CN102385837A - Driving method and driving device of electronic paper - Google Patents
Driving method and driving device of electronic paper Download PDFInfo
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- CN102385837A CN102385837A CN2010102674053A CN201010267405A CN102385837A CN 102385837 A CN102385837 A CN 102385837A CN 2010102674053 A CN2010102674053 A CN 2010102674053A CN 201010267405 A CN201010267405 A CN 201010267405A CN 102385837 A CN102385837 A CN 102385837A
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Abstract
The invention discloses a driving method of electronic paper, which comprises the following steps of: acquiring previous frame image data from a first storage unit; acquiring next frame image data and comparing the next frame image data with the previous frame image data to obtain driving waveform data; storing the next frame image data into the first storage unit and storing the driving waveform data into a second storage unit; and applying a driving voltage on a data wire according to the driving waveform data stored by the second storage unit so as to realize the display from a previous frame image to a next frame image. Based on the driving method of the electronic paper, the invention also provides a driving device of the electronic paper. According to the driving method and the driving device disclosed by the invention, the processing efficiency of the driving data can be improved and the storage space of a flash is reduced, and thereby the aim of reducing the cost is achieved.
Description
Technical field
The present invention relates to Electronic Paper and show field, particularly a kind of driving method of electronic paper and drive unit.
Background technology
The Electronic Paper display technique is a kind of novel reflective display mode, and compared to traditional display mode, it has the reflectivity height, and is low in energy consumption, and contrast is high, advantage such as can keep for a long time, is a kind ofly novel can substitute the electronic equipment that paper is used to read.
The present more electronic paper display device that is based on electrophoretic techniques of research is particularly based on the electronic paper display device of microcapsules electrophoretic techniques.Electronic paper display device is generally formed applying by substrate up and down, is filled with the electrophoresis particle film therebetween, on last substrate, public electrode is arranged, and on the substrate pixel electrode is being arranged down, and pixel electrode generally is rectangular laying, pixel of each pixel electrode correspondence.Show for active electronic paper; What following substrate was commonly used is thin film transistor (TFT) (TFT, Thin Film Transistor) active base plate, and pixel electrode links to each other through via hole with drain electrode among the TFT; Source electrode among the TFT links to each other with data line, and the gate electrode among the TFT is connected on the grid bus.Based on said structure; Gating with total each pixel of line traffic control of grid; When gate electrode fed gate voltage, with drain electrode and source electrode conduction, then pixel electrode was applied with voltage by data line through active layer; Cooperate the common electric voltage on the public electrode again, thereby the length driving electrophoresis particle that applies the electric field time between the public electrode through pixel electrode and last substrate moves to the demonstration of diverse location realization black and white GTG.
Electronic Paper drives and generally is divided into reseting stage and demonstration stage; At reseting stage, classic method is carried out one-way resetting, promptly only resets toward black or Bai's direction; The time that resets like this is just longer; So proposed the method for two-way reset again, promptly resetted apart from which nearly past which direction of black and white once the demonstration GTG, thereby can save half the reset time in theory according to last; In the demonstration stage,, carry out image and show according to the state after resetting.In the traditional driving method; Two synchronous DRAM (SDRAM are at first arranged; The view data of Synchronous Dynamic Random Access Memory) storing previous frame and next frame respectively; When driving, at first from the look-up table (LUT, Look Up Table) of flash memory (flash), read corresponding waveform (waveform) and drive according to the data of same position among the SDRAM.The form of the waveform of its storage is a string-1,1 and 0 sequence formed, wherein-1,1,0 represent respectively on the corresponding data line driving voltage for-15V ,+15V and 0V.Reset and the demonstration of 64 subframes (" subframe " here refers to gate electrode scans last column end of scan since first row a process) if driving is divided into 64 subframes, that corresponding waveform is 128 sequence.The sequence data position that the tradition waveform is corresponding is a lot, more complicated aspect data processing and storage.
