CN106489176A

CN106489176A - display drive method

Info

Publication number: CN106489176A
Application number: CN201480069531.4A
Authority: CN
Inventors: 亨利克斯·彼得罗妮拉·玛丽亚·德克斯; 约瑟夫·伊丽莎白·奥贝特; 约翰内斯·威廉默斯·亨德里克斯·门嫩
Original assignee: Amazon Technologies Inc
Current assignee: Amazon Technologies Inc
Priority date: 2013-12-20
Filing date: 2014-12-19
Publication date: 2017-03-08
Anticipated expiration: 2034-12-19
Also published as: CN106489176B; EP3084750A1; JP2017501446A; WO2015092050A1; EP3084750B1; JP6105170B2

Abstract

A kind of method for driving the electrowetting display device with least one display element for being used for showing tonal gradation in respective frame.Methods described determines the tonal gradation change of at least one display element between subsequent frame.According to the tonal gradation change, the display element can DC drive or AC drive.

Description

Display drive method

Background

Electrowetting display device with display controller and display device is known.The display unit of this display device Part includes two kinds of not miscible fluids.Can pass through to display element applied voltage, control fluid so as to form display effect Configuration.When to display controller input data, controllable display element comes display data, such as video image.

Wish to reduce the power consumption of display device.

Brief description

Fig. 1 schematically shows exemplary display devices；

Fig. 2 schematically shows the cross section of exemplary display device；

Fig. 3 schematically shows exemplary display device；

Fig. 4 illustrates the chart of active matrix driving method；

Fig. 5 illustrates the voltage pattern of DC-AC driving method；

The embodiment that Fig. 6 schematically shows methods described；

Fig. 7 illustrates the histogram of the change of the display effect between two frames；

Fig. 8 schematically shows each stage of the staggered driving method of row；

Fig. 9 a and Fig. 9 c illustrate the chart of the staggered driving method of row；

Fig. 9 b illustrates the chart of the staggered driving method of non-row；

Figure 10 a and Figure 10 b illustrate the layout of the sub- display element for color reproduction；

Figure 11 illustrates that analog pulse width modulates the chart of driving method；And

Figure 12 illustrates the chart of many data Write-in driving method.

Describe in detail

Described below general driving method described first, will wherein assume the concept that various embodiments are shared.With The embodiment of lower detailed description is grouped into four classes, the feature of each group of one class embodiment of statement.Although each embodiment is divided Organize as multiple classes, but other classes one or more are can generally comprise for the technology disclosed in a class embodiment and feature Embodiment in.The technology provided in one class embodiment and the improvement of feature can also be in the realities of other classes one or more Apply in scheme and obtain.

General display drive method

Fig. 1 illustrates the cross-sectional view of a part for the example of Electrowetting device.In this example, described device is Electrowetting display device 1, the electrowetting display device 1 include multiple electrowetting units, and the electrowetting unit is for showing unit Part 2, in the display element 2 are illustrated in figure.The lateral extent of display element is referred to by two dotted lines 3,4 in figure Show.Display element includes the first gripper shoe 5 and the second gripper shoe 6.Gripper shoe can be the unitary part of each display element, but Gripper shoe can be enjoyed jointly by multiple display elements.Gripper shoe may include glass or polymer substrate 6,7, and can be rigidity Or flexibility.

Display device has observation side 8 and rear side 9, can observe the figure formed by display device in the observation side 8 Picture shows.In in figure, the first gripper shoe 5 limits rear side 9 and the second gripper shoe 6 limits observation side；Or, the first gripper shoe Observation side can be limited.Display device can be reflection type, transmission-type or semi-transparent reflection type.Display device can be segmentation Display type, wherein image can be built by fragment, and each fragment includes some display elements.Display device can be active matrix The display device of the display device of driving, direct drive display device or passive drive.Multiple display elements can be monochromatic. For colour display device, display element is divided into multiple groups, and each group has different colors；Or, single display element Different colors can be shown.

Space 10 between gripper shoe is full of two kinds of fluids：First fluid 11 and second fluid 12, in two kinds of fluids extremely Few one kind can be liquid.Second fluid can not be miscible with first fluid.Second fluid is conductive or polarity, and permissible It is water or salting liquid, the aqueous solution of such as potassium chloride.Second fluid can be transparent, but can be alternatively coloured, white Color, absorbefacient or reflexive.First fluid is nonconducting, and can be for example alkane (as hexadecane) or permissible It is oily (such as silicone oil).

At least a portion of first fluid absorption spectrum.First fluid can be with a part for transmitted spectrum, so as to form filter Color chips.For this purpose, can be coloured for first fluid by adding granules of pigments or dyestuff.Or, first fluid is permissible Black, that is, absorb or reflectance spectrum essentially all part.Reflectivity first fluid can reflect whole visible spectrum, from And cause layer to assume white；Or can reflectance spectrum a part so that layer has color.

Gripper shoe 5 includes insulating barrier 13.The insulating barrier can be transparent or reflexive.Insulating barrier 13 can show Extend between the wall of element.In order to avoid second fluid 12 short circuit occurs with being arranged between the electrode below insulating barrier, such as scheme Shown, each layer of insulating barrier can extend on multiple display elements 2 incessantly.Insulating barrier has the sky towards display element 2 Between 10 surface 14.In this example, surface 14 is hydrophobic.The thickness of insulating barrier can be less than 2 microns and can be little In 1 micron.

Insulating barrier can be hydrophobic layer；Or, insulating barrier may include hydrophobic layer 15 and the resistance with predetermined dielectric property Barrier 16, as illustrated, 15 space-oriented 10 of hydrophobic layer.Hydrophobic layer is schematically shown in FIG, and can be by AF1600 is formed.Barrier layer 16 can have on the direction of the plane of substrate measurement 100 nanometers with 150 nanometers it Between thickness, and can by inorganic material such as silica or silicon nitride or these materials stacking (for example, silicon oxide-silicon nitride- Silica) or organic material such as polyimides or Parylene make.Barrier layer is may include with many of differing dielectric constant Individual layer.

The hydrophobicity on surface 14 causes first fluid 11 to preferentially attach to insulating barrier 13, because the table with respect to insulating barrier 13 Face, first fluid have higher wettability than second fluid 12.Wettability is related to the parent relatively on fluid with solid surface With joint efforts.Wettability can be measured by the contact angle between fluid and the surface of solids.Contact angle by fluid and solid fluid- Capillary difference at solid boundaries determines.For example, high surface tension difference may indicate that hydrophobic property.

Each element 2 includes the electrode 17 of the part as gripper shoe 5.In the example for illustrating, deposit in each element In a this electrode 17.Electrode 17 is separated by insulating barrier 13 and fluid；The electrode of neighbouring display element is by non-conductive Layer separate.In some instances, other layer can be arranged between insulating barrier 13 and electrode 17.Electrode 17 can be any uncommon The shape or form of prestige.As in figure is schematically indicated, voltage signal is supplied by holding wire 18 to the electrode 17 of display element. Secondary signal line 19 is connected to electrode 25, and the electrode 25 is contacted with conductive second fluid 12.When all elements pass through second When fluid fluidly interconnects and shares second fluid, is not interrupted because of wall, this electrode is that all elements have.Can pass through It is applied to voltage V between holding wire 18 and 19 to control display element 2.Electrode 17 on substrate 7 is connected to display control and sets Standby.It is arranged to having so that, in the display device of the display element of the matrix form of row and column arrangement, electrode can be connected to substrate 7 On control wire matrix.

