CN1983373A - Device and method for decreasing display-panel string voice - Google Patents
Device and method for decreasing display-panel string voice Download PDFInfo
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- CN1983373A CN1983373A CN 200510132126 CN200510132126A CN1983373A CN 1983373 A CN1983373 A CN 1983373A CN 200510132126 CN200510132126 CN 200510132126 CN 200510132126 A CN200510132126 A CN 200510132126A CN 1983373 A CN1983373 A CN 1983373A
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Abstract
A display face plate driving method enabling to decrease crosstalk includes using time sequence controller to provide polarity control signal to be used on partial source electrode driving unit and then providing reversed phase of polarity to the other source electrode driving unit. The driving device used for realizing said method is also disclosed.
Description
Technical field
The present invention relates to a kind of apparatus and method of driving display panel, particularly a kind of display panel drive device and method that reduces cross-talk (crosstalk).
Background technology
In order to strengthen the display quality of display panel, often with the reversal of poles (inversion) of display panel drive signal.For example, the material that the display panel of Thin Film Transistor-LCD (TFT-LCD) adopts liquid crystal to show as control, polarize for fear of liquid crystal, need drive with exchange way, develop and for example line counter-rotating (Line Inversion), some counter-rotating (Dot Inversion), row counter-rotatings (ColumnInversion) or the like all kinds of reversal of poles driving methods.
Fig. 1 is the driving framework that general LCD is described.Please refer to Fig. 1, source electrode driver 110 is exported a plurality of pixel drive signals respectively with gate drivers 120 and is given corresponding data line and sweep trace in the display panel 130 with sweep signal.Generally speaking, source electrode driver 110 is made up of a plurality of source electrode driven integrated circuit, and gate drivers 120 also is made up of a plurality of grid-driving integrated circuit.130 more than pixel cells (for example pixel cell 140) of display panel are electrically connected to the data line and the sweep trace of correspondence respectively.Each pixel cell is preface in sweep signal in the sweep trace respectively, and pixel drive signal in the storage data line.
Fig. 2 is the reason that causes horizontal cross-talk in the general pixel cell of explanation.Please refer to Fig. 2, be connected the arrival of all pixel cells (for example pixel cell 231 and 232) meeting of same sweep trace 210, and simultaneously its internal switch (for example switch 241 and 242) opened (turnon) because of sweep signal.At this moment, all pixel cells that are connected same sweep trace 210 can be stored in pixel drive signal in the data line (for example data line 221 or 222) of its correspondence the storage capacitors C of its inside
StWith liquid crystal capacitance C
LcYet, liquid crystal capacitance C
LcIt is the deflection angle that determines its liquid crystal according to the potential difference (PD) at its two ends.Because have stray capacitance Csc between each data line and the common pressure-wire, so the common voltage Vcom in the common voltage line will influence the waveform of common voltage Vcom wherein because of the signal transmission of each data line.As storage capacitors C
StWith liquid crystal capacitance C
LcWhen storing pixel drive signal, be subjected to the coupling effect of each data line and changed its voltage level as if common voltage Vcom, then this liquid crystal capacitance C
LcThe voltage difference that is kept not is a normal electrical pressure reduction, so this pixel cell demonstrates unexpected GTG.This phenomenon is called horizontal cross-talk.
At this hypothesis display panel 130 are " normality is white " type display panels, and when promptly its liquid crystal capacitance did not apply voltage, its transmittance was the highest.The relation curve of the voltage difference of its transmittance and liquid crystal capacitance as shown in Figure 3A.Wherein, in high and low liquid crystal voltage part, because rate of curve is little, so liquid crystal voltage changes black with the transmittance influence is little in vain.Otherwise, in the medium voltage part, because rate of curve is big, so liquid crystal voltage changes to middle GTG influence very greatly.Therefore, when the research level cross-talk, we inquire at the change of middle GTG.Fig. 3 B then is that explanation desires to make liquid crystal capacitance to show the positive polarity voltage+W of " white " GTG and the positive polarity voltage+B and reverse voltage-B and the positive polarity voltage+M of demonstration centre GTG and the level of reverse voltage-M of reverse voltage-W, demonstration " black " GTG.
