CN101819752A - Electrophoresis display device and driving method thereof - Google Patents
Electrophoresis display device and driving method thereof Download PDFInfo
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- CN101819752A CN101819752A CN 201010145634 CN201010145634A CN101819752A CN 101819752 A CN101819752 A CN 101819752A CN 201010145634 CN201010145634 CN 201010145634 CN 201010145634 A CN201010145634 A CN 201010145634A CN 101819752 A CN101819752 A CN 101819752A
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Abstract
The invention relates to an electrophoresis display device and a driving method thereof for displaying a first picture and a second picture without residual edge shadows. The method comprises the following steps of: setting a sharing voltage as a first voltage during displaying the first picture, applying a second voltage different from the first voltage to a first pixel so as to write a first data signal in the first pixel and applying the first voltage to a second pixel adjacent to the first pixel to keep a second data signal different from the first data signal in the second pixel; and setting the sharing voltage as the second voltage during displaying the second picture next to the first picture, applying the first voltage to the first pixel to write the second data signal in the first pixel and applying the first voltage to the second pixel to keep the second data signal of the second pixel. The electrophoresis display device and the driving method thereof avoid the residual edge shadows and improve the display quality.
Description
Technical field
The present invention refers to a kind of electrophoretic display apparatus and its driving method of avoiding residual edge shadows especially about a kind of electrophoretic display apparatus and its driving method.
Background technology
Advantages such as flat display apparatus (Flat Panel Display) has that external form is frivolous, power saving and low radiation are so be widely used on the electronic products such as computer screen, mobile phone, PDA(Personal Digital Assistant), flat-surface television.In in recent years, the display dealer has developed electrophoresis type display (claiming Electronic Paper again, Electronic Paper) in addition, so that more frivolous, soft and portable display further to be provided.Generally speaking, electrophoretic display apparatus comprises gate driver circuit, data drive circuit and a plurality of pixel.Gate driver circuit is used to provide a plurality of signals, and data drive circuit is to be used to provide a plurality of data-signals.A plurality of charged particles that each pixel has data switch, electrophoretic medium and is suspended in electrophoretic medium, the color of wherein a plurality of electrochondria is different from the color of electrophoretic medium.Data switch is according to the running that writes of signal control data signal, change the voltage difference at electrophoretic medium two ends according to this and adjust the levitation position of a plurality of charged particles in electrophoretic medium, so by the color contrast between a plurality of charged particles and the electrophoretic medium to represent required pixel gray level.
Fig. 1 is the existing synoptic diagram that is used for the driving method embodiment of electrophoretic display apparatus.As shown in Figure 1, in the time that shows the N picture, i pixel and (i+1) pixel are used for showing black grey scale, this moment share voltage Vcom and pixel voltage VDi, VDi+1 is positive voltage Vpos to keep black grey scale, and rest on the position near pixel electrode 101,102 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel and (i+1) pixel.In the time that shows (N+1) picture, share voltage Vcom switches to negative voltage Vneg, the i pixel is used for the display white GTG, (i+1) pixel is used for showing black grey scale, that is the GTG of i pixel is converted to white GTG from black grey scale, and the GTG of (i+1) pixel then maintains black grey scale.At this moment, pixel voltage VDi+1 changes to negative voltage Vneg along with the switching of share voltage Vcom, makes the position near pixel electrode 102 that can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel.Then maintain positive voltage Vpos as for pixel voltage VDi, and the electric field that the negative voltage Vneg of positive voltage Vpos by pixel electrode 101 and shared electrode 103 is set up will move to the position near shared electrode 103 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.
