CN103531154B - Electrophoretic display device (EPD) data driver - Google Patents
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Abstract
A kind of electrophoretic display device (EPD) data driver, comprise multiple drive sub-circuits, each drive sub-circuits comprises first, second and linearly fastens lock unit, first, second storage capacitors unit, multiplexing unit and comparing unit.First and second linearly fastens lock unit provides renewal fasten lock view data and fasten lock view data at present in response to raw image data respectively.When upgrade and fasten at present lock view data correspond to different level time, comparing unit controls multiplexing unit in first period, and optionally by first and second storage capacitors unit, one of them is coupled to drive end, to carry out electric charge recovery for pixel column, and optionally first and second storage capacitors unit wherein another is coupled to drive end, to carry out pre-charged according to electric charge to pixel column in the second phase.
Description
Technical field
The invention relates to a kind of data driver of electrophoretic display device (EPD) (ElectrophoreticDisplay, EPD), and particularly there is the EPD data driver of electric charge reclaim mechanism.
Background technology
In the epoch now that development in science and technology is maked rapid progress, display correlation technique, such as, be electrophoretic display device (EPD) (ElectrophoreticDisplay, EPD), be developed, with the life of convenient people.In general, EPD has such as high reflectance, highly continues when providing and stablize the characteristic of picture, and is widely used in e-book, to provide the display being similar to printed matter reading for user.But how to design for EPD the display driver mechanism having more power utilization, be one of direction that industry is constantly endeavoured.
Summary of the invention
According to a first aspect of the invention, propose a kind of electrophoretic display device (EPD) (ElectrophoreticDisplay, EPD) data driver, comprise multiple drive sub-circuits, each drive sub-circuits, via drive end, drives the pixel column (Column) of EPD in during driving.Each drive sub-circuits comprises output node, first, second linearly fastens lock unit, first, second storage capacitors unit, multiplexing unit and comparing unit.First and second is linearly fastened lock unit and fastens lock view data in response to raw image data storage renewal and fasten lock view data at present respectively, second linearly fastens lock unit is also provided to output node by fastening lock view data at present, each upgrade and fasten at present lock view data optionally correspond to positive polarity, negative polarity and ground connection datum one of them.Multiplexing unit is coupled to the first storage capacitors unit, the second storage capacitors unit, output node and drive end.Comparing unit is middle during driving to be divided during first, second and third.When upgrade and fasten at present lock view data correspond to different level time, comparing unit controls multiplexing unit in first period, and optionally by first and second storage capacitors unit, one of them is coupled to drive end, to carry out electric charge recovery for pixel column, and optionally first and second storage capacitors unit wherein another is coupled to drive end, to utilize this little electric charge to carrying out pre-charged to pixel column in the second phase.
According to a second aspect of the invention, propose another kind of EPD data driver, wherein also comprise multiple drive sub-circuits, each drive sub-circuits, via drive end, drives the pixel column (Column) of EPD in during driving.Each drive sub-circuits comprises output node, earthing power supply path, first, second linearly fastens lock unit, first, second storage capacitors unit, multiplexing unit and comparing unit.Earthing power supply path provides ground connection datum.First and second is linearly fastened lock unit and fastens lock view data in response to raw image data storage renewal and fasten lock view data at present respectively, second linearly fastens lock unit is also provided to output node by fastening lock view data at present, each upgrade and fasten at present lock view data optionally correspond to positive polarity, negative polarity and ground connection datum one of them.Multiplexing unit is coupled to the first storage capacitors unit, the second storage capacitors unit, output node, drive end and earthing power supply path.Comparing unit is middle during driving to be divided during first to fourth.When upgrade and fasten at present lock view data correspond to different level time, comparing unit controls multiplexing unit in first period, and optionally by first and second storage capacitors unit, one of them is coupled to drive end, to carry out electric charge recovery for pixel column, and optionally first and second storage capacitors unit wherein another is coupled to drive end, to utilize this little electric charge to carrying out pre-charged to pixel column in the second phase.Comparing unit also between the fourth phase in control multiplexing unit optionally earthing power supply path is coupled to drive end, between the fourth phase be wherein trigger during first and second between.