Be reversed to example with point, Fig. 4 A is the partial pixel cell matrix of known some inversion driving display panel of explanation.Please refer to Fig. 4 A, will show for example that at this background color is the picture that there are the black square in middle GTG and central authorities.When opening the pixel cell of sweep trace SL1, pixel drive signal is sent to the pixel cell that is unlocked by data line DL1～DL12.Owing to be to use an inversion technique, so the odd number of a sweep trace SL1 pixel cell is the positive polarity voltage+M of middle GTG, and an even numbers pixel cell is the reverse voltage-M of middle GTG.Then, when opening the pixel cell of sweep trace SL2, by data line DL1～DL12 pixel drive signal is sent to the pixel cell that is unlocked, by that analogy.
Fig. 4 B is in the display panel of key diagram 4A, the waveform sequential chart of common voltage Vcom.During the pixel cell of driven sweep line SL1, SL2, SL5 and SL6, because positive polarity voltage+M and the reverse voltage-M of middle GTG can repeal by implication to the coupling energy of common voltage Vcom, so little to the influence of the waveform of common voltage Vcom.Sweep trace SL3 and SL4 again, though the data line of centerablock DL5～DL8 transmits big it " black " pixel drive signal of voltage, positive polarity voltage+the B of its yet " black " and reverse voltage-B can repeal by implication to the coupling energy of common voltage Vcom, and be therefore little to the influence of the waveform of common voltage Vcom.
Fig. 5 A is the partial pixel cell matrix of known some inversion driving display panel of explanation.Will show for example that at this background color is Cs open (pixel cell that is odd number bar data line shows middle GTG, and the pixel cell of even numbers bar data line shows " black "), and central authorities there is the picture of black square.When opening the pixel cell of sweep trace SL1～SL6 successively, pixel drive signal is sent to the pixel cell that is unlocked by data line DL1～DL12.Therefore, an odd number pixel cell of odd number bar sweep trace is the positive polarity voltage+M of middle GTG, and an even numbers pixel cell is the reverse voltage-B of " black "; An odd number pixel cell of even numbers bar sweep trace is the reverse voltage-M of middle GTG, and an even numbers pixel cell is the positive polarity voltage+B of " black "; Wherein the pixel cell of black square then is the positive polarity voltage+B and the reverse voltage-B of " black ".
Fig. 5 B is in the display panel of key diagram 5A, the waveform sequential chart of common voltage Vcom.During the pixel cell of driven sweep line SL1 and SL5, because much smaller than the reverse voltage-B of " black " coupling energy to common voltage Vcom, so common voltage Vcom will be subjected to influencing of data line DL1～DL12 and negative pulse takes place to the coupling energy of common voltage Vcom for the positive polarity voltage+M of middle GTG.During the pixel cell of driven sweep line SL2 and SL6, because much smaller than the positive polarity voltage+B of " black " coupling energy to common voltage Vcom, so common voltage Vcom will be subjected to influencing of data line DL1～DL12 and positive pulse takes place to the coupling energy of common voltage Vcom for the reverse voltage-M of middle GTG.Sweep trace SL3 and SL4 again, because the positive polarity voltage+B and the reverse voltage-B of " black " can repeal by implication to the coupling energy of common voltage Vcom in the centerablock, therefore during driven sweep line SL3 or the pixel cell of SL4, less negative pulse or positive pulse will take place in common voltage Vcom.The width of central authorities' black block is wide more, and then Pulse Electric pressure reduction Δ Vp big more (being that briliancy difference is big more) makes cross-talk serious more.
Fig. 6 A is the partial pixel cell matrix of known some inversion driving display panel of explanation.Will show for example that at this background color is middle GTG, and central authorities there is the picture of Cs open square.When opening the pixel cell of sweep trace SL1～SL6 successively, pixel drive signal is sent to the pixel cell that is unlocked by data line DL1～DL18.Fig. 6 B is in the display panel of key diagram 6A, the waveform sequential chart of common voltage Vcom.During the pixel cell of driven sweep line SL1, SL2, SL5 and SL6, because positive polarity voltage+M and the reverse voltage-M of middle GTG can repeal by implication to the coupling energy of common voltage Vcom, so little to the influence of the waveform of common voltage Vcom.In Cs open square, the odd number of a sweep trace SL3 pixel cell is the positive polarity voltage+M of middle GTG, an even numbers pixel cell is the reverse voltage-B of " black ", since the positive polarity voltage+M of middle GTG to the coupling energy of common voltage Vcom much smaller than the reverse voltage-B of " black " coupling energy to common voltage Vcom, therefore during the pixel cell of driven sweep line SL3, common voltage Vcom will be subjected to influencing of data line DL1～DL18 and bigger negative pulse takes place.In addition, in Cs open square, the odd number of a sweep trace SL4 pixel cell is the reverse voltage-M of middle GTG, an even numbers pixel cell is the positive polarity voltage+B of " black ", since the reverse voltage-M of middle GTG to the coupling energy of common voltage Vcom much smaller than the positive polarity voltage+B of " black " coupling energy to common voltage Vcom, therefore during the pixel cell of driven sweep line SL4, common voltage Vcom will be subjected to influencing of data line DL1～DL12 and bigger positive pulse takes place.The width of the Cs open of central authorities block is wide more, and then Pulse Electric pressure reduction Δ Vp big more (being that briliancy difference is big more) makes cross-talk serious more.
