CN100578584C - Driving mechanism for plasma display panel and driving method thereof - Google Patents
Driving mechanism for plasma display panel and driving method thereof Download PDFInfo
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- CN100578584C CN100578584C CN 200610105718 CN200610105718A CN100578584C CN 100578584 C CN100578584 C CN 100578584C CN 200610105718 CN200610105718 CN 200610105718 CN 200610105718 A CN200610105718 A CN 200610105718A CN 100578584 C CN100578584 C CN 100578584C
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Abstract
The invention discloses a plasma display panel drive device, which comprises a gray scale configuration unit, a static menu check unit and gray scale configuration controller. The gray scale configuration unit receives and configures image data; the static menu check unit checks whether the image data is static menu or not; the gray scale configuration controller is connected electrically to the static menu check unit and the gray scale configuration unit; the gray scale configuration unit outputs image data with different gray scales according to the non-static or static menu. The invention comprises: configure image data according to different gray scale configuration rules; output image data with different gray scale configurations by checking whether the image data has static menu or not.
Description
Technical field
The present invention is relevant for a kind of Drive And Its Driving Method of panel, and is particularly to a kind of Drive And Its Driving Method of Plasmia indicating panel.
Background technology
The principle of luminosity of existing plasma display is for by electrode application voltage, makes gas send fluorescent agent on the ultraviolet ray excited dividing wall, and emits the cognizable visible light of human eye.The gas luminescence process is mainly controlled by three kinds of electrodes, is respectively to keep electrode, scan electrode, addressing-electrode.Scan electrode and addressing-electrode produce the wall electric charge, and again by scan electrode with to keep electrode lasting luminous with the form energizing gas that exchanges.
Fig. 1 is the synoptic diagram that existing plasma display produces GTG brightness.Plasma display is luminous to be divided into three cycles, is respectively reset cycle (showing with upper left skew lines tabulation to the bottom right), addressing cycle (representing to one of bottom right skew lines with upper left), keeps the cycle (showing with upper right skew lines tabulation to the lower-left).At first, reset cycle is done a comprehensive state renewal with the wall electric charge.Then, each addressing-electrode that is connected to data line determines whether produce wall electric charge (being so-called addressing) with each scan electrode in corresponding inferior pixel (sub pixel) in regular turn in the addressing cycle.The cycle of keeping then is a scan electrode and keep electrode and apply alternating voltage, makes that addressed person is able to luminous in each time pixel.In order to show the GTG of different brightness, in general be divided into during the frame (frame) a plurality of subdomains (subfield) SF0, SF1 ..., SF8 (each subdomain has long the keeping the cycle of different time), then by the addressing state that determines each time pixel respectively in each subdomain SF0～SF8 (promptly whether decision is luminous during corresponding subdomain), and make each time pixel present different GTGs.The cycle of keeping that can obviously find out each subdomain SF0～SF8 by Fig. 1 is difference to some extent, is equivalent to give respectively the luminous weighted value of nine subdomains 1,1,2,4,8,16,32,64,128.
For example ought desire to make certain pixel to show GTG 127, then can be in subdomain SF1～SF7 this time of addressing pixel and luminous, and in subdomain SF0, SF8, do not want this time of addressing pixel (thereby not luminous), so the mean flow rate of this time pixel in an image duration is GTG 127.The luminous weighted value of this time pixel is 0+1+2+4+8+16+32+64+0=127 with the mathematical way totalling.If desire shows GTG 128, then can make this time pixel not luminous and present in subdomain SF8 is luminous in subdomain SF0～SF7, also be its luminous weighted value 0+0+0+0+0+0+0+0+128=128.But the method can be because dynamic quasi profile phenomenon appears in the concentrated meeting of human vision center of gravity when handling non-static image.When viewing and admiring non-static image, for example when when brightness 128 moves to brightness 127, this time pixel is in all non-luminous illusion of subdomain SF0～SF8.The situation of dynamic quasi profile also can occur in other brightness, have the influence of certain degree for the demonstration of non-static image.For instance, at the picture that shows that people's face moves, can make flaws such as occurring black line on the cheek.