In order to have better understanding, preferred embodiment cited below particularly to above-mentioned and other side of the present invention, and coordinating institute's accompanying drawings, being described in detail below.
Accompanying drawing explanation
Fig. 1 illustrates the calcspar of the electrophoretic display device (EPD) implementing example according to.
Fig. 2 illustrates the detailed block diagram of the drive sub-circuits 10 (i) being Fig. 1.
It is the time sequential routine schematic diagram of drive sub-circuits 10_ (i) that Fig. 3 illustrates.
Fig. 4 illustrates the signal table of the multiplexing unit 111 according to the embodiment of the present invention.
Fig. 5 illustrates another signal table of the multiplexing unit 111 according to the embodiment of the present invention.
It is another coherent signal sequential chart of drive sub-circuits 10 (i) ' that Fig. 6 A-6F illustrates.
It is the detailed block diagram of drive sub-circuits 10 (i) ' that Fig. 7 illustrates.
Fig. 8 illustrates the operation signal table according to the multiplexing unit 111 ' of the embodiment of the present invention.
It is drive sub-circuits 10 (i) that Fig. 9 A-9F illustrates " coherent signal sequential chart.
It is drive sub-circuits 10 (i) that Figure 10 illustrates " detailed block diagram.
[main element label declaration]
1: electrophoretic display device (EPD) 10: data driver
20: electrophoretic display panel Rload, Cload: equivalent resistance, equivalent capacity
10_1,10_3: first, second linearly fastens lock circuit
10_5: level shift circuit 10_7: output buffer
10_9: comparator circuit 10_11: duplex circuit
N1-Nn: drive end
Cneg, Cpos, Cneg', Cpos': storage capacitors unit
10 (i), 10 (i) ', 10 (i) ": drive sub-circuits
101,103,101', 103': linearly fasten lock unit
105,105': electrical level shift units 107,107': export buffer cell
109,109': comparing unit 111,111': multiplexing unit
Nd: output node 113,113': earthing power supply path
Cpos_1, Cpos_2, Cneg_1, Cneg_2: sub-electric capacity
Embodiment
Electrophoretic display device (EPD) (ElectrophoreticDisplay, the EPD) data driver that the present embodiment proposes is switched by sequential multiplex (MUX), reclaims for the positive polarity on each pixel column and negative polarity electric charge.
Please refer to Fig. 1, it illustrates the calcspar of the electrophoretic display device (EPD) implementing example according to.The EPD1 of the present embodiment comprises data driver 10 and EPD panel 20.For example, EPD panel 20 has the pel array comprising m × n pixel, wherein m and n be greater than 1 natural number.Say further, EPD panel 20 and the existing EPD panel of the present embodiment have close structure, no longer repeat it in the present embodiment, and only represent with the equivalent resistance Rload of n pixel column in EPD panel 20 and equivalent capacity Cload.
Data driver 10 comprises first, second and linearly fastens lock circuit 10_1,10_3, level shift circuit 10_5, output buffer 10_7, comparator circuit 10_9 and duplex circuit 10_11.For example, aforementioned each circuit comprises n unit accordingly, its be formed accordingly n drive sub-circuits 10 (1), 10 (2) ..., 10 (n), its have respectively n drive end N1, N2 ..., Nn, to drive for the pixel column of the n in this pel array respectively.
Data driver 10 also has storage capacitors unit Cpos and Cneg, to reclaim for the electric charge on each n pixel column respectively.Because each drive sub-circuits has circuit structure identical in fact, next be only for the drive sub-circuits of i-th wherein, be further described the operation of each n drive sub-circuits in the data driver 10 of the present embodiment, wherein i is the natural number being less than or equal to n.