For example; Before each sub-frame drive; All want from waveform, to search earlier this subframe corresponding be-1,1 or 0, thereby determine the level of this subframe, very loaded down with trivial details of whole process; And, the spatial content of flash memory also there is certain requirement because all waveforms all need the flash memory of a larger capacity to store.Fig. 1 shows the storage synoptic diagram of view data in the prior art; As shown in Figure 1; SDRAM1 and SDRAM2 are respectively applied for the view data of storing previous frame and next frame, and (view data of previous frame and next frame also can be stored among the same SDRAM; SDRAM1 and SDRAM2 then represent as two storage areas respectively), wherein the view data of each pixel is stored respectively, for example data1, data2...... are until dataN.At first; After powering on, need to show initialization to Electronic Paper, follow-up like this image shows just has reference value preferably, for example will show initialization after the SDRAM1 data be changed to 0 entirely; First frame image data is stored in SDRAM2; When showing first two field picture SDRAM2 and SDRAM1 are compared, show output behind the inquiry look-up table, (first two field picture shows that the output back needs images displayed with respect to second frame with first frame image data simultaneously; Be the previous frame image, this moment, first frame image data was also referred to as the previous frame view data) be stored in SDRAM1; Second frame image data (next frame view data) is stored in SDRAM2, when showing second two field picture SDRAM2 and SDRAM1 is compared, tabling look-up shows output, and SDRAM1 promptly stores present image; Next frame wants the images displayed data storage in SDRAM2, and the like, it is the exportable picture displayed of wanting that circulation is carried out.Certainly, SDRAM1 and SDRAM2 are not the view data that can only be confined to store respectively previous frame and next frame, in other embodiments; Can also carry out through the mode of alternately storage; For example, after the initialization, first frame image data is stored in SDRAM2; When showing first two field picture SDRAM2 and SDRAM1 are compared, show output behind the inquiry look-up table; Second frame image data is stored in SDRAM1, when showing second two field picture SDRAM1 and SDRAM2 is compared, show output behind the inquiry look-up table; The 3rd frame image data is stored in SDRAM2, when showing the 3rd two field picture SDRAM2 and SDRAM1 is compared, show output behind the inquiry look-up table, and the like, the also exportable picture displayed of wanting is carried out in circulation.
Fig. 2 is the storage organization synoptic diagram of look-up table in the prior art.Consult Fig. 2, horizontal direction " 0 " to " 7 " identifies the GTG of previous frame image respectively, and vertical direction " 0 " identifies the GTG of next frame image respectively to " 7 "; Thus; Constituted the look-up table of 8 row, 8 row of one 8 GTG, wherein 0 GTG is represented white, and 7 GTGs are represented black.For example, when the luma data of certain pixel previous frame image is 3, the luma data of next frame image is 2, through the inquiry look-up table, then can find the data at 3&2 place, so just shows according to the data-driven at 3&2 place and exports.Suppose that display image is that 8 GTGs and whole driving are divided into that 64 subframes reset and 64 subframes show totally 128 subframes, then the capacity of corresponding look-up table required flash memory is at least 128*2* (8*8)=16384bits (representing respectively that with-1,1,0 driving voltage on the corresponding data line need be represented by two scale-of-two)." if 01 " expression 0V; " 10 " expression+15V; " 11 " expression-15V (different driving voltages is represented different driving directions); And suppose in 128 subframes of whole driving that certain pixel resets from 3 GTGs needs 32 subframes, demonstration to 2 GTGs need 22 subframes; All the other are in the maintenance stage; The representation of this driving data then is so: 1111......1111 (totally 32 groups " 11 ") 0101......0101 (totally 32 groups " 01 ") 1010......1010 (totally 22 groups " 10 ") 0101......0101 (totally 42 groups " 01 "), and the storage space that this drive waveforms needs is 32*2+32*2+22*2+42*2=256bits (corresponding to the lattice in the look-up table shown in Figure 2).If adopted the method for two-way reset; Suppose that the luma data when certain pixel previous frame image is 4; The luma data of next frame image is 5, and then can reset to GTG 7 directions (reset during with one-way resetting to GTG 0 difference to some extent) carries out by the demonstration of GTG 7 to GTG 5 again.Same through the inquiry look-up table, then can find the data at 5&4 place, so just the data-driven according to the 5&4 place shows output.Still suppose that whole driving is divided into that 64 subframes reset and 64 subframes show in 128 subframes totally; Certain pixel resets from 4 GTGs needs 32 subframes; Demonstration to 5 GTG needs 22 subframes; All the other are in the maintenance stage; The representation of this driving data then is so: 1010......1010 (totally 32 groups " 10 ") 0101......0101 (totally 32 groups " 01 ") 1111......1111 (totally 22 groups " 11 ") 0101......0101 (totally 42 groups " 01 "), same, the storage space that this drive waveforms needs also is 256bits (corresponding to another lattice in the look-up table shown in Figure 2).
Summary of the invention
The problem that the present invention will solve is too complicated because of drive form in the prior art, causes the efficient of data processing and storage relatively poor.
