CN101285979A - LCD device and relevant drive method - Google Patents
LCD device and relevant drive method Download PDFInfo
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- CN101285979A CN101285979A CNA2008101079087A CN200810107908A CN101285979A CN 101285979 A CN101285979 A CN 101285979A CN A2008101079087 A CNA2008101079087 A CN A2008101079087A CN 200810107908 A CN200810107908 A CN 200810107908A CN 101285979 A CN101285979 A CN 101285979A
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Abstract
The invention provides a liquid crystal display (LCD) device and corresponding driving methods, wherein, the LCD device mainly comprises a plurality of date lines, a plurality of grid lines and a plurality of pixel units. Each pixel unit comprises a first liquid crystal capacitor, a second liquid crystal capacitor, a first switch and a second switch. The first liquid crystal capacitor of each pixel unit is charged through the first switch of the same pixel unit; the second liquid crystal capacitor of each pixel unit is charged through the second switch of the same pixel unit and the first switch of the different pixel unit; the sub-pixel voltages of the first liquid crystal capacitor and the second liquid crystal capacitor corresponding to the same pixel units have the same polarity. The LCD driving methods disclosed by the invention are used for respectively writing two data signals with the same polarity into the first liquid crystal capacitor and the second liquid crystal capacitor of a pixel unit through the same data line during two partly laminated time intervals. The liquid crystal display (LCD) device and corresponding driving methods can avoid the defects of the prior art, reduce the power consumption and prolong the service life.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator and drive method thereof, relate in particular to a kind of clear zone electric capacity of pixel cell and liquid crystal indicator and drive method thereof that dark space electric capacity has same polarity sub-pixel voltage of making.
Background technology
(Liquid Crystal Display LCD) is present widely used a kind of flat-panel screens to liquid crystal indicator, features such as it has, and external form is frivolous, power saving and radiationless pollution.The principle of work of liquid crystal indicator is the ordered state that the voltage difference that utilize to change the liquid crystal layer two ends changes the liquid crystal molecule in the liquid crystal layer, in order to change the light transmission of liquid crystal layer, to cooperate backlight module again the light source that provided with show image.
Generally speaking, for making liquid crystal indicator have the characteristic of wide viewing angle, in a pixel cell, can design two sub-pixel unit, correspond to two gamma curve (Gamma Curve of two sub-pixel unit, be also referred to as gray scale curve), via the GTG average effect, can produce the best visual effect in different visual angles, promptly have high-quality wide viewing angle characteristic.Please refer to Fig. 1, Fig. 1 is known liquid crystal indicator synoptic diagram.As shown in Figure 1, liquid crystal indicator 100 comprises many gate lines 110, many data lines 120, many common electrode lines 130, a plurality of pixel cell 140 and source electrode drive circuits 180.Each pixel cell 140 comprises first switch 141, second switch 143, first liquid crystal capacitance (clear zone electric capacity), 145 and second liquid crystal capacitance (dark space electric capacity) 147, wherein first switch 141 and first liquid crystal capacitance 145 are combined as a sub-pixel unit, and the second switch 143 and second liquid crystal capacitance 147 are combined as another sub-pixel unit.
Each first liquid crystal capacitance 145 charges via first switch 141 of respective data lines 120 and same pixel unit 140.Each second liquid crystal capacitance 147 is via first switch 141 of respective data lines 120, different pixel cell 140, and the second switch 143 of same pixel unit 140 and charging.For example, the first liquid crystal capacitance C1 of pixel cell P1 charges via data line DL1 and the first switch T1, and the second liquid crystal capacitance C2 is via the first switch T3 of data line DL2, pixel cell P2, and second switch T2 and charging.
In the operation of row inversion driving, the data-signal of adjacent data line is an opposite polarity signals, and promptly when data-signal SD1 was positive signal, data-signal SD2 was the negative polarity signal, vice versa.So as sub-pixel voltage V corresponding to the first liquid crystal capacitance C1
B1During for positive polarity voltage, corresponding to the sub-pixel voltage V of the second liquid crystal capacitance C2
D1Be reverse voltage, yet when the sub-pixel voltage corresponding to the first liquid crystal capacitance C1 and the second liquid crystal capacitance C2 is bucking voltage, can influence Liquid Crystal Molecules Alignment, cause the luminance loss corresponding to the main slot (main-slit) between the first liquid crystal capacitance C1 and the second liquid crystal capacitance C2.In addition, first liquid crystal capacitance 145 and second liquid crystal capacitance 147 of same pixel cell 140 charge via different data line 120 respectively, so the driving frequency of data-signal will double, thereby cause high power consumption to make source electrode drive circuit 180 overheated easily, so can shorten the serviceable life of source electrode drive circuit 180.
Summary of the invention
For overcoming the defective of prior art, according to embodiments of the invention, it discloses a kind of liquid crystal indicator, comprises many data lines, many gate lines, many common electrode lines, multiple row pixel cell.Each bar data line is in order to receive the corresponding data signal.Each bar gate line is in order to receive corresponding signal, and each bar common electrode line is in order to receive common voltage.Each row pixel cell comprises a plurality of pixel cells.Each pixel cell comprises first liquid crystal capacitance, second liquid crystal capacitance, first switch and second switch.First liquid crystal capacitance comprises first end and second end, and wherein first end is coupled in corresponding common electrode line.Second liquid crystal capacitance comprises first end and second end, and wherein first end is coupled in corresponding common electrode line.First switch comprises first end, second end and gate terminal, and wherein first end is coupled in second end of first liquid crystal capacitance of same pixel unit, and gate terminal is coupled in corresponding gate line, and second end is coupled in respective data lines.Second switch comprises first end, second end and gate terminal, wherein first end is coupled in second end of second liquid crystal capacitance of same pixel unit, gate terminal is coupled in corresponding gate line, second end is coupled in first end of first switch of different pixel cell, and second end of second end of first switch of different pixel cell and first switch of same pixel unit is coupled in identical respective data lines.
