CN102651199A - Bistable display and drive method and drive device of bistable display - Google Patents
Bistable display and drive method and drive device of bistable display Download PDFInfo
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Abstract
The invention provides a bistable display and a drive method and a drive device of the bistable display. The bistable display comprises a display panel. The drive method comprises the following steps of: respectively storing first area data and second area data which are sequentially received in a first queue and a second queue; sequentially calculating first area images and second area images corresponding to the first area data and the second area data; and starting to display the first area images in a first frame period of a first period by the display panel, and starting to display the second area images in a second frame period of the first period by the display panel. When time passes the first period, the first area images are in stable states on the display panel; and when time passes the total of the first period and the second frame period, the second area images are in stable states on the display panel. According to the bistable display and the drive method and the drive device of the bistable display, provided by the invention, the whole updating time of a display frame can be shortened.
Description
Technical field
The present invention relates to a kind of display and driving method thereof and drive unit, and be particularly related to a kind of bistable state (bistable) display and driving method and drive unit.
Background technology
Flourish along with digital media content and display technique, flat-panel screens has become the main interface for people and numerical information.In recent years; Electric paper display (e-paper display, development EPD) is quite flourishing since electric paper display can be on same digital platform the characteristic of display digit content; The user can be easy to obtain different digital contents, so the trend that replaces traditional Hard copy reading habit is arranged gradually.
On the other hand, (liquid crystal display, LCD) etc. display device because electric paper display has bistable state (bistable) characteristic, only just needs driving voltage, so comparatively power saving when new picture compared to LCD.Yet although electric paper display has many advantages, the frame updating time of most of electric paper displays is quite long, thus can't present animation effect, and for interactive application, for example pen is followed the trail of and the demonstration of video signal is problematic.Therefore, develop a kind of technology that promotes the renewal speed of electric paper display, suitable needs are arranged in fact.
Summary of the invention
The present invention provides a kind of bistable display and driving method and drive unit, can shorten the update time of display frame.
The present invention proposes a kind of driving method, is suitable for a bistable state display.Bistable display comprises a display panel.Driving method may further comprise the steps: first area data that will receive in regular turn and second area data are stored in one first formation and one second formation respectively in regular turn; Calculate a pairing first area image of first area data and second area data and a second area image in regular turn; And the frame cycle make display panel begin to show the first area image, and make display panel begin to show the second area image in the one second news frame cycle of period 1 in one first news of a period 1.When the time was passed through the period 1, the first area image was in steady state (SS) on display panel, and when the time was interrogated the summation in frame cycle through the period 1 and second, the second area image was in steady state (SS) on display panel.
In one embodiment of this invention, the above-mentioned first news frame cycle in the period 1 makes display panel begin to show that the step of first area image comprises: with the first area image storage in an events buffer; With the current news frame of first area copying image to one impact damper, to form one first news block diagram picture; And relatively the first news block diagram picture and had before been interrogated the block diagram picture, so that display panel begins to show the first area image according to one first comparative result in the first news frame cycle.
In one embodiment of this invention, the above-mentioned second news frame cycle in the period 1 makes display panel begin to show that the step of second area image comprises: according to second area image update events buffer; To current news frame impact damper, to form one second news block diagram picture, wherein the second news block diagram looks like to comprise first area image and second area image with second area copying image; And the relatively second news block diagram picture and previous news block diagram picture, so that display panel begins to show the second area image according to one second comparative result in the second news frame cycle.
In one embodiment of this invention, the above-mentioned step according to second area image update events buffer comprises: with the second area image storage in events buffer.
In one embodiment of this invention, the above-mentioned step according to second area image update events buffer also comprises: the first area image in the deletion event impact damper.
In one embodiment of this invention, above-mentioned previous news block diagram looks like to be stored in a previous news frame impact damper.
In one embodiment of this invention, driving method is further comprising the steps of: when the time when the period 1, with first area copying image to before interrogating the frame impact damper to upgrade previous news frame impact damper; And when time during through the summation in period 1 and the second news frame cycle, with second area copying image to before interrogating the frame impact damper to upgrade previous news frame impact damper.
In one embodiment of this invention, interrogate the block diagram picture not simultaneously with previous, export first comparative result according to a question blank when the first news block diagram picture.
In one embodiment of this invention, driving method also comprises first formation is set at an idle state.
In one embodiment of this invention, the above-mentioned period 1 is the integral multiple in the first news frame cycle.