In the time that shows (N+2) picture, share voltage Vcom switches to positive voltage Vpos, i pixel and (i+1) pixel all are used for showing black grey scale, that is the GTG of i pixel is converted to black grey scale from white GTG, and the GTG of (i+1) pixel then maintains black grey scale.At this moment, pixel voltage VDi+1 changes to positive voltage Vpos along with the switching of share voltage Vcom, makes the position near pixel electrode 102 that still can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel.Then switch to negative voltage Vneg as for pixel voltage VDi, and the electric field that the positive voltage Vpos of negative voltage Vneg by pixel electrode 101 and shared electrode 103 is set up will move to the position near pixel electrode 101 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.Note that in the display setting process of (N+2) picture the electric field that pixel electrode 101 edges of adjacent pixels electrode 102 are set up can the serious dispersion because of the positive voltage Vpos of pixel electrode 102.So, GTG in the i pixel is converted to the process of black grey scale from white GTG, the a plurality of charged particles 199 that stay in i pixel and (i+1) pixel joining edge are not moved into the position near pixel electrode 101 of electrophoretic medium 190, so can cause the residual edge shadows phenomenon and reduce display quality.
Fig. 2 is the existing synoptic diagram that is used for another driving method embodiment of electrophoretic display apparatus.As shown in Figure 2, in the time that shows the N picture, i pixel and (i+1) pixel are used for the display white GTG, this moment share voltage Vcom and pixel voltage VDi, VDi+1 is negative voltage Vneg keeping white GTG, and rests on the position near shared electrode 103 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel and (i+1) pixel.In the time that shows (N+1) picture, share voltage Vcom switches to positive voltage Vpos, the i pixel is used for showing black grey scale, (i+1) pixel is used for the display white GTG, that is the GTG of i pixel is converted to black grey scale from white GTG, and the GTG of (i+1) pixel then maintains white GTG.At this moment, pixel voltage VDi+1 changes to positive voltage Vpos along with the switching of share voltage Vcom, makes the position near shared electrode 103 that can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel.Then maintain negative voltage Vneg as for pixel voltage VDi, and the electric field that the positive voltage Vpos of negative voltage Vneg by pixel electrode 101 and shared electrode 103 is set up will move to the position near pixel electrode 101 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.
In the time that shows (N+2) picture, share voltage Vcom switches to negative voltage Vneg, i pixel and (i+1) pixel all are used for the display white GTG, that is the GTG of i pixel is converted to white GTG from black grey scale, and the GTG of (i+1) pixel then maintains white GTG.At this moment, pixel voltage VDi+1 changes to negative voltage Vneg along with the switching of share voltage Vcom, makes the position near shared electrode 103 that still can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel.Then switch to positive voltage Vpos as for pixel voltage VDi, and the electric field that the negative voltage Vneg of positive voltage Vpos by pixel electrode 101 and shared electrode 103 is set up will move to the position near shared electrode 103 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.In like manner, in the display setting process of (N+2) picture, the electric field that pixel electrode 101 edges of adjacent pixels electrode 102 are set up can the serious dispersion because of the negative voltage Vneg of pixel electrode 102.So, GTG in the i pixel is converted to the process of white GTG from black grey scale, the a plurality of charged particles 299 that stay in i pixel and (i+1) pixel joining edge are not moved into the position near shared electrode 103 of electrophoretic medium 190, so also can cause the residual edge shadows phenomenon and reduce display quality.
Summary of the invention
According to embodiments of the invention, it discloses a kind of driving method of electrophoretic display apparatus, avoids residual edge shadows according to this and improves display quality.This kind driving method comprises: in first image time, setting share voltage is first voltage; In first image time, apply differ from first voltage second voltage in first pixel, according to this first data-signal is write first pixel; In first image time, apply second pixel of first voltage, in order to keep second data-signal that differs from first data-signal of second pixel in adjacent first pixel; In continuing mutually in second image time of first image time, setting share voltage is second voltage; In second image time, apply first voltage in first pixel, according to this second data-signal is write first pixel; And in second image time, apply first voltage in second pixel, in order to keep second data-signal of second pixel.
