CN103247268A - Method and device for blur elimination - Google Patents
Method and device for blur elimination Download PDFInfo
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- CN103247268A CN103247268A CN2013100722817A CN201310072281A CN103247268A CN 103247268 A CN103247268 A CN 103247268A CN 2013100722817 A CN2013100722817 A CN 2013100722817A CN 201310072281 A CN201310072281 A CN 201310072281A CN 103247268 A CN103247268 A CN 103247268A
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Abstract
The invention relates to the technical field of electronic communication, in particular to a method and a device for blur elimination. The method and the device are used for eliminating a blur in a display screen. The method comprises the following steps: determining peripheral pixels capable of generating the blur; and applying voltage to the peripheral pixels, wherein the voltage enables the peripheral pixels to be white or bottom-colored during displaying. When the method is used, voltage applied to charged particles corresponding to the peripheral pixels enables the peripheral pixels to be white, so that when voltage is applied to charged particles corresponding to data to be displayed, although a generated electric field can influence the charged particles corresponding to the peripheral pixels, generation of the blur caused by free movement of the charged particles corresponding to the peripheral pixels, which are influenced by the electric field, can be prevented as corresponding voltage is applied to the charged particles corresponding to the peripheral pixels.
Description
Technical field
The present invention relates to the communications electronics technical field, relate in particular to a kind of method and device of eliminating ghost.
Background technology
Along with development of science and technology electricity paper book has been deep in the daily life, electrophoretic display technology (EPD) display text corresponding contents commonly used in the electric paper book.The EPD screen is made up of a lot of tiny capsules, and each capsule comprises positively charged white charged particles and electronegative charged black particles, and charged black particles and white charged particles all are suspended in the clear liquid.When the negative pole electric field was set, white particle moved to the microcapsules top, reader visible white particle, surf zone display white herein.Simultaneously, when positive electric field was set, black particles moved to the microcapsules top, and reader's visible black color particle makes surf zone be shown as black.
All need the EPD screen is carried out refresh operation during the every demonstration one page of electricity paper book content, refresh mode commonly used at present is the DU pattern.The DU pattern when the gray scale of pixel changes, moves the corresponding charged particle of this pixel by applying voltage in refresh process, if the gray scale of pixel does not change, then do not move the corresponding charged particle of this pixel.But the user whenever turns over one page and can find the ghost that page up stays when making electricity consumption paper book carry out page turning to watch, and as shown in Figure 1, wherein the left side is depicted as the shown font of page up, and what the right side showed is the left ghost of page up.And this ghost will become more and more darker along with increasing of page turning number of times, if visible every page is all left such ghost and will extremely influence sense of experience of users.
Need use the GC16 pattern that screen is carried out refresh operation in order to eliminate above-mentioned ghost, but the shortcoming of GC16 pattern is length consuming time, and blank screen can appear one time in screen in refresh process, it is not fine that the user is experienced, so carry out the refresh operation of a GC16 pattern after the common page turning of electric paper book product 10 times again, to reach the effect of eliminating ghost and reducing the flicker number of times.But use and thisly refresh the mode user and watching 10 pages still can see the darker ghost of color time by time during with interior content, watching the 10th page the flicker of a blank screen also can occur later in order to eliminate ghost, therefore, the combination of DU pattern and GC16 pattern is a kind of mode of elimination ghost of the user's of sacrifice experience sense.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of eliminating ghost, is used for eliminating the problem that display device produces ghost.
A kind of method of eliminating ghost, described method comprises:
Determine to produce the neighboring pixel of ghost;
For described neighboring pixel applies voltage; Described voltage can make described neighboring pixel be shown as white or background color.
A kind of device of eliminating ghost, described device comprises:
First determining unit is used for definite neighboring pixel that can produce ghost;
Presser unit is used to described neighboring pixel to apply voltage; Described voltage can make described neighboring pixel be shown as white or background color.
When as seen using this method, the voltage that the corresponding charged particle of neighboring pixel is applied can make neighboring pixel be shown as white, like this when applying voltage for the corresponding charged particle of data to be displayed, even if the electric field that produces can have influence on the corresponding charged particle of neighboring pixel, but owing to also applied corresponding voltage for the corresponding charged particle of this neighboring pixel, therefore can prevent that the corresponding charged particle of neighboring pixel is arbitrarily mobile because being subjected to electric field effects, cause ghost to produce.
Description of drawings
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below.
