CN102176091B - Driving method of display panel - Google Patents
Driving method of display panel Download PDFInfo
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- CN102176091B CN102176091B CN 201110103039 CN201110103039A CN102176091B CN 102176091 B CN102176091 B CN 102176091B CN 201110103039 CN201110103039 CN 201110103039 CN 201110103039 A CN201110103039 A CN 201110103039A CN 102176091 B CN102176091 B CN 102176091B
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Abstract
The invention discloses a driving method of a display panel, and the method comprise the following steps: generating a plurality of data signals so as to drive a plurality of pixels in the display panel, wherein the pixels in the display panel are arranged in an array manner to form a pixel array; and furthermore, relating the voltage polarity and size of the data signal so that the summation of the voltage values of the data signals in one unit area of the display panel actually is zero.
Description
The application be that March 18, application number in 2008 are 200810083025.7 the applying date, denomination of invention divides an application for the application for a patent for invention of " driving method of display panel ".
Technical field
The present invention relates to a kind of Driving technique of display panel, and particularly relate to a kind of Driving technique that solves the display panel of crosstalk effect.
Background technology
Fig. 1 shows a kind of structural drawing of known display panels.Please refer to Fig. 1, in known display panel 100, comprised infrabasal plate 102 and upper substrate 104.On the surface of upper substrate 104, can dispose many data lines at infrabasal plate 102, for example D1, D2, D3, D4, and multi-strip scanning line, for example S1 and S2, arrangement interlaced with each other.In addition, upper substrate 104 then can dispose a plurality of colored filters 110 on the surface of infrabasal plate 102.And on colored filter 110, then can form community electrode 112.In addition, between infrabasal plate 102 and upper substrate 104, then fill a liquid crystal material.Therefore, between data line D1-D4 and common electrode 112, can there be a capacity effect.
Fig. 2 A shows a kind of oscillogram of data-signal with common voltage of known display panels.Please merge with reference to figure 1 and Fig. 2 A, wherein data-signal DS1, DS2, DS 3 and DS4 can be sent to respectively among data line D1, D2, D3 and the D4 in the display panel 100.In Fig. 2 A, r1 is defined as bright attitude voltage, and r2 then can be defined as dark attitude voltage.When one of them was enabled when sweep trace, data-signal DS1, DS2, DS3 and DS4 can drive respectively each pixel on the sweep trace that is enabled.
In some known technologies, a kind of technology of time division is suggested.In other words, a frame time is divided at least two sub-frame times.Wherein, gray scale of each subframe time showing.By this, display panel shown picture in a frame time is comprised of two gray scales at least.For this time cutting techniques, the driving method that known technology proposes a kind of DDR (Double Data Rate) drives display panel, shown in Fig. 2 B.Please refer to Fig. 2 B, in this known Driving technique, can in different pictures, give each pixel different voltage according to different gamma voltage setting values, to solve the problem of colour cast (Color washout).
Because each pixel all has liquid crystal capacitance, and known voltage and the polarity that is sent to each pixel, can be different from voltage and the polarity of neighbor.At this moment, will produce coupling effect between the neighbor, so that the common voltage Vcom size of zones of different may be not identical on the display panel 100.Therefore, great majority drive the known technology (comprising the DDR Driving technique) of liquid crystal panel, all can cause at display panel the phenomenon of brightness irregularities, shown in Fig. 2 C.In Fig. 2 C, different viewing area A1, A2 and A3 have different brightness, and this just is called as crosstalk effect.
Summary of the invention
Therefore, the invention provides a kind of driving method of display panel, can effectively reduce cross-talk and colour cast effect.
In addition, the invention provides a kind of solution of crosstalk effect, can not need change the design of hardware, just can effectively reduce in the display panel because the impact that crosstalk effect causes.
The invention provides a kind of driving method of display panel, comprise producing a plurality of data-signals, drive a plurality of pixels in the display panel.Wherein, the pixel in the display panel is arranged with array way, and forms a pel array.In addition, adjust polarity of voltage and the size of data-signal, so that the voltage data signal value summation essence in a unit area of display panel is 0.