First fluid 11 in this example is restricted to described by the wall 20 along the cross section of a display element Display element.The cross section of display element can be with any shape；When display element is arranged to matrix form, cross section leads to It is often square or rectangle.Although wall is shown as the structure projected from insulating barrier 13, alternatively the wall can be row Scold the superficial layer of the gripper shoe of first fluid, the relatively low layer of such as hydrophilic layer or hydrophobicity.Wall can be extended to from the first gripper shoe Second gripper shoe, but alternatively, as shown in figure 1, partly the second gripper shoe can be extended to from the first gripper shoe.By dotted line 3 and 4 The scope of the display element of instruction is limited by the center of wall 20.The surface indicated by dotted line 21 and 22 between the wall of display element 14 region is referred to as viewing area 23, produces display effect appreciable from observation side 8 on the viewing area 23.

When no voltage is applied, the forming layer in the range of the viewing area 23 of first fluid 11, and display element is in Closed mode.When to electrode 17,25 applied voltage, first fluid will shrink, and voltage more high convergency is stronger.Display is located now In open mode.Holosystolic first fluid is shown in Fig. 1, has been represented with parameters number 24.

Display effect depending on the adjacent degree on first fluid and second fluid and the surface limited by viewing area, this according to The value of above-mentioned applied voltage V of Lai Yu.Therefore, the value of applied voltage V determines first fluid and second in electrowetting unit The configuration of body.When electrowetting unit is switched to different fluid configuration from a kind of fluid configuration, second fluid and viewing area The adjacent degree of field surface can increase or reduce, at the same the adjacent degree on first fluid and viewing area surface correspondingly reduce or Increase.

Fig. 2 schematically shows the first exemplary Electrowetting display device 201.So-called direct drive type this In example, display device includes display driving system 202 and display device 203.Data to be shown are input into by input line 204 To display driving system.Display driving system processing data and output signal on holding wire 218, to drive display device 203.Display driving system 202 includes display controller 206 and display driver 207.Display controller includes logical for processing Cross at least one processor 208 of the data of the input of input line 204.Processor is connected to and may include computer program instructions extremely A few memory 209, the computer program instructions are configured to using at least one memory and at least one processor Display controller is caused to execute the method according to embodiment described herein.In addition, it is possible to provide can including non-transitory computer Read storage medium computer program, the computer-readable instruction can by computerized device execute by cause described in terms of Calculation machine gasifying device executes the driving method according to embodiment described herein.

Display controller prepares the data for using in a display device.The output end of processor 208 is connected to by line 210 Display driver 207, the display driver 207 include the drive for translating the signals into into the appropriate voltage for display device 203 Dynamic device level.Display driver can also will enter into serial signal therein and change over parallel signal so as to control display device 203 Electrode on voltage.

Fig. 2 illustrates display device 203 in plan view.Display device is included by many of the little square expression of grid Individual electrowetting unit 211.The construction of the electrowetting unit that electrowetting unit 211 can be schematically shown with Fig. 1.Display device 203 lower support plate includes electrode 217, and the electrode 217 can be individually controlled for each unit, as shown in figure 1, or Multiple units can be connected to simultaneously drive multiple units.Fig. 2 is illustrated and is each covered being represented with hacures for multiple units Electrode 217.Electrode 225 is electrically connected to the shared second fluid of display device, and the second fluid passes through total then Holding wire 219 is connected to display driver 207.Can pass through between coordination electrode 225 and the electrode 217 of each electrowetting unit Voltage and in that unit obtain display effect.

Display driver 207 and possibly display controller 206 can be integrated in circuit, and the circuit may be installed Fig. 1 On in shown gripper shoe 5.The electrode 26 in display device 3 in electrowetting unit 211 and Fig. 1 is constituted for showing The numeric display unit of numeral 0 to 19.Numeric display unit shown in Fig. 1 is the simple reality of the display device for directly driving type Example.Many other electrode configurations are feasible, such as to show letter, symbol or image with black and white or colour.Per Individual electrode is directly connected to the driver-level (not shown in figure 1) of the voltage in the coordination electrode in display driver 7.Directly drive Electrode in the electrowetting unit of dynamic display is permanently connected to driver-level during electrowetting unit shows display effect. The electrowetting unit group controlled by an electrode 26 serves as display element；The electrowetting unit of composition is referred to alternatively as sub- display unit Part.Showing display effect, such as providing either statically or dynamically during image, display driver 7 is for good and all and simultaneously Control the voltage on each electrode 26.

Fig. 3 schematically shows the second exemplary Electrowetting display device 31.In so-called driven with active matrix type In this example, display device includes display driving system and display device 32.Display driving system include display controller 33, Show line driver 34 and show row driver 35.Data to be shown are input to display driving system by input line 36.Aobvious Show that controller includes the processor 37 for processing the data being input into by input line 36.Processor is connected at least one storage Device 38.Display controller prepares the data for using in a display device.

The output end of processor 37 by line 39 be connected to display line driver 34, described display line driver 34 include by Signal is transformed into the line driver level 40 of the appropriate voltage for display device 32.Line driver level is connected to by row signal line 41 The row of display device 32, provides row selection signal so as to each row for display device.

Another output end of processor 37 is connected to display row driver 35, the display row driver 35 by line 42 Including translating the signals into into the row driver level 43 of the appropriate voltage for display device 32.Column signal line 44 is by row driver level The row of display device 32 are connected to, and array selecting signal are provided so as to each row for display device.

Display driver may include for enter data in the multiple output ends for being connected to driver-level be assigned to aobvious Show the distributor of driver, not shown in Fig. 3.Distributor can be shift register.Fig. 3 is illustrated and is only used for showing shown in figure The holding wire of these columns and rows of device.Line driver can be integrated in a single integrated circuit.Similarly, row driver can be integrated In a single integrated circuit.Integrated circuit may include complete actuator assembly.Integrated circuit can be incorporated into propping up for display device On fagging 5 or 6.Integrated circuit may include whole display driving system.

Display device 32 includes the multiple display elements for being arranged to matrix.Fig. 3 flag activation for k to k+4 five row and It is labeled as the display element of four row of l to l+3.Conventional display device row and column sum scope can hundreds of with thousand of it Between.The display element of row l is also referred to as pixel, is labeled as m to m+4.Each display element can have and the electrowetting list in Fig. 2 First 20,21,22 identicals construction.

Each display element of display device 32 includes the active component in one or more transistor version.Transistor can To be thin film transistor (TFT).Transistor is operated as switch.The electrode of display element is indicated as with electrode 17 and 25 Capacitor Cp.The line that the electrode 25 of capacitor is connected to ground is total holding wire 19, and the electrode 17 by capacitor The line for being connected to transistor is the holding wire 18 shown in Fig. 1.Display element may include optional capacitor Cs for storing mesh Or be consistent in whole display device for causing the duration of hold mode or being applied to the voltage of element.This Capacitor arranged parallel with Cp, and not separately shown in figure 3.Row driver is provided and the input data for display element Corresponding signal level.Line driver is provided for selecting the element of capable signal, the row set with specific display effect Put.Select row meaning that signal is placed on the holding wire of the row of the transistors switch of capable display element to closed mode.OK Selection be the part is addressed by the display element in active matrix display devices.Specific aobvious by applying a voltage to Show the row residing for element and select row residing for particular display element to be addressed particular display element.

When the transistor of display element receives the pulse on its row selection signal, transistor is changed into conductive and brilliant The signal level of its row driver is delivered to body pipe the electrode 17 of electrowetting unit.After transistor disconnects, on unit Voltage be substantially maintained and be again switched on by the next row selection signal for display element until transistor.Brilliant Time during the disconnection of body pipe is referred to as the hold mode of element.In this driven with active matrix method, electrowetting unit Electrode connects to driving stage when driving stage shows and is particularly shown time period of effect at the beginning.During this connection, The voltage relevant with desired display effect is applied to electrode.After electrowetting unit is disconnected with driver-level, Voltage during the time period that electrowetting unit shows display effect on electrode by one or more capacitors substantially It is maintained.Methods described is referred to as " active ", because display element includes at least one active component, such as transistor.