Fig. 1 is the design sketch that produces ghost in this prior art;
A kind of method flow diagram of eliminating ghost that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is current screen displaying contents figure in the prior art;
Fig. 4 is that current screen shows ghost figure in this prior art;
A kind of method flow diagram of eliminating ghost that Fig. 5 provides for the embodiment of the invention one;
The apparatus structure synoptic diagram of the elimination ghost that Fig. 6 provides for the embodiment of the invention.
Embodiment
In order to make those skilled in the art person understand technical scheme in the embodiment of the invention better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing technical scheme among the present invention is described in further detail.
The present invention designs following concept:
Content-data for all the elements that the user sees at screen, namely one is put in order all the elements of shielding;
Content-data comprises data to be displayed and background color data; Wherein the main contents of data to be displayed for being used for conveying a message to the user can be literal, picture etc., and introducing the present invention for convenience is example with the literal; The background color data are transmitted information for being used for serving as background color and being not used in to the user, and the content that expresses thoughts can be the background content of picture, blank, white or other colors, and introducing the present invention for convenience is example with the white background.
When using the method that the embodiment of the invention provides, the voltage that the corresponding charged particle of neighboring pixel is applied can make neighboring pixel be shown as white, like this when applying voltage for the corresponding charged particle of data to be displayed, even if the electric field that produces can have influence on the corresponding charged particle of neighboring pixel, but owing to also applied corresponding voltage for the corresponding charged particle of this neighboring pixel, therefore can prevent that the corresponding charged particle of neighboring pixel is arbitrarily mobile because being subjected to electric field effects, cause ghost to produce.As shown in Figure 2, detailed process is as follows:
Step 21, definite neighboring pixel that can produce ghost;
Step 22 is for described neighboring pixel applies voltage; Described voltage can make described neighboring pixel be shown as white or background color.
Determine described in the concrete step 21 that the neighboring pixel that can produce ghost comprises:
Content-data comprises data to be displayed and background color data; When described content-data deposits storer in, to next-door neighbour's data to be displayed and for the pixel in the background color data identifies, will have the pixel of sign as described neighboring pixel.
Concrete, after the described neighboring pixel of determining to produce ghost and described apply voltage for described neighboring pixel before, further comprise:
In the look-up table that sets in advance, search and described neighboring pixel value corresponding; Determine and described numerical value corresponding voltage value; At this moment, describedly apply voltage and comprise for described neighboring pixel:
For described neighboring pixel applies the corresponding voltage of definite magnitude of voltage.
Below be introduced with specific embodiment:
If want to remove fully ghost, just must know the reason that produces ghost, to find to produce the reason of ghost as follows through scrutinizing the technician:
Introduce for convenience, show " king " word with current screen, next screen refreshes to the blank screen and is introduced for example.As shown in Figure 3 and Figure 4, wherein vertical numeral is pixel column (200 ~ 218), and laterally numeral is pixel column (300～321), and each dot can be understood as a pixel in the screen.
The position that is shaped as " king " word place in screen that round dot among Fig. 3 is formed.Can see that the location of pixels at the first stroke of " king " " " place is to be made up of the pixel between from (202,304) to (204,318).
If when carrying out refresh operation with the DU pattern, the pixel that forms " king " word will be powered pressure, and namely the charged particle of the pixel correspondence of black will change among Fig. 3.Alive effect is that the black particles in the charged particle of this part pixel correspondence is sunk, the white particles come-up, thereby brush into white, this moment next screen will to be refreshed be the blank screen.Because the DU pattern can make " king " word stay ghost (as shown in Figure 4) after carrying out refresh operation.Fig. 4 has shown " king " word brush " in vain " ghost zone later, and as can be seen, the position at the real place of ghost is not the pixel at the original place of " king " word from the screen of electric paper book reality or Fig. 4, but its stroke neighbor on every side.The reason that produces this result is because when giving the pixel making alive of " king " word region, the electric field that voltage produces can have influence on the motion of its ambient particles, namely charged particle should not done any motion around the script, but under electric field effects, can produce slight motion, therefore can present certain greyscale color, produce ghost thus.
Adopt the electric paper book product of EPD screen when showing a secondary data, carry out refresh operation by the EPD controller of using among the CPU.The EPD controller need be known current data (cur data) and content-data (new data) to be shown when carrying out refresh operation, and so-called cur data refers to the current user's data that is shown to; So-called new data refers to and will be shown to user's data at next screen.The EPD controller is by contrasting cur data and new data from look-up table (Look Up Table, LUT) find out the desired value of a correspondence in, and determine that according to this desired value needs are transported to the magnitude of voltage on the screen, then screen is applied voltage to promote the movement of charged particle in the screen, through movement repeatedly, charged particle has reached steady state (SS), has just presented the corresponding content of cur data on the screen.