In one embodiment of this invention, above-mentioned first area data comprise at least the first area image starting point coordinate, picture traverse, image length and with one of image picture element.
The present invention also provides a kind of drive unit, is suitable for a bistable state display.Bistable display comprises a display panel.Drive unit comprises one first formation, one second formation and a controller.First area data and second area data that controller will receive in regular turn are stored in first formation and second formation respectively in regular turn, and calculate first area data and a pairing first area image of second area data and a second area image in regular turn.Then, controller makes display panel begin to show the first area image in the one first news frame cycle of a period 1, and makes display panel begin to show the second area image in the one second news frame cycle of period 1.When the time was passed through the period 1, the first area image was in steady state (SS) on display panel, and when the time was interrogated the summation in frame cycle through the period 1 and second, the second area image was in steady state (SS) on display panel.
In one embodiment of this invention, drive unit also comprises a storer, and it couples controller.Storer comprises an events buffer and a current news frame impact damper.Events buffer stores the first area image.Controller to current news frame impact damper, is interrogated block diagram picture to form one first with first area copying image.Then, controller is the first news block diagram picture and a previous news block diagram picture relatively, so that display panel begins to show the first area image according to one first comparative result in the first news frame cycle.
In one embodiment of this invention, above-mentioned controller is also according to second area image update events buffer, and with second area copying image to current news frame impact damper, to form one second news block diagram picture.Wherein the second news block diagram looks like to comprise first area image and second area image.Controller is the second news block diagram picture and previous news block diagram picture relatively, so that display panel begins to show the second area image according to one second comparative result in the second news frame cycle.
In one embodiment of this invention, above-mentioned controller also with the second area image storage in events buffer.
In one embodiment of this invention, the above-mentioned controller first area image in the deletion event impact damper also.
In one embodiment of this invention, above-mentioned storer also comprises a previous news frame impact damper, and has before interrogated block diagram and look like to be stored among the previous news frame impact damper.
In one embodiment of this invention, when the time when the period 1, controller with first area copying image to before interrogating the frame impact damper to upgrade previous news frame impact damper.When time during through the summation in period 1 and the second news frame cycle, controller with second area copying image to before interrogating the frame impact damper to upgrade previous news frame impact damper.
In one embodiment of this invention, drive unit also comprises a question blank.Interrogate the block diagram picture not simultaneously when the first news block diagram picture with previous, controller is exported first comparative result according to question blank.
In one embodiment of this invention, above-mentioned controller also is set at an idle state with first formation.
In addition, the present invention also provides a kind of bistable display, and it comprises above-mentioned drive unit.
In one embodiment of this invention, above-mentioned bistable display is an electric paper display.
Based on above-mentioned; In an embodiment of the present invention; Come to calculate in regular turn corresponding respectively a first area image and a second area image according to first area data that are stored in first formation and second area data; So that display panel just can begin to show the second area image, so can shorten the whole updating time of display frame when showing that one section all after date of first area image and first area image do not reach steady state (SS) as yet.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and conjunction with figs. elaborates as follows.
Description of drawings
Fig. 1 is the synoptic diagram of the bistable display of one embodiment of the invention.
Fig. 2 A and Fig. 2 B are the drive waveforms of drive unit 120 among the embodiment.
Fig. 2 C is the enlarged diagram of the news frame cycle T 1 of Fig. 2 A.
Fig. 3 is the process flow diagram of the driving method of one embodiment of the invention.
Fig. 4 is the synoptic diagram of the area image of one embodiment of the invention.
Fig. 5 is the detail flowchart of the driving method of Fig. 3.
Fig. 6 A to Fig. 6 G is the time dependent synoptic diagram of display panel.
Fig. 7 is another detail flowchart of the driving method of Fig. 3.
Fig. 8 A to Fig. 8 G is the synoptic diagram of the driving method of Fig. 7.
The primary clustering symbol description:
100: bistable display
110: display panel
120: drive unit
122: controller
124: storer
126: question blank
130: CPU
140: HPI
150: display interface
Q1～Q3: formation
CF: current news frame impact damper
PF: before interrogated the frame impact damper
EF: events buffer
EF ': incident news frame impact damper
EF ": incident is impact damper partly
A1～A3: area image
F0: before interrogated the block diagram picture
F1～F3: news block diagram picture
D1～D3: area data
S1～S4: comparative result
T0: cycle
T1: news frame cycle
Tv: vertical-scan period
Tvd: vertical display cycle
Tvb: vertical non-display cycle
Th: horizontal scanning period
Thd: level display cycle
Thb: non-display cycle of level
L: length
W: width
(Xi, Yi), (X1, Y1)～(X3, Y3): origin coordinates
S110～S130, S200～S290, S320: actuation step
Embodiment
Among the embodiment down below, will with electric paper display (e-paper display, EPD) as embodiment, any under those skilled in the art when knowing that electric paper display is not in order to limit the present invention.
