CN106782350A - A kind of method that electrophoretic display device (EPD) weakens ghost border - Google Patents
A kind of method that electrophoretic display device (EPD) weakens ghost border Download PDFInfo
- Publication number
- CN106782350A CN106782350A CN201710004774.5A CN201710004774A CN106782350A CN 106782350 A CN106782350 A CN 106782350A CN 201710004774 A CN201710004774 A CN 201710004774A CN 106782350 A CN106782350 A CN 106782350A
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- Prior art keywords
- gtg
- electronic paper
- border
- particle
- voltage
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
Abstract
The invention discloses a kind of method that electrophoretic display device (EPD) weakens ghost border, including activation stage：Electronic Paper particle in the first GTG is applied into a driving voltage opposite with the second GTG driving direction；The display stage：The Electronic Paper particle for being applied with driving voltage be first begin to drive display, and the Electronic Paper particle in the second GTG be in the first GTG Electronic Paper particle it is different when apply opposite polarity voltage.What the present invention provided that a kind of electrophoretic electronic paper weakens border puts method, by controlling the Waveform Design in activation stage and display stage, realizes, in fast refresh, reducing the generation of the border issue in Electronic Paper ghost phenomenon.The present invention, using the time of the applied voltage that staggers, largely reducing the generation of border issue in the display stage, in terms of image fast refresh, greatly improve the quality that image shows.It is widely used in electrophoretic display technology field.
Description
Technical field
The present invention relates to the method that electrophoretic display technology field, particularly electrophoretic electronic paper eliminate ghost.
Background technology
Electrophoretic electronic paper（EPD）E-book reader, electronic tag, electronic bill-board etc. are had been widely used for, its tool
For bistable characteristic well, in static state display, hardly power consumption is a kind of display skill for possessing energy-conserving and environment-protective characteristic
Art.However, also there are a series of shortcomings in electrophoretic electronic paper, for example：The ghost of previous sub-picture can be left in image refreshing, and
These ghosts are not quite similar to the influence degree that new images show, a kind of border phenomenon is included in ghost phenomenon, and this border shows
It is particularly evident as when gray-scale areas refresh, during drive waveforms imperfection, obvious shadow can be produced to the refreshing of image
Ring.
The origin cause of formation of border phenomenon it is main by it is following some constitute, the GTG in boundaries on either side have selected different drivings
Waveform, if two kinds of waveforms simultaneously in the state of one high and one low, can form an electric field for horizontal direction in boundary, from
And influence the proper motion of vertical direction particle.And black and white particle be in the case where applying without electric field without electrical, so,
The particle of side is only driven, reciprocal influence is substantially reduced between can making particle.
EPD drive waveforms be by TFT backplate applied voltage, so as to drive the particle in Electronic Paper microcapsules so that
Allow what Electronic Paper showed.In Electronic Paper microcapsule particle system, can be produced electrically under electric field action due to particle, black C
Particle is negatively charged, white TIO2 particles positively charged, and white particles volume ratio black particles are big, and electrically relatively weak, causes
Under same electric field action, black particles motion is rapider.When capsule is in two reversed electric field intersections, due to electric field intersection
The electric interfering field of generation can influence particle in the vertical direction to move.
Therefore, based on problem above, it is necessary to be improved.
The content of the invention
In order to solve the above-mentioned technical problem, it is an object of the invention to provide the side that a kind of electrophoretic display device (EPD) weakens ghost border
Method.
The technical solution adopted in the present invention is：
A kind of method that electrophoretic display device (EPD) weakens ghost border, including
The activation stage：It is opposite with the second GTG driving direction that the Electronic Paper particle of the first GTG receives the applying that system sends
The signal of driving voltage, and enter the activation stage；
The display stage：The Electronic Paper particle for being applied with driving voltage is first begin to drive display, and in the second GTG
Electronic Paper particle applies opposite polarity voltage when different from the Electronic Paper particle in the first GTG.
Further, the display stage, after the Electronic Paper particle in the first GTG drives completion a period of time, it is
System sends applied voltage signal to the Electronic Paper particle in the second GTG.