According to embodiments of the invention, it discloses a kind of driving method of electrophoretic display apparatus in addition, avoids residual edge shadows according to this and improves display quality.This kind driving method comprises: in first image time, setting share voltage is first voltage; In first image time, first data-signal is write first pixel; In first image time, apply second pixel of first driving voltage in adjacent first pixel, according to this second data-signal is write second pixel; Judge whether second data-signal differs from first data-signal; In continuing mutually in second image time of first image time, setting share voltage is second voltage that differs from first voltage; In second image time, second data-signal is write first pixel; And in second image time, apply second driving voltage in second pixel, keep second data-signal of second pixel according to this; Wherein if second data-signal differs from first data-signal, then second driving voltage is same as first driving voltage.
The present invention discloses a kind of electrophoretic display apparatus of avoiding residual edge shadows in addition, and it comprises data-driven unit and pixel-array unit.The data-driven unit be used for receiving in regular turn corresponding to a plurality of first data-signals of first picture with corresponding to a plurality of second data-signals of second picture of continuous first picture mutually, and provide a plurality of first driving voltages and a plurality of second driving voltages that are used for showing second picture that are used for showing first picture according to this in regular turn.The data-driven unit comprises GTG edge analysis unit and voltage provides the unit.GTG edge analysis unit is used for analyzing a plurality of first data-signals judging whether the first adjacent pixel and second pixel have different data-signal in first picture, and analyzes a plurality of second data-signals to judge whether first pixel and second pixel have equalized data signal in second picture.Voltage provides the unit to be electrically connected on GTG edge analysis unit, it is used to provide a plurality of first driving voltages corresponding to a plurality of first data-signals, and according to the analysis result of GTG edge analysis unit and a plurality of second data-signal so that a plurality of second driving voltages to be provided.Pixel-array unit is electrically connected on the data-driven unit, be used for according to the share voltage of a plurality of first driving voltages and tool first voltage showing first picture, and the share voltage of second voltage that differs from first voltage according to a plurality of second driving voltages and tool is to show second picture.Pixel-array unit comprises first pixel and second pixel.In the running of electrophoretic display apparatus, if GTG edge analysis unit judges first pixel and second pixel have different data-signal in first picture, and first pixel and second pixel have equalized data signal in second picture, then the GTG in first pixel or second pixel keeps in the running, voltage provides the unit to provide to be used for and carries out the driving voltage that this GTG keeps running, the identical voltage of maintenance in two image times that show first picture and second picture in regular turn.
The driving method that is used for electrophoretic display apparatus provided by the invention, if two adjacent first and second pixels in first picture have different luma data signal, and has the same gray level data-signal in first and second pixel that continues second picture of first picture mutually, then the GTG in first pixel or second pixel keeps in the running, in order to carry out driving voltage that this GTG the keeps running identical voltage of maintenance in two image times that show first picture and second picture in regular turn, avoid residual edge shadows according to this and improve display quality.
Description of drawings
Fig. 1 is the existing synoptic diagram that is used for the driving method embodiment of electrophoretic display apparatus.
Fig. 2 is the existing synoptic diagram that is used for another driving method embodiment of electrophoretic display apparatus.
Fig. 3 is used for the synoptic diagram of the first driving method embodiment of electrophoretic display apparatus for the present invention.
Fig. 4 is the associated voltage oscillogram of the first driving method embodiment shown in Figure 3, and wherein transverse axis is a time shaft.
Fig. 5 is used for the synoptic diagram of the second driving method embodiment of electrophoretic display apparatus for the present invention.
Fig. 6 is the associated voltage oscillogram of the second driving method embodiment shown in Figure 5, and wherein transverse axis is a time shaft.
Fig. 7 is the structural representation of an embodiment of electrophoretic display apparatus of the present invention.
Fig. 8 is the process flow diagram of the driving method of electrophoretic display apparatus shown in Figure 7.
Embodiment
Hereinafter according to electrophoretic display apparatus of the present invention and its driving method, cooperate appended graphic elaborating especially exemplified by embodiment, but the embodiment that is provided not is the scope that contains 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 reconfigures by method step, the method with impartial effect that produces is all the scope that the present invention is contained.