Fig. 2 is for solving the display frame figure of dynamic quasi profile.When handling non-tableaux, represent with two kinds of different GTG configuration rule A, B, in Fig. 2, show the frame that uses GTG configuration rule A and GTG configuration rule B configuration.GTG configuration rule A, B have different subdomains respectively in same brightness and distribute.For instance, when desiring to make certain pixel show GTG 32, then GTG configuration rule A can make this time pixel luminous in subdomain SF6 (being luminous weighted value 0+0+0+0+0+0+32+0+0=32), and GTG configuration rule B then can make this time pixel luminous in subdomain SF0～SF5 (being luminous weighted value 1+1+2+4+8+16+0+0+0=32).In any case GTG configuration rule A, B all can make this time pixel demonstrate GTG 32.
This display frame uses AB phase (phase) algorithm, frame is disposed with multiple interlace mode with GTG configuration rule A and GTG configuration rule B with space and time, and reaches the effect that the vision center of gravity is evenly distributed.Distribution in time, with first row, first row of frame T201 are respectively B, A, B, A, B, A, B, A, B, A from left to right, and first row of next frame T202 are respectively A, B, A, B, A, B, A, B, A, B from left to right.Next, first of the next frame T203 row are respectively B, A, B, A, B, A, B, A, B, A from left to right again, and next frame T204 first row are respectively A, B, A, B, A, B, A, B, A, B from left to right again.The time of can obviously seeing is distributed staggered result.
But distribution reference frame T204 spatially is listed as to secondary series with first of frame T204, and first row are A, B, A, B, A, B, A, B, A from left to right, and B, secondary series are respectively B, A, B, A, B, A, B, A, B, A from left to right.Can obviously see the result that allocation of space is staggered.This practice is because of disperseing human vision center of gravity, so can improve dynamic quasi profile phenomenon.But when showing the tableaux of low GTG brightness,, make under some brightness, have and light one at necessary interval of time for twice more than the frame because two kinds of different GTG brightness are switched.According to the characteristics of luminescence of plasma display, same pixel compartments (cell) was lighted at a distance of of a specified duration more being not easy more twice time of lighting, and therefore can cause a problem of putting out.Because plasma display must have the function that can show non-static state and tableaux concurrently, therefore need a kind of method, all can possess good display effect for non-tableaux and tableaux.
Summary of the invention
Purpose of the present invention just provides a kind of drive unit of Plasmia indicating panel, not only can prevent the appearance of dynamic quasi profile at the non-tableaux of Plasmia indicating panel, and especially the tableaux at Plasmia indicating panel can prevent to put out a problem.
A further object of the present invention provides a kind of driving method of Plasmia indicating panel, makes plasma display frame under non-tableaux and tableaux, can prevent the dynamic quasi profile and put out a problem.
Based on above-mentioned and other purpose, the present invention proposes a kind of drive unit of Plasmia indicating panel, comprises that GTG dispensing unit, tableaux detect unit and GTG Configuration Control Unit.The GTG dispensing unit receives image data, and according to different GTG configuration rules image data is converted to the first subdomain data and the second subdomain data at least, but the subdomain data of conversion can not be limited to two kinds.Tableaux detects the unit in order to detect whether image data is tableaux.The GTG Configuration Control Unit is electrically connected to tableaux and detects unit and GTG dispensing unit, in order to the configuration mode of control image gray scale.When image data was non-tableaux, the GTG Configuration Control Unit was controlled the different sequential of GTG dispensing unit according to diverse location with the frame in frame space, and alternately exports the first subdomain data and the second subdomain data.When image data was tableaux, the GTG Configuration Control Unit was then controlled the GTG dispensing unit and is only alternately exported the first subdomain data and the second subdomain data according to the diverse location in frame space.
Described according to preferred embodiment of the present invention, above-mentioned plasma display panel drive device also comprises data sorting unit and data driver.The data sorting unit is electrically connected to the GTG dispensing unit, in order to the order according to a plurality of different subdomains, and the subdomain data that the GTG dispensing unit is exported are sorted and exports.Data driver is electrically connected to the data sorting unit, drives Plasmia indicating panel in order to the output of foundation data sorting unit.