Please refer to Fig. 2, it illustrates the detailed block diagram of the drive sub-circuits 10 (i) being Fig. 1.Say further, drive sub-circuits 10 (i) comprise linearly fasten lock unit 101, linearly fasten lock unit 103, electrical level shift units 105, export buffer cell 107, comparing unit 109, multiplexing unit 111 and output node Nd.
Fasten the frame data that lock view data Vin_L ' and Vin_L can be considered as corresponding in raw image data Vin different sequential respectively.Linearly fasten lock unit 101 and receive raw image data Vin, and in response to the Loading Control signal HSP that outside time schedule controller (TimingController) provides, write the renewal corresponding to current timing cycles and fasten lock view data Vin_L.Linearly fasten the falling edge (FallingEdge) of the Loading Control signal LD that lock unit 103 provides in response to outside time schedule controller, write and fasten lock view data Vin_L ' at present.For example, the s-1 pen at present and in renewal Vin and s frame picture data, wherein s is natural number.
Electrical level shift units 105 and output buffer cell 107 also perform corresponding operation, to provide drive singal Vd to output node Nd for fastening lock view data Vin_L ' at present accordingly.For example, raw image data Vin, at present and upgrade fasten lock view data Vin_L ' and Vin_L optionally correspond to positive polarity, negative polarity and ground connection datum VPOS, VNEG and GND tri-level one of them, and the drive singal Vd be converted to corresponding to it optionally correspond to+15 volts (Volt, V) ,-15V and GND tri-level one of them.
Multiplexing unit 111 such as has 4 input ends and output terminal, and wherein input end is coupled to storage capacitors unit Cpos, Cneg, earthing power supply path 113 and output node Nd respectively, and output terminal is coupled to drive end Ni.
Comparing unit 109 divides period W1, W2, W3 and W4 in order in driving period TP, as shown in Figure 3.Comparing unit 109 also fastens the level of lock view data Vin_L ' and Vin_L with reference to current and renewal, provide control signal IC to switch to control multiplexing unit 111 in aforementioned period W1-W4, carries out time division multiplexing by this drive operation for i-th pixel column.When at present and upgrade fasten lock view data Vin_L ' and Vin_L correspond to different level time, represent that drive sub-circuits 10 (i) must drive for drive singal Vd, to switch its level.
Accordingly, comparing unit 109 controls multiplexing unit 111 in period W1, and optionally by storage capacitors unit Cpos and Cneg, one of them is coupled to drive end Ni, to carry out electric charge recovery for this i-th pixel column.Storage capacitors unit Cpos and Cneg wherein another is also optionally coupled to drive end Ni by comparing unit 109 in period W2, reclaims electric charge a bit to carrying out pre-charged to this i-th pixel column to utilize this.Control multiplexing unit 111 also in period W3, output node Ni is coupled to drive end Nd, to drive for this i-th pixel column.So, perform aforementioned blocked operation via driving multiplexing unit 111, effectively can reduce the power dissipation of drive sub-circuits 10 (i).
Please refer to Fig. 4, it illustrates the operation signal table of the multiplexing unit 111 according to the embodiment of the present invention.Next will enumerate some operational instances, be further described for the blocked operation of multiplexing unit 111 at each period W1-W4.
Please refer to the operational instances of numbering #2 and #8 in Fig. 4.When to fasten lock view data Vin_L ' at present and correspond to positive polarity datum VPOS and at present and upgrade fasten lock view data Vin_L ' and Vin_L correspond to different level time, the initial level representing drive singal Vd is positive polarity datum VPOS, and termination level be negative polarity and ground connection datum VNEG and GND one of them.Accordingly, comparing unit 109 controls multiplexing unit 111 and storage capacitors unit Cpos is coupled to drive end Ni in period W1, to be recycled in storage capacitors unit Cpos by the positive polarity electric charge in this i-th pixel column.