As seen, if want to eliminate the ghost that " king " word produces, the desired value corresponding with this ghost part need be set in the LUT table, and the voltage of this desired value correspondence can make ghost partly be shown as white, to reach the purpose of elimination ghost.
By above-mentioned analysis as can be known, when becoming Fig. 4 by Fig. 3, the pixel that LUT changes for data provides voltage non-0 control (i.e. the shared pixel of " king " word); For the unaltered pixel of data provides 0 voltage, namely white portion does not change, and these particles just need not move; And around " king " word in fact ghost add also is 0 voltage, only since the pixel of " king " when changing, the particle around the voltage influence of black data has been arrived; But want to control the particle that this part applies the motion that 0 voltage produced, we just need retract the result who produces ghost owing to its unnecessary motion for it adds effective voltage.Mainly comprise following content:
First, control the peripheral charged particle that these data change, we at first will draw the position at these charged particle places, by judging " king " shared locations of pixels, can draw the scope of its " peripheral charged particle ", and be that the gray-scale value of reserving among a kind of waveform is gone up in these peripheral charged particles taxes, this gray-scale value is used for the peripheral charged particle of assurance and does not do any motion.
The second, the purpose of composing gray-scale value for " peripheral charged particle " is exactly that we will change the data of this gray scale in waveform, also with regard to the time to have changed LUT be the data of voltage that this gray scale is sent, thereby controlled the motion of " peripheral particle ".
In order to realize that the embodiment of the invention needs in advance the LUT table to be arranged again, make it not only comprise related content in the former LUT table, also should comprise making neighboring pixel be shown as the numerical value of white or background colour, the voltage of this numerical value correspondence can make neighboring pixel not show the effect of ghost.
Below be introduced with specific embodiment:
As shown in Figure 5, for the embodiment of the invention one provides a kind of method of eliminating ghost, this method can be from truly eliminating ghost, and detailed process is as follows:
When current screen need show, again content-data is presented on the screen as current data;
Content-data comprises data to be displayed and background color data, and neighboring pixel is the adjacent pixels of data to be displayed, and belongs to the pixel in the background color data; The number of neighboring pixel and scope can be determined according to actual needs;
Concrete, can be when content-data deposits storer in or before or depositing storer in after, be shown on the screen before, to next-door neighbour's data to be displayed and be that pixel in the background color data identifies, will have the pixel of sign as described neighboring pixel;
Concrete, when definite a certain pixel has sign, will have the pixel of sign as neighboring pixel, and apply voltage.
For the embodiment of the invention two provides a kind of method of eliminating ghost, this method can be from truly eliminating ghost; Embodiment two is with the difference of embodiment one, further comprises between step 52 and step 53:
In the look-up table that sets in advance, search and described neighboring pixel value corresponding; Determine and described numerical value corresponding voltage value; Comprising for neighboring pixel applies voltage in the step 53 this moment:
For neighboring pixel applies the corresponding voltage of definite magnitude of voltage.
When as seen using this method, data to be displayed and the corresponding charged particle of neighboring pixel thereof are applied different voltage respectively, like this when applying voltage for the corresponding charged particle of data to be displayed, even if the electric field that produces can have influence on the corresponding charged particle of neighboring pixel, but owing to also applied corresponding voltage for the corresponding charged particle of this neighboring pixel, therefore can prevent that the corresponding charged particle of neighboring pixel from because being subjected to arbitrarily rotation of electric field effects, causing ghost to produce.
As shown in Figure 6, the embodiment of the invention also provides a kind of device of eliminating ghost, and described device comprises:
First determining unit 61 is used for definite neighboring pixel that can produce ghost;
Content-data comprises data to be displayed and background color data, described first determining unit 61 specifically is used for: when described content-data deposits storer in, to next-door neighbour's data to be displayed and for the pixel in the background color data identifies, will have the pixel of sign as described neighboring pixel.
Described device also comprises:
Second determining unit 64 is used for determining and described numerical value corresponding voltage value;
Described presser unit 62 specifically is used for, for described neighboring pixel applies the corresponding voltage of definite magnitude of voltage.