Fig. 1 is the synoptic diagram of bistable state (bistable) display of one embodiment of the invention.Please refer to Fig. 1, the bistable display 100 of present embodiment comprises display panel 110 and drive unit 120.Drive unit 120 comprises formation (queue) Q1, formation Q2 and controller 122.Controller 122 for example is time schedule controller (timing controller), to control the sequential of all input and output.Formation Q1, formation Q2 for example are configured in the controller 122, yet it should be noted, in other embodiments, formation Q1, formation Q2 are also configurable in other place of drive unit 120, might not be configured in the controller 122.In addition, the drive unit 120 of present embodiment also comprises formation Q3, though wherein the number of formation is three, yet the present invention is not limited to this.
In addition, drive unit 120 also comprises storer 124 and question blank (look up table) 126.Storer 124 couples controller 122, and comprises current news frame impact damper (current framebuffer) CF and previous news frame impact damper (previous frame buffer) PF.Wherein current news frame impact damper CF is used for the temporary current news block diagram picture that will show, is used for the temporary image that is presented at display panel 110 fully and before interrogated frame impact damper PF.In addition, 126 of question blanks are used for writing down all possible drive waveforms, and wherein drive waveforms is sent to display panel 110 with driving display panel 110 through display interface 150, and then make display panel 110 show corresponding news block diagram picture.Furthermore, question blank 126 for example recording binary 00 or 11 represent the data of drive waveforms of data and 10 representative-15V of drive waveforms of data, the 01 representative+15V of the drive waveforms of 0V.
Fig. 2 A and Fig. 2 B are the drive waveforms of drive unit 120 among the embodiment.Its CTC's frame cycle T 1 is represented the execution time (being about 20 milliseconds) of news frames (frame), and cycle T 0 is the integral multiple (being about 260 milliseconds) of news frame cycle T 1, that is T0=nT1, and n is a positive integer.In the present embodiment, the mixing of the display panel 110 of bistable display 100 through black particles and white particles (not drawing) to be producing different GTGs, and then reach the effect that shows a news block diagram picture.Wherein cycle T 0 representative news block diagram picture shows on display panel 110 and reaches the required elapsed time of steady state (SS).Because the distribution of black particles and white particles is controlled by the polarity and the size of voltage; And these particles must could arrive suitable position to demonstrate predetermined GTG effect via a period of time, just can reach steady state (SS) so the news block diagram picture that display panel 110 is shown need pass through cycle T 0.
Shown in Fig. 2 A and Fig. 2 B, the drive waveforms of present embodiment has positive voltage, ground voltage and three kinds of different potential of negative voltage, it respectively for example is+15V, 0V and-15V.In addition, the black particles of display panel 110 and white particles for example are respectively positively charged and electronegative particle.Please with reference to Fig. 2 A, when display panel 110 will show black picture, drive unit 120 just can export+drive waveforms of 15V, the black particles of positively charged is pushed to the top of display panel 110, so that display panel 110 shows black picture.Yet; As aforementioned; Because black particles and white particles move and need some times, that is when news frame cycle T 1, the beholder only can see light gray; So drive unit 120 must continue the drive waveforms of output+15V in cycle T 0, just can make black particles and white particles arrive suitable position to show black picture.In other words, in the present embodiment, each news block diagram picture must could arrive steady state (SS) to show predetermined GTG effect through cycle T 0 at least.On the other hand, shown in Fig. 2 B, when display panel 110 will show white picture,, electronegative white particles is pushed to the top of display panel 110, so that display panel 110 shows white picture just drive unit 120 can be exported-drive waveforms of 15V.Likewise, drive unit 120 also must continue the drive waveforms of output-15V in cycle T 0, just can make black particles and white particles arrive suitable position to show white picture.