According to embodiments of the invention, it discloses a kind of in order to drive the driving method of liquid crystal indicator in addition, this liquid crystal indicator comprises many data lines, many gate lines and multirow pixel cell, this driving method comprises: in first period of K image time, first signal voltage that will have first polarity, via first switch of m pixel cell of the capable pixel cell of n of the m bar data line of described many data lines and described multirow pixel cell, write first liquid crystal capacitance of m pixel cell of the capable pixel cell of n; And in second period of K image time, the secondary signal voltage that will have first polarity, via the second switch of m pixel cell of first switch of m pixel cell of the capable pixel cell of n+x of m bar data line, described multirow pixel cell and the capable pixel cell of n, write second liquid crystal capacitance of m pixel cell of the capable pixel cell of n; Wherein K, m and n are positive integer, and x is an even number.
In the data-signal write operation of liquid crystal indicator of the present invention, even the data-signal that adjacent data line provided is a polarity reversing signal, sub-pixel voltage corresponding to first and second liquid crystal capacitance of each pixel cell still can have identical polar, so can avoid causing the luminance loss because of influence corresponding to the Liquid Crystal Molecules Alignment of the main slot between first and second liquid crystal capacitance.In addition, because of first and second liquid crystal capacitance of same pixel cell charges via the identical data line, therefore the driving frequency of data-signal just need not double, and can reduce power consumption to reduce the working temperature of source electrode drive circuit, in order to prolong the serviceable life of source electrode drive circuit.In addition, in the operation of row inversion driving, the exportable display frame of liquid crystal indicator of the present invention with reversing mode.
Description of drawings
Fig. 1 is known liquid crystal indicator synoptic diagram.
Fig. 2 is the liquid crystal indicator synoptic diagram according to first embodiment of the invention.
Fig. 3 is the liquid crystal indicator synoptic diagram according to second embodiment of the invention.
Fig. 4 is that wherein transverse axis is a time shaft in order to the coherent signal sequential chart of the liquid crystal indicator that drives Fig. 2.
Fig. 5 is according to coherent signal shown in Figure 4 driving method process flow diagram with the liquid crystal indicator of driving Fig. 2.
Wherein, description of reference numerals is as follows:
100,200,300 liquid crystal indicators
110,210,310 gate lines
120,220,320 data lines
130,230,330 common electrode lines
140,240,340 pixel cells
141,241,341 first switches
143,243,343 second switches
145,245,345 first liquid crystal capacitances
147,247,347 second liquid crystal capacitances
180,280,380 source electrode drive circuits
332 auxiliary common electrode lines
390 preposition auxiliary pixel unit
391 first auxiliary switches
393 first auxiliary capacitors
395 rearmounted auxiliary pixel unit
397 second auxiliary switches
399 second auxiliary capacitors
C1, C3, C11, C13 first liquid crystal capacitance
C2, C4, C12, C14 second liquid crystal capacitance
CA1, CA2 first auxiliary capacitor
CA3, CA4 second auxiliary capacitor
CLn-CLn+5 common electrode line
CLA1-CLA4 assists the common electrode line
DL1, DL2, DLm, data line
DLm+1、DLm+2
The GLn-GLn+5 gate line
P1, P2, P1m-P4m, pixel cell
Pn_m-Pn+4_m、
Pn_m+1-Pn+3_m+1
The preposition auxiliary pixel of PA1, PA2 unit
The rearmounted auxiliary pixel of PA3, PA4 unit
The S505-S560 step
SD1, SD2, SDm, data-signal
SDm+1、SDm+2
The SGn-SGn+5 signal
T1, T3, T5, T6, first switch
T7、T11、T13、T15、T16
T2, T4, T12, T14 second switch
TA1, TA2 first auxiliary switch
TA3, TA4 second auxiliary switch
First period of Td1
Second period of Td2
The 3rd period of Td3
The 4th period of Td4
V
B1, V
Bn, V
D1, V
DnSub-pixel voltage
The Vcom common voltage
Embodiment
For making the present invention more apparent and understandable, hereinafter according to liquid crystal indicator of the present invention and drive method thereof, cooperate appended accompanying drawing to elaborate especially exemplified by embodiment, but the scope that the embodiment that is provided is not contained in order to restriction the present invention, carry out precedence and the method flow number of steps is more non-in order to limit it, any execution flow process that is reconfigured by method step, the method with impartial effect that produces all is the scope that the present invention is contained.