From another viewpoint, the present invention also provides a kind of solution of crosstalk effect, goes for having the display panel of pel array.Solution of the present invention is included in the unit area of pel array, adjusts the cross-pressure of the liquid crystal capacitance of each pixel, makes it identical with the liquid crystal capacitance cross-pressure of pixel of another relative position in the unit area.In addition, in unit area, adjust the cross-pressure polarity of the liquid crystal capacitance of each pixel, make its with unit area in the cross-pressure polarity of liquid crystal capacitance of pixel of another relative position opposite each other.
Because can to make the magnitude of voltage summation of data-signal in the unit area is 0 in the present invention, so the present invention can reduce crosstalk effect effectively, and the present invention can also further solve the phenomenon of colour cast.In addition, because the present invention utilizes the cross-pressure of adjusting liquid crystal capacitance to solve crosstalk effect.Therefore, the present invention only need change the control mode of firmware, and does not need to change the structure of hardware, just can achieve the goal so that the present invention expends cheaper cost.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 shows a kind of structural drawing of known display panels.
Fig. 2 A shows a kind of oscillogram of data-signal with common voltage of known display panels.
Fig. 2 B shows a kind of synoptic diagram of Driving technique of known display panels.
Fig. 2 C shows the synoptic diagram of the cross-talk phenomenon on a kind of display panel.
Fig. 3 shows the synoptic diagram according to the driving method of a kind of display panel of the first embodiment of the present invention.
Fig. 4 shows the synoptic diagram according to pixel voltage value on a kind of display panel of first embodiment of the invention.
Fig. 5 shows the synoptic diagram according to the driving method of a kind of display panel of the second embodiment of the present invention.
Fig. 6 shows the synoptic diagram according to pixel voltage value on a kind of display panel of second embodiment of the invention.
Fig. 7 shows the synoptic diagram according to the driving method of a kind of display panel of the third embodiment of the present invention.
Fig. 8 shows the synoptic diagram according to pixel voltage value on a kind of display panel of third embodiment of the invention.
Fig. 9 shows the synoptic diagram according to the driving method of a kind of display panel of the fourth embodiment of the present invention.
Figure 10 shows the synoptic diagram according to pixel voltage value on a kind of display panel of fourth embodiment of the invention.
Figure 11 shows the synoptic diagram of pixel voltage value on the display panel in different pictures according to fifth embodiment of the invention a kind of.
Figure 12 shows the synoptic diagram according to the driving method of a kind of display panel of the fifth embodiment of the present invention.
Figure 13 shows the synoptic diagram of pixel voltage value on the display panel in same picture according to fifth embodiment of the invention a kind of.
The reference numeral explanation
100: display panel
102: infrabasal plate
104: upper substrate
110: colored filter
112: common electrode
114: liquid crystal material
402,404,602,604,802,804,1002,1004,1302,1304: unit area
1102: pixel
D1, D2, D3, D4: data line
DS1, DS2, DS 3, DS4: data-signal
F1, F2, F3, F4, F5, F6: picture
R1, r2, r3: voltage level
S1, S2: sweep trace
Vcom: common voltage
X: direction
Y1, Y2: OK
Embodiment
The present invention provides the means of multiple driving display panel at following each section.And the main spirit of the present invention is, the pel array of a display panel is divided into a plurality of unit areas, and adjusts polarity of voltage and the size of the pixel in the per unit zone so that in the constituent parts zone data voltage value total value be 0.By this, just can effectively suppress the impact that crosstalk effect is brought in the display panel, detailed explanation please refer to the narration of following each section.