From the above, cross-talk will have a strong impact on the display quality of display panel.How avoiding taking place cross-talk will be an important topic.
Summary of the invention
The present invention's purpose just provides a kind of display panel drive device of reduction cross-talk, time schedule controller offers the different polarity control signal in each source drive unit by not gate, allow the pixel polarity of same horizontal scanning line neutralize as far as possible, avoiding the data line polarity on the display panel that common voltage Vcom is caused coupling, thereby can reach the effect that reduces cross-talk.
The present invention's a purpose again provides a kind of displaying panel driving method of reduction cross-talk, by changing the received polar signal of polar end of source drive unit, can allow the pixel polarity of same horizontal scanning line neutralize as far as possible, avoiding the data line polarity on the display panel that common voltage Vcom is caused coupling, thereby can reach the effect that reduces cross-talk.
Based on above-mentioned and other purpose, the present invention proposes a kind of display panel drive device of reduction cross-talk, and it comprises a plurality of source electrode driven integrated circuits, a not gate and a time schedule controller.Each source electrode driven integrated circuit has polar end, and determines the pixel drive signal exported separately according to the polarity of its polar end.The function mode of its device is that time schedule controller is exported a plurality of pixel datas to each source electrode driven integrated circuit, and output polarity controls signal to the input end of not gate.The input end of not gate is electrically connected to the polar end of the source electrode driven integrated circuit of a part, and the output terminal of not gate then is connected to the polar end of other parts source electrode driven integrated circuit.And source electrode driven integrated circuit determines the polarity of the pixel drive signal exported separately according to the polarity of its polar end.Then, source electrode driven integrated circuit is converted to the pixel data of institute's reception correspondence pixel drive signal and exports it again.
From another viewpoint, the present invention proposes a kind of display panel drive device of reduction cross-talk, and the present invention proposes a kind of display panel drive device of reduction cross-talk, and it comprises a plurality of source electrode driver elements, a not gate and a time schedule controller.Each source drive unit has polar end, and determines the polarity of the pixel drive signal exported separately according to the polarity of its polar end.The function mode of its device is that time schedule controller is exported a plurality of pixel datas to each source drive unit, and output polarity controls signal to the input end of not gate.The input end of not gate then is electrically connected to the polar end of the source electrode driven integrated circuit of a part, and the output terminal of not gate is electrically connected to the polar end of other parts source electrode driven integrated circuit.And the source drive unit determines the polarity of the pixel drive signal exported separately according to the polarity of its polar end.Afterwards, the long-pending body unit of source drive is converted to the pixel data of institute's reception correspondence pixel drive signal and exports it again.
The present invention proposes a kind of displaying panel driving method of reduction cross-talk in addition, the driving method of this display panel is as follows, at first, the polar end of polarity control signal to the source drive unit of part is provided, again that this polarity control signal is anti-phase, with acquisition reverse polarity control signal, and provide this reverse polarity to control signal to the polar end of the driver element of other parts.Wherein, each source drive unit determines this pixel drive signal of exporting according to its polar end separately, and then, a plurality of source electrode driver elements are output pixel drive signal and drive this display panel separately.
The present invention is because of adopting the structure with the polarity control signal change of each source drive unit, therefore can make the neutralization as far as possible of same the pixel polarity on the horizontal scanning line on the display panel, avoid common voltage Vcom is caused coupling and produces the cross-talk phenomenon, and strengthen display effect.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the driving framework that general LCD is described.
Fig. 2 is the reason that causes horizontal cross-talk in the general pixel cell of explanation.
Fig. 3 A is the transmittance of general " normality is white " the type display panel of explanation and the graph of relation of voltage.