Fig. 3 is used for the synoptic diagram of the first driving method embodiment of electrophoretic display apparatus for the present invention.As shown in Figure 3, in the time that shows the N picture, i pixel and (i+1) pixel are used for showing black grey scale, this moment share voltage Vcom and pixel voltage VDi, VDi+1 is the first voltage Vx1 to keep black grey scale, and rest on the position near pixel electrode 101,102 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel and (i+1) pixel.In the time that shows (N+1) picture, share voltage Vcom switches to the second voltage Vx2 that differs from the first voltage Vx1, the i pixel is used for the display white GTG, (i+1) pixel is used for showing black grey scale, that is the GTG of i pixel is converted to white GTG from black grey scale, and the GTG of (i+1) pixel then maintains black grey scale.At this moment, pixel voltage VDi+1 changes to the second voltage Vx2 along with the switching of share voltage Vcom, makes the position near pixel electrode 102 that can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel.Then maintain the first voltage Vx1 as for pixel voltage VDi, and the electric field that the second voltage Vx2 of first voltage Vx1 by pixel electrode 101 and shared electrode 103 is set up will move to the position near shared electrode 103 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.
In the time that shows (N+2) picture, share voltage Vcom switches to the first voltage Vx1, i pixel and (i+1) pixel all are used for showing black grey scale, that is the GTG of i pixel is converted to black grey scale from white GTG, and the GTG of (i+1) pixel then maintains black grey scale.At this moment, pixel voltage VDi+1 maintains the second voltage Vx2, makes the position near pixel electrode 102 that can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel according to this.That is in the handoff procedure of (N+1) picture to the (N+2) picture, pixel voltage VDi+1 does not change to the first voltage Vx1 along with the switching of share voltage Vcom.Then switch to the second voltage Vx2 as for pixel voltage VDi, and the electric field that the first voltage Vx1 of second voltage Vx2 by pixel electrode 101 and shared electrode 103 is set up will move to the position near pixel electrode 101 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.
Please note, in the display setting process of (N+2) picture, pixel voltage VDi and pixel voltage VDi+1 are the second voltage Vx2, so pixel electrode 101,102 and shared electrode 103 between can set up substantially electric field uniformly, this electric field can all move to a plurality of charged particles corresponding to the i pixel position near pixel electrode 101 of electrophoretic medium 190, and a plurality of charged particles corresponding to (i+1) pixel are stayed in the position near pixel electrode 102 of electrophoretic medium 190.From the above, the electric field that pixel electrode 101 edges of adjacent pixels electrode 102 are set up can't seriously disperse, that is can be not residual and cause the residual edge shadows phenomenon at pixel edge generation charged particle, so high display quality can be provided.
Fig. 4 is the associated voltage oscillogram of the first driving method embodiment shown in Figure 3, and wherein transverse axis is a time shaft.In Fig. 4, basipetal signal is respectively share voltage Vcom, pixel voltage VDi and pixel voltage VDi+1.In the N image time, share voltage Vcom, pixel voltage VDi and pixel voltage VDi+1 are the first voltage Vx1, keep the black grey scale of i pixel and (i+1) pixel according to this.In (N+1) image time, share voltage Vcom and pixel voltage VDi+1 all switch to the second voltage Vx2 that is lower than the first voltage Vx1, pixel voltage VDi then maintains the first voltage Vx1, keep the black grey scale of (i+1) pixel according to this, and the GTG of i pixel is changed to white GTG from black grey scale.In one embodiment, the first voltage Vx1 is a positive polarity voltage, and the second voltage Vx2 is a reverse voltage.In (N+2) image time, share voltage Vcom switches to the first voltage Vx1, pixel voltage VDi switches to the second voltage Vx2, pixel voltage VDi+1 then maintains the second voltage Vx2, keep the black grey scale of (i+1) pixel according to this, and the GTG of i pixel is changed to black grey scale from white GTG.So in the maintenance running of the black grey scale of (i+1) pixel, in two image times that show (N+1) picture and (N+2) picture, pixel voltage VDi+1 remains unchanged.In other words, in the handoff procedure of (N+1) picture to the (N+2) picture, pixel voltage VDi+1 does not change with the switching of share voltage Vcom, and the high display quality of non-flanged ghost so can be provided.