Further, the first GTG described in the activation stage is the GTG changed to thin shade.
Further, the display stage, the Electronic Paper particle in the second GTG is applied one and the first GTG is in
The opposite voltage of Electronic Paper particle polarity of voltage.
The beneficial effects of the invention are as follows：What the present invention provided that a kind of electrophoretic electronic paper weakens border puts method, is swashed by control
Stage living and the Waveform Design in display stage, realize, in fast refresh, reducing the border issue in Electronic Paper ghost phenomenon
Generation.Prior art drive waveforms cannot accomplish to avoid the generation of ghost border issue, this hair in terms of fast refresh image
The time of the bright applied voltage that staggers in the use of display stage, the generation of border issue is largely reducing, in image fast refresh side
Face, greatly improves the quality that image shows.
Brief description of the drawings
Specific embodiment of the invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is the applying of one embodiment of the invention to the driving voltage waveform of the first GTG Electronic Paper particle；
Fig. 2 is the applying of one embodiment of the invention to the driving voltage waveform of the second GTG Electronic Paper particle；
Fig. 3 is the schematic diagram of prior art；
Fig. 4 is the schematic diagram of one embodiment of the invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.
A kind of method that electrophoretic display device (EPD) weakens ghost border, including
The activation stage：Electronic Paper particle in the first GTG is applied into a driving electricity opposite with the second GTG driving direction
Pressure；
The display stage：The Electronic Paper particle for being applied with driving voltage is first begin to drive display, and in the second GTG
Electronic Paper particle can not simultaneously apply opposite polarity voltage with the Electronic Paper particle in the first GTG.
Preferably, the display stage, after the Electronic Paper particle in the first GTG drives completion a period of time, then will
Electronic Paper particle applied voltage in the second GTG.
Preferably, the first GTG described in the activation stage is the GTG changed to thin shade.
Preferably, the display stage, the Electronic Paper particle in the second GTG is applied one and the first GTG is in
The opposite voltage of Electronic Paper particle polarity of voltage.
In electrophoretic display device (EPD) each pixel electrode correspondence one pixel, on the pixel electrode apply drive letter waveform with
Realize that target gray scale shows.
Selection drive waveforms：By the gray level information and the second two field picture corresponding pixel points of the first two field picture corresponding pixel points
Gray level information determines to show the drive waveforms applied needed for the second frame jointly.
The region different in display screen, can typically show different GTGs, in two kinds of intersections of target gray scale, hold
It is also easy to produce ghost border phenomenon.The optimization drive waveforms that this programme is provided, make use of elimination, pressing time of staggering, the side of time delay
Method, border phenomenon is significantly weakened.
Two kinds of waveforms in boundaries on either side, it is necessary to show the time in stage T2 in drive EPD display, so as to show
Target gray scale；, it is necessary to the high/low voltage that apply respectively that will stagger the time in the T2 times, it is to avoid high-low voltage is appeared in for the moment
Between and produce border issue.
Preferably, in the T3 time periods, a survey of first applied voltage needs the decrease for waiting particle electrical, then in opposite side
Start to apply driving voltage, so as to the particle for avoiding boundaries on either side is produced electrically simultaneously, influence is produced mutually；And need in activation
The last issuable border of refreshing is eliminated in time in stage T1.
A：In the activation stage, the Electronic Paper particle in border side is applied one and to target gray scale driving voltage side
To opposite driving voltage, the Electronic Paper particle of border opposite side not applied voltage.
B1：In the display stage, the side particle of activation motion is able in the activation stage, is first begin to drive display.
B2：After the completion of the side drives, into one section of stand-by period, after waiting for, opposite side initially enters display again
Stage.
Preferably, the side for being driven first in the activation stage be from the deeper GTG of gray scale to white gray scale variation, this
It is because in Electronic Paper, the motion of white particles is increasingly difficult compared with black particles.
Preferably, the working time of the waveform is shorter, and suitable fast refresh goes out several two field pictures without producing border to ask
Topic.