In addition, Fig. 2 C is the enlarged diagram of the news frame cycle T 1 of Fig. 2 A.Shown in Fig. 2 C, news frame cycle T 1 is equivalent to vertical-scan period Tv, that is a vertical-scan period Tv just equals the news frame cycle T 1 that controller 122 is carried out a news block diagram picture.In detail, vertical-scan period Tv comprises vertical display cycle Tvd and vertical non-display cycle Tvb.Wherein vertical display cycle Tvd comprises a plurality of horizontal scanning period Th again, and horizontal scanning period Th comprises level display cycle Thd and the non-display cycle Thb of level.
Fig. 3 is the process flow diagram of the driving method of one embodiment of the invention.Please be simultaneously with reference to Fig. 1 and Fig. 3, the driving method of present embodiment is carried out by drive unit 120.The area data D1 that its middle controller 122 will receive in regular turn is stored in formation Q1 and formation Q2 (corresponding step S110) respectively in regular turn with area data D2.In the present embodiment; For example be CPU (the computer processing unit of Fig. 1; CPU) 130 transmit area image Ai as shown in Figure 4 through HPI (host interface) 140 data give drive unit 120; Wherein above-mentioned data for example are the form of image A i, and the form of image A i comprise at least origin coordinates (Xi, Yi), one of picture traverse W, image length L and image picture element.
Then, the controller 122 of Fig. 1 area data D1 that can calculate in regular turn in the formation Q1 distinguishes corresponding area image (corresponding step S120) with the interior area data D2 of formation Q2.Then; Controller 122 can make display panel 110 begin to show the area image of corresponding region data D1 in the news frame cycle T 1 (being presented at Fig. 2 A) of cycle T 0, and makes display panel 110 begin to show the area image of corresponding region data D2 in the next one news frame cycle T 1 of cycle T 0.That is, when display panel 110 does not reach steady state (SS) as yet at first area image, just can begin to show second area image.Wherein when the time is passed through cycle T 0; The area image of corresponding region data D1 can be in steady state (SS) on display panel 110; And when the time is passed through the summation of cycle T 0 and news frame cycle T 1 ((T0+T1)), the area image of corresponding region data D2 is in steady state (SS) (corresponding step S130) on display panel 110.In addition, in the process of execution in step S130, controller 120 also can be temporarily stored in the area image of corresponding region data D1 earlier in events buffer (event buffer) EF of storer 124, is sent to current news frame impact damper CF afterwards again.Above content is the general introduction of the driving method of present embodiment, and about the driving method of present embodiment will detail as after.
Fig. 5 is the detail flowchart of the driving method of Fig. 3, and Fig. 6 A to Fig. 6 G is the time dependent synoptic diagram of display panel.Furthermore; The display panel 110 of Fig. 6 A～Fig. 6 G displayed map 1, current news frame impact damper CF, before interrogated frame impact damper PF and events buffer EF process over time, wherein the events buffer EF of present embodiment is incident news frame impact damper (eventframe buffer) EF '.In other words, the events buffer EF of present embodiment can store the size of a news block diagram picture.Shown in Fig. 6 A; Suppose display panel 110, current news frame impact damper CF, before interrogate frame impact damper PF and incident news frame impact damper EF ' and all be in idle state at the beginning; When will making display panel 110, CPU 130 shows that continuously three area image A1～A3 are (when being presented at Fig. 6 E～6G); The first transit area data D1 of CPU 130 meetings gives the controller 122 (corresponding step S200) of Fig. 1; Wherein area data D1 comprise the image origination coordinate (X1, Y1), picture traverse W and image length L.
Please with reference to Fig. 1 and Fig. 6 A～6B, then controller 122 can judge whether whole formation Q1～Q3 is in busy condition (corresponding step S210).When formation Q1～Q3 arbitrary is in idle state (for example formation Q1), controller 122 can use formation Q1 come staging area data D1.Then, controller 122 can be according to the corresponding address of data D1, area data D1 zoning obtaining area image A1, and then be stored into incident to picture element of area image A1 interrogate frame impact damper EF ' (corresponding step S220 and Fig. 6 B) to a picture element.