Fig. 5 is used for the synoptic diagram of the second driving method embodiment of electrophoretic display apparatus for the present invention.As shown in Figure 5, in the time that shows the N picture, i pixel and (i+1) pixel are used for the display white GTG, this moment share voltage Vcom and pixel voltage VDi, VDi+1 is the first voltage Vy1 keeping white GTG, and rests on the position near shared electrode 103 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel and (i+1) pixel.In the time that shows (N+1) picture, share voltage Vcom switches to the second voltage Vy2 that differs from the first voltage Vy1, the i pixel is used for showing black grey scale, (i+1) pixel is used for the display white GTG, that is the GTG of i pixel is converted to black grey scale from white GTG, and the GTG of (i+1) pixel then maintains white GTG.At this moment, pixel voltage VDi+1 changes to the second voltage Vy2 along with the switching of share voltage Vcom, makes the position near shared electrode 103 that can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel.Then maintain the first voltage Vy1 as for pixel voltage VDi, and the electric field that the second voltage Vy2 of first voltage Vy1 by pixel electrode 101 and shared electrode 103 is set up will move to the position near pixel electrode 101 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.
In the time that shows (N+2) picture, share voltage Vcom switches to the first voltage Vy1, i pixel and (i+1) pixel all are used for the display white GTG, that is the GTG of i pixel is converted to white GTG from black grey scale, and the GTG of (i+1) pixel then maintains white GTG.At this moment, pixel voltage VDi+1 maintains the second voltage Vy2, makes the position near shared electrode 103 that can rest on electrophoretic medium 190 corresponding to a plurality of charged particles of (i+1) pixel according to this.That is in the handoff procedure of (N+1) picture to the (N+2) picture, pixel voltage VDi+1 does not change to the first voltage Vy1 along with the switching of share voltage Vcom.Then switch to the second voltage Vy2 as for pixel voltage VDi, and the electric field that the first voltage Vy1 of second voltage Vy2 by pixel electrode 101 and shared electrode 103 is set up will move to the position near shared electrode 103 of electrophoretic medium 190 corresponding to a plurality of charged particles of i pixel.
Please note, in the display setting process of (N+2) picture, pixel voltage VDi and pixel voltage VDi+1 are the second voltage Vy2, so pixel electrode 101,102 and shared electrode 103 between can set up substantially electric field uniformly, this electric field can all move to a plurality of charged particles corresponding to the i pixel position near shared electrode 103 of electrophoretic medium 190, and a plurality of charged particles corresponding to (i+1) pixel are stayed in the position near shared electrode 103 of electrophoretic medium 190.From the above, the electric field that pixel electrode 101 edges of adjacent pixels electrode 102 are set up can't seriously disperse, that is can be not residual and cause the residual edge shadows phenomenon at pixel edge generation charged particle, so high display quality can be provided.
Fig. 6 is the associated voltage oscillogram of the second driving method embodiment shown in Figure 5, and wherein transverse axis is a time shaft.In Fig. 6, basipetal signal is respectively share voltage Vcom, pixel voltage VDi and pixel voltage VDi+1.In the N image time, share voltage Vcom, pixel voltage VDi and pixel voltage VDi+1 are the first voltage Vy1, keep the white GTG of i pixel and (i+1) pixel according to this.In (N+1) image time, share voltage Vcom and pixel voltage VDi+1 all switch to the second voltage Vy2 that is higher than the first voltage Vy1, pixel voltage VDi then maintains the first voltage Vy1, keep the white GTG of (i+1) pixel according to this, and the GTG of i pixel is changed to black grey scale from white GTG.In one embodiment, the first voltage Vy1 is a reverse voltage, and the second voltage Vy2 is a positive polarity voltage.In (N+2) image time, share voltage Vcom switches to the first voltage Vy1, pixel voltage VDi switches to the second voltage Vy2, pixel voltage VDi+1 then maintains the second voltage Vy2, keep the white GTG of (i+1) pixel according to this, and the GTG of i pixel is changed to white GTG from black grey scale.So in the maintenance running of the white GTG of (i+1) pixel, in two image times that show (N+1) picture and (N+2) picture, pixel voltage VDi+1 remains unchanged so that the high display quality of non-flanged ghost to be provided.