Fig. 4 illustrates the chart of the illustrative methods for driving the display element in active matrix display devices.This method exists Display image during a series of frame, such as display image within the duration of a frame.During frame, can be to display device All display elements are addressed；In a matrix, all row in the matrix of display device can be addressed during frame or Select all row in the matrix of display device.Fig. 4 illustrates two column signal Vl and Vl+1 and five row selection signal Vk ... Vk+ 4 as the time t of two continuous frame p and p+1 function.

When the row k of the pulse choice on row selection signal k is passed through, shown in as when in Fig. 4, frame p starts, each of row k shows Show each display unit that the transistor in element is changed into conduction and that the voltage on each column signal line 44 will be placed in row k On the electrode 26 of part.Subsequently, show that row driver 35 is changed into the value needed for row k+1 by the voltage on column signal line.When passing through During the row k+1 of the pulse choice on row selection signal k+1, voltage is placed on the electrode 26 of the display element of row k+1.Show dress That put all is about to be selected in frame p in a similar manner.The process of row is selected to restart in next frame p+1.

First kind embodiment

Display element can be controlled by DC drive scheme, in the DC drive scheme, all be applied to display element Electrode 17 and 25 voltage over time (i.e. in a frame and in subsequently multiple frame ins) with identical polarity, the electricity Pressure indicates the display effect shown by display element.This method is referred to as DC driving, or DC driven.It is applied to electrowetting The voltage for not indicating display effect of unit can have the polarity identical or different with the voltage of instruction display effect.Do not indicate to show The example for showing the voltage of effect is following voltage：The voltage is applied to the electrode of display unit and continues the very short time period, So that voltage will not cause the visible display effect of the eyes of observer, such as it is used for for reset pulse being applied to display unit The voltage of part.

Reset pulse can be provided to avoid backflow.Backflow is that while to be applied with the voltage for open mode, electrowetting list First fluid flowing in unit returns to the trend of the closed mode configuration of display element.For example, reset pulse can will apply electricity Pressure be decreased to zero long enough to reduce backflow, but the time is still short enough and observable display is not provided Effect.Fig. 5 illustrates the example for using of reset pulse.Fig. 5 be shown for the electrode 29 of some continuous frame electrowetting units with The chart of the voltage Ve between electrode 26.Frame is numbered along trunnion axis.First two frames illustrate that DC drives.Frame 1 does not have reset pulse, Frame 2 has reset pulse 50 in frame starting.Reset pulse in this example be apply voltages to zero of short duration skew.Reset Two addressing operations of the application needs within the relatively short time.In active matrix method, frame will be including the first subframe and Two subframes, first subframe are used for being addressed all display elements and arrange them to resetting voltage and described the Two subframes are used for being addressed all display elements and arranging them the voltage arrived for required display effect again；First Subframe and the second subframe were relatively closely close together due to the of short duration duration of reset pulse.

When the data input in display device needs the display effect of the display element of DC driving to occur big and frequently become During change, it may be necessary to which duration shorter frame is to avoid obscuring.Have what the extra address combined with short periodic frame was operated The application of reset pulse proposes high requirement to showing row driver 35, so as to cause high power consumption.

The embodiment of following methods is made a choice between DC drive scheme and AC drive scheme.However, can add can Selective more drive schemes.Can select together can be while some drive schemes for applying.

In AC drive scheme, the voltage bag of the electrode for being applied to display element and the display effect for indicating display element Include at least two voltages with opposed polarity.This scheme can change the voltage that is applied to electrode at regular intervals Polarity.Because with for DC drive compared with, for AC drive for, motion of the first fluid in electrowetting unit faster, institute With when using ac driving, compared with when being driven using DC, display element is by representing the big of display effect and frequently changing Tables of data reveal preferably response.

The reversion of polarity reduces the backflow in electrowetting unit.Therefore, when using this driving method and need not When implementing extra addressing operation, reset pulse can be omitted.Reduce the demand to showing row driver 35 to allow using shorter Frame is improving the switching of moving image.

The above method that selection can be carried out between DC is driven and driven with AC can be consumed compared with the method driven using AC Less power.Although AC drives can suitably show the big of display effect and frequently change and little and slow change Change, but AC drives to drive than DC and consumes more energy.Above method is driven to respond appropriately to big and frequent using AC Change, and show little and slow change during using DC drive so as to reduce power consumption.

As shown in the frame 3,4 and 5 in Fig. 5, AC drive scheme is can achieve, wherein for each subsequent frame, is applied The reversing of voltage.The frame 6 to 8 of Fig. 5 illustrates the another embodiment that AC drives.In this embodiment, frame is divided into Two subframes, are indicated by suffix a and b；Identical voltage level is applied to the electrowetting unit in two subframes, but in son Reversing between frame.In two subframes, display effect will be substantially the same, because display effect hardly receives applied voltage Polarity impact.In a further embodiment, per frame number of sub frames rise to 3,4 or more.

Frame 9 and frame 10 illustrate DC drive scheme to the transformation of AC drive scheme.Drive scheme is using per two subframes of frame.? In frame 9, by the identical voltage of instruction display effect that is applied in subframe 9a and subframe 9b with identical polar come DC Drive display element.Between frame 9 and frame 10, display control drives from DC and is switched to AC driving.In subframe 10a, will have The voltage level of particular polarity is applied to display element；In subframe 10b, apply the same voltage level with opposite polarity. Change in polarity also can occur in the transformation from a frame to next frame；For example, polarity can be in the transformation from subframe 9b to 10a When change so that the voltage in subframe 10a has negative polarity.

Subframe can be used to show interframe data.When between subsequent frame, data variation is larger, display controller can lead to Cross and enter row interpolation between subsequent frame to form intermediate data or interframe data.Interframe data can be arranged on aobvious in subframe Show on element.In such an implementation, the subframe of frame in is no longer needed with identical applied voltage level.

As shown in Fig. 2 holding wire can be changed by causing display driver 207 when next frame or subframe is moved to The polarity of the voltage on 218 and AC drive scheme is realized with direct driving method.Can be by the row letter in the frame p+1 of change Fig. 4 The polarity of number Vl and Vl+1 is completing the implementation in active matrix method.Therefore, the electricity of display element M to M+4 is applied to Pressure will change polarity between frame p and p+1.In another embodiment, each frame may be logically divided into two or more subframes, per Subframe applies the polarity of identical voltage level and the polarity inversion with respect to previous subframe.

When the driving of display device will drive from AC and DC driving is switched to, apply electricity no longer in the case of alternating polarity Press but apply the voltage with identical polar.When AC driving is transformed into from DC driving, no longer will apply with identical polar Voltage but apply with change polarity at least two voltages.

In instances, the characteristic of the data of the display effect for being shown by display element according to expression is come to for showing unit The drive scheme of part makes a choice.

Characteristic for selecting the data of drive scheme can drive the frame rate of display element or in display device The speed being input in input line for the new data for showing on the display element.Frame rate indicates to be carried out continuously display element to seek Location is to change the speed of the display effect of display element.

Fig. 6 schematically shows the example of so-called DC-AC driving method.Once it is determined that representing display effect to be shown Data frame rate, just will be when frame rate is less than predefined frame rate using DC drive scheme and will be big in frame rate In or be equal to predefined frame rate when using AC drive scheme.Predefined frame rate can be such as 20Hz.Can show The selection of drive scheme is made in controller 206 or 33.It is still possible that the user of display device can start the control of display device Part and manually drive scheme is arranged to DC and drive to show static content (such as book page) and by driving side Case arranges AC and drives to show dynamic content (such as video).