Fig. 2 is the liquid crystal indicator synoptic diagram according to first embodiment of the invention.As shown in Figure 2, liquid crystal indicator 200 comprises many gate lines 210, many data lines 220, many common electrode lines 230, multiple row pixel cell and source electrode drive circuits 280.Common electrode line 230 is in order to receive common voltage Vcom.Each row pixel cell comprises a plurality of pixel cells 240.Each pixel cell 240 comprises first switch 241, second switch 243, first liquid crystal capacitance (clear zone electric capacity), 245 and second liquid crystal capacitance (dark space electric capacity) 247.Source electrode drive circuit 280 is coupled in many data lines 220, in order to a plurality of data-signals to be provided.First switch 241 and second switch 243 can be metal oxide semiconductcor field effect transistor (Metal-Oxide-Semiconductor Field Effect Transistor) or thin film transistor (TFT) (Thin FilmTransistor).
First liquid crystal capacitance 245 comprises first end and second end, and wherein first end is coupled in corresponding common electrode line 230.Second liquid crystal capacitance 247 comprises first end and second end, and wherein first end is coupled in corresponding common electrode line 230.First switch 241 comprises first end, second end and gate terminal, and wherein first end is coupled in second end of corresponding first liquid crystal capacitance 245, and second end is coupled in respective data lines 220, and gate terminal is coupled in corresponding gate line 210.Second switch 243 comprises first end, second end and gate terminal, and wherein first end is coupled in second end of corresponding second liquid crystal capacitance 247, and second end is coupled in first end of first switch 241 of different pixel cell 240, and gate terminal is coupled in corresponding gate line 210.
For example, in n pixel cell Pn_m of m row pixel cell, first end of the first liquid crystal capacitance C1 and the second liquid crystal capacitance C2 is coupled in common electrode line CLn, the gate terminal of the first switch T1 and second switch T2 is coupled in gate lines G Ln, first end of the first switch T1 is coupled in second end of the first liquid crystal capacitance C1, first end of second switch T2 is coupled in second end of the second liquid crystal capacitance C2, second end of the first switch T1 is coupled in data line DLm, second end of second switch T2 is coupled in first end of the first switch T5 of n+2 pixel cell Pn+2_m of m row pixel cell, and second end of the first switch T5 is coupled in data line DLm.So second end of the first switch T1 and the first switch T5 all is coupled in data line DLm, promptly the first liquid crystal capacitance C1 and the second liquid crystal capacitance C2 are by data-signal SDm that data line DLm provided and charge.
In n+1 pixel cell Pn+1_m of m row pixel cell, first end of the first liquid crystal capacitance C3 and the second liquid crystal capacitance C4 is coupled in common electrode line CLn+ 1, the gate terminal of the first switch T3 and second switch T4 is coupled in gate lines G Ln+1, first end of the first switch T3 is coupled in second end of the first liquid crystal capacitance C3, first end of second switch T4 is coupled in second end of the second liquid crystal capacitance C4, second end of the first switch T3 is coupled in data line DLm+1, second end of second switch T4 is coupled in first end of the first switch T6 of n+3 pixel cell Pn+3_m of m row pixel cell, and second end of the first switch T6 is coupled in data line DLm+1.So second end of the first switch T3 and the first switch T6 all is coupled in data line DLm+1, promptly the first liquid crystal capacitance C3 and the second liquid crystal capacitance C4 are by data-signal SDm+1 that data line DLm+1 provided and charge.
In n pixel cell Pn_m+1 of m+1 row pixel cell, first end of the first liquid crystal capacitance C11 and the second liquid crystal capacitance C12 is coupled in common electrode line CLn, the gate terminal of the first switch T11 and second switch T12 is coupled in gate lines G Ln, first end of the first switch T11 is coupled in second end of the first liquid crystal capacitance C11, first end of second switch T12 is coupled in second end of the second liquid crystal capacitance C12, second end of the first switch T11 is coupled in data line DLm+1, second end of second switch T12 is coupled in first end of the first switch T15 of n+2 pixel cell Pn+2_m+1 of m+1 row pixel cell, and second end of the first switch T15 is coupled in data line DLm+1.So second end of the first switch T11 and the first switch T15 all is coupled in data line DLm+1, promptly the first liquid crystal capacitance C11 and the second liquid crystal capacitance C12 are by data-signal SDm+1 that data line DLm+1 provided and charge.
In n+1 pixel cell Pn+1_m+1 of m+1 row pixel cell, first end of the first liquid crystal capacitance C13 and the second liquid crystal capacitance C14 is coupled in common electrode line CLn+ 1, the gate terminal of the first switch T13 and second switch T14 is coupled in gate lines G Ln+1, first end of the first switch T13 is coupled in second end of the first liquid crystal capacitance C13, first end of second switch T14 is coupled in second end of the second liquid crystal capacitance C14, second end of the first switch T13 is coupled in data line DLm+2, second end of second switch T14 is coupled in first end of the first switch T16 of n+3 pixel cell Pn+3_m+1 of m+1 row pixel cell, and second end of the first switch T16 is coupled in data line DLm+2.So second end of the first switch T13 and the first switch T16 all is coupled in data line DLm+2, promptly the first liquid crystal capacitance C13 and the second liquid crystal capacitance C14 are by data-signal SDm+2 that data line DLm+2 provided and charge.All the other coupled relations are in like manner analogized.