Then, controller 122 can copy to current news frame impact damper CF to area image A1 from incident news frame impact damper EF ' at vertical non-display cycle Tvb (being presented at Fig. 2 C), to form the news block diagram as F1 (corresponding step S230 and Fig. 6 C).Simultaneously; Corresponding news block diagrams also pick up counting as the news frame timer (frame counter) (not drawing) of F1 in the controller 122, and vertical show the level in the time T vd show in the more current news frame of the time T hd impact damper CF the news block diagram as F1 with before interrogated frame impact damper PF in previous news block diagram as F0 (corresponding step S240).When the news block diagram as F1 and previous news block diagram as F0 when identical picture element is corresponding identical data value, controller 122 meetings are exported comparative result S1 to display panel 110, wherein comparative result for example is the drive waveforms of the 0V of Fig. 2 A.In addition; When the news block diagram as F1 with before interrogated block diagram as F0 when identical picture element is corresponding different data value; Controller 122 can be according to question blank 126 output comparative result S2 corresponding picture element to the display panel 110, and wherein comparative result S2 for example is the drive waveforms of the 15V of Fig. 2 A.Come, display panel 110 can begin viewing area image A 1 at news frame cycle T 1 (about 20 milliseconds) again.Shown in Fig. 6 C, after through a news frame cycle T 1, the observer can see ash gray area image A1 at display panel 110.In addition, news frame timer also can add the T1 time (corresponding step S250).
On the other hand, controller 122 also can be at any time execution in step S210～S220 synchronously, so that second area image A2 handled.That is; When formation Q1～Q3 arbitrary is in idle state (for example formation Q2); Controller 122 just is stored in formation Q2 with second area data D2 that receives; And zoning data D2 The corresponding area image A 2, to interrogate frame impact damper EF ' (corresponding step S220 and Fig. 6 C) according to area image A2 update event, it for example is that area image A2 is copied within the incident news frame impact damper EF '.Furthermore, controller 122 according to the starting point coordinate of area data D2 (X2, Y2), picture traverse W and image length L come zoning image A 2.That is, utilize image A 2 corresponding addresses, area data D2 zoning, and follow the incident that the is stored into news frame impact damper EF ' of a picture element to picture element of area image A2.From the above, at some constantly, though step S220 different with the handled object of step S230 (for example distinguishing processing region image A 2 and area image A1), the time of carrying out has the overlapping of part, so can save the treatment of picture time.
Then, controller 122 can be directed against area image A2 repeating step S230 and S240 again.In step S230, controller 122 copies to the current news frame impact damper CF of Fig. 6 D with the area image A2 of Fig. 6 C, and to form the news block diagram as F2, its CTC's block diagram comprises area image A1 and area image A2 as F2.In detail, controller 122 can copy to current news frame impact damper CF to area image A2 from incident news frame impact damper EF ' at vertical non-display cycle Tvb (being presented at Fig. 2 C), to form the news block diagram as F2.Controller 122 interior corresponding news block diagrams also can pick up counting as the news frame timer of F2 simultaneously.Afterwards, in step S240, controller 122 can show that vertically the next level in the time T vd shows time T hd, and the news block diagram of comparing current news frame impact damper CF is as F2 and previous all images picture element of interrogating the previous news block diagram of frame impact damper PF as F0.If corresponding picture element is identical data value, then keep corresponding show image constant (that is the drive waveforms that passes 0V arrives display panel 110).If the data value of corresponding picture element is inequality, then utilize question blank 126 to be sent to display panel 110 to the drive waveforms of corresponding address (for example+15V drive waveforms).In the present embodiment; Because the news block diagram is not quite similar as F0 with previous previous news block diagram of interrogating in the frame impact damper PF as F2; So controller 122 can be at correspondence position output comparative result S3 to display panel 110, so that display panel 110 is in next one news frame cycle T 1 beginning viewing area image A 2 (corresponding diagram 6D).In addition, news frame timer also can add the T1 time (corresponding step S250).Because area image A1 this moment has continued to be shown two news frame cycle T 1, so the color of area image A1 can be come deeply than area image A2.Likewise, controller 122 also can be at any time synchronously execution in step S210 to S210, to handle the 3rd area image A3.That is; When formation Q1～Q3 arbitrary is in idle state (for example formation Q3); Controller 122 just is stored in formation Q3 with the 3rd area data D3 that receives; And zoning data D3 The corresponding area image A 3, with according to area image A3 update event impact damper EF (corresponding step S220 and Fig. 6 D).Furthermore, controller 122 according to the starting point coordinate of area data D3 (X3, Y3), picture traverse W and image length L come zoning image A 3.From the above, at some constantly, though step S220 different with the handled object of step S230 (for example being respectively area image A3 and area image A2), the time of carrying out has the overlapping of part, so can save the treatment of picture time.