Characteristic for selecting the data of drive scheme can be difference, and the difference represents the subsequent display of display element Display effect change between effect.In the implementation using this characteristic, display controller is received and represents first by showing The data of the second display effect that the data of the first display effect that part shows and expression are shown by display element.Show control Device processed would indicate that the data of the first display effect and represent that the data of the second display effect are compared, and determine difference, institute State the change that difference indicates the display effect of display element.The selection of driving method can be based on this difference.For example, when display effect Optional AC drive scheme when changing greatly of fruit, and when the change of display effect may be selected DC drive scheme compared with hour.

Subsequent with two during for the display device of multiple display elements of display image in frame, can be directed to when driving Frame between all display elements determine the change of display effect.If a frame is after another frame, it is believed that two Individual frame be subsequent, and can be with any amount of frame, including zero between them.By contrast, if a frame followed by Another frame, then it is believed that two frames are continuous, do not have other frames between them.The data of the expression display effect of the first frame It is stored in the memory 38 of display controller 33.In the processor 37 of display controller, will be subsequent with second for this data The data of expression display effect of frame be compared.Difference in two frames between display effect can be used as select AC or The characteristic that DC drives.In instances, should be selected so that ought only several display elements show big display effect Difference is not while when the display effect of most of display element changes on a small quantity, use AC to drive.

Indicate that the difference of the change of the display effect between two frames can be determined by various modes.

The difference can be based on the value of the display effect change between the first frame and the second frame determining, or based on the The relative change of the display effect between one frame and the second pin is determining.For example, dispaly state can be in tonal gradation form 256 kinds of display effects in any one, such as display effect strength grade, numbering is 1 to 256, and 1 is the closing of display element State and 256 be display element full open position.Processor 37 can calculate two for all display elements in frame The value of the display effect change between frame.Predefined difference can be that the change of display effect has exceeded for display device Predefined quantity display element predefined change.If difference be more than predefined difference, for example two frames it Between the tonal gradation of 65% display element of display device change 60 or more, then can carry out being driven into changing for AC driving from DC Become.If being less than predefined difference for two frame differences, or in this example, tonal gradation changing 60 or more The quantity of display element can then carry out being driven into the change of DC driving from AC less than the half of display element.

The quantity of selection can also be that its grey states change has exceeded the display element of specific relative quantity (such as 40%) Quantity.Predefined difference can be that the display effect of half display element changes more than 40%.If the difference between frame Be such as 60% display element display effect change exceeded 40%, then can by select AC drive scheme change to make Become.

Determine difference another kind of method be by the display element of display device is aobvious in the first frame and the second pin Show effect be compared and display effect by display element display effect in the first frame and in the second frame between Difference is arranged in histogram.Fig. 7 illustrates the histogram of the value of the display effect change between two frames.Ginseng along vertical axis Number ni is the quantity of the display element that its display effect changes in particular range i.Trunnion axis illustrates that display effect change increases Five scopes.Actual change histogram can be compared with predefined histogram, drive scheme is selected to determine The difference of institute's foundation.It is also possible to use histogram to derive the statistical parameter for selecting institute's foundation, such as mean value or difference.

Indicate that the difference of display effect change between two frames can also be expressed with the form of estimating motion, such as move Vector.Motion vector represents the change of objects in images position between the subsequent frame of image.Estimating motion can be by such as The method of block matching algorithm, phase correlation method and frequency domain method, pixel-recursive algorithm and optical flow method is determining；These technology are known 's.This method generally forms the field of motion vector in image.Difference between frame can be expressed as such as largest motion vector Length or image in motion vector average length.

When the difference according to estimating motion is less than certain predefined value, DC driving method may be selected；When difference is more than During predefined value, AC driving method may be selected.

Identical drive scheme can be applied to above-mentioned first kind embodiment all display elements of display device.May be used also Can, the different piece of display device is driven using different drive schemes.For example, if one of shown image It is static to divide and a part is dynamic, then can drive dynamic part using AC drive scheme and using DC driving side Case is driving static part.In the driving means of active matrix type, the dynamic part of image is corresponding to specific row and spy Fixed row.For example as shown in the frame 6 to 8 of Fig. 5, when these row are selected, the voltage for being applied to these row should apply alternating current Pressure.As shown in the frame 1 of Fig. 5 and frame 2, the display element in the static part of image is driven.

Equations of The Second Kind embodiment

When all active matrix display devices as shown in Figure 3 are driven, show row driver 35 in each column signal line 44 Upper offer voltage.Fig. 4 is shown for the different voltages of columns of display elements l on several continuous row and l+1 by way of example Vl and Vl+1.When the display element in adjacent lines and same row needs extremely different voltage, for the driver that this arranges Level 43 must be exported with high-tension high-frequency signal.When show checkerboard pattern or the square including dark and light color or During foursquare pattern with different colours, such case may occur.Wish to reduce relatively high power consumption.

According to the example that will be described, electrowetting display device can be with many of the active matrix being arranged to row and column Individual display element, to the display element applied voltage and selects particular display element by the row along particular display element Go to be addressed particular display element.The method of electrowetting display device is driven to may include：Determine first group of row, for One group of row, is first model in the range of first to be applied to the voltage of predefined row or the display element in one group of row The degree of the degree that the encloses scope controlled less than the voltage；And continuously select the row in first group.

Fig. 8 schematically shows the stage of the staggered driving method of so-called row.Stage 61 and 62 is illustrated in previous paragraph Method.Between the departure date in selecting first group, the voltage on column signal line only changes in the range of first.Because high voltage with low The quantity changed between voltage is reduced, so the power consumption of row driver 35 reduces.

Fig. 9 a is shown for the chart of the current versus time of staggered driving method heating one frame in of embodiment of row.The side The first stage of method determines first group of row, wherein to be applied to the voltage in row be in the first predefined scope.In Fig. 8 a Example in, display element m, m+2 and m+4 for arranging in l need the voltage in the first scope 80.The degree of the first scope is little The degree from the minimum voltage range maximum to V of V in controllable applied voltage.The maximum accepted value of the minimum and V of V is respectively 0 And 30V.The first scope in this example extend to 5V from 0 and be in the end of voltage range；That is, the end of the first scope End is overlapped with the end of voltage range.First scope can also extend to 15V from 0.However, the first scope is can be located at from V minimum directly Any position in the maximum voltage range of V.Display element m, m+2 and m+4 are located on row k, k+2 and k+4 (referring to Fig. 3). Therefore, these row belong to first group.

In methods described so that, in the next stage, first group of row is continuous selection.This means selecting first group Select to be not belonging to the row of that group before or after row.Fig. 8 a is illustrated by the continuous impulse of row k, k+2 and k+4 and is selected the One group of row.In this example, other row, i.e. k+1 and k+3 are selected after the last column (k+4) that have selected first group. Between the departure date in selecting first group, the voltage arranged on the column signal line 44 of l changes in the boundary of the first scope, and arranges drive The power consumption of dynamic device 35 is by for relatively low.The staggered driving method of this method also referred to as row, wherein interlocks and refers to select Change on capable set of time.

Fig. 9 b is shown in and does not use the staggered driving method of row and select row according to row arrangement order in a matrix Voltage on the column signal line 44 of the following l of situation.Identical voltage is applied to five display element m in Fig. 9 a and Fig. 9 b extremely m+4.It is evident that compared with the method for Fig. 9 a, the method for Fig. 9 b needs substantially bigger voltage change.Therefore, with for The method of Fig. 9 b is compared, and for the method for Fig. 9 a, the power consumption of row driver 35 is less.