Preferably, when black and white is used as target gray scale, because the driving of particle is more thorough, border issue can quilt
Cover, such that it is able in the display stage, even if both sides will apply opposite voltage, without staggering completely simultaneously, so as to do
To time-consuming.
Reference picture 1-2, is one embodiment of the invention：First, A：Border upper area has been selected and ripple has been driven shown in Fig. 1
Shape.Border lower zone has selected drive waveforms in Fig. 2.Part drive waveforms are to light gray from white (W) on border（LG）Change,
Part drive waveforms are by black under border（B）To light gray（LG）Change.
As a specific embodiment, in the waveform of W-LG, a high voltage 60ms is only provided, because black particles
Motion it is more fast quick, from white GTG to light gray gray scale variation when, can without activate particle process.
In the waveform of B-LG, high voltage is first applied with, black particles are moved upwards, is then followed by being applied with low electricity
Pressure, white particles are moved upwards, and light gray is changed into from black.High voltage is applied with 40ms, and low-voltage is applied with 80ms, the height of applying
Low-voltage realizes the activation to black and white particle, while low-voltage provides process of the black to light gray gray scale variation.
1：When it is light gray/dark-grey GTG to refresh GTG, border can be left to finally by obvious, will not be capped, and this is
Caused by black particle is not moved fully to upper surface.So the drive waveforms shown in reference picture 2, are suitable for most
End drives light gray/dark-grey grade GTG.
2：For activating particle in the T1 times.The side that selection will upwards spring up white particle drives first, another
The waveform of side is waited for, this be white particle compare black particle be difficult to activation due to.
3：The T2 time periods are used to show target image that the difference of this section of drive waveforms to be, by the reverse electricity of both sides
The time for applying is pressed to stagger, and the side first activated is the side that and then there are driving voltage in the T1 stages, so can the company of causing
Continuous one high and one low voltage is exactly completed and once activates.After side display voltage is added, the duration of T3 is waited so that the side
Particle electrically cut down, then apply reverse voltage in opposite side, reach the GTG for wanting arrival.
In both the above waveform, within the T1 times, only B-LG waveforms are applied with high voltage.Within the T2 times, B-LG ripples
Shape is applied with low-voltage first, and the process of activation is completed jointly with the high voltage in T1, while realizing the process of display again.
In the T2 times, after the low-voltage of B-LG GTGs terminates, after waiting the T3 times, W-LG GTGs start to apply high voltage, for showing
Show target gray scale；The wherein T3 times are simulation chronomere 20ms.
Comparison diagram 3 and Fig. 4, it may be clearly seen that, using the solution of the present invention after, ghost border originally（Shown in Fig. 3
White）Phenomenon, having significantly improve and weaken.
Region in marginal portion both sides may be at different GTGs originally；When the both sides are respectively to dark and light color
During refreshing, edge effect can be produced easily；Driven relatively easily to dark GTG, can there is no the activation stage, be directly entered aobvious
Show the stage（Negative voltage）；Difficulty is driven to light GTG, so needing to add one to dark gray scale variation（Negative voltage）In short-term
Between activate the stage, then enter back into the display stage（Positive voltage）, GTG starts to shoal.This two side areas refreshed in the display stage
When middle, the side for generally being driven to light color adds positive voltage first, and the duration is t.Dark color drives side to need, and wait is light to drive
After dynamic time t, then one section of short time T3 is waited, then start to apply negative voltage.
What the present invention provided that a kind of electrophoretic electronic paper weakens border puts method, by the ripple for controlling activation stage and display stage
Shape is designed, and realizes, in fast refresh, reducing the generation of the border issue in Electronic Paper ghost phenomenon.Prior art drives ripple
Shape cannot accomplish to avoid the generation of ghost border issue in terms of fast refresh image, and the present invention is applied in the display stage using staggering
The alive time, the generation of border issue is largely reducing, in terms of image fast refresh, greatly improve what image showed
Quality.