From the above, each first liquid crystal capacitance 245 charges via first switch 241 of respective data lines 220 and same pixel unit 240, each second liquid crystal capacitance 247 is via first switch 241 of respective data lines 220, different pixel cell 240, and the second switch 243 of same pixel unit and charging, and first liquid crystal capacitance 245 of same pixel cell 240 and second liquid crystal capacitance 247 are charged by data-signal that identical data line 220 provided.So in the operation of row inversion driving, though the data-signal of adjacent data line is a polarity reversing signal, but corresponding to first liquid crystal capacitance 245 of same pixel cell 240 and the sub-pixel voltage of second liquid crystal capacitance 247 is same polarity voltage, promptly as the sub-pixel voltage V corresponding to the first liquid crystal capacitance C1
BnDuring for positive polarity voltage, then corresponding to the sub-pixel voltage V of the second liquid crystal capacitance C2
DnBe positive polarity voltage also, vice versa.In addition, second end adjacent or vertically first switch 241 of two adjacent pixel cells 240 is coupled to two different and adjacent data lines 220 owing to level, so in the operation of row inversion driving, by the reversed polarity data-signal of adjacent data line, exportable display frame with reversing mode.
In another embodiment, second end of the second switch T2 of n pixel cell Pn_m of m row pixel cell is coupled in first end of the first switch T7 of n+4 pixel cell Pn+4_m of m row pixel cell, because second end of the first switch T7 also is coupled in data line DLm, so the sub-pixel voltage of the first liquid crystal capacitance C1 and the second liquid crystal capacitance C2 still charges by data-signal SDm that data line DLm provided.In impartial embodiment, second end of the second switch T2 of n pixel cell Pn_m of m row pixel cell is coupled in first end of first switch of n+x pixel cell 240 of m row pixel cell, wherein m and n are positive integer, and x is an even number, so in the operation of row inversion driving, still be same polarity voltage corresponding to first liquid crystal capacitance 245 of same pixel cell 240 and the sub-pixel voltage of second liquid crystal capacitance 247.
Fig. 3 is the liquid crystal indicator synoptic diagram according to second embodiment of the invention.As shown in Figure 3, liquid crystal indicator 300 comprises many gate lines 310, many supplementary gate polar curves 312, many data lines 320, many common electrode lines 330, many auxiliary common electrode lines 332, multirow pixel cell, multirow auxiliary pixel unit and source electrode drive circuits 380.Common electrode line 330 and auxiliary common electrode line 332 are all in order to receive common voltage Vcom.Each row pixel cell comprises a plurality of pixel cells 340.Each pixel cell 340 comprises first switch 341, second switch 343, first liquid crystal capacitance 345 and second liquid crystal capacitance 347.Multirow auxiliary pixel unit comprises the first row auxiliary pixel unit, the second row auxiliary pixel unit, the third line auxiliary pixel unit and fourth line auxiliary pixel unit.Each bar supplementary gate polar curve 312 is in order to receive corresponding auxiliary grid signal.Source electrode drive circuit 380 is coupled in many data lines 320, in order to a plurality of data-signals to be provided.The coupled relation between the pixel cell of second row pixel cell and capable pixel cell second from the bottom of described multirow pixel cell is same as the pixel cell coupled relation of the liquid crystal indicator 200 of above-mentioned Fig. 2, so no longer show and give unnecessary details.
The first row auxiliary pixel unit and the second row auxiliary pixel unit comprise a plurality of preposition auxiliary pixels unit 390.The third line auxiliary pixel unit and fourth line auxiliary pixel unit comprise a plurality of rearmounted auxiliary pixels unit 395.Preposition auxiliary pixel unit 390 comprises first auxiliary switch 391 and first auxiliary capacitor 393.Rearmounted auxiliary pixel unit 395 comprises second auxiliary switch 397 and second auxiliary capacitor 399.First switch 341, second switch 343, first auxiliary switch 391 and second auxiliary switch 397 can be metal oxide semiconductcor field effect transistor or thin film transistor (TFT).
First auxiliary capacitor 393 comprises first end and second end, and wherein first end is coupled in corresponding auxiliary common electrode line 332.First auxiliary switch 391 comprises first end, second end and gate terminal, and wherein first end is coupled in second end of corresponding first auxiliary capacitor 393, and gate terminal is coupled in corresponding supplementary gate polar curve 312, the second ends and is coupled in corresponding first switch 341.Second auxiliary capacitor 399 comprises first end and second end, and wherein first end is coupled in corresponding auxiliary common electrode line 332.Second auxiliary switch 397 comprises first end, second end and gate terminal, wherein second end is coupled in respective data lines 320, gate terminal is coupled in second end that corresponding supplementary gate polar curve 312, the first ends are coupled in corresponding second auxiliary capacitor 399, and first end is coupled in corresponding second switch 343 in addition.
For example, in m preposition auxiliary pixel unit PA1 of the first row auxiliary pixel unit, first end of the first auxiliary capacitor CA1 is coupled in auxiliary common electrode line CLA1, first end of the first auxiliary switch TA1 is coupled in second end of the first auxiliary capacitor CA1, and second end of the first auxiliary switch TA1 is coupled in the first switch T2m of m pixel cell P2m of the second row pixel cell.In m preposition auxiliary pixel unit PA2 of the second row auxiliary pixel unit, first end of the first auxiliary capacitor CA2 is coupled in auxiliary common electrode line CLA2, first end of the first auxiliary switch TA2 is coupled in second end of the first auxiliary capacitor CA2, and second end of the first auxiliary switch TA2 is coupled in the first switch T1m of m pixel cell P1m of the first row pixel cell.