Fig. 9 c illustrates the another embodiment of the staggered driving method of row, and which is similar with the embodiment of Fig. 9 a, but wherein makes With the second predefined scope 81.Second scope be at the upper limit of the controlled voltage range of applied voltage；However, which can position In any position from the minimum voltage range maximum to V of V.First stage of methods described it needs to be determined that first group of row, its In to be applied to the voltage in row be in the range of first, and it needs to be determined that second group of row, wherein to be applied to the electricity in row Pressure be in the range of second.In the example of Fig. 8 c, the electricity that the display element m in l and m+2 needs fall in the first scope 80 is arranged Press and arrange the voltage that the display element m+1 in l and m+3 needs fall in the second scope 81.The degree of the second scope is less than from V The degree of the minimum voltage range maximum to V.The second scope in this example extends to 30V from 25V.Therefore, row k and row k+ 2 belong to first group, and row k+1 and row k+3 belong to second group.

In the example of Fig. 9 c, select first group of row k and k+2 first, secondly select to be not belonging to first group or second group Row k+4, and subsequently select row k+3 and k+1.Row each group in is continuously selected.Can change order of preference in group and The order of group and the order of other row can also be changed.Row can be selected according to applied voltage increase or the order for reducing.Can also press Row is selected according to row arrangement order in a matrix.Compared with for non-row interleave method, the row that are applied to as is shown in fig. 9 c are believed The voltage Vl of number line 44 has less big change.Determining, row belongs to second group of stage and the stage of these row selected in figure The stage 63 and 64 is shown as in 8.

For the display device with multiple row display element, determine that the method which row falls in the first set can be applied In specific row.Can also be by determining the mean value of the voltage to be applied to the display element in every a line changing the side Method.Display element in a line is averaged, the display element is disposed in one group of row.This group may include to show dress The all row that puts or the row of selection.The row of the average voltage having in the range of first belongs to first group.Determine and belong to one The additive method of the row of group is also possible.

Because the data in different frame are typically different, the rank of the row that can repeat to determine arbitrary group for each frame Section.

In colour display device, display element may be logically divided into sub- display element, be designed to per individual sub- display element Show particular color, for example red, green, blue and white (RGBW).The sub- display element of display element can be distributed in difference Row on.Two exemplary layout are illustrated in Figure 10 a and Figure 10 b.Figure 10 a illustrates two display elements 90, each has and divides Four sub- display elements of the cloth on two row and two row.Display element 91 in Figure 10 b have be distributed in three adjacent lines Three sub- display elements.If the display device of the layout with Figure 10 a shows consistent magenta for example as background, Will turn on the sub- display element of R and B and will be switched off the sub- display element of G and W.When scanning according to row arrangement order in a matrix During row, for arranging the voltage of l and l+1 by for castellation.The row driving method that interlocks will provide substantially more stably voltage, and Therefore reduce the power consumption for showing row driver 35.

3rd class embodiment

Electrowetting display device can be driven by analogue, drive scheme.In analogue, drive scheme, will indicate to show effect The voltage of fruit is applied to display element.The example of analog-driven is that AC drives and DC drives.When the data input in display device When needing the display effect of the display element of analog-driven to occur greatly and frequently change, the quality of shown image reduces. Wish the quality of the image shown by improving.Following embodiments improve the quality of shown image.

Pulsewidth modulation (pwm) scheme can be using first voltage and using during second round during the period 1 Two voltages are to drive display element.Period 1 can be before second round, and second round can be first Before cycle.First voltage is higher than second voltage.The duration of period 1 and second round determines the display effect that observes Really.First voltage can be equal to the maximum and second voltage of V can be minimum equal to V, and the maximum and V minimum of wherein V is controllable applying electricity The maximum voltage of the voltage range of pressure and minimum voltage.Because being driven in the case of it there is large change in applied voltage When movement of the first fluid in electrowetting unit faster, so compared with using analog-driven, when being driven using pulsewidth modulation When display element to represent display effect data that are big and frequently changing there is improved response.

Because analog-driven needs less power compared with driving with pwm, and all use for all input datas Pwm drive scheme is driven comparing, and uses the method needs of analogue, drive scheme or pwm drive scheme according to input data Less power.

Figure 11 illustrates the chart of simulation-pwm driving method.It illustrates the voltage Ve conduct of the electrode for being applied to display element The function of the time of three frame f1 ... f3.Each frame has three subframes, for frame f₁For they are marked as f1a, f_1b、 f1c.The ratio of the duration of three subframes is 1:2:4.Display element to display device during each frame is addressed three Secondary, each subframe is once.

Frame f1 illustrates analogue, drive scheme, and wherein voltage Ve is applied to the duration that display element continues the frame. When each subframe in frame f1 starts, identical voltage is applied to display element.This is the example that DC drives, and wherein applies All voltages to the instruction display effect of display element have identical polarity.In another example, the subframe of frame in has Equal length, this can be used for analogue, drive scheme and pwm drive scheme.In analogue, drive scheme, different applied voltage The fluid in display element is caused to have different configurations and therefore have different display effects.Can be obtained by analog-driven The different display effects for obtaining or the quantity of tonal gradation depend on the quantity of the exportable voltage level of driver.For example, drive Device can export 64 voltage levels corresponding to 6 bit depth.

Drive instead of using DC, AC driving is it is also possible to use, so that the polarity of applied voltage is for example between frames or in son Between frame alternately.

Frame f2 and frame f3 illustrate pulsewidth modulation (pwm) drive scheme.In first subframe f2a and the 3rd subframe f2c of f2, Applied voltage is relatively low, and the first fluid in display element will cover whole viewing area and the display element of display element Will be in disconnection or closed mode.In second subframe f2b of f2, applied voltage is higher, so as to cause first fluid to shrink simultaneously And the open mode of display element is shown.The voltage applied in pwm scheme does not indicate display effect.Display effect depends on applying Plus the cycle of the cycle of first voltage and applying second voltage.

Display effect in frame f2 is to close during 5/7 frame period and is to open during 2/7 frame period 's.Because the duration of frame is relatively short, the eyes of observer will be carried out averagely to the impression of two states.Therefore, Frame f2 will be shown in the tonal gradation on the yardstick of 1 (closing) to 8 (opening) for 3.Frame f3 is shown as 6 tonal gradation.Three Subframe can be shown that 8 tonal gradations, or 3 bit depth.

The voltage change of the Ve of Figure 11 can be realized in the display device of direct drive type in the following manner：To Fig. 2 In display controller 206 and display driver 207 be programmed, so as to the voltage required for arranging on holding wire 5, described Holding wire 5 is connected to the electrode of display element, and set of time is corresponding to the subframe in each frame.

Implementation offer in the display device of active matrix type in subframe in each frame is to display element It is addressed.Can realize, by the voltage on column signal line is suitably selected for subframe, the selection driven by simulation or pwm.

Carried out from analog-driven to pulsewidth according to the characteristic of the data of the expression display effect being input in display device Change and inverse change that modulation drives.The characteristic of data is similar to the characteristic of above-mentioned first kind embodiment.For example, data Characteristic can be frame rate or difference.The characteristic can by with above in relation to described in first kind embodiment by way of identical Mode obtain and with similar selection standard.Can execute as described in above in relation to the first kind and be directed to multiple The determination of the characteristic of the display device of display element.

4th class embodiment

Electrowetting display device can be driven by DC drive scheme.When the data input in display device needs to show unit The display effect of part big and when frequently changing, the quality of shown image reduces.Wish to improve shown image Quality.Following embodiments improve the quality of shown image.

In driving method, electrowetting display device has for showing display effect during the display cycle at least One display element.Methods described may include：For example, receive and represent the first display effect shown by least one display element The data of fruit；And reception represents that shown by least one display element after the first display effect is shown second shows Show the data of effect.Can would indicate that the data of the first display effect and the data for representing the second display effect are compared to determine Indicate the difference of the change of display effect.The drive scheme at least one display element can be selected according to difference.Can be extremely Make a choice from the first drive scheme and the second drive scheme less.In the first drive scheme, will refer to during the display cycle Show that the voltage of display effect is applied to the number of times that at least one display element reaches the first quantity.In the second drive scheme, aobvious The voltage for indicating display effect is applied to the number of times that at least one display element reaches the second quantity during showing the cycle.Second quantity Different from the first quantity.First quantity can be more than the second quantity, and the second quantity can be more than the first quantity.Methods described is multiple The voltage for indicating display effect is applied to the electrode of display element or display element, the wherein value of number of times depends on difference.Secondary Number can be with any integer value for being more than zero.