The first embodiment
Fig. 3 shows the synoptic diagram according to the driving method of a kind of display panel of the first embodiment of the present invention, and Fig. 4 then shows the synoptic diagram according to pixel voltage value on a kind of display panel of first embodiment of the invention.Please merge with reference to figure 3 and Fig. 4, display panel can have a pel array, and it can be arranged with array way by a plurality of pixels and form.And the pixel in the pel array can couple corresponding data line, for example D1, D2, D3 and D4 separately.In the present embodiment, a plurality of data-signals are arranged, for example DS1, DS2, DS3 and DS4 are produced out, and are sent to respectively in the corresponding data line.For example, data-signal DS1 and DS2 are delivered to respectively adjacent two data line D1 and D2.Similarly, data-signal DS3 and DS4 also are sent to adjacent two data line D3 and D4.
In the data-signal of present embodiment, the r1 level has represented bright attitude voltage, and r2 has then represented dark attitude voltage.Therefore, can see very clearly from Fig. 3 that the voltage swing of adjacent two data signal is identical, but polarity is opposite.By this, in 402 and 404, the summation of the voltage data signal that each pixel receives is almost 0 in unit area.In other words, the upper adjacent pixel of direction X can be offseted capacity coupled effect separately each other, so that common voltage Vcom at each regional magnitude of voltage of display panel about equally.By this, just can effectively solve the impact that crosstalk effect is brought.
The second embodiment
Fig. 5 shows the synoptic diagram according to the driving method of a kind of display panel of second embodiment of the invention, and Fig. 6 then shows the synoptic diagram according to pixel voltage value on a kind of display panel of second embodiment of the invention.Please merge with reference to figure 5 and Fig. 6, in the present embodiment, can provide equally the waveform of a plurality of data-signals, for example DS1, DS2, DS3 and DS4.Be in, voltage level size identical but opposite polarity two data-signals not necessarily will deliver in pel array adjacent two data lines different from the first embodiment.For example, data-signal DS1 and DS2 can deliver to respectively data line D1 and D2, and data-signal DS3 and DS4 are then delivered to respectively data line D3 and D4.Wherein, data line D1 and D2 and non-conterminous.Similarly, the data line that data line D3 and D4 neither be adjacent one another are.
Although the voltage level size is identical but opposite polarity two data-signals can be delivered to two data lines not adjacent to each other, voltage data signal value summation is essentially 0 in the unit area yet need to make.For example, in unit area 602 and 604, the voltage data signal value summation that each pixel receives is almost 0.By this, can be so that each regional common voltage Vcom of display panel be almost equal, to reduce the impact that crosstalk effect was caused in the display panel.
The 3rd embodiment
Fig. 7 shows the synoptic diagram according to the driving method of a kind of display panel of third embodiment of the invention, and Fig. 8 then shows the synoptic diagram according to pixel voltage value on a kind of display panel of third embodiment of the invention.Please merge with reference to figure 7 and Fig. 8, present embodiment and the second implementation of class all are with identical but opposite polarity two data-signals of voltage level size seemingly, deliver in the pel array in non-conterminous two data lines.For example, data-signal DS1 and DS2 are delivered to respectively data line D1 and D2, and data-signal DS3 and DS4 are then delivered to respectively data line D3 and D4.
Specifically, in the present embodiment, data-signal not only has level r1 and r2, and has level r3.Therefore, in the present embodiment more accurately gray scale and the brightness on the control display panel of driving method of the present invention.Similarly, present embodiment is in unit area, and for example in 602 and 604 zones, the voltage data signal value summation that each pixel receives in fact all is to be 0.By this, can be so that each regional common voltage Vcom of display panel be almost equal, to suppress the impact that crosstalk effect was caused in the display panel.
The 4th embodiment
Fig. 9 shows the synoptic diagram according to the driving method of a kind of display panel of fourth embodiment of the invention, and Figure 10 then shows the synoptic diagram according to pixel voltage value on a kind of display panel of fourth embodiment of the invention.Please merge with reference to figure 9 and Figure 10, in the present embodiment, the every delegation (Column) in the pel array couples respectively many data lines.Pixel on Y1 is capable couples respectively data line D1 and D2, and the pixel on Y2 is capable then couples respectively D3 and D4.In the present embodiment, data line D1 can be same data line or different data lines with D2 and data line D3 with D4.