By first and second driving method of the invention described above embodiment as can be known, when the i pixel of (N+1) picture and (i+1) pixel have different luma data signal, if the i pixel of (N+2) picture is identical with the luma data signal to be written of (i+1) pixel, then the GTG in (i+1) pixel keeps in the running, in two image times that show (N+1) picture and (N+2) picture, pixel voltage VDi+1 remains unchanged.That is to say that in the handoff procedure of (N+1) picture to the (N+2) picture, pixel voltage VDi+1 does not change with the switching of share voltage Vcom, the high display quality of non-flanged ghost so can be provided.Note that the GTG that is used for driving method of the present invention keeps running to be not limited to above-mentioned maintenance running to white GTG or black grey scale.
Fig. 7 is the structural representation of an embodiment of electrophoretic display apparatus of the present invention.As shown in Figure 7, electrophoretic display apparatus 700 comprise pixel-array unit 710, data-driven unit 720, with drive element of the grid 790.Data-driven unit 720 is electrically connected on pixel-array unit 710, be used for receiving in regular turn corresponding to a plurality of first data-signals of first picture with corresponding to a plurality of second data-signals of second picture of continuous first picture mutually, and provide a plurality of first driving voltages and a plurality of second driving voltages that are used for showing second picture that are used for showing first picture according to this in regular turn.Drive element of the grid 790 is electrically connected on pixel-array unit 710, is used to provide a plurality of signals to pixel-array unit 710.Pixel-array unit 710 according to a plurality of signals to control the running that writes of a plurality of driving voltages.
Pixel-array unit 710 comprises the first adjacent pixel and second pixel.Data-driven unit 720 comprises GTG edge analysis unit 730 provides unit 740 with voltage.GTG edge analysis unit 730 is used for analyzing a plurality of first data-signals judging whether first pixel and second pixel have different data-signal in first picture, and analyzes a plurality of second data-signals to judge whether first pixel and second pixel have equalized data signal in second picture.Voltage provides unit 740 to be electrically connected on GTG edge analysis unit 730, be used to provide a plurality of first driving voltages corresponding to a plurality of first data-signals, and according to the analysis result of GTG edge analysis unit 730 and a plurality of second data-signal so that a plurality of second driving voltages to be provided.Pixel-array unit 710 according to the share voltage of a plurality of first driving voltages and tool first voltage to show first picture, and the share voltage of second voltage that differs from first voltage according to a plurality of second driving voltages and tool is to show second picture, wherein share voltage can be provided by data-driven unit 720, or is provided by share voltage generator (not shown).
In the running of electrophoretic display apparatus 700, if GTG edge analysis unit 730 judges that first pixel and second pixel have different data-signal in first picture, and first pixel and second pixel have equalized data signal in second picture, then the GTG in first pixel or second pixel keeps in the running, voltage provides unit 740 to provide and is used for carrying out the driving voltage that this GTG keeps running, in two image times that show first picture and second picture in regular turn, keep identical voltage, avoid residual edge shadows according to this and improve display quality.