From another viewpoint, the present invention proposes a kind of driving method of Plasmia indicating panel, in order to the subdomain data to be provided so that drive Plasmia indicating panel, comprise the steps: the at first different GTG configuration rules of foundation, image data is converted to the first subdomain data and the second subdomain data at least.Whether then, detect image data is tableaux.When image data was non-tableaux, then the diverse location along with the frame space alternately provided the first subdomain data and the second subdomain data with the different sequential of frame, drives Plasmia indicating panel according to this.When image data was tableaux, then a diverse location along with the frame space alternately provided the first subdomain data and the second subdomain data, drives Plasmia indicating panel according to this.
The present invention is because of adopting the structure that non-tableaux and tableaux are driven by different way, so can prevent the appearance of dynamic quasi profile at the non-tableaux of Plasmia indicating panel, and also can prevent to put out a problem at the tableaux of Plasmia indicating panel.
State with other purposes, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 is that existing plasma display produces the synoptic diagram of GTG brightness.
Fig. 2 is the display frame figure that solves the dynamic quasi profile.
Fig. 3 is the circuit block diagram of embodiment of the invention plasma display panel drive device.
Fig. 4 A is the sequential chart that embodiment of the invention plasma display panel drive device shows non-tableaux.
Fig. 4 B is the sequential chart that embodiment of the invention plasma display panel drive device shows tableaux.
Fig. 5 is the embodiment circuit block diagram that Fig. 3 tableaux detects unit 32.
Fig. 6 is cut apart figure by the frame of image data judgement tableaux.
Fig. 7 is the embodiment process flow diagram that the Plasmia indicating panel driving method is described according to the present invention.
Fig. 8 is according to the embodiment process flow diagram that detects image data (step S720) in the key diagram 7 of the present invention.
Embodiment
Fig. 3 is the circuit block diagram of embodiment of the invention plasma display panel drive device 300.This plasma display panel drive device 300 comprises that GTG dispensing unit 31, tableaux detect unit 32, GTG Configuration Control Unit 33, data sorting unit 34, data driver 35.GTG dispensing unit 31 receives image data, and according to GTG configuration rule A, B image data is converted to the first subdomain data and the second subdomain data.
In present embodiment, GTG dispensing unit 31 comprises the first GTG configurator 311, the second GTG configurator 312, selector switch 313.The first GTG configurator 311 converts the image data that is received to first subdomain data according to the first GTG configuration rule A, and the first GTG configuration rule A is A phase (phase) algorithm in present embodiment.The second GTG configurator 312 is converted to the second subdomain data according to the second GTG configuration rule B that is different from the first GTG configuration rule A with the image data that is received, and the second GTG configuration rule B is B phase (phase) algorithm in present embodiment.Selector switch 313 is electrically connected to the first GTG configurator 311, the second GTG configurator 312 and GTG Configuration Control Unit 33, selects to export the first subdomain data or the second subdomain data in order to the control of foundation GTG Configuration Control Unit 33.
Fig. 4 A is the sequential chart that the drive unit of embodiment of the invention Plasmia indicating panel shows non-tableaux.Please also refer to Fig. 4 A and Fig. 3, when tableaux detects unit 32 when judging that signal of video signal are non-tableaux, then 31 outputs of GTG dispensing unit are with the subdomain data of sequential and spatial variations.We can be divided into display panel A and the staggered block of B shown in Fig. 4 A.The subdomain data that block English alphabet A representative is produced according to the first GTG configuration rule A (being the Aphase algorithm).And the subdomain data that block English alphabet B representative is produced according to the second GTG configuration rule B (being B phase algorithm).Frame T401 is to the display frame of frame T404 when receiving non-tableaux.At first, first of the frame T401 row are configured to B, A, B, A, B, A, B, A, B, A.Then, first of the next frame T402 row are configured to A, B, A, B, A, B, A, B, A, B.First of the next frame T403 row are configured to B, A, B, A, B, A, B, A, B, A again, and next, first row of next frame T404 are configured to A, B, A, B, A, B, A, B, A, B.The subdomain data that can be learnt output by first row of frame T401～T404 are with the alternately output of frame sequential.All the other frames are according to timing variations can the rest may be inferred.First of frame T404 classifies A, B, A, B, A, B, A, B, A, B as, and frame T404 second classify B, A, B, A, B, A, B, A, B, A as.Can learn that the subdomain data of output export with the frame space-alternating.Rule can the rest may be inferred for each leu spatial variations of all the other of frame T401～T404.Because the subdomain data are with frame space and frame timing variations, so but balance vision center of gravity, and effectively reduce dynamic quasi profile phenomenon.
