the common electric voltage of described common electric voltage circuit output.
5. a liquid crystal indicator, comprises common electric voltage circuit, gate line, data line, a plurality of sub-pixel unit being defined by gate line and data line intersection; Described sub-pixel unit comprise pixel electrode and with the public electrode of the corresponding setting of described pixel electrode, described public electrode is connected with common electric voltage circuit;
It is characterized in that, described liquid crystal indicator also comprises:
Control of Electric potentials unit, the first stage for the theoretical write cycle of the demonstration data at pixel electrode, exports display data signal to by described data line the pixel electrode of current charging row; And, subordinate phase in the theoretical write cycle of the demonstration data of pixel electrode, disconnect being connected of pixel electrode of described data line and current charging row, then on described data line, apply reference voltage signal, so that the current potential of described data line reaches a reference voltage, wherein, the difference of the common electric voltage of described reference voltage and the output of described common electric voltage circuit is in a preset range.
6. liquid crystal indicator as claimed in claim 5, is characterized in that, described sub-pixel unit also comprises a thin film transistor (TFT), and the grid of described thin film transistor (TFT), source electrode and leakage level are connected with corresponding gate line, data line and pixel electrode respectively; Described control of Electric potentials unit specifically comprises:
Gate drivers, in the described first stage, exports the Continuity signal for the thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting by gate line; And, in described subordinate phase, by gate line, export for ending the pick-off signal of the thin film transistor (TFT) of current each sub-pixel unit of charging row;
Time schedule controller, for generation of the first trigger pip corresponding to the described first stage, and produces the second trigger pip corresponding to described subordinate phase, and wherein, described the second trigger pip produces after described pick-off signal output;
Source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row; And receive described the second trigger pip, and according to the triggering of described the second trigger pip, to described data line, export described reference voltage signal.
7. liquid crystal indicator as claimed in claim 6, is characterized in that, described source electrode driver comprises shift register, the first data working storage, the second data working storage, digital to analog converter and output circuit;
Wherein, described shift register, for reading of demonstration data corresponding to every data line of sequential control and reference voltage data;
Described the first data working storage, for obtaining the demonstration data of current charging row from described shift register and keeping in, and according to the triggering of described the first trigger pip, exports demonstration data to described digital to analog converter;
Described the second data working storage, for obtaining the reference voltage data of current charging row from described shift register and keeping in, and according to the triggering of described the second trigger pip, exports described digital to analog converter to reference to voltage data;
Described digital to analog converter, for the digital signal receiving is carried out to digital-to-analog conversion, obtains corresponding analog voltage signal, and exports corresponding data line to by described output circuit.
8. liquid crystal indicator as claimed in claim 5, is characterized in that, also comprises:
Reference signal line with the corresponding setting of every a line sub-pixel unit; And,
With the public pressure wire that described common electric voltage circuit is connected, the voltage of described public pressure wire equals the common electric voltage of described common electric voltage circuit output;
Described sub-pixel unit also comprises the first film transistor and the second thin film transistor (TFT); Wherein, the transistorized grid of described the first film, source electrode and leakage level, be connected with corresponding gate line, data line and pixel electrode respectively; The grid of described the second thin film transistor (TFT), source electrode and leakage level, be connected with corresponding reference signal line, data line and described public pressure wire respectively;
Described control of Electric potentials unit specifically comprises:
Gate drivers, in the described first stage, exports transistorized the first Continuity signal of the first film for each sub-pixel unit of the current charging row of conducting by gate line; And in described subordinate phase, by gate line, export for ending transistorized first pick-off signal of the first film of current each sub-pixel unit of charging row;
Time schedule controller, for generation of the first trigger pip corresponding to the described first stage, and in described subordinate phase, the second Continuity signal by described reference signal line output for the second thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting, wherein, described the second Continuity signal is exported after described the first pick-off signal;
Source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row.
9. liquid crystal indicator as claimed in claim 5, is characterized in that, also comprises:
Reference signal line with the corresponding setting of every a line sub-pixel unit; And,
With the public pressure wire that described common electric voltage circuit is connected, the voltage of described public pressure wire equals the common electric voltage of described common electric voltage circuit output;
Described sub-pixel unit also comprises the first film transistor and the second thin film transistor (TFT); Wherein, the transistorized grid of described the first film, source electrode and leakage level, be connected with corresponding gate line, data line and pixel electrode respectively; The grid of described the second thin film transistor (TFT), source electrode and leakage level, be connected with corresponding reference signal line, data line and described public pressure wire respectively;
Described control of Electric potentials unit specifically comprises:
Gate drivers, in the described first stage, exports transistorized the first Continuity signal of the first film for each sub-pixel unit of the current charging row of conducting by gate line; And in described subordinate phase, by gate line, export for ending transistorized first pick-off signal of the first film of current each sub-pixel unit of charging row, and in described subordinate phase, the second Continuity signal by described reference signal line output for the second thin film transistor (TFT) of each sub-pixel unit of the current charging row of conducting, wherein, described the second Continuity signal is exported after described the first pick-off signal;
Time schedule controller, for generation of the first trigger pip corresponding to the described first stage;
Source electrode driver, for receiving described the first trigger pip, and according to the triggering of described the first trigger pip, exports display data signal to by described data line the pixel electrode of current charging row.