Fig. 8 is the process flow diagram of the driving method of electrophoretic display apparatus shown in Figure 7.Flow process 900 shown in Figure 8 is based on the driving method of above-mentioned first and second driving method embodiment with electrophoretic display apparatus that Fig. 7 is provided.The driving method of the electrophoretic display apparatus 700 shown in the flow process 900 comprises the following step:
Step S905: in first image time, setting share voltage is first voltage;
Step S910: in first image time, the data-driven unit writes first data-signal first pixel of pixel-array unit;
Step S915: in first image time, the data-driven unit applies second pixel of first driving voltage in adjacent first pixel, according to this second data-signal is write second pixel;
Step S920: whether GTG edge analysis unit judges second data-signal differs from first data-signal;
Step S925: in continuing mutually in second image time of first image time, setting share voltage is second voltage that differs from first voltage;
Step S930: in second image time, the data-driven unit writes this first pixel with second data-signal;
Step S935: in second image time, the data-driven unit applies first driving voltage in second pixel, keeps second data-signal of second pixel according to this;
Step S940: in continuing mutually in second image time of first image time, setting share voltage is second voltage that differs from first voltage;
Step S945: in second image time, the data-driven unit writes this first pixel with second data-signal; And
Step S950: in this second image time, the data-driven unit apply differ from first driving voltage second driving voltage in second pixel, keep second data-signal of second pixel according to this.
In the flow process 900 of the driving method of electrophoretic display apparatus 700, when first pixel and second pixel have different data-signal in first image time, if first pixel is identical with the to be written data-signal of second pixel in second image time, then the GTG in second pixel keeps in the running, second pixel keeps same pixel voltage in two image times of first image time and second image time, avoid residual edge shadows according to this and improve display quality.Note that pixel-array unit is written as a plurality of pixel voltages according to a plurality of signals with a plurality of driving voltages, that is each pixel voltage equals corresponding driving voltage in fact.When first pixel and second pixel have equalized data signal in first image time, if first pixel also is identical with the data-signal to be written of second pixel in second image time, then the GTG in second pixel keeps in the running, the pixel voltage of second pixel in first image time with second image time in different, that is the pixel voltage of second pixel changes with the switching of share voltage in the handoff procedure of first picture to the second picture.Differ among the embodiment of first data-signal at second data-signal, first data-signal is corresponding to black grey scale, and second data-signal is corresponding to white GTG.Differ among another embodiment of first data-signal at second data-signal, first data-signal is corresponding to white GTG, and second data-signal is corresponding to black grey scale.Yet the GTG of the driving method of electrophoretic display apparatus 700 keeps running to be not limited to the maintenance of white GTG or black grey scale is operated.
In sum, the driving method that is used for electrophoretic display apparatus in the present invention, if two adjacent first and second pixels in first picture have different luma data signal, and has the same gray level data-signal in first and second pixel that continues second picture of first picture mutually, then the GTG in first pixel or second pixel keeps in the running, in order to carry out driving voltage that this GTG the keeps running identical voltage of maintenance in two image times that show first picture and second picture in regular turn, avoid residual edge shadows according to this and improve display quality.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; any have a technical field of the invention know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (11)
1. the driving method of an electrophoretic display apparatus is characterized in that, described method comprises:
In one first image time, setting a shared voltage is one first voltage;
In described first image time, apply differ from described first voltage one second voltage in one first pixel, according to this one first data-signal is write described first pixel;
In described first image time, apply one second pixel of described first voltage, in order to keep one second data-signal of described first data-signal of differing from of described second pixel in adjacent described first pixel;
In continuing in one second image time of described first image time mutually, setting described share voltage is described second voltage;
In described second image time, apply described first voltage in described first pixel, according to this described second data-signal is write described first pixel; And
In described second image time, apply described first voltage in described second pixel, in order to keep described second data-signal of described second pixel.
2. driving method as claimed in claim 1 is characterized in that: the polarity of voltage of described first voltage is different from the polarity of voltage of described second voltage.
3. driving method as claimed in claim 1 is characterized in that, described method also comprises:
One electrophoretic medium is provided;
Provide a plurality of first charged particles in described electrophoretic medium; And
Provide a plurality of second charged particles in described electrophoretic medium.