Please refer to the operational instances of numbering #4 and #6 in Fig. 4.When renewal fasten lock view data Vin_L correspond to positive polarity datum VPOS and at present and upgrade fasten lock view data Vin_L ' and Vin_L correspond to different level time, the termination level representing drive singal Vd is positive polarity datum VPOS, and initial level be negative polarity and ground connection datum VNEG and GND one of them.Accordingly, comparing unit 109 controls multiplexing unit 111 and storage capacitors unit Cpos is coupled to drive end Ni in period W2, carries out pre-charged to utilize the positive polarity electric charge in storage capacitors unit Cpos to this i-th pixel column.
Please refer to the operational instances of numbering #3 and #6 in Fig. 4.When to fasten lock view data Vin_L ' at present and correspond to negative polarity datum VNEG and at present and upgrade fasten lock view data Vin_L ' and Vin_L correspond to different level time, the initial level representing drive singal Vd is negative polarity datum VNEG, and termination level be positive polarity and ground connection datum VPOS and GND one of them.Accordingly, comparing unit 109 controls multiplexing unit 111 and storage capacitors unit Cneg is coupled to drive end Ni in period W1, to be recycled in storage capacitors unit Cneg by the negative polarity electric charge in this i-th pixel column.
Please refer to the operational instances of numbering #7 and #8 in Fig. 4.When renewal fasten lock view data Vin_L correspond to negative polarity datum VNEG and at present and upgrade fasten lock view data Vin_L ' and Vin_L correspond to varying level time, the termination level representing drive singal Vd is negative polarity datum VNEG, and initial level be positive polarity and ground connection datum VPOS and GND one of them.Accordingly, comparing unit 109 controls multiplexing unit 111 and storage capacitors unit Cneg is coupled to drive end Ni in period W2, discharges in advance to this i-th pixel column to utilize the negative polarity electric charge in storage capacitors unit Cneg.
Please refer to the operational instances of numbering #4 and #7 in Fig. 4.When to fasten lock view data Vin_L ' at present and correspond to ground connection electricity datum GND, represent that the initial level of drive singal Vd is ground connection datum GND.Accordingly, comparing unit 109 controls multiplexing unit 111 and earthing power supply path 113 is coupled to drive end Ni in period W1.Please refer to the operational instances of numbering #1-#3 in Fig. 4.
Please refer to the operational instances of numbering #2 and #3 in Fig. 4.Similarly, when renewal fasten lock view data Vin_L correspond to ground connection electricity datum GND time, represent that the termination level of drive singal Vd is ground connection datum GND.Accordingly, comparing unit 109 controls multiplexing unit 111 and earthing power supply path 113 is coupled to drive end Ni in period W2.
Please refer to the operational instances of numbering #1 in Fig. 4.When at present and upgrade fasten lock view data Vin_L ' and Vin_L all correspond to ground connection datum GND time, represent that drive singal Vd can not be switched, and will there is fixing level constantly.Accordingly, comparing unit 109 controls multiplexing unit 111 and output node Nd is coupled to earthing power supply path 113 in period W1 and W2.
Please refer to the operational instances of numbering #5 and #9 in Fig. 4.When at present and upgrade fasten lock view data Vin_L ' and Vin_L all correspond to positive polarity datum VPOS time, represent that drive singal Vd can not be switched, and drive sub-circuits 10 (i) need not provide any driving force for this i-th pixel column driving in period TP.Accordingly, comparing unit 109 controls multiplexing unit 111 and output node Nd is coupled to drive end Ni in period W1 and W2.Similarly, when at present and upgrade fasten lock view data Vin_L ' and Vin_L all correspond to negative polarity datum VNEG time, comparing unit 109 controls multiplexing unit 111 and output node Nd is coupled to drive end Ni in period W1 and W2.