Fig. 3 B then be explanation " white ", " black " with middle GTG just/voltage level of negative polarity.
Fig. 4 A is the partial pixel cell matrix of known some inversion driving display panel of explanation.
Fig. 4 B is in the display panel of key diagram 4A, the waveform sequential chart of common voltage Vcom.
Fig. 5 A illustrates known to be the picture that there are the black square in Cs open and central authorities with the background color, to test the partial pixel cell matrix with the display panel of an inversion driving.
Fig. 5 B is in the display panel of key diagram 5A, the waveform sequential chart of common voltage Vcom.
Fig. 6 A illustrates known to be the picture that there are Cs open square in middle tone and central authorities with the background color, to test the partial pixel cell matrix with the display panel of an inversion driving.
Fig. 6 B is in the display panel of key diagram 6A, the waveform sequential chart of common voltage Vcom.
It shown in Fig. 7 A circuit block diagram according to a kind of Liquid crystal display board driving mchanism of first embodiment of the invention explanation.
Fig. 7 B is the partial pixel cell matrix of display panels of some inversion driving of explanation the present invention's first embodiment, wherein is to be that the pattern of black square is arranged is test pictures for Cs open and central authorities with the background color.
Fig. 7 C is the partial pixel cell matrix of display panels of some inversion driving of the present invention's first embodiment, show that at this background color is middle GTG, and central authorities is the picture of Cs open square.
It shown in Fig. 8 A circuit block diagram according to a kind of Liquid crystal display board driving mchanism of second embodiment of the invention explanation.
Fig. 8 B is the partial pixel cell matrix of display panels of some inversion driving of explanation the present invention's second embodiment, wherein is to be that the pattern of black square is arranged is test pictures for Cs open and central authorities with the background color.
Fig. 8 C is the partial pixel cell matrix of display panels of some inversion driving of the present invention's second embodiment, show that at this background color is middle GTG, and central authorities is the picture of Cs open square.
Shown in Figure 9 is circuit block diagram according to a kind of Liquid crystal display board driving mchanism of third embodiment of the invention explanation.
The main element description of symbols
110: source electrode driver
120: gate drivers
130: display panel
140: pixel cell
210: sweep trace
221,222: data line
231,232: pixel cell
241,242: switch
701～708,801～808: source electrode driven integrated circuit
710,810,910: not gate
720,820,920: time schedule controller
730,830,930: display panels
901～903: the source drive unit module
901-1～901-n: source drive unit
901-11: latch circuit
901-12: digital analog converter
SL1～SL8: sweep trace
DL1～DL18: data line
POL: polarity control signal
/ POL: reverse polarity control signal
D: pixel data
Embodiment
In order to clearly demonstrate the present invention more, below all be to implement example among all embodiment with the display panels.The person of ordinary skill in the field is when can be according to the present invention's spirit and demonstrating of embodiment, and class is pushed into various display panels, and it is all the present invention's scope.
It shown in Fig. 7 A a kind of circuit block diagram that reduces the Liquid crystal display board driving mchanism of cross-talk of first embodiment of the invention.Please refer to Fig. 7 A, this Liquid crystal display board driving mchanism comprises source electrode driven integrated circuit 701～708, not gate 710, time schedule controller 720 and display panels 730.Time schedule controller 720 sends many pixel data D to source electrode driven integrated circuit 701～708 successively.Time schedule controller 720 is gone back output polarity control signal POL, and each source electrode driven integrated circuit is then separately according to polarity control signal that its polar end received and determine the polarity of institute's output pixel drive signal.
In present embodiment, time schedule controller 720 provides polarity control signal POL polar end to the source electrode driven integrated circuit 701～704 of panel 730 left side one side of something, and then the inversion signal of receiving polarity control signal POL (is a reverse polarity control signal/POL) to the polar end of the source electrode driven integrated circuit 705～708 of right side one side of something by not gate 710.Source electrode driven integrated circuit 701～708 is converted to the pixel drive signal of correspondence with the pixel data of institute's reception, and determines the polarity of institute's output pixel drive signal separately according to the signal of its polar end.Source electrode driven integrated circuit 701～708 is exported a plurality of pixel drive signals and is driven display panels 730.At this, though Fig. 7 A only draws 8 source electrode driven integrated circuits, the quantity of source electrode driven integrated circuit is not limited to 8, and the person of ordinary skill in the field can increase and decrease its quantity according to its demand.