Then, controller 122 can copy to current news frame impact damper CF to area image A3 from incident news frame impact damper EF ' at vertical non-display cycle Tvb (being presented at Fig. 2 C), to form the news block diagram as F3 (corresponding step S230 and Fig. 6 E).Simultaneously; Correspondences news block diagram in the controller 122 can pick up counting as the news frame timer of F3, and vertical show the level in the time T vd show in the more current news frame of the time T hd impact damper CF the news block diagram as F3 with before interrogated frame impact damper PF in previous news block diagram as F0 (corresponding step S240 and Fig. 6 E).Because the news block diagram was not quite similar as F0 with previous news block diagram as F3, so controller 122 can be exported comparative result S4 corresponding picture element to the display panel 110 according to question blank 126, so that display panel 110 beginning viewing area image A3.Because area image A1 this moment has continued to show three news frame cycle T 1, and area image A2 continued to show two news frame cycle T 1, thus the degree of depth of area image A3 less than the degree of depth of area image A2, and the degree of depth of area image A2 can be less than area image A1.
Then, shown in Fig. 6 E, pass through time of (T0-2*T1) approximately again after (that is passed through time T0 (about 260 millisecond) from Fig. 6 A～Fig. 6 E), the observer can see the area image A1 of black and the area image A2 and the ash gray area image A3 of Dark grey.In other words, after time process cycle T 0, area image A1 presents steady state (SS) on display panel 110.Because the time that corresponding news block diagram is write down as the news frame timer of F1 equals the time of cycle T 0, that is area image A1 continued display cycle T0, so controller 122 meeting execution in step S270.Shown in Fig. 6 E, in step S270, controller 122 can copy to previous news frame impact damper PF to the area image A1 of black from current news frame impact damper CF at vertical non-demonstration time T vb.Then, controller 122 again execution in step S280 let formation Q1 idle (free) and remove corresponding news block diagram news frame timer as F1.From the above, before execution in step S270, controller 122 can judge earlier whether corresponding news block diagram equals cycle T 0 as the time that the news frame timer of F1 is write down, and whether the execution of deciding step S270 and S280 again.
Similarly; After vertical demonstration time T vd in horizontal scanning show time T hd; Controller 122 can be compared current news frame impact damper CF and the interior all image picture elements of previous news frame impact damper PF again; If corresponding picture element is identical data value, then keep corresponding show image constant (that is the drive waveforms that passes 0V arrives display panel 110).If the data value of corresponding picture element is inequality, then utilize question blank 126 to be sent to display panel 110 to the drive waveforms of corresponding address (for example+15V drive waveforms).Shown in Fig. 6 F, approximately again through the time of a news frame cycle T 1, the observer can see the area image A1 of black, the area image A2 of black and the area image A3 of Dark grey in cycle T 0 back.In other words, when time during through the summation of cycle T 0 and news frame cycle T 1 ((T0+T1)), time is up reaches cycle T 0 owing to the demonstration of area image A2, so area image A2 is in steady state (SS) on display panel 110.
Then, controller 122 can copy to previous news frame impact damper PF (corresponding step S270) to the area image A2 of black from current news frame impact damper CF at vertical non-demonstration time T vb.Because the time that this moment, image A 2 news frame timer in corresponding region was write down also equals cycle T 0, so controller 122 is can formation Q2 idle and remove the news frame timer (corresponding step S280) of correspondence.
By that analogy, after vertical demonstration time T vd in level show time T hd, controller 122 can the current news frame impact damper CF of comparison with previous news frame impact damper PF in all image picture elements.If corresponding picture element is identical data value, then keep corresponding show image constant (that is the drive waveforms that passes 0V arrives display panel 110).If the data value of corresponding picture element is inequality, then utilize question blank 126 to be sent to display panel 110 to the drive waveforms of corresponding address (for example+15V drive waveforms).Shown in Fig. 6 G, through the time of another news frame cycle T 1, the observer can see the area image A1 of black, the area image A2 of black and the area image A3 of black approximately again.In other words, when the time through cycle T 0 during with two news frame cycle T 1 ((T0+2*T1)), time is up reaches cycle T 0 owing to the demonstration of area image A3, so area image A3 is in steady state (SS) on display panel 110.
Then, controller 122 can copy to previous news frame impact damper PF (corresponding step S270) to the area image A3 of black from current news frame impact damper CF at vertical non-demonstration time T vb.Because the time that this moment, image A 3 news frame timer in corresponding region was write down also equals cycle T 0, so controller 122 is can formation Q3 idle and remove the news frame timer (corresponding step S280) of correspondence.