For addressing the above problem, the invention provides a kind of driving method of electronic paper, comprising:
Obtain the previous frame view data from first storage unit;
Obtain the next frame view data, more said next frame view data and said previous frame view data obtain the drive waveforms data;
Deposit said next frame view data in said first storage unit, deposit said drive waveforms data in second storage unit;
Said drive waveforms data according to said second cell stores impose driving voltage at data line, to realize the demonstration from the previous frame image to the next frame image.
Optional, said demonstration from the previous frame image to the next frame image comprises the previous frame image resetted, and saidly is reset to two-way reset to what the previous frame image carried out.
Optional, said drive waveforms data comprise: the number of times of driving direction that the previous frame image is resetted and required pulse voltage, the number of times of driving direction that the next frame image is shown and required pulse voltage.
Optional, the said driving direction that the previous frame image is resetted represented by 2 bits, said the reset number of times of required pulse voltage of previous frame image represented by the n bit; The said driving direction that the next frame image is shown is represented that by 2 bits the said number of times of required pulse voltage that the next frame image is shown is represented by the n bit; Wherein, n is a natural number.
Optional, said previous frame view data, next frame view data comprise the luma data of each pixel in the two field picture.
Optional, said next frame view data and said previous frame view data obtain the drive waveforms data and comprise more said next frame view data and said previous frame view data, from look-up table, are inquired about obtaining the drive waveforms data by comparative result.
Optional, saidly deposit said next frame view data in said first storage unit and comprise that replacing said previous frame view data with said next frame view data deposits said first storage unit in.
For addressing the above problem, the present invention also provides a kind of drive unit of Electronic Paper, comprising: first storage unit, be used to store the previous frame view data, and also comprise control module, driver element and second storage unit,
Said control module is used for obtaining the previous frame view data from said first storage unit; Obtain the next frame image; More said next frame view data and said previous frame view data obtain the drive waveforms data, deposit said next frame view data in said first storage unit; Deposit said drive waveforms data in second storage unit, and realize display driver according to the said driver element of the said drive waveforms Data Control of said second cell stores;
Said driver element is used to accept the control of said control module, imposes driving voltage to realize the demonstration from the previous frame image to the next frame image at data line;
Said second storage unit is used to store said drive waveforms data.
Optional, said demonstration from the previous frame image to the next frame image comprises the previous frame image resetted, and saidly is reset to two-way reset to what the previous frame image carried out.
Optional, said drive waveforms data comprise: the number of times of driving direction that the previous frame image is resetted and required pulse voltage, the number of times of driving direction that the next frame image is shown and required pulse voltage.
Optional, the said driving direction that the previous frame image is resetted represented by 2 bits, said the reset number of times of required pulse voltage of previous frame image represented by the n bit; The said driving direction that the next frame image is shown is represented that by 2 bits the said number of times of required pulse voltage that the next frame image is shown is represented by the n bit; Wherein, n is a natural number.
Optional, said previous frame view data, next frame view data comprise the luma data of each pixel in the two field picture.
Optional; Also comprise the 3rd storage unit; Said the 3rd storage unit comprises the look-up table that stores said drive waveforms data; More said next frame view data of said control module and said previous frame view data obtain the drive waveforms data and comprise more said next frame view data and said previous frame view data, from said look-up table, are inquired about obtaining the drive waveforms data by comparative result.
Optional, said control module deposits said next frame view data in said first storage unit and comprises that replacing said previous frame view data with said next frame view data deposits said first storage unit in.
Compared with prior art, the present invention has the following advantages:
The next frame view data is directly compared with the previous frame view data that is stored in first storage unit; Obtain the drive waveforms data and it is stored in the said control module controlling and driving of confession in the internal memory through the inquiry look-up table; Make to speed up, have higher efficient what driving data was handled;
Data storage form through changing drive waveforms has reduced the required storage space of flash memory, and the purpose that realization reduces cost also makes the driving data processing procedure is simplified greatly, improves to drive the efficient that shows.
Description of drawings
Fig. 1 is the storage synoptic diagram of view data in the prior art;
Fig. 2 is the storage organization synoptic diagram of look-up table in the prior art;
Fig. 3 is a driving method of electronic paper schematic flow sheet provided by the invention;
Fig. 4 is the synoptic diagram of driving method of electronic paper embodiment provided by the invention;
Fig. 5 is the drive waveforms synoptic diagram among the driving method of electronic paper embodiment provided by the invention;
Fig. 6 is the driving device structure synoptic diagram of Electronic Paper provided by the invention.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, does detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
Set forth detail in the following description so that make much of the present invention.But the present invention can be different from alternate manner described here and implements with multiple, and those skilled in the art can do similar popularization under the situation of intension of the present invention.Therefore the present invention does not receive the restriction of following disclosed embodiment.