Fig. 4 B is the sequential chart that embodiment of the invention plasma display panel drive device shows tableaux.Please also refer to Fig. 4 B and Fig. 3, when tableaux detects unit 32 when judging that signal of video signal are tableaux, then 31 outputs of GTG dispensing unit are only with the subdomain data of spatial variations.Frame T411 is to the display frame of frame T414 when receiving tableaux.At first, first of frame T411 classify A, B, A, B, A, B, A, B, A, B as.And next frame T412 first classify A, B, A, B, A, B, A, B, A, B as.And first row of next frame T413 and next frame T414 again are all A, B, A, B, A, B, A, B, A, B, and other frames can the rest may be inferred.By Fig. 4 B as can be known, the subdomain data of output are not subjected to the influence of frame sequential.And with frame T414, first of frame T414 classifies A, B, A, B, A, B, A, B, A, B as, and second classifies B, A, B, A, B, A, B, A, B, A as, can learn that the subdomain data of output are exported with the frame space-alternating.Since when showing tableaux not the different sequential along with frame alternately change the GTG configuration mode, therefore can effectively reduce a problem of putting out that is taken place when showing tableaux
Fig. 5 is the embodiment circuit block diagram that the tableaux of Fig. 3 detects unit 32.Tableaux detects unit 32 and receives signal of video signal, and detects the back and the output tableaux detects signal via internals.Tableaux detects unit 32 and comprises frame GTG computing unit 52, register 53 and comparer 54.Frame GTG computing unit 52 is in order to calculate the image data of present frame, with the result of calculation of output present frame.In present embodiment, frame GTG computing unit 52 comprises cutter 521 and GTG totalizer 522, and cutter 521 is cut into a plurality of subregions in order to the image data with present frame.GTG totalizer 522 is electrically connected to cutter 521, in order to the GTG value of each pixel in each subregion that adds up respectively, adds the GTG result of calculation of total value as present frame with the GTG of exporting subregion.Register 53 is electrically connected to frame GTG computing unit 52, in order to the GTG result of calculation of storage present frame, and provides the GTG result of calculation of previous frame.Comparer 54 is electrically connected to frame GTG computing unit 52 and register 53, in order to the result of calculation of comparison present frame and the GTG result of calculation of previous frame, exports tableaux with the image data of decision present frame and detects signal.Comparer 54 also can receive a noise error tolerances as the reference of judging tableaux, and this image data because of input contains the noise composition, so need just to be judged as non-tableaux in the change value of input image data above a certain boundary line.
Fig. 6 is cut apart legend by the frame of image data judgement tableaux.Please also refer to Fig. 5 and Fig. 6, the shown frame of image data can be divided into 8 row, 4 row and become 8*4=32 block via dispenser 521.In 32 blocks, use GTG totalizer 522 that the GTG value of each block is added up respectively, then the GTG of each block is added total value (being GTG result of calculation) and deposit register 53 in.Simultaneously, comparer 54 with each block GTG of register 53 former frame of keeping in add total value respectively with present frame in corresponding block GTG add total value and compare, if when wherein the GTG of any block adds difference that the total value GTG block corresponding with former frame add total value and reaches predetermined critical (for example greater than 2%), then be judged as non-tableaux.Otherwise,, then be judged as tableaux if the GTG of each block adds that total difference is different all to be not more than at 2% o'clock between present frame and the former frame.Can adjust by the noise error tolerances with the measures of dispersion of former frame, the noise signal that image data is subjected to that transmission medium difference for example, external information source are disturbed to avoid, taken place during the conversion of interface disturbs.