In sum, beneficial effect:
When as seen using this method, data to be displayed and the corresponding charged particle of neighboring pixel thereof are applied different voltage respectively, like this when applying voltage for the corresponding charged particle of data to be displayed, even if the electric field that produces can have influence on the corresponding charged particle of neighboring pixel, but owing to also applied corresponding voltage for the corresponding charged particle of this neighboring pixel, therefore can prevent that the corresponding charged particle of neighboring pixel from because being subjected to arbitrarily rotation of electric field effects, causing ghost to produce.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a method of eliminating ghost is characterized in that, described method comprises:
Determine to produce the neighboring pixel of ghost;
For described neighboring pixel applies voltage; Described voltage can make described neighboring pixel be shown as white or background color.
2. the method for claim 1 is characterized in that, described definite neighboring pixel that can produce ghost comprises:
Content-data comprises data to be displayed and background color data;
When described content-data deposits storer in, to next-door neighbour's data to be displayed and for the pixel in the background color data identifies, will have the pixel of sign as described neighboring pixel.
3. the method for claim 1 is characterized in that, after the described neighboring pixel of determining to produce ghost and described apply voltage for described neighboring pixel before, further comprise:
In the look-up table that sets in advance, search and described neighboring pixel value corresponding;
Determine and described numerical value corresponding voltage value;
Describedly apply voltage and comprise for described neighboring pixel:
For described neighboring pixel applies the corresponding voltage of definite magnitude of voltage.
4. a device of eliminating ghost is characterized in that, described device comprises:
First determining unit is used for definite neighboring pixel that can produce ghost;
Presser unit is used to described neighboring pixel to apply voltage; Described voltage can make described neighboring pixel be shown as white or background color.
5. method as claimed in claim 4, it is characterized in that, content-data comprises data to be displayed and background color data, described first determining unit specifically is used for: when described content-data deposits storer in, to next-door neighbour's data to be displayed and for the pixel in the background color data identifies, will have the pixel of sign as described neighboring pixel.
6. method as claimed in claim 4 is characterized in that, described device also comprises:
Search the unit, be used for searching and described neighboring pixel value corresponding at the look-up table that sets in advance;
Second determining unit is used for determining and described numerical value corresponding voltage value;
Described presser unit specifically is used for, for described neighboring pixel applies the corresponding voltage of definite magnitude of voltage.
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| CN2013100722817A CN103247268A (en) | 2013-03-07 | 2013-03-07 | Method and device for blur elimination |
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| CN2013100722817A CN103247268A (en) | 2013-03-07 | 2013-03-07 | Method and device for blur elimination |
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| CN106935208A (en) * | 2015-12-30 | 2017-07-07 | 宏碁股份有限公司 | Drive device and driving method |
| CN108345488A (en) * | 2018-02-13 | 2018-07-31 | 中车青岛四方机车车辆股份有限公司 | The display methods and device at interface |
| CN108463763A (en) * | 2016-02-08 | 2018-08-28 | 伊英克公司 | Method and apparatus for operating electro-optic displays under white mode |
| CN108762596A (en) * | 2018-06-01 | 2018-11-06 | 广州视源电子科技股份有限公司 | The treating method and apparatus of shadow, the display methods and device for showing equipment |
| CN110111746A (en) * | 2019-04-18 | 2019-08-09 | 广州奥翼电子科技股份有限公司 | A kind of electrophoretic display driving method |
| WO2020015388A1 (en) * | 2018-07-19 | 2020-01-23 | 电子科技大学中山学院 | Method for eliminating afterimage in margins of electrophoretic electronic paper |
| US10672350B2 (en) | 2012-02-01 | 2020-06-02 | E Ink Corporation | Methods for driving electro-optic displays |
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| CN115862556A (en) * | 2022-12-30 | 2023-03-28 | 广州文石信息科技有限公司 | Driving method and device of electronic ink screen, display equipment and storage medium |
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| WO2020015388A1 (en) * | 2018-07-19 | 2020-01-23 | 电子科技大学中山学院 | Method for eliminating afterimage in margins of electrophoretic electronic paper |
| CN110111746A (en) * | 2019-04-18 | 2019-08-09 | 广州奥翼电子科技股份有限公司 | A kind of electrophoretic display driving method |
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| CN115862556A (en) * | 2022-12-30 | 2023-03-28 | 广州文石信息科技有限公司 | Driving method and device of electronic ink screen, display equipment and storage medium |
| CN117153118A (en) * | 2023-09-18 | 2023-12-01 | 广州文石信息科技有限公司 | Picture updating method, device and equipment of ink screen and storage medium |
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Application publication date: 20130814 |