Similarly, present embodiment also provides a plurality of data-signals, for example DS1, DS2, DS3 and DS4.Every delegation pixel in the pel array in the present embodiment can utilize respectively a plurality of data-signal to drive.For example, data-signal DS1 and DS2 can input to respectively data line D1 and D2, with respectively from first pixel on Y1 is capable and last pixel, drive the pixel of Y1 on capable.Can very clearly find out from Figure 10, the magnitude of voltage of the data-signal that M pixel of every delegation pixel receives, the magnitude of voltage size of the data-signal that receives with M+k pixel of this row is identical, and but polarity is opposite, and wherein M and k can be positive integers.By this, just can make the pixel in the per unit zone, the voltage data signal value summation that for example each pixel receives in the zone 1002 and 1004 is essentially 0.
The 5th embodiment
Figure 11 shows the synoptic diagram of pixel voltage value on the display panel in different pictures according to fifth embodiment of the invention a kind of.Please refer to Figure 11, it is 0 that present embodiment not only spatially makes the summation of the voltage data signal value that each pixel receives in the unit area, and each is within a unit interval, so that the summation of the voltage data signal value that the pixel of each relative position receives is 0.In detail, the present invention can produce a plurality of pictures, for example F1, F2, F3, F4, F5 and F6 in the present embodiment within a unit interval.In addition, adjust voltage swing and the polarity of the data-signal that pel array receives in each picture, so that the magnitude of voltage summation of the pixel received data signal of relative position is 0 in these pictures.For example, the summation of the magnitude of voltage of received data signal is essentially 0 in the picture of pixel 1102 within the single time.
In order further to solve color offset phenomenon, in the present embodiment, each pixel receives the number of times that the magnitude of voltage of the data-signal of the dark attitude of representative is repeated within the unit interval, the number of times that can be repeated greater than the magnitude of voltage of the data-signal of the bright attitude of representative.Take pixel 1102 as example, its magnitude of voltage " 1 " or "+1 " that receives the data-signal of the dark attitude of representative has been repeated 4 times, is respectively picture F1, F2, F4 and F5.Relatively, has then repeated 2 times its magnitude of voltage " 2 " or "+2 " that receive the data-signal of the bright attitude of representative, is respectively picture F3 and F6.By this, the present invention can also further solve the phenomenon of colour cast in the picture except can effectively reducing the impact that the cross-talk phenomenon is brought.
Figure 12 shows the synoptic diagram according to the driving method of a kind of display panel of fifth embodiment of the invention, and Figure 13 then shows the synoptic diagram of pixel voltage value on the display panel in same picture according to fifth embodiment of the invention a kind of.Please merge with reference to Figure 12 and Figure 13, in the present embodiment, equally also provide a plurality of data-signals, for example data-signal DS1, DS2, DS3 and DS4.Wherein, data-signal DS1 and DS2 can be delivered to respectively data line D1 and D2, and data-signal DS3 and DS4 then can be delivered to respectively data line D3 and D4.Identical with the above embodiments, in each same frame of present embodiment, the summation of the voltage data signal value that each pixel receives in the unit area in fact all is 0.For example, in the unit area 1302 and 1304, the summation of the voltage data signal value that each pixel receives is almost 0.By this, just can make common voltage Vcom no matter in any zone of display panel, all have haply identical magnitude of voltage, and effectively suppress the impact that crosstalk effect is brought.
In addition, in the present embodiment, except can be at the more dark attitude voltage of different Time alignments.Select in the picture of single time, to arrange more dark attitude voltage among the embodiment at some.For example in Figure 12, the number of pixel that the number that receives the pixel of dark attitude voltage receives bright attitude voltage is many significantly.By this, the method that provides of present embodiment also can solve the problem of colour cast effectively.