10. the liquid crystal indicator as described in as arbitrary in claim 5 to 9, is characterized in that, described reference voltage equals the common electric voltage of described common electric voltage circuit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110207466.5A CN102637415B (en) | 2011-07-22 | 2011-07-22 | Liquid crystal display device and drive method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110207466.5A CN102637415B (en) | 2011-07-22 | 2011-07-22 | Liquid crystal display device and drive method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102637415A CN102637415A (en) | 2012-08-15 |
| CN102637415B true CN102637415B (en) | 2014-03-12 |
Family
ID=46621789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110207466.5A Expired - Fee Related CN102637415B (en) | 2011-07-22 | 2011-07-22 | Liquid crystal display device and drive method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102637415B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156106B (en) | 2014-07-25 | 2017-07-25 | 京东方科技集团股份有限公司 | Contactor control device and its driving method |
| CN104900180B (en) | 2015-07-01 | 2018-02-13 | 京东方科技集团股份有限公司 | A kind of source electrode drive circuit and its driving method, display device |
| CN105810169A (en) | 2016-05-25 | 2016-07-27 | 深圳市华星光电技术有限公司 | Drive system and method of liquid crystal display |
| CN108694900B (en) * | 2017-04-05 | 2022-02-22 | 联咏科技股份有限公司 | Source electrode driving circuit, driving system and method for driving panel and display device thereof |
| CN109147704B (en) * | 2018-09-28 | 2021-02-26 | 合肥鑫晟光电科技有限公司 | Shift register unit, grid driving circuit, display device and driving method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6429841B1 (en) * | 1998-08-11 | 2002-08-06 | Lg. Philips Lcd Co., Ltd. | Active matrix liquid crystal display apparatus and method for flicker compensation |
| CN101295110A (en) * | 2007-04-25 | 2008-10-29 | 群康科技(深圳)有限公司 | Crystal display device and driving method thereof |
| CN101339752A (en) * | 2007-07-06 | 2009-01-07 | 恩益禧电子股份有限公司 | Capacitive load driving circuit, capacitive load driving method, and driving circuit for liquid crystal display device |
| CN101354870A (en) * | 2007-07-24 | 2009-01-28 | 北京京东方光电科技有限公司 | TFT-LCD control method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3343048B2 (en) * | 1997-04-25 | 2002-11-11 | シャープ株式会社 | Data line drive circuit and active matrix type liquid crystal display device having the same |
| JP4111521B2 (en) * | 2004-10-26 | 2008-07-02 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Electro-optic device |
| WO2007052421A1 (en) * | 2005-11-07 | 2007-05-10 | Sharp Kabushiki Kaisha | Display device, data signal drive line drive circuit, and display device drive method |
-
2011
- 2011-07-22 CN CN201110207466.5A patent/CN102637415B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6429841B1 (en) * | 1998-08-11 | 2002-08-06 | Lg. Philips Lcd Co., Ltd. | Active matrix liquid crystal display apparatus and method for flicker compensation |
| CN101295110A (en) * | 2007-04-25 | 2008-10-29 | 群康科技(深圳)有限公司 | Crystal display device and driving method thereof |
| CN101339752A (en) * | 2007-07-06 | 2009-01-07 | 恩益禧电子股份有限公司 | Capacitive load driving circuit, capacitive load driving method, and driving circuit for liquid crystal display device |
| CN101354870A (en) * | 2007-07-24 | 2009-01-28 | 北京京东方光电科技有限公司 | TFT-LCD control method |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平10-301538A 1998.11.13 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102637415A (en) | 2012-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100543530C (en) | Liquid crystal indicator and display packing thereof | |
| CN103400558B (en) | Shift register cell and driving method, gate driver circuit and display device | |
| CN103323990B (en) | A kind of display panels and liquid crystal indicator | |
| CN101587271B (en) | Liquid crystal display device | |
| CN101393718B (en) | Gate driver and method of driving display apparatus having the same | |
| CN103280201B (en) | Gate drive apparatus and display device | |
| CN103400563B (en) | Array substrate and liquid crystal display device | |
| CN103985366B (en) | Gate driver circuit, array base palte and display device | |
| CN100468508C (en) | Circuit for driving common voltage of in-plane switching mode liquid crystal display device | |
| CN105404033A (en) | Liquid crystal display device | |
| CN102013244B (en) | Liquid crystal display driving circuit and related driving method | |
| CN100476557C (en) | Liquid crystal panel, liquid crystal display device having the same and method for driving the same | |
| CN103454823B (en) | A kind of array base palte and display panels | |
| CN104182108A (en) | Array substrate, touch display device and driving method | |
| CN102637415B (en) | Liquid crystal display device and drive method thereof | |
| CN103744206A (en) | Array base-plate drive circuit, array base-plate and corresponding liquid crystal display | |
| CN101587700A (en) | Liquid crystal display and method for driving same | |
| CN106548759B (en) | A kind of GOA circuits and liquid crystal display | |
| CN105405415A (en) | Display Device And Display Method Thereof For Compensating Pixel Voltage Loss | |
| CN102956214A (en) | Common electrode driving unit, liquid crystal display panel and liquid crystal display device | |
| CN103412427A (en) | Liquid crystal display panel | |
| CN101178879A (en) | Display panel of LCD device and drive method thereof | |
| CN106128377B (en) | Liquid crystal display panel and pre-charge method, liquid crystal display device | |
| CN102779492B (en) | Liquid crystal display drive method and drive device | |
| CN102201213B (en) | Liquid crystal display device without upper plate electrode and driving method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20200722 |