4. driving method as claimed in claim 3 is characterized in that:
It is the position that described a plurality of first charged particles is urged to corresponding one first GTG in the described electrophoretic medium according to described first data-signal that described first data-signal is write described first pixel;
It is the position that described a plurality of first charged particles is urged to corresponding one second GTG in the described electrophoretic medium according to described second data-signal that described second data-signal is write described first pixel; And
Described second data-signal that keeps described second pixel is the position that keeps described a plurality of second charged particle corresponding described second GTG in described electrophoretic medium according to described second data-signal;
Wherein said second GTG is different from described first GTG.
5. driving method as claimed in claim 4 is characterized in that: described first GTG is a black grey scale, and described second GTG is a white GTG.
6. driving method as claimed in claim 4 is characterized in that: described first GTG is a white GTG, and described second GTG is a black grey scale.
7. the driving method of an electrophoretic display apparatus is characterized in that, described method comprises:
In one first image time, setting a shared voltage is one first voltage;
In described first image time, one first data-signal is write one first pixel;
In described first image time, apply one second pixel of one first driving voltage in adjacent described first pixel, according to this one second data-signal is write described second pixel;
Judge whether described second data-signal differs from described first data-signal;
In continuing in one second image time of described first image time mutually, setting described share voltage is one second voltage that differs from described first voltage;
In described second image time, described second data-signal is write described first pixel; And
In described second image time, apply one second driving voltage in described second pixel, keep described second data-signal of described second pixel according to this;
Wherein if described second data-signal differs from described first data-signal, then described second driving voltage is same as described first driving voltage.
8. driving method as claimed in claim 7 is characterized in that: described second data-signal differs from described first data-signal, and described first data-signal is corresponding to a black grey scale, and described second data-signal is corresponding to a white GTG.
9. driving method as claimed in claim 7 is characterized in that: described second data-signal differs from described first data-signal, and described first data-signal is corresponding to a white GTG, and described second data-signal is corresponding to a black grey scale.
10. an electrophoretic display apparatus is characterized in that, described device comprises:
One data-driven unit, be used for receiving in regular turn corresponding to a plurality of first data-signals of one first picture with corresponding to a plurality of second data-signals of one second picture of continuous described first picture mutually, and provide a plurality of first driving voltages that are used for showing described first picture and a plurality of second driving voltages that are used for showing described second picture according to this in regular turn, described data-driven unit comprises: a GTG edge analysis unit, be used for analyzing described a plurality of first data-signal judging whether one first adjacent pixel and one second pixel have different data-signal in described first picture, and analyze described a plurality of second data-signal to judge whether described first pixel and described second pixel have equalized data signal in described second picture; And one voltage the unit is provided, be electrically connected on described GTG edge analysis unit, be used to provide described a plurality of first driving voltages corresponding to described a plurality of first data-signals, and according to the analysis result of described GTG edge analysis unit and described a plurality of second data-signal so that described a plurality of second driving voltage to be provided; And
One pixel-array unit, be electrically connected on described data-driven unit, be used for sharing voltage to show described first picture according to one of described a plurality of first driving voltages and tool one first voltage, and the described share voltage of one second voltage that differs from described first voltage according to described a plurality of second driving voltages and tool to be to show described second picture, and described pixel-array unit comprises described first pixel and described second pixel;
Wherein if described first pixel of described GTG edge analysis unit judges and described second pixel have different data-signal in described first picture, and described first pixel and described second pixel have equalized data signal in described second picture, then the GTG in described first pixel or described second pixel keeps in the running, described voltage provides the unit to provide to be used for and carries out the driving voltage that described GTG keeps running, the identical voltage of maintenance in two image times that show described first picture and described second picture in regular turn.
11. electrophoretic display apparatus as claimed in claim 10 is characterized in that, described device also comprises:
One drive element of the grid is electrically connected on described pixel-array unit, is used to provide a plurality of signals;
Wherein said pixel-array unit is to carry out the running that writes of described a plurality of driving voltages according to described a plurality of signals.
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