Whether the plasma display panel drive device by present embodiment is tableaux according to image data, and exports different corresponding subdomain data, avoids the dynamic quasi profile and puts out a problem.Those of ordinary skills the invention is not restricted to export the subdomain data according to two subdomain configuration rules when knowing, can be two or more subdomain rules and export the subdomain data with different frame sequential and different frame locus.Moreover, cut apart frame and be not limited to be divided into 32 blocks, can optionally be divided into the block of any amount, also visual different images data of noise error tolerances and be adjusted to optimal display result.
Fig. 7 is the embodiment process flow diagram that the Plasmia indicating panel driving method is described according to the present invention.Please also refer to Fig. 3 and Fig. 7, to understand each step of present embodiment driving method.At first GTG dispensing unit 31 is converted to the first subdomain data and the second subdomain data (step S710) according to different configuration rules at least with image data.In present embodiment, step S710 makes the first GTG configurator 311 according to the first GTG configuration rule image data is converted to the first subdomain data, and makes the second GTG configurator 312 according to the second GTG configuration rule (being different from the first GTG configuration rule) image data is converted to the second subdomain data.
Next, tableaux detects unit 32 and detects image datas (step S720), and judges whether to be tableaux (step S730).When tableaux detects unit 32 when judging that image datas are non-tableaux, alternate selection provides the first subdomain data and the second subdomain data (step S750) to 31 control selector switchs 313 of GTG dispensing unit with the different sequential of frame along with the diverse location in frame space.When image data was tableaux, 313 diverse locations along with the frame space of 31 control selector switchs of GTG dispensing unit alternately provided the first subdomain data and the second subdomain data (step S740).
Then, data sorting unit 34 is according to the order of a plurality of different subdomains, and with subdomain data sorted (step S760).Data driver 35 drives Plasmia indicating panel (step S770) according to ordering subdomain data again.By the method for present embodiment, can be that tableaux or non-tableaux are exported different subdomain data according to image frame, make Plasmia indicating panel when image data displaying, can reach good display effect.
Fig. 8 is according to the embodiment process flow diagram that detects image data (step S720) in the key diagram 7 of the present invention.Please also refer to Fig. 5 and Fig. 8, frame GTG computing unit 52 calculates the image data of present frame, with the GTG result of calculation (step S810) of output present frame.In present embodiment, step S810 comprises as follows: cutter 521 is cut into a plurality of subregions with the image data of present frame, then, add up the respectively GTG value of each pixel in each subregion of GTG totalizer 522 adds the GTG result of calculation of total value as present frame with the GTG of output subregion.
Register 53 is stored the GTG result of calculation (step S820) of present frames and the GTG result of calculation (step S830) of previous frame is provided.Whether next comparer 54 compares the GTG result of calculation of present frame and the GTG result of calculation (step S840) of previous frame, be tableaux (step S850) with the image data that determines present frame.Those of ordinary skills are when knowing that the invention is not restricted to image data is converted to the first subdomain data and the second subdomain data, visual demand is converted to two or more subdomain data to reach better display effect.
In sum, Drive And Its Driving Method at Plasmia indicating panel of the present invention, owing to the form of taking to export different subdomain data according to static or non-tableaux, can avoid a problem of putting out of tableaux, more can separate the dynamic quasi profile problem of tableaux by no means.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those of ordinary skills, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when with being as the criterion that claim was defined.
Claims (10)
1. the drive unit of a Plasmia indicating panel comprises:
One GTG dispensing unit, it receives an image data, and according to different GTG configuration rules this image data is converted to one first subdomain data and one second subdomain data at least;
Whether one tableaux detects the unit, be tableaux in order to detect this image data; And
One GTG Configuration Control Unit, be electrically connected to this tableaux and detect unit and this GTG dispensing unit, in order to when this image data is non-tableaux, then control this GTG dispensing unit along with the diverse location in frame space is alternately exported these first subdomain data and this second subdomain data with the different sequential of frame, and when this image data is tableaux, then control this GTG dispensing unit only along with the diverse location in frame space is alternately exported these first subdomain data and this second subdomain data.
2. the drive unit of Plasmia indicating panel as claimed in claim 1 is characterized in that, this GTG dispensing unit comprises:
One first GTG configurator, it is converted to this first subdomain data according to one first GTG configuration rule with this image data that is received;
One second GTG configurator, it is converted to this second subdomain data according to the one second GTG configuration rule that is different from this first GTG configuration rule with this image data that is received; And
One selector switch is electrically connected to this first GTG configurator, this second GTG configurator and this GTG Configuration Control Unit, in order to select to export these first subdomain data or this second subdomain data according to the control of this GTG Configuration Control Unit.