Fig. 7 B and Fig. 7 C are the partial pixel cell matrix of first embodiment with an inversion driving display panels 730.At this hypothesis display panels 730 are " normality is white " type display panels, when promptly its liquid crystal capacitance does not apply voltage, and its transmittance the highest (the relation curve example of the voltage difference of its transmittance and liquid crystal capacitance is as shown in Figure 3A).Among Fig. 7 B+B represents respectively to drive this pixel cell with the positive polarity voltage of " black " GTG and reverse voltage with-B, and+M and-M represents respectively to drive this pixel cell with the positive polarity voltage of middle GTG and reverse voltage.
Fig. 7 B is that the Driving technique with a counter-rotating is an example, will show that for example background color is the picture that there are the black square in Cs open (be GTG in the middle of the pixel cell of odd number bar data line shows, and the pixel cell of even numbers bar data line showing " black ") and central authorities.Please be simultaneously with reference to Fig. 7 A and Fig. 7 B, when the pixel cell of unlatching sweep trace SL1, source electrode driven integrated circuit 701～708 is sent to pixel drive signal by data line DL1～DL16 the pixel cell that is unlocked.Owing to be to use an inversion technique, therefore in the pixel cell of sweep trace SL1, data line DL1, DL3, DL5 and DL7 are sent to the pixel cell of correspondence with the positive polarity voltage+M of middle GTG, and data line DL2, DL4, DL6 and DL8 are sent to the reverse voltage-B of " black " GTG the pixel cell of correspondence.In addition, because not gate 710 is converted to polarity control signal POL reverse polarity control signal/POL and exports to source electrode driven integrated circuit 705～708, therefore in the pixel cell of sweep trace SL1, data line DL9, DL11, DL13 and DL15 are sent to the pixel cell of correspondence with the reverse voltage-M of middle GTG, and data line DL10, DL12, DL14 and DL16 are sent to the positive polarity voltage+B of " black " GTG the pixel cell of correspondence.Then by that analogy, when opening the pixel cell of sweep trace SL2～SL8 successively, the pixel drive signal by data line DL1～DL16 with correspondence is sent to the pixel cell that is unlocked.
In other words, when opening the pixel cell of sweep trace SL1～SL8 successively, because each data line pixel drive signal that DL1～DL16 transmitted can be complementary in the polarity of same GTG, therefore can make the neutralization as far as possible of same the pixel polarity on the horizontal scanning line on the display panel, and reduced the cross-talk phenomenon that the coupling because of common voltage Vcom and data line produces, and strengthen display effect.
Fig. 7 C is that the Driving technique with a counter-rotating is an example, for example will show that background color is the picture that there are Cs open square in middle tone and central authorities.Please be simultaneously with reference to Fig. 7 A and Fig. 7 C.At this, we are example with the sweep trace SL3 of centre.When opening the pixel cell of sweep trace SL3, source electrode driven integrated circuit 701～708 is sent to pixel drive signal by data line DL1～DL16 the pixel cell that is unlocked.Owing to be to use an inversion technique, therefore in the pixel cell of sweep trace SL3, data line DL1, DL3, DL5 and DL7 are sent to the positive polarity voltage+M of middle GTG the pixel cell of correspondence, data line DL2 and DL4 then are sent to the reverse voltage-M of middle GTG the pixel cell of correspondence, and DL6 and DL8 are sent to the reverse voltage-B of " black " GTG the pixel cell of correspondence.In addition, because not gate 710 is converted to polarity control signal POL reverse polarity control signal/POL and exports to source electrode driven integrated circuit 705～708, therefore in the pixel cell of sweep trace SL3, data line DL9, DL11, DL13 and DL15 are sent to corresponding pixel cell with the reverse voltage-M of middle GTG, and DL10 and DL12 are sent to the pixel cell of correspondence with the positive polarity voltage+B of " black " GTG, and data line DL14 and DL16 then are sent to the positive polarity voltage+M of middle GTG the pixel cell of correspondence.Then, when opening the pixel cell of sweep trace SL4～SL8, the pixel drive signal by data line DL1～DL16 with correspondence is sent to the pixel cell that is unlocked by that analogy.
In other words, when same sweep trace opened, the data line pixel drive signal that DL1～DL16 transmitted can be complementary in the polarity of same GTG, so when opening sweep trace SL1～SL8 successively, in the pixel polarity neutralization as far as possible that can make on the display panel on each bar horizontal scanning line, and reduced the cross-talk phenomenon that the coupling because of common voltage Vcom and data line produces, make display effect better because of reducing the cross-talk phenomenon.