In m rearmounted auxiliary pixel unit PA3 of the third line auxiliary pixel unit, first end of the second auxiliary capacitor CA3 is coupled in auxiliary common electrode line CLA3, first end of the second auxiliary switch TA3 is coupled in second end of the second auxiliary capacitor CA3, second end of the second auxiliary switch TA3 is coupled in data line DLm, and first end of the second auxiliary switch TA3 is coupled in the second switch T4m of m pixel cell P4m of capable pixel cell second from the bottom in addition.In m rearmounted auxiliary pixel unit PA4 of fourth line auxiliary pixel unit, first end of the second auxiliary capacitor CA4 is coupled in auxiliary common electrode line CLA4, first end of the second auxiliary switch TA4 is coupled in second end of the second auxiliary capacitor CA4, second end of the second auxiliary switch TA4 is coupled in data line DLm+1, and first end of the second auxiliary switch TA4 is coupled in the second switch T3m of m pixel cell P3m of capable pixel cell last in addition.
The first row auxiliary pixel unit and the second row auxiliary pixel unit are used for assisting first liquid crystal capacitance 345 of the first row pixel cell and the second row pixel cell to carry out accurate data-signal write operation, if do not have first and second row auxiliary pixel unit, then can cause the data-signal of first liquid crystal capacitance 345 of first and second row pixel cell to write the distortion situation.The third line auxiliary pixel unit and fourth line auxiliary pixel unit are used for assisting second liquid crystal capacitance 347 of capable pixel cell last and capable pixel cell second from the bottom to carry out accurate data-signal write operation, and make first liquid crystal capacitance 345 of each pixel cell 340 of capable pixel cell last and capable pixel cell second from the bottom and the corresponding sub-pixel voltage of second liquid crystal capacitance 347 have identical polar, if do not have the 3rd and fourth line auxiliary pixel unit, then can't carry out the data-signal write operation of second liquid crystal capacitance 347 of capable pixel cell last and capable pixel cell second from the bottom.
From the above, in the data-signal write operation of liquid crystal indicator of the present invention, even the data-signal that adjacent data line provided is a polarity reversing signal, sub-pixel voltage corresponding to first and second liquid crystal capacitance of each pixel cell still can have identical polar, so can avoid causing the luminance loss because of influence corresponding to the Liquid Crystal Molecules Alignment of the main slot between first and second liquid crystal capacitance.In addition, because of first and second liquid crystal capacitance of same pixel cell charges via the identical data line, therefore the driving frequency of data-signal just need not double, and can reduce power consumption to reduce the working temperature of source electrode drive circuit, in order to prolong the serviceable life of source electrode drive circuit.In addition, in the operation of row inversion driving, the exportable display frame of liquid crystal indicator of the present invention with reversing mode.
Fig. 4 is that wherein transverse axis is a time shaft in order to the coherent signal sequential chart of the liquid crystal indicator that drives Fig. 2.In Fig. 4, basipetal signal is respectively a plurality of odd gates signal SGn, SGn+2 and SGn+4 and a plurality of even number signal SGn+1, SGn+3 and SGn+5.As shown in Figure 4, the liquid crystal indicator 200 that drives Fig. 2 to be to carry out the K image time of display operation, is divided into the first half image times and the second half image times.Please refer to Fig. 2, Fig. 4 and Fig. 5, Fig. 5 is according to coherent signal shown in Figure 4 driving method process flow diagram with the liquid crystal indicator of driving Fig. 2.As shown in Figure 5, driving method 500 comprises the following step:
Step S505: in the first period Td1 of the first half image times of K image time, activation signal SGn;
Step S510: in the first period Td1, according to the signal SGn that is enabled, the data-signal SDm that will have first polarity, via the first switch T1 of m pixel cell Pn_m of data line DLm and the capable pixel cell of n, the first liquid crystal capacitance C1 of pixel cell Pn_m is carried out charging procedure;
Step S515: in the first period Td1, according to the signal SGn that is enabled, the data-signal SDm+1 that will have second polarity, via the first switch T11 of m+1 pixel cell Pn_m+1 of data line DLm+1 and the capable pixel cell of n, the first liquid crystal capacitance C11 of pixel cell Pn_m+1 is carried out charging procedure;
Step S520: in the second period Td2 of the first half image times of K image time, activation signal SGn and SGn+2;
Step S525: in the second period Td2, according to signal SGn that is enabled and SGn+2, the data-signal SDm that will have first polarity, via the first switch T5 of m pixel cell Pn+2_m of data line DLm, the capable pixel cell of n+2 and the second switch T2 of pixel cell Pn_m, the second liquid crystal capacitance C2 of pixel cell Pn_m is carried out charging procedure;
Step S530: in the second period Td2, according to signal SGn that is enabled and SGn+2, the data-signal SDm+1 that will have second polarity, via the first switch T15 of m+1 pixel cell Pn+2_m+1 of data line DLm+1, the capable pixel cell of n+2 and the second switch T12 of pixel cell Pn_m+ 1, the second liquid crystal capacitance C12 of pixel cell Pn_m+1 is carried out charging procedure;
Step S535: in the 3rd period Td3 of the second half image times of K image time, activation signal SGn+1;
Step S540: in the 3rd period Td3, according to the signal SGn+1 that is enabled, the data-signal SDm+1 that will have second polarity, via the first switch T3 of m pixel cell Pn+1_m of data line DLm+1 and the capable pixel cell of n+1, the first liquid crystal capacitance C3 of pixel cell Pn+1_m is carried out charging procedure;
Step S545: in the 3rd period Td3, according to the signal SGn+1 that is enabled, the data-signal SDm+2 that will have first polarity, via the first switch T13 of m+1 pixel cell Pn+1_m+1 of data line DLm+2 and the capable pixel cell of n+1, the first liquid crystal capacitance C13 of pixel cell Pn+1_m+1 is carried out charging procedure;
Step S550: in the 4th period Td4 of the second half image times of K image time, activation signal SGn+1 and SGn+3;
Step S555: in the 4th period Td4, according to signal SGn+1 that is enabled and SGn+3, the data-signal SDm+1 that will have second polarity, via the first switch T6 of m pixel cell Pn+3_m of data line DLm+1, the capable pixel cell of n+3 and the second switch T4 of pixel cell Pn+1_m, the second liquid crystal capacitance C4 of pixel cell Pn+1_m is carried out charging procedure; And
Step S560: in the 4th period Td4, according to signal SGn+1 that is enabled and SGn+3, the data-signal SDm+2 that will have first polarity, via the first switch T16 of m+1 pixel cell Pn+3_m+1 of data line DLm+2, the capable pixel cell of this n+3 and the second switch T14 of pixel cell Pn+1_m+1, the second liquid crystal capacitance C14 of pixel cell Pn+1_m+1 is carried out charging procedure.