3. the drive unit of Plasmia indicating panel as claimed in claim 1 is characterized in that, this tableaux detects the unit and comprises:
One frame GTG computing unit is in order to calculate this image data of present frame, with the GTG result of calculation of output present frame;
One register is electrically connected to this frame GTG computing unit, in order to the GTG result of calculation of storage present frame, and the GTG result of calculation that previous frame is provided; And
Whether one comparer is electrically connected to this frame GTG computing unit and this register, in order to the GTG result of calculation of comparison present frame and the GTG result of calculation of previous frame, be tableaux with this image data that determines present frame.
4. the drive unit of Plasmia indicating panel as claimed in claim 3 is characterized in that, this frame GTG computing unit comprises:
One cutter is cut into a plurality of subregions in order to this image data with present frame; And
One GTG totalizer is electrically connected to this cutter, and the GTG value in order to each pixel in each those subregion that add up respectively adds the GTG result of calculation of total value as present frame with the GTG of exporting those subregions.
5. the drive unit of Plasmia indicating panel as claimed in claim 1 is characterized in that, also comprises:
One data sorting unit is electrically connected to this GTG dispensing unit, in order to the order according to a plurality of different subdomains, and the subdomain data that this GTG dispensing unit is exported are sorted and exports; And
One data driver is electrically connected to this data sorting unit, in order to drive this plasma display panel according to the output of this data sorting unit.
6. the driving method of a Plasmia indicating panel, comprising so that drive this plasma display panel in order to the subdomain data to be provided:
According to different GTG configuration rules, an image data is converted to one first subdomain data and one second subdomain data at least;
Whether detect this image data is tableaux;
When this image data was non-tableaux, then the diverse location along with the frame space alternately provided these first subdomain data and this second subdomain data with the different sequential of frame, drives this plasma display panel according to this; And
When this image data was tableaux, then a diverse location along with the frame space alternately provided these first subdomain data and this second subdomain data, drives this plasma display panel according to this.
7. the driving method of Plasmia indicating panel as claimed in claim 6 is characterized in that, the step that this image data is converted at least these first subdomain data and these second subdomain data comprises:
According to one first GTG configuration rule, this image data is converted to this first subdomain data; And
One second GTG configuration rule according to being different from this first GTG configuration rule is converted to this second subdomain data with this image data.
8. the driving method of Plasmia indicating panel as claimed in claim 6 is characterized in that, the step that detects this image data and whether be tableaux comprises:
Calculate this image data of present frame, with the GTG result of calculation of output present frame;
The GTG result of calculation of storage present frame;
The GTG result of calculation of previous frame is provided; And
Relatively whether the GTG result of calculation of present frame and the GTG result of calculation of previous frame are tableaux with this image data that determines present frame.
9. the driving method of Plasmia indicating panel as claimed in claim 8 is characterized in that, the step of calculating this image data of present frame comprises:
This image data of present frame is cut into a plurality of subregions; And
The GTG value of each pixel in each those subregion of adding up respectively adds the GTG result of calculation of total value as present frame with the GTG of exporting those subregions.
10. the driving method of Plasmia indicating panel as claimed in claim 6, it is characterized in that, when this image data is non-tableaux, then the diverse location along with the frame space alternately provides these first subdomain data and this second subdomain data with the different sequential of frame, order according to a plurality of different subdomains, and the subdomain data are sorted, and drive this plasma display panel according to ordering subdomain data; And when this image data is tableaux, then a diverse location along with the frame space alternately provides these first subdomain data and this second subdomain data, order according to a plurality of different subdomains, and the subdomain data are sorted, and drive this plasma display panel according to ordering subdomain data.
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| CN104795037A (en) * | 2015-04-29 | 2015-07-22 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and driving method thereof |
| CN104821160B (en) * | 2015-05-12 | 2017-09-12 | 深圳市华星光电技术有限公司 | Method for controlling image to show |
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