More than comprehensive, positive polarity on this i-th pixel column and negative polarity electric charge can be recycled in storage capacitors unit Cpos and Cneg in period W1 by the drive sub-circuits 10 (i) of the present embodiment respectively, and the positive polarity in storage capacitors unit Cpos and Cneg and negative polarity electric charge are again utilized in period W2.The drive sub-circuits 10 (i) of the present embodiment also can at period W3, namely be after aforementioned charge feedback and recycling operate, output node Nd is coupled to drive end Ni, drives for this i-th pixel column to apply drive sub-circuits 10 (i).
Period W4 triggers between period W1 and W2, and earthing power supply path 113 is optionally coupled to drive end Ni in wherein controlling multiplexing unit 111 by comparing unit 109.
Please refer to the operational instances of numbering #1-#4 and #6-#8 in Fig. 4.Say further, when at present and upgrade and fasten lock view data Vin_L ' and Vin_L and entirely do not correspond to positive polarity datum VPOS (being namely numbering #5 other operational instances outward), or when entirely not corresponding to negative polarity datum VNEG (being namely numbering #9 other operational instances outer), comparing unit 109 controls multiplexing unit 111 and earthing power supply path 113 is coupled to drive end Ni in period W4, to provide ground connection reference voltage so far i-th pixel column accordingly.
Please refer to the operational instances of numbering #5 and #9 in Fig. 4.Relatively, when at present and upgrade fasten lock view data Vin_L ' and Vin_L all correspond to positive polarity datum VPOS time, comparing unit 109 controls multiplexing unit 111 and output node Nd is coupled to drive end Ni in period W4; When at present and upgrade fasten lock view data Vin_L ' and Vin_L all correspond to negative polarity datum VNEG time, comparing unit 109 controls multiplexing unit 111 and output node Nd is coupled to drive end Ni in period W4.
In the present embodiment, though only the situation driving period TP to be divided into four period W1-W4 explained for comparing unit 109, so, the data driver 10 of the present embodiment is not limited thereto.In another example, the comparing unit 109 of the present embodiment also can omit the planning of period W4, and in 3 period W1-W3, complete corresponding driving operation, as shown in Figure 5.
In another example, the storage capacitors unit Cpos ' of the present embodiment such as comprise two or more sub-electric capacity Cpos_1, Cpos_2 ..., Cpos_k, and storage capacitors unit Cneg ' such as comprise two or more sub-electric capacity Cneg_1, Cneg_2 ..., Cneg_k, wherein k be greater than 1 natural number, as shown in Figure 7.
In this example, multiplexing unit 111 ' has 2k+2 input end accordingly, to be coupled to k sub-electric capacity Cpos_1-Cpos_k, Cneg_1-Cneg_k, output node Nd and earthing power supply path 113 ' respectively.In addition, period W1 and W2 also further can be divided into multiple son period W1_1-W1_k and k son period W2_1-W2_k by comparing unit 109 respectively, as shown in Figure 8.
Say further, in each k son period W1_1-W1_k, the sub-electric capacity Cpos_1-Cpos_k of correspondence or sub-electric capacity Cneg_1-Cneg_k is connected to drive end Ni by comparing unit 109 ' respectively, so that the positive polarity electric charge on this i-th pixel column is recycled in each sub-electric capacity Cpos_1-Cpos_k, and the negative polarity electric charge on this i-th pixel column is recycled in each sub-electric capacity Cneg_1-Cneg_k.In each k son period W2_1-W2_k, the sub-electric capacity Cpos_1-Cpos_k of correspondence or sub-electric capacity Cneg_1-Cneg_k is connected to drive end Ni by comparing unit 109 ' respectively, the recovery positive polarity of depositing wherein and negative polarity electric charge are provided so far on i-th pixel column, to carry out pre-charged or discharge operation in advance for it.
Accordingly, by the blocked operation of aforementioned son period W1_1-W1_k and W2_1-W2_k, the drive sub-circuits 10 (i) ' of the present embodiment also can reclaim and recycling operation for the electric charge that realizes on this i-th pixel column.