Above is preferable implementation of the invention is illustrated, but the invention is not limited to the implementation
Example, those of ordinary skill in the art can also make a variety of equivalent variations or replace on the premise of without prejudice to spirit of the invention
Change, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of method that electrophoretic display device (EPD) weakens ghost border, it is characterised in that including
The activation stage：It is opposite with the second GTG driving direction that the Electronic Paper particle of the first GTG receives the applying that system sends
The signal of driving voltage, and enter the activation stage；
The display stage：The Electronic Paper particle for being applied with driving voltage is first begin to drive display, and in the second GTG
Electronic Paper particle applies opposite polarity voltage when different from the Electronic Paper particle in the first GTG.
2. the method that electrophoretic display device (EPD) according to claim 1 weakens ghost border, it is characterised in that：The display rank
Section, after the Electronic Paper particle in the first GTG drives and completes a period of time, system sends applied voltage signal in the
The Electronic Paper particle of two GTGs.
3. the method that electrophoretic display device (EPD) according to claim 1 weakens ghost border, it is characterised in that：Described in the activation stage
First GTG is the GTG changed to thin shade.
4. the method that electrophoretic display device (EPD) according to claim 1 weakens ghost border, it is characterised in that：The display rank
Section, an electricity opposite with the Electronic Paper particle polarity of voltage in the first GTG is applied by the Electronic Paper particle in the second GTG
Pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004774.5A CN106782350A (en) | 2017-01-04 | 2017-01-04 | A kind of method that electrophoretic display device (EPD) weakens ghost border |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004774.5A CN106782350A (en) | 2017-01-04 | 2017-01-04 | A kind of method that electrophoretic display device (EPD) weakens ghost border |
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Family
ID=58950932
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| CN201710004774.5A Pending CN106782350A (en) | 2017-01-04 | 2017-01-04 | A kind of method that electrophoretic display device (EPD) weakens ghost border |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110910841A (en) * | 2019-12-16 | 2020-03-24 | 电子科技大学中山学院 | System and method for reducing ghost image of electrophoretic electronic paper |
| CN111402818A (en) * | 2020-03-31 | 2020-07-10 | 重庆京东方智慧电子系统有限公司 | Driving method of color electronic paper and color electronic paper |
| CN111508440A (en) * | 2020-03-25 | 2020-08-07 | 广州奥翼材料与器件研究院有限公司 | Driving method of electrophoretic display |
| CN113096608A (en) * | 2019-12-19 | 2021-07-09 | 京东方科技集团股份有限公司 | Electrophoresis display panel, driving method thereof and display device |
| CN113870801A (en) * | 2021-09-28 | 2021-12-31 | 青岛海信移动通信技术股份有限公司 | Method for refreshing ink screen and terminal equipment |
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| 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 |
| CN110111746B (en) * | 2019-04-18 | 2021-04-06 | 广州奥翼电子科技股份有限公司 | Driving method of electrophoretic display |
| CN110910841A (en) * | 2019-12-16 | 2020-03-24 | 电子科技大学中山学院 | System and method for reducing ghost image of electrophoretic electronic paper |
| CN113096608A (en) * | 2019-12-19 | 2021-07-09 | 京东方科技集团股份有限公司 | Electrophoresis display panel, driving method thereof and display device |
| CN111508440A (en) * | 2020-03-25 | 2020-08-07 | 广州奥翼材料与器件研究院有限公司 | Driving method of electrophoretic display |
| CN111508440B (en) * | 2020-03-25 | 2021-05-25 | 广州奥翼材料与器件研究院有限公司 | Driving method of electrophoretic display |
| CN111402818A (en) * | 2020-03-31 | 2020-07-10 | 重庆京东方智慧电子系统有限公司 | Driving method of color electronic paper and color electronic paper |
| WO2021196869A1 (en) * | 2020-03-31 | 2021-10-07 | 京东方科技集团股份有限公司 | Method for driving color e-paper, and color e-paper |
| US11747703B2 (en) | 2020-03-31 | 2023-09-05 | Chongqing Boe Smart Electronics System Co., Ltd. | Method for driving color electronic paper and color electronic paper |
| CN113870801A (en) * | 2021-09-28 | 2021-12-31 | 青岛海信移动通信技术股份有限公司 | Method for refreshing ink screen and terminal equipment |
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