It shown in Fig. 8 A a kind of circuit block diagram that reduces the Liquid crystal display board driving mchanism of cross-talk of second embodiment of the invention.Please refer to Fig. 8 A, this Liquid crystal display board driving mchanism comprises source electrode driven integrated circuit 801～808, not gate 810, time schedule controller 820 and display panels 830.In present embodiment, source electrode driven integrated circuit 801～808, not gate 810, time schedule controller 820 and display panels 830 for example respectively with the source electrode driven integrated circuit 701～708 of preceding embodiment, not gate 710, time schedule controller 720 and display panels 730 are similar, its difference is that time schedule controller 820 provides polarity control signal POL to an odd number source electrode driven integrated circuit 801,803,805 and 807 polar end, reverse polarity control signal/POL that not gate 810 is exported then exports an even numbers source electrode driven integrated circuit 802 to, 804,806 and 808 polar end.At this, though Fig. 8 A only draws 8 source electrode driven integrated circuits, the quantity of source electrode driven integrated circuit is not limited to 8, and the person of ordinary skill in the field can increase and decrease its quantity according to its demand.
Fig. 8 B and Fig. 8 C are the partial pixel cell matrix of second embodiment with an inversion driving display panels 830.At this hypothesis display panels 830 are " normality is white " type display panels, and when promptly its liquid crystal capacitance did not apply voltage, its transmittance was the highest.
Fig. 8 B is that the Driving technique with a counter-rotating is an example, for example will show that background color is the picture that there are the black square in Cs open and central authorities.Please be simultaneously with reference to Fig. 8 A and Fig. 8 B, when the pixel cell of unlatching sweep trace SL1, source electrode driven integrated circuit 801～808 is sent to pixel drive signal by data line DL1～DL16 the pixel cell that is unlocked.Owing to be to use an inversion technique, therefore in the pixel cell of sweep trace SL1, source electrode driven integrated circuit 801,803,805 and 807 is sent to the pixel cell of correspondence by data line DL1, DL5, DL9 and DL13 with the positive polarity voltage+M of middle GTG, and the reverse voltage-B of " black " GTG is sent to the pixel cell of correspondence by data line DL2, DL6, DL10 and DL14.In addition, because not gate 810 is converted to reverse polarity control signal/POL with polarity control signal POL, therefore source electrode driven integrated circuit 802,804,806 and 808 is sent to the pixel cell of correspondence by data line DL3, DL7, DL11 and DL15 with the reverse voltage-M of middle GTG, and the positive polarity voltage+B of " black " GTG is sent to the pixel cell of correspondence by data line DL4, DL8, DL12 and DL16.According to this rule, when opening the pixel cell of sweep trace SL2～SL8 successively, the pixel drive signal by data line DL1～DL16 with correspondence is sent to the pixel cell that is unlocked then.
In other words, effect via not gate, make that the polarity of the same GTG of the data line pixel drive signal that DL1～DL16 transmitted on same sweep trace can be complementary, so at sweep trace SL1～SL8, pixel polarity on each bar horizontal scanning line can neutralize as far as possible, so can reduce the cross-talk phenomenon that the coupling because of common voltage Vcom and data line produces, make the cross-talk phenomenon lower and to strengthen display effect.
Fig. 8 C also is that the Driving technique with a counter-rotating is an example, for example will show that background color is the picture that there are Cs open square in middle tone and central authorities.Please be simultaneously with reference to Fig. 8 A and Fig. 8 C.At this, we are example with the sweep trace SL3 of centre.When opening the pixel cell of sweep trace SL3, source electrode driven integrated circuit 701～708 is sent to pixel drive signal by data line DL1～DL16 the pixel cell that is unlocked.Owing to be to use an inversion technique, therefore in the pixel cell of sweep trace SL3, source electrode driven integrated circuit 801,803,805 and 807 is sent to the positive polarity voltage+M of middle GTG the pixel cell of correspondence by data line DL1, DL5, DL9 and DL13, by data line DL2 and DL14 the reverse voltage-M of middle GTG is sent to the pixel cell of correspondence, and the reverse voltage-B of " black " GTG is sent to the pixel cell of correspondence by DL6 and DL10.In addition, because not gate 810 is converted to reverse polarity control signal/POL with polarity control signal POL, therefore source electrode driven integrated circuit 802,804,806 and 808 is sent to corresponding pixel cell by data line DL3, DL7, DL11 and DL15 with the reverse voltage-M of middle GTG, by DL8 and DL12 the positive polarity voltage+B of " black " GTG is sent to the pixel cell of correspondence, then positive polarity voltage+the M of middle GTG is sent to the pixel cell of correspondence by data line DL4 and DL16.Then, when opening the pixel cell of sweep trace SL4～SL8 successively again, the pixel drive signal by data line DL1～DL16 with correspondence is sent to the pixel cell that is unlocked, by that analogy.