Please refer to Fig. 9 A-9F, it illustrates the coherent signal sequential chart of the drive sub-circuits 10 (i) ' being Fig. 7.Equal the example of 2 with k, in Fig. 8, the coherent signal oscillogram of the operational instances of numbering #2-#4 and #6-#8 is respectively as shown in Fig. 9 A-9F.
Please refer to Figure 10 and 6A-6F figure, wherein Figure 10 illustrates is drive sub-circuits 10 (i) " detailed block diagram, wherein Fig. 6 A-6F illustrates is the drive sub-circuits 10 (i) of Figure 10 " coherent signal sequential chart.In another example, the operational instances of Fig. 9 A-9F also can omit period W4, and only operation period TP is divided into W1_1, W1_2, W2_1, W2_2 and W3, and in wherein carrying out corresponding driving operation.
In sum, although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on the appended right person of defining.
Claims (13)
1. an electrophoretic display device (EPD) data driver, comprises multiple drive sub-circuits, and each the plurality of drive sub-circuits is via a drive end, and drive a pixel column of an electrophoretic display device (EPD) in during one drives, wherein respectively this drive sub-circuits comprises:
One output node;
One first linearly fastens lock unit and one second linearly fastens lock unit, fasten lock view data and in response to raw image data storage one renewal respectively and fasten lock view data at present, this second linearly fasten lock unit also this is fastened at present lock view data be provided to this output node, respectively this renewal and this fasten at present lock view data optionally correspond to a positive polarity, a negative polarity and a ground connection datum one of them;
One first storage capacitors unit and one second storage capacitors unit;
One multiplexing unit, is coupled to this first storage capacitors unit, this second storage capacitors unit, this output node and this drive end; And
One comparing unit, divide in during this driving between one first, one second and one third phase, this comparing unit also in this renewal and this fasten at present lock view data correspond to different level time, control in this first period this multiplexing unit optionally by this first and this second storage capacitors unit one of them be coupled to this drive end, to reclaim the electric charge on this pixel column, and in this second phase optionally by this first and this second storage capacitors unit wherein another be coupled to this drive end, to utilize those electric charges to carrying out pre-charged to this pixel column.
2. data driver according to claim 1, wherein when this fasten at present lock view data correspond to this positive polarity datum and this renewal and this fasten at present lock view data correspond to different level time, this comparing unit controls this multiplexing unit and this first storage capacitors unit is coupled to this drive end in this first period, to be recycled in this first storage capacitors unit by the positive polarity electric charge in this pixel column.
3. data driver according to claim 2, wherein when this renewal fasten lock view data correspond to this positive polarity datum and this renewal and this fasten at present lock view data correspond to different level time, this comparing unit controls this multiplexing unit and this first storage capacitors unit is coupled to this drive end in this second phase, carries out pre-charged to utilize those positive polarity electric charges in this first storage capacitors unit to this pixel column.
4. data driver according to claim 3, wherein this first storage capacitors unit comprises multiple electric capacity subelement, and this multiplexing unit has multiple input end accordingly, to be coupled to the plurality of electric capacity subelement respectively;
Wherein, during this first period is divided into multiple first son by this comparing unit accordingly, and respectively at those electric capacity subelements of conducting middle during those first sons, so that this positive polarity electric charge is recycled to those electric capacity subelements;
Wherein, during this second phase is divided into multiple second son by this comparing unit accordingly, and respectively at those electric capacity subelements of conducting middle during those second sons, carry out pre-charged to utilize this positive polarity electric charge in those electric capacity subelements to this pixel column.
5. data driver according to claim 1, wherein when this fasten at present lock view data correspond to this negative polarity datum and this renewal and this fasten at present lock view data correspond to different level time, this comparing unit controls this multiplexing unit and this second storage capacitors unit is coupled to this drive end in this first period, to be recycled in this second storage capacitors unit by the negative polarity electric charge in this pixel column.