From the above; Because the drive unit of this instance 120 adopts formation Q1～Q3 to store continuous area data D1～D3 and utilizes the method for ordering buffering (pipeline) to drive display panel 110, so area image A1～A3 that the time that display panel 110 only needs to spend (T0+2*T1) just can three black of complete continuous demonstration (that is is in the area image A1 of steady state (SS)～A3).Just will spend one-period T0 compared to area image of known every demonstration, and show that continuously three area images just will spend the bistable display of three times of times, the drive unit 120 of present embodiment can shorten the demonstration time of bistable display 100.
Fig. 7 is another detail flowchart of the driving method of Fig. 3, and Fig. 8 A to Fig. 8 G is the synoptic diagram of the driving method of Fig. 7.Fig. 7 and Fig. 5 are similar, and just the two main difference is: the events buffer EF of Fig. 8 A to Fig. 8 F is incident partial buffer device (event partial buffer) EF ", so in the step S320 of Fig. 7, controller 122 is update event partial buffer device EF ".In detail, incident partial buffer device EF " the storage area come for a short time than incident news frame impact damper EF ', story part partial buffer device EF " only can storage compartment the news block diagram as F1～F3, area image A1～A3 of Fig. 8 B to Fig. 8 C for example.In other words, every through a news frame cycle T 1 in the present embodiment, all want partly impact damper EF of update event ".
In detail, shown in Fig. 8 B and Fig. 8 C, when the step S320 of controller 122 execution graphs 7, controller 122 is understood deletion event partial buffer device EF " in area image A1, again area image A2 is stored in incident partial buffer device EF " in.Perhaps, shown in Fig. 8 C and Fig. 8 D, controller 122 can deletion event partial buffer device EF " in area image A2, again area image A3 is stored in incident partial buffer device EF " in.Because the driving method of Fig. 7 and Fig. 8 A～Fig. 8 G can be by the enough indications of relevant narration acquisition of Fig. 5 and Fig. 6 A～Fig. 6 G, do not give unnecessary details so do not add at this.
Similarly; In the present embodiment; Because display panel 110 is only showing that first area image A1 need pass through 0 time of cycle T (about 260 milliseconds) and just can reach steady state (SS); News frame cycle T 1 (about 20 milliseconds) just can reach steady state (SS) and only need at interval in the demonstration that shows second area image A2 again; And the demonstration of the 3rd area image A3 also as long as also can reach steady state (SS) through a news frame cycle T 1 again, therefore can be shortened the demonstration time of a plurality of area image A1～A3 effectively.For instance, in the present embodiment, the time that only needs (T0+2*T1) just can steady display area image A1～A3, and its time compared to known needs (3*T0) will reduce many.
In sum; In an embodiment of the present invention; By storing continuous area data with formation and utilizing the method for ordering buffering to drive display panel; So can make display panel when first area image does not reach steady state (SS) as yet, just can begin to show the second area image, and then can shorten the whole updating time of display frame.
Though the present invention discloses as above with embodiment, so it is not in order to limiting the present invention, any under those skilled in the art, when can doing a little change and retouching, and do not break away from the spirit and scope of the present invention.
Claims (24)
1. a driving method is suitable for a bistable state display, and this bistable display comprises a display panel, and this driving method comprises:
The first area data and the second area data that receive in regular turn are stored in one first formation and one second formation respectively in regular turn;
Calculate a pairing first area image of these first area data and this second area data and a second area image in regular turn; And
The one first news frame cycle in a period 1 makes this display panel begin to show this first area image; And the frame cycle make this display panel begin to show this second area image in one second news of this period 1; Wherein when the time is passed through this period 1; This first area image is in a steady state (SS) on this display panel, and when the time was passed through the summation in this period 1 and this second news frame cycle, this second area image was in a steady state (SS) on this display panel.
2. driving method according to claim 1 wherein makes this display panel begin to show that the step of this first area image comprises in this first news frame cycle of this period 1:
With this first area image storage in an events buffer;
With the current news frame of this first area copying image to one impact damper, to form one first news block diagram picture; And
Relatively this first news block diagram picture and one had before been interrogated the block diagram picture, so that this display panel begins to show this first area image according to one first comparative result in this first news frame cycle.
3. driving method according to claim 2 wherein makes this display panel begin to show that the step of this second area image comprises in this second news frame cycle of this period 1:
According to this this events buffer of second area image update;
To this current news frame impact damper, to form one second news block diagram picture, wherein this second news block diagram looks like to comprise this first area image and this second area image with this second area copying image; And
Relatively this second news block diagram picture with should previous news block diagram picture so that this display panel begins to show this second area image according to one second comparative result in this second news frame cycle.