Traditional driving method described in background technology is too complicated; Cause data-handling efficiency low and memory space requirements is bigger; So the present invention proposes the driving method of optimization, as shown in Figure 3, Fig. 3 is a driving method of electronic paper schematic flow sheet provided by the invention.Driving method of electronic paper provided by the invention comprises:
Step S101 obtains the previous frame view data from first storage unit;
Step S102 obtains the next frame view data, and more said next frame view data and said previous frame view data obtain the drive waveforms data;
Step S103 deposits said next frame view data in said first storage unit, deposits said drive waveforms data in second storage unit;
Step S104 imposes driving voltage according to the said drive waveforms data of said second cell stores at data line, to realize the demonstration from the previous frame image to the next frame image.
Wherein, the demonstration from the previous frame image to the next frame image described in the step S104 comprises the previous frame image resetted and after resetting, the next frame image shown, is reset to two-way reset to what the previous frame image carried out in the present embodiment.In the specific embodiment, said previous frame view data, next frame view data comprise the luma data of each pixel in the two field picture, and the image of being made up of different GTG pixels carries out is reset to two-way reset; And the previous frame image data storage is in said first storage unit; Said first storage unit can be labeled as SDRAM1 for a SDRAM, and SDRAM1 is for storage mode and the prior art and the indistinction of view data; And be with prior art is distinguished to some extent; The next frame view data is when needs compare with the previous frame view data, directly to obtain, and obtains from SDRAM2 during with the comparison of previous frame view data but not read in advance and be stored among the SDRAM2 until needs again, can reduce the reading in advance of next frame view data like this, stores, process of reading again; Make the entire process process more efficient; Certainly, the next frame view data can be directed to the data source of institute's display image, and the data source of this image can be stored among the flash memory (flash).Fig. 4 is the synoptic diagram of driving method of electronic paper embodiment provided by the invention.In conjunction with the process flow diagram of driving method of electronic paper shown in Figure 3, consult Fig. 4, be example with one of them pixel; At first from SDRAM1, obtain the luma data i of previous frame image; Suppose i=2 at this moment, represent that this pixel previous frame image is 2 GTGs, obtain the luma data j of next frame image then; The luma data j of said next frame image and the luma data i of said previous frame image are compared and obtain comparative result; Suppose j=3 at this moment, represent that the next frame image that this pixel need show is 3 GTGs, can the said comparative result after comparing be expressed as 2&3; Go to obtain the drive waveforms data by said comparative result then, specifically be meant by said comparative result 2&3 and from look-up table, inquire about acquisition drive waveforms data.
The representation of drive waveforms data described here is different from the representation of driving data of the prior art.The representation of the driving data of the prior art described in background technology is made up of many groups 2 bits; Every group is expressed as different driving voltage (different driving voltages shows different driving directions again); For example 0V is represented in " 01 "; " 10 " expression+15V, " 11 " expression-15V.Suppose that display image is that 8 GTGs and whole driving are divided into that 64 subframes reset and 64 subframes show in 128 subframes totally; Certain pixel resets from 3 GTGs needs 32 subframes; Demonstration to 2 GTG needs 22 subframes; All the other are in the maintenance stage; The representation of this driving data then is so: 1111......1111 (totally 32 groups " 11 ") 0101......0101 (totally 32 groups " 01 ") 1010......1010 (totally 22 groups " 10 ") 0101......0101 (totally 42 groups " 01 "), and such representation more complicated, and take the storage space of bigger flash memory; The required memory capacity of single pixel is 256bits, and so the capacity of corresponding look-up table required flash memory is at least 256* (8*8)=16384bits.And drive waveforms data according to the invention comprise: the number of times of driving direction that the previous frame image is resetted and required pulse voltage, the number of times of driving direction that the next frame image is shown and required pulse voltage.Wherein, The said driving direction that the previous frame image is resetted is represented by 2 bits; Said the reset number of times of required pulse voltage of previous frame image is represented by the n bit that n bit can represent the to reset scope of number of times of required pulse voltage then is 1 to 2
nEqually; The said driving direction that the next frame image is shown is represented that by 2 bits the said number of times of required pulse voltage that the next frame image is shown is represented by the n bit, and the n bit can represent that the scope of the number of times of demonstration required pulse voltage is 1 to 2
nWherein, n is a natural number.