6. data driver according to claim 5, wherein when this renewal fasten lock view data correspond to this negative polarity datum and this renewal and this fasten at present lock view data correspond to different level time, this comparing unit controls this multiplexing unit and this second storage capacitors unit is coupled to this drive end in this second phase, discharges in advance to this pixel column to utilize this negative polarity electric charge in this second storage capacitors unit.
7. data driver according to claim 6, wherein this second storage capacitors unit comprises multiple electric capacity subelement, and this multiplexing unit has multiple input end accordingly, to be coupled to those electric capacity subelements respectively;
Wherein, during this first period is divided into multiple first son by this comparing unit accordingly, and respectively at those electric capacity subelements of conducting middle during those first sons, so that this negative polarity electric charge is recycled to those electric capacity subelements;
Wherein, during this second phase is divided into multiple second son by this comparing unit accordingly, and respectively at those electric capacity subelements of conducting middle during those second sons, to utilize this negative polarity electric charge in those electric capacity subelements, this pixel column is discharged in advance.
8. data driver according to claim 1, wherein this multiplexing unit is also coupled to an earthing power supply path, and this earthing power supply path provides a ground connection datum.
9. data driver according to claim 8, wherein when this fasten at present lock view data correspond to this ground connection electricity datum time, this comparing unit controls this multiplexing unit and this earthing power supply path is coupled to this drive end in this first period;
Wherein, when this renewal fasten lock view data correspond to this ground connection electricity datum time, this comparing unit controls this multiplexing unit and this earthing power supply path is coupled to this drive end in this second phase.
10. data driver according to claim 8, wherein this comparing unit is also middle during this driving divides between a fourth phase, and between this fourth phase in control this multiplexing unit optionally this earthing power supply path is coupled to this drive end, between this fourth phase be wherein trigger in this first and this second phase between.
11. data drivers according to claim 10, when this renewal and this fasten at present lock view data entirely do not correspond to this positive polarity datum time, this comparing unit between this fourth phase in control this multiplexing unit this earthing power supply path is coupled to this drive end;
When this renewal and this fasten at present lock view data entirely do not correspond to this negative polarity datum time, this comparing unit between this fourth phase in control this multiplexing unit this earthing power supply path is coupled to this drive end.
12. data drivers according to claim 1, wherein when this renewal and this fasten at present lock view data correspond to this positive polarity datum time, this comparing unit in this first and this second phase in control this multiplexing unit this output node be coupled to this drive end;
Wherein, when this renewal and this fasten at present lock view data correspond to this negative polarity datum time, this comparing unit in this first and this second phase in control this multiplexing unit this output node be coupled to this drive end.
13. data drivers according to claim 1, wherein this comparing unit also between this third phase in control this multiplexing unit this output node is coupled to this drive end, to drive for this pixel column.
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| CN201210228538.9A CN103531154B (en) | 2012-07-02 | 2012-07-02 | Electrophoretic display device (EPD) data driver |
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| CN201210228538.9A CN103531154B (en) | 2012-07-02 | 2012-07-02 | Electrophoretic display device (EPD) data driver |
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| JP5348363B2 (en) * | 2006-04-25 | 2013-11-20 | セイコーエプソン株式会社 | Electrophoretic display device, electrophoretic display device driving method, and electronic apparatus |
| KR20090003643A (en) * | 2007-07-03 | 2009-01-12 | 삼성전자주식회사 | Driving apparatus for display device and electrophoretic display device including the same |
| CN102456321A (en) * | 2010-10-19 | 2012-05-16 | 天钰科技股份有限公司 | Electrophoretic display and image updating method thereof |
| TWI431606B (en) * | 2010-12-31 | 2014-03-21 | Au Optronics Corp | 3d display and driving method thereof |
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