In other words, when same sweep trace opened, the data line pixel drive signal that DL1～DL16 transmitted can be complementary in the polarity of same GTG, so the pixel polarity on same horizontal scanning line on the display panel can neutralize as far as possible, therefore reduce the cross-talk phenomenon that the coupling because of common voltage Vcom and data line produces, and made the display effect enhancing.
Shown in Figure 9 is a kind of circuit block diagram that reduces the Liquid crystal display board driving mchanism of cross-talk of third embodiment of the invention.Please refer to Fig. 9, this Liquid crystal display board driving mchanism comprises not gate 910, time schedule controller 920, display panels 930 and source drive unit module 901～903.Source drive unit module 901～903 can be encapsulated as source electrode driven integrated circuit separately.Each self-contained multiple source utmost point driver element of each source drive unit module, for example source drive unit module 901 comprises source drive unit 901-1～901-n, wherein each self-driven display panels 930 of each source drive unit respective data lines wherein.
With source drive unit 901-1 is example, and it comprises latch circuit 901-11 and digital analog converter 901-12 at least.According to the control of time schedule controller 920, latch circuit 901-11 in corresponding sequential with pixel data D breech lock in wherein.Digital analog converter 901-12 will be converted to simulating signal by the pixel data of breech lock.Source drive unit 901-1 is according to simulating signal that digital analog converter 901-12 produced and the output pixel drive signal.In addition, source drive unit 901-1 also determines the polarity of pixel drive signal according to the signal (is polarity control signal POL at this) of its polar end, drives the pixel of display panels 930 again by data line.
In Fig. 9, other source drive unit 901-2,901-3,901-4 can have the same structure as 901-1, receive pixel data D from time schedule controller 920, and the output pixel drive signal is to display panels 930 again.Though be received as polarity control signal POL but difference to each other is source drive unit 901-1,901-2, and that source drive unit 901-3,901-4 reception is reverse polarity control signal/POL.So, cause the data structure of a reversible type except having because of AC driving on each data line, in addition because of the source drive unit to each other the anti-phase meeting of polarity cause the anti-phase of each pixel cell polarity, the result can cause the pixel drive signal that each data line transmits can be complementary in the polarity of same GTG.Therefore when opening each sweep trace successively, the polarity of the pixel on each bar horizontal scanning line of display panel can neutralize as far as possible, so reduced the cross-talk phenomenon that the coupling because of common voltage Vcom and data line produces.If will show that background color is the picture that there are the Csopen square in middle tone and central authorities, then Fig. 8 C with aforementioned is identical.
In sum, time schedule controller can provide different polarity control signals by not gate, and these different polarity control signals are coupled to the polar end of each source drive unit, make each source drive unit on each horizontal scanning line on the display panel, have the distribution of opposed polarity, and the both positive and negative polarity performance on each horizontal scanning line is cancelled out each other, just can reduce the crosstalk effect that produces by common voltage Vcom.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the invention; when can doing a little change and improvement, so the present invention's protection domain is as the criterion when looking the claim person of defining.
Claims (6)
1. display panel drive device that reduces cross-talk is characterized in that comprising:
A plurality of source electrode driven integrated circuits, drive this display panel in order to export a plurality of pixel drive signals, wherein each above-mentioned these source electrode driven integrated circuit also has polar end, and each above-mentioned these source electrode driven integrated circuit determines the polarity of above-mentioned these pixel drive signals of exporting separately according to its polar end;
Not gate, its output terminal are electrically connected to the polar end of above-mentioned these source electrode driven integrated circuits of a part, and the input end of this not gate is electrically connected to the polar end of above-mentioned these source electrode driven integrated circuits of other parts; And
Time schedule controller give above-mentioned these source electrode driven integrated circuits in order to export a plurality of pixel datas, and output polarity controls signal to the input end of this not gate;
Wherein each above-mentioned these source electrode driven integrated circuit is converted to above-mentioned these pixel drive signals and output with stating these pixel datas on institute's reception correspondence separately.