Therefore, in the present embodiment, display image is that 8 GTGs and whole driving are divided into that 64 subframes reset and 64 subframes show in 128 subframes totally; The luma data of the previous frame image of certain pixel is 3; The luma data of next frame image is 2, needs 32 subframes if reset to 0 GTG from 3 GTGs, and being shown to 2 GTGs by 0 GTG needs 22 subframes; All the other are in the maintenance stage, and the representation according to drive waveforms data of the present invention is so: 1110000010010110.Wherein preceding 2 " 11 " expression: under the two-way reset situation, 3 GTGs should reset to 0 GTG, should impose so-the 15V pulse voltage; The 3rd to 8 " 100000 " expression: corresponding decimal numeral 32, expression is 32 times by 3 GTGs to the reset number of times of required pulse voltage of 0 GTG; The 9th to 10 " 10 " expression: 0 GTG shows to 2 GTGs and impose+the 15V pulse voltage; The 11st to 16 " 010110 " expression: corresponding decimal numeral 22, expression by 0 GTG show to the number of times of 2 GTG required pulse voltages be 22 times.In like manner; If working as the luma data of certain pixel previous frame image is 4, the luma data of next frame image is 5, under the situation that adopts two-way reset; Then can be earlier reset (reset during to GTG 0 difference to some extent), carry out again by the demonstration of GTG 7 to GTG 5 with one-way resetting to GTG 7 directions.Still suppose that whole driving is divided into that 64 subframes reset and 64 subframes show in 128 subframes totally; Certain pixel resets to 7 GTGs from 4 GTGs needs 32 subframes; Need 22 subframes by 7 GTGs demonstration to 5 GTGs; All the other are in the maintenance stage, and the representation according to drive waveforms data of the present invention then is so: 1010000011010110.Wherein preceding 2 " 10 " expression: under the two-way reset situation, 4 GTGs should reset to 7 GTGs, should impose so+the 15V pulse voltage; The 3rd to 8 " 100000 " expression: corresponding decimal numeral 32, expression is 32 times by 4 GTGs to the reset number of times of required pulse voltage of 7 GTGs; The 9th to 10 " 11 " expression: 7 GTGs show to 5 GTGs and impose-the 15V pulse voltage; The 11st to 16 " 010110 " expression: corresponding decimal numeral 22, expression by 7 GTGs show to the number of times of 5 GTG required pulse voltages be 22 times.In the foregoing description; Adopt the file layout of drive waveforms data according to the invention; Shared storage space is 16bits, and so the capacity of corresponding look-up table required flash memory is 16* (8*8)=1024bits, with respect to the capacity 16384bits of look-up table required flash memory in the prior art; Save storage space greatly, reduced cost thus.
Continue to consult Fig. 4; After from said look-up table, inquiring said drive waveforms data; Depositing said next frame view data in said first storage unit, particularly, is to replace said previous frame view data with said next frame view data to deposit SDRAM1 in; For example the previous frame view data was i=3 originally; Next frame view data j=2, relatively and after from look-up table, inquiring the corresponding drive waveforms data of 3&2, i=3 deposits SDRAM1 in next frame view data j=2 replacement previous frame view data.Simultaneously, deposit the said drive waveforms data that inquire in second storage unit, quick calling is to accomplish whole driving process in the time of for display driver.Said second storage unit also can be a SDRAM, for being different from the SDRAM2 of storage next frame view data in the prior art, so said second storage unit is labeled as SDRAM0.In the present embodiment, be that the drive waveforms data that the 3&2 that from look-up table, obtains is corresponding deposit SDRAM0 in.