Although above-mentionedly provide a plurality of embodiment that spirit of the present invention is described, the present invention is not limited with above-mentioned.It will be appreciated by those skilled in the art that the main spirit of the present invention is to be adjusted in the unit area, the cross-pressure of the liquid crystal capacitance of each pixel, but so that the cross-pressure of each pixel and the pixel of another relative position big or small identical polarity is opposite each other.Therefore, so long as adjust the cross-pressure of the liquid crystal capacitance of pixel, be 0 means and make the summation of the voltage data signal value that each pixel receives in the unit area, be the scope that the present invention protects.
In sum, be 0 owing to the present invention can make the summation of the voltage data signal value that each pixel receives in the unit area.Therefore, the present invention can solve the impact that crosstalk effect is brought effectively.In addition, because the present invention only is the cross-pressure of adjusting the liquid crystal capacitance of each pixel, therefore only need revises the drive pattern of firmware, and not need to change the structure of hardware.The present invention does not need to expend too large cost, and does not have the means of too complex yet.
Although the present invention discloses as above with embodiment; but it is not to limit the present invention, those skilled in the art, under the premise without departing from the spirit and scope of the present invention; when can doing various changes and modification, so protection scope of the present invention should be as the criterion with claim of the present invention.
Claims (1)
1. the driving method of a display panel comprises the following steps:
Produce a plurality of data-signals, drive a plurality of pixels in this display panel, wherein said pixel is arranged with array way, and forms a pel array; And
Adjust polarity of voltage and the size of described data-signal, so that the voltage data signal value summation essence in a unit area of this display panel is 0,
Wherein making voltage data signal summation essence in this unit area is 0 step, comprises the following steps:
According to described data-signal, within a unit interval, produce a plurality of pictures; And
Adjust voltage swing and the polarity of described data-signal, so that the magnitude of voltage summation essence of the pixel of same position is 0 in should the unit interval inherent described picture,
Wherein within this unit interval, each described pixel-by-pixel basis is received the number of times that the magnitude of voltage of the data-signal of the dark attitude of representative is repeated, the number of times that is repeated greater than the magnitude of voltage of the data-signal of the bright attitude of representative.
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| CN 201110103039 CN102176091B (en) | 2008-03-18 | 2008-03-18 | Driving method of display panel |
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| CN 201110103039 CN102176091B (en) | 2008-03-18 | 2008-03-18 | Driving method of display panel |
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| CNA2008100830257A Division CN101246272A (en) | 2008-03-18 | 2008-03-18 | Method for driving display panel |
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| CN102176091B true CN102176091B (en) | 2013-10-30 |
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Cited By (1)
| 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 |
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| CN1440012A (en) * | 2002-02-18 | 2003-09-03 | 美能达株式会社 | Liquid-crystal display devices |
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| CN1959777A (en) * | 2006-10-30 | 2007-05-09 | 友达光电股份有限公司 | Method for driving display, and a photoelectric device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004226522A (en) * | 2003-01-21 | 2004-08-12 | Hitachi Displays Ltd | Display device and driving method therefor |
| TWI251189B (en) * | 2004-03-18 | 2006-03-11 | Novatek Microelectronics Corp | Driving method of liquid crystal display panel |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1355914A (en) * | 1999-03-03 | 2002-06-26 | 秦内蒂克有限公司 | Addressing bistable metatic liquid crystal devices |
| CN1440012A (en) * | 2002-02-18 | 2003-09-03 | 美能达株式会社 | Liquid-crystal display devices |
| CN1877405A (en) * | 2005-06-10 | 2006-12-13 | 恩益禧电子股份有限公司 | Liquid crystal displaying apparatus using data line driving circuit |
| CN1959777A (en) * | 2006-10-30 | 2007-05-09 | 友达光电股份有限公司 | Method for driving display, and a photoelectric device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102162944A (en) * | 2008-03-18 | 2011-08-24 | 友达光电股份有限公司 | Display panel driving method |
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