In the process step of above-mentioned driving method 500, K, m and n are positive integer, and first polarity and second polarity are opposite polarity, promptly when first polarity is positive polarity, then second polarity is negative polarity, or when first polarity was negative polarity, then second polarity was positive polarity.In addition, the first period Td1 and the second period Td2 overlap, or the second period Td2 is the part period of the first period Td1.In like manner the 3rd period Td3 and the 4th period Td4 overlap, or the 4th period Td4 is the part period of the 3rd period Td3.Though in sequential chart shown in Figure 4, the first half image times are preceding half image time, and the second half image times are later half image time, and in another embodiment, the first half image times and the second half image times can be respectively later half image time and preceding half image time.In impartial embodiment, pixel cell Pn+2_m, pixel cell Pn+2_m+1, pixel cell Pn+3_m and pixel cell Pn+3_m+1 are replaceable to be pixel cell Pn+x_m, pixel cell Pn+x_m+1, pixel cell Pn+x+1_m and pixel cell Pn+x+1_m+1, wherein x is an even number, and in the operation of row inversion driving, still has identical polar corresponding to first liquid crystal capacitance of same pixel cell and the sub-pixel voltage of second liquid crystal capacitance, and when showing a picture, the data-signal that same data line is exported still is the same polarity data-signal, only when image switching, the data-signal that same data line is exported just can switch to the data-signal of dissimilar polarities, so can reduce the polarity switching frequency of data line outputting data signals, can reduce the operand power consumption of liquid crystal indicator.
Though the present invention discloses as above with embodiment; yet it is not in order to limit the present invention; any have a general technical staff of the technical field of the invention; without departing from the spirit and scope of the present invention; should do various changes and retouching, so protection scope of the present invention should be looked the claim institute restricted portion of enclosing and is as the criterion.
Claims (20)
1. liquid crystal indicator comprises:
Many data lines, each bar data line receives a corresponding data-signal;
Many gate lines, each bar gate line receives a corresponding signal;
Many common electrode lines are used voltage altogether in order to receive; And
The multiple row pixel cell, each row pixel cell comprises a plurality of pixel cells, and a n pixel cell of a m row pixel cell of described multiple row pixel cell comprises:
One first liquid crystal capacitance comprises one first end and one second end, and wherein this first end is coupled in a corresponding common electrode line of described many common electrode lines;
One second liquid crystal capacitance comprises one first end and one second end, and wherein this first end is coupled in this correspondence common electrode line;
One first switch, comprise one first end, one second end and a gate terminal, wherein this first end is coupled in second end of this first liquid crystal capacitance, and this gate terminal is coupled in a corresponding gate line of described many gate lines, and this second end is coupled in a corresponding data line of described many data lines; And
One second switch, comprise one first end, one second end and a gate terminal, wherein this first end is coupled in second end of this second liquid crystal capacitance, and this gate terminal is coupled in this correspondence gate line, and this second end is coupled in first end of first switch of a different pixel cell;
Wherein second end of first switch of this different pixel cell is coupled in this respective data lines.
2. liquid crystal indicator as claimed in claim 1, wherein this different pixel cell is a n+x pixel cell of this m row pixel cell, and m and n are positive integer, and x is an even number.
3. liquid crystal indicator as claimed in claim 2, wherein x is 2.
4. liquid crystal indicator as claimed in claim 1, wherein:
Second end of first switch of this n pixel cell of this m row pixel cell is coupled in a m bar data line of described many data lines; And
Second end of first switch of one a n+2 pixel cell of this m row pixel cell is coupled in this m bar data line, and first end of first switch of this n+2 pixel cell is coupled in second end of second switch of this n pixel cell of this m row pixel cell.
5. liquid crystal indicator as claimed in claim 4, wherein:
Second end of first switch of one a n+1 pixel cell of this m row pixel cell is coupled in a m+1 bar data line of described many data lines; And
Second end of first switch of one a n+3 pixel cell of this m row pixel cell is coupled in this m+1 bar data line, and first end of first switch of this n+3 pixel cell is coupled in second end of second switch of this n+1 pixel cell of this m row pixel cell.