After getting access to said drive waveforms data, just can impose driving voltage to realize demonstration at data line from the previous frame image to the next frame image.At reseting stage; Impose-15V still+pulse voltage number of times that the pulse voltage of 15V resets and reset required confirmed by said drive waveforms data, for example, when said drive waveforms data are " 1110000010010110 "; Then be illustrated in the pulse voltage that reseting stage imposes 32-15V; Because the front has been assumed to be whole driving and has been divided into that 64 subframes reset and 64 subframes show totally 128 subframes, so at 64 subframe reseting stages, the pulse voltage that also need impose 32 0V is as keeping; In the demonstration stage; Through impose+15V still-pulse voltage of 15V shows and shows that required pulse voltage number of times confirmed by said drive waveforms data equally; For example, still be the drive waveforms data of " 1110000010010110 ", then impose the pulse voltage of 22+15V in the demonstration stage; The pulse voltage that imposes 42 0V then is as keeping, and the driving of so just having accomplished from the previous frame image to the next frame image shows.In the practical implementation process; Can when confirming required pulse voltage number of times, this pulse voltage number of times be deposited in the said counter through a counter being set to reseting stage or required pulse voltage number of times is controlled in the demonstration stage; Every through pulsatile once; Numerical value in the said counter just subtracts one, and when the numerical value vanishing, driving just stops.The oscillogram of above-mentioned whole driving process is as shown in Figure 5, and Fig. 5 is the drive waveforms synoptic diagram among the driving method of electronic paper embodiment provided by the invention.
Wherein, the reason that image is resetted is, in practical application; Because craft precision; Film forming difference, the combined action of a variety of causes such as signal interference some pixel might occur through pulse-length modulation (PWM; Pulse Width Modulation) fail fully accurately to change to the situation of corresponding GTG after driving, the result is that actual displayed GTG and target gray scale exist fine difference.Because the bistable characteristic of electronic ink material; Only if this pixel can be carried out enough excessive pulses (only possibly appear at demonstration the highest with minimum gray scale time) that applies just; Otherwise this difference can be kept always, and then the later GTG that has influence on that continues shows.What is more important causes if this demonstration difference is inherent defect by device or system, just also can produce same situation after so.A large amount of grayscale difference will constantly be accumulated, up to making the many small grayscale difference occur on all or the most of pixel run up to the degree that makes whole display image screen difference occur.In order to eliminate this phenomenon, introduced the image resetting technique.The image resetting technique can be full frame black resetting, i.e. full frame insertion one width of cloth picture black and apply enough excessive pulses before showing the next frame image, with guarantee all pixels all accurate in locating be high gray.(below various repositioning methods analogize) full framely resets in vain, perhaps resets respectively according to the black and white of time frame GTG or black and white inverted reset respectively.
Keeping in Electronic Paper drives is because the umber of pulse that all pixel demonstrations are needed is different; So presumable pixel has driven completion, and the pixel that has also need continue to impose pulse voltage, for example certain pixel shows from 2 GTG to 1 GTGs; If reseting stage needs 22 pulse voltages from 2 GTG to 0 GTGs; Be to have accomplished to this pixel reseting stage this moment, if but other certain pixel need reset 32 reset voltage pulses of needs from 3 GTGs to 0 GTG; Also keep in the reseting procedure this moment; When all pixels of entire image are considered together, the pixel that drives completion is earlier kept with regard to getting into, waited all to drive completion and carry out next step action again.
Adopt driving method of electronic paper according to the invention that resetting of carrying out of the said image of being made up of different GTG pixels is preferably two-way reset, obtain said drive waveforms data through the inquiry look-up table.But; In other embodiments; Driving method of electronic paper according to the invention also can be used for the situation of one-way resetting; Embodiment and embodiments of the invention are similar, only need on the data of expression driving direction, change, but have little significance because of the situation of driving direction for one-way resetting; So also can remove 2 bits of expression reset drives direction and 2 bits of display driver direction, the give instructions in reply n bit of the pulse voltage number of times that n bit and the expression of pulse voltage number of times of position show of a reservation table.
Based on driving method of electronic paper according to the invention, a kind of drive unit of Electronic Paper is provided also.Fig. 6 shows the driving device structure synoptic diagram of Electronic Paper provided by the invention; As shown in Figure 6, the drive unit of said Electronic Paper comprises first storage unit 601, is used to store the previous frame view data; Also comprise control module 602, driver element 605 and second storage unit 603; Said control module 602 is used for obtaining the previous frame view data from said first storage unit 601, obtains the next frame image, more said next frame view data and said previous frame view data; Obtain the drive waveforms data; Deposit said next frame view data in said first storage unit 601, deposit said drive waveforms data in second storage unit 603, and realize display driver according to the said driver element 605 of the said drive waveforms Data Control of said second storage unit 603 storages; Said driver element 605 is used to accept the control of said control module 602, imposes driving voltage to realize the demonstration from the previous frame image to the next frame image at data line; Said second storage unit 603 is used to store said drive waveforms data.The drive unit of said Electronic Paper also comprises the 3rd storage unit 604; In the specific embodiment; Said the 3rd storage unit 604 can be a flash memory; Comprise the look-up table that stores said drive waveforms data; Said control module 602 more said next frame view data and said previous frame view data; The process of said comparison can be through a comparer is set, and under the control of said control module 602 (said comparer also can be arranged in the said control module 602), accomplished by said comparer the luma data of the luma data of previous frame image and next frame image is exported comparative result after relatively; Said control module 602 is inquired about from the look-up table of said the 3rd storage unit 604 according to comparative result and is obtained the drive waveforms data, and said next frame view data is replaced said previous frame view data deposits said first storage unit 601 in.The practical implementation process of the drive unit of said Electronic Paper can repeat no more at this with reference to driving method of electronic paper provided by the invention.