Methods described may be configured such that the step of display effect increases causes voltage to be applied to display element in a large number, because This electric charge required for obtaining on the electrode of display element and voltage.

It has been observed that, the display effect of display element big and frequently change and multiple applied voltage may be needed, To be charged reaching the level of the display effect for being suitable for be shown to display element.In embodiments above, apply The number of times of voltage is determined according to the difference of the change for indicating display effect.

Figure 12 illustrates the chart of many data Write-in driving method.The voltage Ve for being applied to display element electrode is shown as six The function of the time of individual frame f10 ... f15.The display effect of display device, the display is shown during the display cycle 100 Cycle 100 is identical with the duration of a frame or length in this example.

Voltage change between frame f10 and f11 indicates the display effect of display element.Therefore, between frame f10 and f11 The change of applied voltage indicates the change of display effect.The value of display effect change can be considered as between frame f10 and f11 Difference.In the example of fig. 1, the difference between frame f10 and f11 is less than predefined value, and therefore during frame f11, First quantity drives display element using the first drive scheme in the case of being equal to one.

In the transformation from frame f11 to f12, the change of display effect is with different from the transformation from frame f10 to f11 Mark.If difference is the value of display effect change, these changes can be similarly processed, so that difference Mark independently of change.Or, can for example by only consideration display effect positive change come consider mark.

Transformation from frame f12 to f13 shows the relatively large change of display effect.Difference is now greater than predefined value And the second drive scheme is selected for frame f13.The value of the second quantity in this example is two, so as to cause in phase display cycle Between applied voltage twice.It is that it is to apply it in first time to apply 102 for second when starting the display cycle to apply 101 for the first time Afterwards but within the display cycle.As shown in figure 12, when being gathered in the display cycle and starting nearby, second and other voltage are applied Plus be effective.

From frame f14 to frame f15 transformation when dispaly state bigger change cause voltage three times to apply 103, 104th, 105 display element is arrived.

Can be set by the display applied using subframe in active matrix type for each second or other voltage Methods described is realized in standby.For example, in frame f13, the display element to display device is addressed and by appropriate voltage It is applied to column signal line.After this addressing operation soon, subframe causes next addressing operation, so as to by identical voltage It is applied to column signal line.

Changed according to the difference as the characteristic for being input in display device the data for representing display effect and showing week Interim one or many is to the applied voltage of display element.Difference is similar to the difference of above-mentioned first kind embodiment.Difference can To be that the change of such as display effect or the changing for the dispaly state having of display device are more than the predefined display for changing The quantity of element.From in 1 to 256 tonal gradation, predefined change is, for example, 60.

Difference can by with above in relation to described in first kind embodiment by way of identical mode obtain and with class As selection standard.Can execute as described in above in relation to the first kind for the display device with multiple display elements The determination of characteristic.

Embodiments above will be understood as illustrative example.It is contemplated that further embodiment.For example, embodiment The drive scheme with more high frame rate is may include, the drive scheme individually or with above-mentioned drive scheme can be tied Close to be selected.

Further example is given in terms section after a while.

It should be understood that the described any feature with regard to any one embodiment can be used alone, or with retouched The further feature that states is used in combination, and also can be any combination of with any other embodiment or any other embodiment One or more features are used in combination.Additionally, without departing from the scope of the appended claims, it is also possible to use above Equivalents and modifications not described.

Clause

A1. a kind of driving has the electrowetting display device of at least one display element for being used for showing display effect Method, methods described include

Receive the data for representing the display effect shown by least one display element；

Characteristic according to the data selects the drive scheme at least one display element, the drive scheme Select at least from the following：

A) DC drive scheme, is wherein applied to all voltages tool of the instruction display effect of at least one display element There is identical polarity, and

B) AC drive scheme, the voltage for being wherein applied to the instruction display effect of at least one display element include tool There are at least two voltages of opposed polarity；

The display element is driven using selected drive scheme.

A2. the method according to clause A1, the personality presentation of wherein described data drive described at least one to show Show the frame rate of element, the frame rate indicate to be carried out continuously at least one display element addressing with change described at least The speed of the display effect of one display element.

A3. the method according to clause A2, it include to select institute when the frame rate is less than predefined frame rate State DC drive scheme and the AC drive scheme is selected when the frame rate is equal to or higher than the predefined frame rate.

A4. the method according to clause A1, wherein described receiving data include

Receive the data for representing the first display effect shown by least one display element；And

Receive and represent the shown by least one display element after first display effect is shown The data of two display effects；Methods described includes：

Would indicate that the data of first display effect and the data for representing second display effect are compared with true The difference of the change of the display effect is indicated surely, and the difference is the characteristic of the data.

A5. the method according to clause A4, wherein described difference table show the described aobvious of at least one display element Show the value of the change of effect.

A6. the method according to clause A4, wherein described electrowetting display device have multiple display elements, and institute The change of the display effect that difference represents that many display elements have is stated more than predefined change.

A7. the method according to clause A4, wherein described electrowetting display device have multiple display elements, the side Method includes the change of the display effect of the display element is arranged in histogram and derives from the histogram described The characteristic of data.

A8. the method according to clause A1, which includes to be applied to reset pulse in DC driving period and described shows unit Part is to reduce the backflow in the display element.

A9. the method according to clause A1, wherein described tables of data are shown by least one display element for many The display effect that individual frame shows, the AC drive scheme change the voltage for being applied to the display element between subsequent frame Polarity.

A10. a kind of display controller for electrowetting display device, the display controller include at least one process Device and at least one memory including computer program instructions,

The display device includes at least one display element for showing display effect；

At least one memory and the computer program instructions are configured to using at least one processor The display controller is caused to execute the method for driving the display device, methods described includes：

Drive scheme at least one display element, the driving side are selected according to the characteristic of the data Case is selected at least from the following：

The display element is driven using selected drive scheme.

A11. the display controller according to clause A10, the personality presentation of wherein described data drive described in extremely The frame rate of a few display element, the frame rate indicate to be carried out continuously at least one display element addressing to change The speed of the display effect of at least one display element.

A12. the display controller according to clause A11, wherein methods described are included when the frame rate is less than predetermined The DC drive scheme is selected during the frame rate of justice and when the frame rate is equal to or higher than the predefined frame rate Select the AC drive scheme.

A13. the display controller according to clause A10, wherein described receiving data include：

A14. the display controller according to clause A13, wherein described difference table show at least one display element The display effect the change value.

A15. the display controller according to clause A13, wherein described electrowetting display device have and multiple show unit Part, and the difference represents the change of the display effect that many display elements have more than predefined change.

A16. the display controller according to clause A13, wherein described electrowetting display device have and multiple show unit Part, methods described include the change of the display effect of the display element to be arranged in histogram and from the histogram Derive the characteristic of the data.

A17. the display controller according to clause A10, which is configured to apply reset pulse in DC driving period To the display element to reduce the backflow in the display element.

A18. the display controller according to clause A10, the data represent by least one display element pin The display effect shown by multiple frames, the display controller are configured to during the AC drive scheme in subsequent frame Between change be applied at least one display element voltage polarity.

A19. a kind of Electrowetting display device, it include display controller according to clause A10, display driver with And the display device including at least one display element.