6. liquid crystal indicator as claimed in claim 1, wherein:
Second end of first switch of one a n pixel cell of one m+1 row pixel cell of described multiple row pixel cell is coupled in a m+1 bar data line of described many data lines; And
Second end of first switch of one a n+2 pixel cell of this m+1 row pixel cell is coupled in this m+1 bar data line, and first end of first switch of this n+2 pixel cell of this m+1 row pixel cell is coupled in second end of second switch of this n pixel cell of this m+1 row pixel cell.
7. liquid crystal indicator as claimed in claim 6, wherein:
Second end of first switch of one a n+1 pixel cell of this m+1 row pixel cell is coupled in a m+2 bar data line of described many data lines; And
Second end of first switch of one a n+3 pixel cell of this m+1 row pixel cell is coupled in this m+2 bar data line, and first end of first switch of this n+3 pixel cell of this m+1 row pixel cell is coupled in second end of second switch of this n+1 pixel cell of this m+1 row pixel cell.
8. liquid crystal indicator as claimed in claim 1 also comprises:
One first supplementary gate polar curve, adjacent to article one gate line of described many gate lines, this first supplementary gate polar curve is in order to receive one first auxiliary grid signal;
One second supplementary gate polar curve, adjacent to this first supplementary gate polar curve, this second supplementary gate polar curve is in order to receive one second auxiliary grid signal;
One first auxiliary common electrode line is in order to receive this common voltage;
One second auxiliary common electrode line is in order to receive this common voltage;
One first row auxiliary pixel unit comprises a plurality of auxiliary pixels unit, and each auxiliary pixel unit of this first row auxiliary pixel unit comprises:
One first auxiliary capacitor comprises one first end and one second end, and wherein this first end is coupled in this first auxiliary common electrode line; And
One first auxiliary switch comprises one first end, one second end and a gate terminal, and wherein this first end is coupled in second end of this first auxiliary capacitor, and this gate terminal is coupled in this first supplementary gate polar curve, and this second end is coupled in first end of corresponding first switch; And
One second row auxiliary pixel unit comprises a plurality of auxiliary pixels unit, and each auxiliary pixel unit of this second row auxiliary pixel unit comprises:
One second auxiliary capacitor comprises one first end and one second end, and wherein this first end is coupled in this second auxiliary common electrode line; And
One second auxiliary switch comprises one first end, one second end and a gate terminal, and wherein this first end is coupled in second end of this second auxiliary capacitor, and this gate terminal is coupled in this second supplementary gate polar curve, and this second end is coupled in first end of corresponding first switch.
9. liquid crystal indicator as claimed in claim 8, wherein:
Second end of first auxiliary switch of one a m auxiliary pixel unit of this first row auxiliary pixel unit is coupled in first end of first switch of one second pixel cell of this m row pixel cell; And
Second end of second auxiliary switch of one a m auxiliary pixel unit of this second row auxiliary pixel unit is coupled in first end of first switch of first pixel cell of this m row pixel cell.
10. liquid crystal indicator as claimed in claim 1 also comprises:
One first supplementary gate polar curve, adjacent to one last gate line of described many gate lines, this first supplementary gate polar curve is in order to receive one first auxiliary grid signal;
One second supplementary gate polar curve, adjacent to this first supplementary gate polar curve, this second supplementary gate polar curve is in order to receive one second auxiliary grid signal;
One first auxiliary common electrode line is in order to receive this common voltage;
One second auxiliary common electrode line is in order to receive this common voltage;
One first row auxiliary pixel unit comprises a plurality of auxiliary pixels unit, and each auxiliary pixel unit of this first row auxiliary pixel unit comprises:
One first auxiliary switch comprises one first end, one second end and a gate terminal, and wherein this first end is coupled in second end of a corresponding second switch, and this gate terminal is coupled in this first supplementary gate polar curve, and this second end is coupled in a corresponding data line; And
One first auxiliary capacitor comprises one first end and one second end, and wherein this first end is coupled in this first auxiliary common electrode line, and this second end is coupled in first end of this first auxiliary switch; And
One second row auxiliary pixel unit comprises a plurality of auxiliary pixels unit, and each auxiliary pixel unit of this second row auxiliary pixel unit comprises:
One second auxiliary switch comprises one first end, one second end and a gate terminal, and wherein this first end is coupled in second end of a corresponding second switch, and this gate terminal is coupled in this second supplementary gate polar curve, and this second end is coupled in a corresponding data line; And
One second auxiliary capacitor comprises one first end and one second end, and wherein this first end is coupled in this second auxiliary common electrode line, and this second end is coupled in first end of this second auxiliary switch.
11. liquid crystal indicator as claimed in claim 10, wherein:
First end of first auxiliary switch of one a m auxiliary pixel unit of this first row auxiliary pixel unit is coupled in second end of second switch of a penult pixel cell of this m row pixel cell; And
First end of second auxiliary switch of one a m auxiliary pixel unit of this second row auxiliary pixel unit is coupled in second end of second switch of one last pixel cell of this m row pixel cell.
12. one kind in order to driving the driving method of a liquid crystal indicator, this liquid crystal indicator comprises many data lines, many gate lines and multirow pixel cell, and this driving method comprises:
In one first period of a K image time, one first signal voltage that will have one first polarity, via one first switch of a m pixel cell of a capable pixel cell of n of m bar data line of described many data lines and described multirow pixel cell, write one first liquid crystal capacitance of this m pixel cell of the capable pixel cell of this n; And
In one second period of this K image time, the one secondary signal voltage that will have this first polarity, via a second switch of this m pixel cell of one first switch of a m pixel cell of a capable pixel cell of n+x of this m bar data line, described multirow pixel cell and the capable pixel cell of this n, write one second liquid crystal capacitance of this m pixel cell of the capable pixel cell of this n;
Wherein K, m and n are positive integer, and x is an even number.