In addition; It will be appreciated by those skilled in the art that and realize that all or part of of the foregoing description is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer-readable recording medium, and said storage medium can be ROM, RAM, magnetic disc, CD etc.
To sum up, driving method of electronic paper provided by the invention and drive unit have following beneficial effect at least:
The next frame view data is directly compared with the previous frame view data that is stored in first storage unit; Obtain the drive waveforms data and it is stored in the said control module controlling and driving of confession in the internal memory through the inquiry look-up table; Make to speed up, improved data processing efficiency what driving data was handled;
Data storage form through changing drive waveforms has reduced the required storage space of flash memory, and the purpose that realization reduces cost also makes the driving data processing procedure is simplified greatly, improves to drive the efficient that shows.
Though the present invention with preferred embodiment openly as above; But it is not to be used for limiting the present invention; Any those skilled in the art are not breaking away from the spirit and scope of the present invention; Can utilize the method and the technology contents of above-mentioned announcement that technical scheme of the present invention is made possible change and modification, therefore, every content that does not break away from technical scheme of the present invention; To any simple modification, equivalent variations and modification that above embodiment did, all belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (14)
1. a driving method of electronic paper is characterized in that, comprising:
Obtain the previous frame view data from first storage unit;
Obtain the next frame view data, more said next frame view data and said previous frame view data obtain the drive waveforms data;
Deposit said next frame view data in said first storage unit, deposit said drive waveforms data in second storage unit;
Said drive waveforms data according to said second cell stores impose driving voltage at data line, to realize the demonstration from the previous frame image to the next frame image.
2. driving method of electronic paper according to claim 1 is characterized in that, said demonstration from the previous frame image to the next frame image comprises the previous frame image is resetted, and saidly is reset to two-way reset to what the previous frame image carried out.
3. driving method of electronic paper according to claim 2; It is characterized in that; Said drive waveforms data comprise: the number of times of driving direction that the previous frame image is resetted and required pulse voltage, the number of times of driving direction that the next frame image is shown and required pulse voltage.
4. driving method of electronic paper according to claim 3; It is characterized in that; The said driving direction that the previous frame image is resetted represented by 2 bits, said the reset number of times of required pulse voltage of previous frame image represented by the n bit; The said driving direction that the next frame image is shown is represented that by 2 bits the said number of times of required pulse voltage that the next frame image is shown is represented by the n bit; Wherein, n is a natural number.
5. driving method of electronic paper according to claim 1 is characterized in that, said previous frame view data, next frame view data comprise the luma data of each pixel in the two field picture.
6. driving method of electronic paper according to claim 1; It is characterized in that; Said next frame view data and said previous frame view data; Obtain the drive waveforms data and comprise more said next frame view data and said previous frame view data, from look-up table, inquire about obtaining the drive waveforms data by comparative result.
7. driving method of electronic paper according to claim 1; It is characterized in that, saidly deposit said next frame view data in said first storage unit and comprise that replacing said previous frame view data with said next frame view data deposits said first storage unit in.
8. the drive unit of an Electronic Paper comprises first storage unit, is used to store the previous frame view data, it is characterized in that, also comprises control module, driver element and second storage unit,
Said control module is used for obtaining the previous frame view data from said first storage unit; Obtain the next frame image; More said next frame view data and said previous frame view data obtain the drive waveforms data, deposit said next frame view data in said first storage unit; Deposit said drive waveforms data in second storage unit, and realize display driver according to the said driver element of the said drive waveforms Data Control of said second cell stores;
Said driver element is used to accept the control of said control module, imposes driving voltage to realize the demonstration from the previous frame image to the next frame image at data line;
Said second storage unit is used to store said drive waveforms data.
9. the drive unit of Electronic Paper according to claim 8 is characterized in that, said demonstration from the previous frame image to the next frame image comprises the previous frame image is resetted, and saidly is reset to two-way reset to what the previous frame image carried out.