A20. a kind of computer program, which includes the non-transitory computer for being stored thereon with computer-readable instruction Readable storage medium storing program for executing, the computer-readable instruction can be executed by computerized device to cause the computerized device to execute Drive the method having for showing the electrowetting display device of at least one display element of display effect, methods described bag Include

The display element is driven using selected drive scheme.

A21. the computer program according to clause A20, the personality presentation of wherein described data drive institute State the frame rate of at least one display element, the frame rate indicate to be carried out continuously at least one display element addressing with Change the speed of the display effect of at least one display element.

A22. the computer program according to clause A21, wherein methods described include to be less than when the frame rate The DC drive scheme is selected during predefined frame rate and when the frame rate is equal to or higher than the predefined frame speed The AC drive scheme is selected during rate.

A23. the computer program according to clause A20, wherein described receiving data include：

Receive and represent the shown by least one display element after first display effect is shown The data of two display effects, methods described include：

B1. a kind of method for driving the electrowetting display device for display image, the display device have and are arranged to Multiple display elements of the matrix with row and column, by applying a voltage to the row of particular display element and selecting institute State the row of particular display element to be addressed that methods described includes to the particular display element：

Determine first group of row, for first group of row, to be applied to predefined row or the electricity of the display element in one group of row Pressure is the degree of the degree of first scope scope controlled less than the voltage in the range of first；And

The row described first group in is continuously selected.

B2. the method according to clause B1, which also includes

Display image in frame；And

The determination and the selection are executed at least one of described frame.

B3. the method according to clause B1, wherein described display element are divided into the son being arranged at least two row and show Show element.

B4. the method according to clause B1, which also includes：

Determine second group of row, wherein to be applied to described in the predefined row or the display element in one group of row Voltage is that second scope is not overlap with first scope in the range of second；

The row described second group in is continuously selected.

B5. the method according to clause B1, wherein described voltage in voltage range be controlled, and described first Scope be in the end of the voltage range.

B6. the method according to clause B4, wherein described voltage in voltage range be controlled, and described second Scope be in the end of the voltage range.

B7. the method according to clause B4, wherein described voltage in voltage range be controlled, and described first Scope be in an end of the voltage range and second scope be in another end of the voltage range.

B8. a kind of display controller for electrowetting display device, the display controller include at least one process Device, include at least one memory of computer program instructions and the data for representing image of the display controller Input,

The display device includes the multiple display elements for being arranged to the matrix with row and column, can be by applying voltage To the row of particular display element and select the row of the particular display element to enter the particular display element Row addressing,

Determine first group of row, wherein the voltage to be applied to predefined row or the display element in one group of row be first In the range of, the degree of first scope is less than the degree of the controlled scope of the voltage；And

The row described first group in is continuously selected.

B9. the display controller according to clause B8, which is configured to show described image in frame；And for institute State at least one of frame and execute the determination and the selection.

B10. the display controller according to clause B8, wherein described display element are divided into and being arranged at least two row Sub- display element.

B11. the display controller according to clause B8, which is configured to carry out：

Determine second group of row, wherein to be applied to the predefined row or the voltage of the display element in one group of row It is that second scope is not overlap with first scope in the range of second；

The row described second group in is continuously selected.

B12. the display controller according to clause B8, wherein described voltage in voltage range be controlled, and First scope is close to the end of the voltage range.

B13. the display controller according to clause B11, wherein described voltage in voltage range be controlled, and Second scope is close to the end of the voltage range.

B14. the display controller according to clause B11, wherein described voltage in voltage range be controlled, and First scope is close to an end of the voltage range and second scope is close to the another of the voltage range End.

B15. a kind of Electrowetting display device, it include display controller according to clause B8, display driver with And the display device including multiple display elements.

B16. a kind of computer program, which includes the non-transitory computer for being stored thereon with computer-readable instruction Readable storage medium storing program for executing, the computer-readable instruction can be executed by computerized device to cause the computerized device to execute The method for driving the electrowetting display device for display image,

The display device has the multiple display elements for being arranged to the matrix with row and column, by applying a voltage to The row of particular display element and select the row of the particular display element to carry out the particular display element Addressing, methods described include：

Determine first group of row, wherein the voltage to be applied to predefined row or the display element in one group of row be In the range of first, the degree of first scope is less than the degree of the controlled scope of the voltage；And

The row described first group in is continuously selected.

B17. the computer program according to clause B16, wherein methods described include

Show described image in frame；And

B18. the computer program according to clause B16, wherein described display element are divided into and being arranged at least Sub- display element on two row.

B19. the computer program according to clause B16, wherein methods described include：

The row described second group in is continuously selected.

B20. the computer program according to clause B16, wherein described voltage in voltage range be controlled, And first scope be in the end of the voltage range.

B21. the computer program according to clause B19, wherein described voltage in voltage range be controlled, And second scope be in the end of the voltage range.

B22. the computer program according to clause B19, wherein described voltage in voltage range be controlled, And first scope be in an end of the voltage range, and second scope be in the voltage range Another end.

C1. a kind of method that driving has the electrowetting display device of at least one display element, methods described include：

The data for representing the display effect shown by least one display element are received,

A) analogue, drive scheme, wherein indicates that the voltage of the display effect is applied to the display element；And

B) pulsewidth modulation drive scheme, wherein during the period 1 by first voltage be applied to the display element and Second voltage is applied to the display element during second round, the first voltage is higher than the second voltage, described The duration of period 1 and the second round determines the display effect；

The display element is driven using selected drive scheme.

C2. the method according to clause C1, the personality presentation of wherein described data drive described at least one to show Show the frame rate of element, the frame rate indicate to be carried out continuously at least one display element addressing with change described at least The speed of the display effect of one display element.

C3. the method according to clause C2, it include to select institute when the frame rate is less than predefined frame rate State analogue, drive scheme and the pulsewidth modulation is selected when the frame rate is equal to or higher than the predefined frame rate Drive scheme.

C4. the method according to clause C1, wherein described receiving data include：

C5. the method according to clause C4, wherein described difference table show the described aobvious of at least one display element Show the value of the change of effect.

C6. the method according to clause C4, wherein described electrowetting display device have multiple display elements, and institute The change of the display effect that difference represents that many display elements have is stated more than predefined change.

C7. the method according to clause C4, wherein described electrowetting display device have multiple display elements, the side Method includes the change of the display effect of the display element is arranged in histogram and derives from the histogram described The characteristic of data.

C8. a kind of display controller for electrowetting display device, the display controller include at least one process Device and at least one memory including computer program instructions,

The display device includes at least one display element for showing display effect,

The display element is driven using selected drive scheme.

C9. the display controller according to clause C8, the personality presentation of wherein described data drive described at least The frame rate of one display element, the frame rate indicate to be carried out continuously at least one display element addressing to change State the speed of the display effect of at least one display element.

C10. the display controller according to clause C9, wherein methods described are included when the frame rate is less than predefined Frame rate when select the analogue, drive scheme and when the frame rate be equal to or higher than the predefined frame rate when Select the pulsewidth modulation drive scheme.

C11. the display controller according to clause C8, wherein described receiving data include

C12. the display controller according to clause C11, wherein described difference table show at least one display element The display effect the change value.

C13. the display controller according to clause C11, wherein described electrowetting display device have and multiple show unit Part, and the difference represents the change of the display effect that many display elements have more than predefined change.

C14. the display controller according to clause C11, wherein described electrowetting display device have and multiple show unit Part, the display controller include the change of the display effect of the display element is arranged in histogram and from described straight Square in figure derives the characteristic of the data.

C15. a kind of Electrowetting display device, it include display controller according to clause C8, display driver with And the display device including at least one display element.

C16. a kind of computer program, which includes the non-transitory computer for being stored thereon with computer-readable instruction Readable storage medium storing program for executing, the computer-readable instruction can be executed by computerized device to cause the computerized device to execute Drive the method having for showing the electrowetting display device of at least one display element of display effect, methods described bag Include：

The display element is driven using selected drive scheme.