13. driving method as claimed in claim 12 also comprises:
In one the 3rd period of this K image time, one the 3rd signal voltage that will have one second polarity, via one first switch of a m pixel cell of a capable pixel cell of n+1 of m+1 bar data line of described many data lines and described multirow pixel cell, write one first liquid crystal capacitance of this m pixel cell of the capable pixel cell of this n+1; And
In one the 4th period of this K image time, one the 4th signal voltage that will have this second polarity, via a second switch of this m pixel cell of one first switch of a m pixel cell of a capable pixel cell of n+x+1 of this m+1 bar data line, described multirow pixel cell and the capable pixel cell of this n+1, write one second liquid crystal capacitance of this m pixel cell of the capable pixel cell of this n+1.
14. driving method as claimed in claim 13, wherein this first polarity is positive polarity, and this second polarity is negative polarity.
15. driving method as claimed in claim 13, wherein this first polarity is negative polarity, and this second polarity is positive polarity.
16. driving method as claimed in claim 13, wherein this first period and this second period fall within one first image time of this K image time, and the 3rd period and the 4th period fall within one second image time of this K image time.
17. driving method as claimed in claim 13, wherein this first image time is preceding half image time or a later half image time of this K image time.
18. driving method as claimed in claim 13, wherein this first period and this second period overlap, and the 3rd period and the 4th period overlap.
19. driving method as claimed in claim 13, wherein this second period is the part period in this first period, and the 4th period was the part period in the 3rd period.
20. driving method as claimed in claim 13 also comprises:
In this first period, one the 5th signal voltage that will have this second polarity, via one first switch of a m+1 pixel cell of this m+1 bar data line and the capable pixel cell of this n, write one first liquid crystal capacitance of this m+1 pixel cell of the capable pixel cell of this n;
In this second period, one the 6th signal voltage that will have this second polarity, via a second switch of this m+1 pixel cell of one first switch of a m+1 pixel cell of this m+1 bar data line, the capable pixel cell of this n+x and the capable pixel cell of this n, write one second liquid crystal capacitance of this m+1 pixel cell of the capable pixel cell of this n;
In the 3rd period, one the 7th signal voltage that will have this first polarity, via one first switch of a m+1 pixel cell of m+2 bar data line of described many data lines and the capable pixel cell of this n+1, write one first liquid crystal capacitance of this m+1 pixel cell of the capable pixel cell of this n+1; And
In the 4th period, one the 8th signal voltage that will have this first polarity, via a second switch of this m+1 pixel cell of one first switch of a m+1 pixel cell of this m+2 bar data line, the capable pixel cell of this n+x+1 and the capable pixel cell of this n+1, write one second liquid crystal capacitance of this m+1 pixel cell of the capable pixel cell of this n+1.
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| CN2008101079087A CN101285979B (en) | 2008-05-21 | 2008-05-21 | LCD device and relevant drive method |
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| CN2008101079087A CN101285979B (en) | 2008-05-21 | 2008-05-21 | LCD device and relevant drive method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514842A (en) * | 2012-06-26 | 2014-01-15 | 奇景光电股份有限公司 | Image display |
| TWI463469B (en) * | 2012-05-31 | 2014-12-01 | Himax Tech Ltd | Image display |
| CN110806668A (en) * | 2019-11-19 | 2020-02-18 | 京东方科技集团股份有限公司 | Display panel, driving method of display panel and display device |
| CN113689817A (en) * | 2021-09-03 | 2021-11-23 | Tcl华星光电技术有限公司 | Drive circuit and display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI330746B (en) * | 2006-08-25 | 2010-09-21 | Au Optronics Corp | Liquid crystal display and operation method thereof |
| KR101254227B1 (en) * | 2006-08-29 | 2013-04-19 | 삼성디스플레이 주식회사 | Display panel |
| CN101017265A (en) * | 2007-03-12 | 2007-08-15 | 友达光电股份有限公司 | Control device of pixel and display device using same |
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2008
- 2008-05-21 CN CN2008101079087A patent/CN101285979B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI463469B (en) * | 2012-05-31 | 2014-12-01 | Himax Tech Ltd | Image display |
| CN103514842A (en) * | 2012-06-26 | 2014-01-15 | 奇景光电股份有限公司 | Image display |
| CN103514842B (en) * | 2012-06-26 | 2015-08-05 | 奇景光电股份有限公司 | Image display |
| CN110806668A (en) * | 2019-11-19 | 2020-02-18 | 京东方科技集团股份有限公司 | Display panel, driving method of display panel and display device |
| CN110806668B (en) * | 2019-11-19 | 2022-07-22 | 京东方科技集团股份有限公司 | Display panel, driving method of display panel and display device |
| CN113689817A (en) * | 2021-09-03 | 2021-11-23 | Tcl华星光电技术有限公司 | Drive circuit and display device |
| CN113689817B (en) * | 2021-09-03 | 2023-08-01 | Tcl华星光电技术有限公司 | Driving circuit and display device |
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| Publication number | Publication date |
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| CN101285979B (en) | 2010-04-14 |
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