10. the drive unit of Electronic Paper according to claim 9; It is characterized in that; Said drive waveforms data comprise: the number of times of driving direction that the previous frame image is resetted and required pulse voltage, the number of times of driving direction that the next frame image is shown and required pulse voltage.
11. the drive unit of Electronic Paper according to claim 10; It is characterized in that; The said driving direction that the previous frame image is resetted represented by 2 bits, said the reset number of times of required pulse voltage of previous frame image represented by the n bit; The said driving direction that the next frame image is shown is represented that by 2 bits the said number of times of required pulse voltage that the next frame image is shown is represented by the n bit; Wherein, n is a natural number.
12. the drive unit of Electronic Paper according to claim 8 is characterized in that, said previous frame view data, next frame view data comprise the luma data of each pixel in the two field picture.
13. the drive unit of Electronic Paper according to claim 8; It is characterized in that; Also comprise the 3rd storage unit, said the 3rd storage unit comprises the look-up table that stores said drive waveforms data, more said next frame view data of said control module and said previous frame view data; Obtain the drive waveforms data and comprise more said next frame view data and said previous frame view data, from said look-up table, inquire about obtaining the drive waveforms data by comparative result.
14. the drive unit of Electronic Paper according to claim 8; It is characterized in that said control module deposits said next frame view data in said first storage unit and comprises that replacing said previous frame view data with said next frame view data deposits said first storage unit in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102674053A CN102385837A (en) | 2010-08-25 | 2010-08-25 | Driving method and driving device of electronic paper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102674053A CN102385837A (en) | 2010-08-25 | 2010-08-25 | Driving method and driving device of electronic paper |
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| CN102385837A true CN102385837A (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102674053A Pending CN102385837A (en) | 2010-08-25 | 2010-08-25 | Driving method and driving device of electronic paper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI557703B (en) * | 2015-11-20 | 2016-11-11 | 晶門科技有限公司 | Apparatus and method for driving e-paper display |
| WO2018099235A1 (en) * | 2016-11-29 | 2018-06-07 | 京东方科技集团股份有限公司 | Display assembly, display device and display control method |
| CN109308881A (en) * | 2018-10-29 | 2019-02-05 | 惠科股份有限公司 | A kind of driving method of display panel, its driving device and display device |
| CN109493803A (en) * | 2018-10-29 | 2019-03-19 | 惠科股份有限公司 | A kind of driving method of display panel, its driving device and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1617216A (en) * | 2000-10-27 | 2005-05-18 | 三菱电机株式会社 | Driving circuit and driving method for LCD |
| US20080143700A1 (en) * | 2006-12-13 | 2008-06-19 | Lg.Philips Lcd Co., Ltd. | Electrophoretic display and driving method thereof |
| CN101567168A (en) * | 2009-06-04 | 2009-10-28 | 福州华映视讯有限公司 | Drive method of electrophoresis type display device and relevant device |
-
2010
- 2010-08-25 CN CN2010102674053A patent/CN102385837A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1617216A (en) * | 2000-10-27 | 2005-05-18 | 三菱电机株式会社 | Driving circuit and driving method for LCD |
| US20080143700A1 (en) * | 2006-12-13 | 2008-06-19 | Lg.Philips Lcd Co., Ltd. | Electrophoretic display and driving method thereof |
| CN101567168A (en) * | 2009-06-04 | 2009-10-28 | 福州华映视讯有限公司 | Drive method of electrophoresis type display device and relevant device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI557703B (en) * | 2015-11-20 | 2016-11-11 | 晶門科技有限公司 | Apparatus and method for driving e-paper display |
| WO2018099235A1 (en) * | 2016-11-29 | 2018-06-07 | 京东方科技集团股份有限公司 | Display assembly, display device and display control method |
| US11107387B2 (en) | 2016-11-29 | 2021-08-31 | Boe Technology Group Co., Ltd. | Display component, display device and display control method |
| CN109308881A (en) * | 2018-10-29 | 2019-02-05 | 惠科股份有限公司 | A kind of driving method of display panel, its driving device and display device |
| CN109493803A (en) * | 2018-10-29 | 2019-03-19 | 惠科股份有限公司 | A kind of driving method of display panel, its driving device and display device |
| US11100836B2 (en) | 2018-10-29 | 2021-08-24 | HKC Corporation Limited | Driving method for display panel, driving device thereof and display device |
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Application publication date: 20120321 |