C17. the computer program according to clause C16, the personality presentation of wherein described data drive institute State the frame rate of at least one display element, the frame rate indicate to be carried out continuously at least one display element addressing with Change the speed of the display effect of at least one display element.

C18. the computer program according to clause C17, it are included when the frame rate is less than predefined frame The DC drive scheme is selected during speed and selects institute when the frame rate is equal to or higher than the predefined frame rate State AC drive scheme.

C19. the computer program according to clause C16, wherein described receiving data include：

D1. a kind of driving has the electricity for showing at least one display element of display effect during the display cycle The method of wetting display device, methods described include

Receive the data for representing the first display effect shown by least one display element；

Receive and represent the shown by least one display element after first display effect is shown The data of two display effects；

Would indicate that the data of first display effect and the data for representing second display effect are compared with true The difference of the change of the display effect is indicated surely；

The drive scheme at least one display element is selected according to the difference, and the drive scheme is at least Select from the following：

A) the first drive scheme, wherein during the display cycle by the voltage for indicating display effect be applied to described extremely A few display element reaches the number of times of the first quantity, and

B) the second drive scheme, wherein during the display cycle by the voltage for indicating display effect be applied to described extremely A few display element reaches the number of times of the second quantity, and second quantity is different from first quantity；

The display element is driven using selected drive scheme.

D2. the method according to clause D1, wherein described difference table show the described aobvious of at least one display element Show the value of the change of effect.

D3. the method according to clause D2, wherein described second quantity are more than first quantity, and methods described includes First drive scheme is selected when the difference is less than predefined value and when the difference is equal to or more than described pre- Second drive scheme is selected during the value of definition.

D4. the method according to clause D1, wherein described electrowetting display device have multiple display elements, and institute The change of the display effect that difference represents that many display elements have is stated more than predefined change.

D5. the method according to clause D4, it include to select described the when the difference is less than predefined numeral One drive scheme and when the difference be equal to or more than described predefined numeral when select second drive scheme.

D6. the method according to clause D1, wherein described electrowetting display device have multiple display elements, the side Method includes the change of the display effect of the display element is arranged in histogram and derives from the histogram described The characteristic of data.

D7. the method according to clause D1, which also includes：Reset pulse is applied to the display element to reduce State the backflow in display element.

D8. a kind of display controller for electrowetting display device, the display controller include at least one process Device and at least one memory including computer program instructions,

At least one memory and the computer program instructions are configured to using at least one processor The display driving system is caused to execute the method for driving the display device, methods described includes：

The display element is driven using selected drive scheme.

D9. the display controller according to clause D8, wherein described difference is the institute of at least one display element State the value of the change of display effect.

D10. the display controller according to clause D9, wherein described second quantity are more than first quantity, and Methods described includes to select first drive scheme and when the difference is equal to when the difference is less than predefined value Or second drive scheme is selected during more than the predefined value.

D11. the method according to clause D8, wherein described electrowetting display device have multiple display elements, and The difference represents the change of the display effect that many display elements have more than predefined change.

D12. the method according to clause D11, it include to select when the difference is less than predefined numeral described First drive scheme and when the difference be equal to or more than described predefined numeral when select second drive scheme.

D13. the display controller according to clause D8, wherein described electrowetting display device have and multiple show unit Part, methods described include the change of the display effect of the display element to be arranged in histogram and from the histogram Derive the characteristic of the data.

D14. the display controller according to clause D8, which is configured to for reset pulse to be applied to the display element To reduce the accumulation of electric charge in the display element.

D15. a kind of Electrowetting display device, it include display controller according to clause D8, display driver with And the display device including at least one display element.

D16. a kind of computer program, which includes the non-transitory computer for being stored thereon with computer-readable instruction Readable storage medium storing program for executing, the computer-readable instruction can be executed by computerized device to cause the computerized device to execute Drive the method having for showing the electrowetting display device of at least one display element of display effect, methods described bag Include：

The display element is driven using selected drive scheme.

D17. the computer program according to clause D16, wherein described difference table show at least one display The value of the change of the display effect of element.

D18. the computer program according to clause D17, wherein described second quantity are more than first quantity, And methods described includes to select first drive scheme when the difference is less than predefined value and when the difference Second drive scheme is selected during equal to or more than the predefined value.

D19. the computer program according to clause D16, wherein described electrowetting display device have multiple aobvious Show element, and the difference represents the change of the display effect that many display elements have more than predefined change.

D20. the computer program according to clause D19, wherein methods described are included when the difference is less than pre- Definition digital when select first drive scheme and when the difference be equal to or more than described predefined numeral when select Select second drive scheme.

Claims

1. a kind of driving has the method for showing the electrowetting display device of at least one display element of display effect, Methods described includes

Drive scheme at least one display element is selected according to the characteristic of the data, the drive scheme is extremely Few selection from the following：

A) DC drive scheme, all voltages for being wherein applied to the instruction display effect of at least one display element have phase Same polarity, and

B) AC drive scheme, the voltage for being wherein applied to the instruction display effect of at least one display element include have not At least two voltages of same polarity；

The display element is driven using selected drive scheme.

2. method according to claim 1, wherein described receiving data include

Receive and represent that shown by least one display element after first display effect is shown second shows Show the data of effect；Methods described includes：

Would indicate that the data of first display effect and the data for representing second display effect are compared to determine to refer to Show the difference of the change of the display effect, the difference is the characteristic of the data.

3. method according to claim 2, wherein described difference table show the display of at least one display element The value of the change of effect.

4. method according to claim 2, wherein described electrowetting display device have multiple display elements, and described Difference represents the change of the display effect that many display elements have more than predefined change.

5. method according to claim 2, wherein described electrowetting display device have multiple display elements, methods described Including the change of the display effect of the display element to be arranged in histogram and derives from the histogram number According to the characteristic.

6. method according to claim 1, which includes, in DC driving period, reset pulse is applied to the display element To reduce the backflow in the display element.

7. method according to claim 1, wherein described tables of data are shown by least one display element for multiple The display effect that frame shows, the AC drive scheme change the voltage that is applied to the display element between subsequent frame Polarity.

8. a kind of display controller for electrowetting display device, the display controller include at least one processor and bag At least one memory of computer program instructions is included,

At least one memory and the computer program instructions are configured to cause using at least one processor The display controller executes the method for driving the display device, and methods described includes：

The display element is driven using selected drive scheme.

9. method according to claim 1 or display controller according to claim 8, the institute of wherein described data The frame rate that personality presentation drives at least one display element is stated, the frame rate indicates to show unit to described at least one Part is carried out continuously and addresses to change the speed of the display effect of at least one display element.

10. method according to claim 9 or display controller according to claim 9, wherein when frame speed The DC drive scheme is selected when rate is less than predefined frame rate and when the frame rate is equal to or higher than described predefining Frame rate when select the AC drive scheme.

11. display controllers according to claim 8, wherein described receiving data include：

12. display controllers according to claim 11, wherein described difference table show at least one display element The value of the change of the display effect.

13. display controllers according to claim 11, wherein described electrowetting display device have multiple display elements, And the difference represents the change of the display effect that many display elements have more than predefined change.

14. display controllers according to claim 11, wherein described electrowetting display device have multiple display elements, Methods described includes the change of the display effect of the display element is arranged in histogram and leads from the histogram Go out the characteristic of the data.

15. display controllers according to claim 8, its are configured to, in DC driving period, reset pulse is applied to institute Display element is stated to reduce the backflow in the display element.

16. display controllers according to claim 8, the data represent by least one display element for many The display effect that individual frame shows, the display controller are configured to during the AC drive scheme between subsequent frame Change the polarity of the voltage for being applied at least one display element.