4. driving method according to claim 3, wherein the step according to this this events buffer of second area image update comprises: with this second area image storage in this events buffer.
5. driving method according to claim 4, wherein the step according to this this events buffer of second area image update also comprises: delete this first area image in this events buffer.
6. driving method according to claim 3 wherein should look like to be stored in a previous news frame impact damper by previous news block diagram.
7. driving method according to claim 6 also comprises:
When the time when this period 1, with this first area copying image to should previous news frame impact damper should previous news frame impact damper to upgrade; And
When time during through the summation in this period 1 and this second news frame cycle, with this second area copying image to should should before interrogating the frame impact damper to upgrade by previous news frame impact damper.
8. driving method according to claim 2 is wherein worked as this first news block diagram picture and should before be interrogated the block diagram picture not simultaneously, according to this first comparative result of question blank output.
9. driving method according to claim 1 also comprises this first formation is set at an idle state.
10. driving method according to claim 1, wherein this this period 1 is the integral multiple in this first news frame cycle.
11. driving method according to claim 1, wherein these first area data comprise one of starting point coordinate, picture traverse, image length and image picture element of this first area image at least.
12. a drive unit is suitable for a bistable state display, this bistable display comprises a display panel, and this drive unit comprises:
One first formation;
One second formation; And
One controller; The first area data and the second area data that receive in regular turn are stored in this first formation and this second formation respectively in regular turn; And calculate these first area data and a pairing first area image of this second area data and a second area image in regular turn; This controller makes this display panel begin to show this first area image in the one first news frame cycle of a period 1; And make this display panel begin to show this second area image in the one second news frame cycle of this period 1, wherein when the time was passed through this period 1, this first area image was in a steady state (SS) on this display panel; And when the time was passed through the summation in this period 1 and this second news frame cycle, this second area image was in a steady state (SS) on this display panel.
13. drive unit according to claim 12 wherein also comprises a storer, couples this controller, this storer comprises:
One events buffer stores this first area image; And
One current news frame impact damper; Wherein this controller arrives this current news frame impact damper with this first area copying image; To form one first news block diagram picture; And this controller is this first a news block diagram picture and a previous news block diagram picture relatively, so that this display panel begins to show this first area image according to one first comparative result in this first news frame cycle.
14. drive unit according to claim 13; Wherein this controller is also according to this this events buffer of second area image update; And with this second area copying image to this current news frame impact damper; To form one second news block diagram picture; Wherein this second news block diagram looks like to comprise this first area image and this second area image, this controller relatively this second news block diagram picture with should previous news block diagram picture so that this display panel second is interrogated frame cycle and is begun to show this second area image at this according to one second comparative result.
15. drive unit according to claim 14, wherein this controller also with this second area image storage in this events buffer.
16. drive unit according to claim 15, wherein this controller is also deleted this first area image in this events buffer.
17. drive unit according to claim 14, wherein this storer also comprises a previous news frame impact damper, and should look like to be stored among this previous news frame impact damper by previous news block diagram.
18. drive unit according to claim 17; Wherein when the time is passed through this period 1; This controller should previous be interrogated frame impact damper to should before interrogating the frame impact damper to upgrade with this first area copying image; And when time during through the summation in this period 1 and this second news frame cycle, this controller with this second area copying image to should should before interrogating the frame impact damper to upgrade by previous news frame impact damper.
19. drive unit according to claim 13 also comprises a question blank, when this first news block diagram picture with should previous news block diagram picture not simultaneously, this controller is according to this this first comparative result of question blank output.
20. drive unit according to claim 12, wherein this controller also is set at an idle state with this first formation.
21. drive unit according to claim 12, wherein these first area data comprise one of starting point coordinate, picture traverse, image length and image picture element of this first area image at least.
22. drive unit according to claim 12 wherein should be the integral multiple in this first news frame cycle the period 1.
23. according to claim 22 a described drive unit, wherein this bistable display is an electric paper display.
24. the bistable display of a configuration drive unit according to claim 12.
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| CN201110051080XA CN102651199A (en) | 2011-02-25 | 2011-02-25 | Bistable display and drive method and drive device of bistable display |
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| CN201110051080XA CN102651199A (en) | 2011-02-25 | 2011-02-25 | Bistable display and drive method and drive device of bistable display |
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Application publication date: 20120829 |