2. according to the display panel drive device of the described reduction cross-talk of claim 1, it is characterized in that this display panel is a display panels.
3. a display panel drive device that reduces cross-talk is characterized in that this display panel has many data lines, and this display panel drive device comprises:
A plurality of source electrode driver elements, its output terminal is electrically connected in above-mentioned these data lines in this display panel respectively, in order to output pixel drive signal separately and drive this display panel, wherein each above-mentioned these source drive unit has polar end, and each above-mentioned these source drive unit determines it to export the polarity of this pixel drive signal according to its polar end separately;
Not gate, its output terminal is electrically connected to the polar end of stating these source drive unit on the part, and the input end of this not gate is electrically connected to the polar end of stating these source drive unit on the other parts; And
Time schedule controller give above-mentioned these source drive unit in order to export a plurality of pixel datas, and output polarity controls signal to the input end of this not gate;
Wherein each above-mentioned these source drive unit is converted to above-mentioned these pixel drive signals and output with stating these pixel datas on institute's reception correspondence separately.
4. according to the display panel drive device of the described reduction cross-talk of claim 3, it is characterized in that this display panel is a display panels.
5. displaying panel driving method that reduces cross-talk, it is characterized in that it being by a plurality of source electrode driver elements output pixel drive signal and drive this display panel separately, and each above-mentioned these source drive unit determines it to export the polarity of this pixel drive signal according to its polar end separately, and this displaying panel driving method comprises:
Provide polarity control signal to state the polar end of these source drive unit to the part;
This polarity control signal is anti-phase, to obtain the reverse polarity control signal; And
Provide this reverse polarity to control signal to the polar end of stating these source drive unit on the other parts.
6. according to the displaying panel driving method of the described reduction cross-talk of claim 5, it is characterized in that this display panel is a display panels.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510132126 CN1983373A (en) | 2005-12-16 | 2005-12-16 | Device and method for decreasing display-panel string voice |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510132126 CN1983373A (en) | 2005-12-16 | 2005-12-16 | Device and method for decreasing display-panel string voice |
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| CN1983373A true CN1983373A (en) | 2007-06-20 |
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| CN 200510132126 Pending CN1983373A (en) | 2005-12-16 | 2005-12-16 | Device and method for decreasing display-panel string voice |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162944A (en) * | 2008-03-18 | 2011-08-24 | 友达光电股份有限公司 | Display panel driving method |
| CN102842299A (en) * | 2012-09-13 | 2012-12-26 | 京东方科技集团股份有限公司 | Liquid crystal display device and method and apparatus for driving liquid crystal display device |
| US8354977B2 (en) | 2008-02-27 | 2013-01-15 | Au Optronics Corporation | Driving method for solving problem of cross talk effect of display panel |
| CN103943087A (en) * | 2014-04-04 | 2014-07-23 | 京东方科技集团股份有限公司 | Drive circuit of displayer and display device |
| CN113129849A (en) * | 2021-04-09 | 2021-07-16 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and pixel driving method |
-
2005
- 2005-12-16 CN CN 200510132126 patent/CN1983373A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8354977B2 (en) | 2008-02-27 | 2013-01-15 | Au Optronics Corporation | Driving method for solving problem of cross talk effect of display panel |
| CN102162944A (en) * | 2008-03-18 | 2011-08-24 | 友达光电股份有限公司 | Display panel driving method |
| CN102842299A (en) * | 2012-09-13 | 2012-12-26 | 京东方科技集团股份有限公司 | Liquid crystal display device and method and apparatus for driving liquid crystal display device |
| CN102842299B (en) * | 2012-09-13 | 2015-04-08 | 京东方科技集团股份有限公司 | Liquid crystal display device and method and apparatus for driving liquid crystal display device |
| CN103943087A (en) * | 2014-04-04 | 2014-07-23 | 京东方科技集团股份有限公司 | Drive circuit of displayer and display device |
| US9430978B2 (en) | 2014-04-04 | 2016-08-30 | Boe Technology Group Co., Ltd. | Display drive circuit and display apparatus |
| CN113129849A (en) * | 2021-04-09 | 2021-07-16 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and pixel driving method |
| CN113129849B (en) * | 2021-04-09 | 2022-11-01 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and pixel driving method |
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