CN110111746A - A kind of electrophoretic display driving method - Google Patents
A kind of electrophoretic display driving method Download PDFInfo
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- CN110111746A CN110111746A CN201910313026.4A CN201910313026A CN110111746A CN 110111746 A CN110111746 A CN 110111746A CN 201910313026 A CN201910313026 A CN 201910313026A CN 110111746 A CN110111746 A CN 110111746A
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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
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Abstract
The present invention mentions a kind of driving method of electrophoretic display device (EPD), by showing that drive waveforms are updated the display image of electrophoretic display device (EPD)；After the display image starts update, whole background pixels of updated display image or edge background pixel are driven again to background colour using supplement driving signal.Electrophoretic display driving method provided by the invention can preferably eliminate ghost, promote the display effect of electrophoretic display device (EPD).
Description
Technical field
The invention belongs to display device technical fields, and in particular to a kind of electrophoretic display driving method.
Background technique
Electrophoretic display device (EPD) has many advantages, such as high contrast, broad view, low-power consumption and bistable state.Its display effect picture is common
Paper it is the same, make one reading comfort, and it can convert to refresh as common liquid crystal display and show new content.Because
The use of electrophoresis showed reduces the felling of timber, is advantageously implemented green ecological, thus is pursued by people.Existing electronics
The driving method of paper for example (refers to Fig. 1): 1. will currently show piclear, and black is arrived in driving；2. whole screen drives to white；3.
New grayscale is arrived by new images requirement driving.Due to the influence of electric field between Electronic Paper adjacent pixel, meeting when frame updating drives
The profile of previous picture is remained, referred to as " residual edge shadows ", when following white gravoply, with black engraved characters picture drives to white picture, leaves the text of black
Character wheel is wide, when white with black calligraphy and painting face drives to black picture, leaves the text profile of white.This " residual edge shadows " can be with update
The increase of number and be superimposed, influence reading effect.
For residual edge shadows, it is also disclosed some eliminable driving methods in the prior art.Such as CN108962153A
Disclose a kind of method for eliminating electrophoretic electronic paper edge ghost, comprising the following steps: (1), will show on electronic-paper display screen
That a part of region of image is defined as region A, defines additionally as that a part of region of electronic-paper display screen image background
For region B；(2), apply the voltage of activation image on region A and region B；(3), apply erasing figure on region A and region B
Picture and the voltage for generating dark-grey background；The optimization to driving voltage waveform is realized by applying different voltages, so that particle exists
Stress equalization in the dispersing agent of microcapsules, it is ensured that even particle distribution, in the case where no change device structure and material, at
Function eliminates Electronic Paper residual edge shadows.This method is by adjusting particle stress equalization in the dispersing agent of microcapsules, it is ensured that particle
Be evenly distributed realization.But this method needs generating positive and negative voltage alternately to apply to realize technical effect, but this mode can be led
It causes during eliminating residual edge shadows, background has flickering, and human eye can be uncomfortable, influences the visual experience of user.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of electrophoretic display device (EPD) drive that can preferably eliminate residual edge shadows
Dynamic method.
The present invention provides a kind of driving method of electrophoretic display device (EPD), includes the following steps:
By showing that drive waveforms are updated the display image of electrophoretic display device (EPD)；
After the display image starts update, using supplement driving signal by it is updated display image whole backgrounds
Pixel or edge background pixel are driven again to background colour.
Preferably, the background colour is black or white.
Preferably, the display image of the electrophoretic display device (EPD) is by multiple sub-pixel groups at before certain sub-pixel updates and more
When grayscale after new is identical, when the display drive waveforms are updated the display image of electrophoretic display device (EPD), this will not be updated
Sub-pixel.
Preferably, when display image of the drive waveforms to electrophoretic display device (EPD) is updated, and updates unfinished,
Using supplement driving signal by it is updated display image whole background pixels or edge background pixel drive again to
Background colour.
Preferably, after display image of the drive waveforms to electrophoretic display device (EPD) is completed to update, supplement driving letter is used
Number by it is updated display image whole background pixels or edge background pixel driven again to background colour.
Preferably, the supplement driving signal is 1-10 frame.
Preferably, when the electrophoresis particle of the background pixel is negatively charged, the supplement driving signal is Vneg signal；When
When the electrophoresis particle of the background pixel is positively charged, the supplement driving signal is Vpos signal.
Preferably, the supplement driving signal is continuous signal or unidirectional discontinuous signal.
Preferably, the edge background pixel is the pixel region for showing 1-3 sub-pixel of image peripheral and being formed.
Electrophoretic display driving method provided by the invention can preferably eliminate ghost, promote the display of electrophoretic display device (EPD)
Effect.
Detailed description of the invention
It is more particularly described by the preferred embodiment of the present invention shown in the drawings, the above and other purpose of the present invention, feature
It will be become more fully apparent with advantage.Identical appended drawing reference indicates identical part in all the attached drawings, and not deliberately by real
Size equal proportion scaling in border draws attached drawing, it is preferred that emphasis is shows this purport.
Fig. 1 is the electrophoretic display driving method of the prior art；
Fig. 2 is the display image schematic diagram of the electrophoretic display device (EPD) of the present embodiment；
Fig. 3 is the unidirectional discontinuous signal waveform diagram of Vpos；
Fig. 4 is Vpos continuous waveform signal schematic diagram；
Fig. 5 is the unidirectional discontinuous signal waveform diagram of Vneg；
Fig. 6 is Vneg continuous waveform signal schematic diagram；
Specific embodiment
Technical solution of the present invention is described in further detail combined with specific embodiments below, so that the technology of this field
Personnel can better understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
With reference to Fig. 1-6, the embodiment of the present invention provides a kind of driving method of electrophoretic display device (EPD), includes the following steps:
It requires to be updated the display image of electrophoretic display device (EPD) using display drive waveforms according to new images；The present embodiment
Middle display drive waveforms are updated including various ways the display image of electrophoretic display device (EPD), such as 1. will currently show image
It removes, black is arrived in driving；2. whole screen drives to white；3. arriving new grayscale by new images requirement driving.
It, will using supplement driving signal after showing that image starts to update (after namely showing that drive waveforms begin to use)
The whole background pixels or edge background pixel of updated display image are driven again to background colour, remaining non-background colour
Grayscale will not change.Such as the background colour of electrophoretic display device (EPD) be white, then using display drive waveforms to image into
Row (refers to after signified update after showing that drive waveforms start update) herein after updating, and uses supplement driving signal will again
White is driven into again after update for the white portion of background colour.
With reference to Fig. 2, the electrophoretic display device (EPD) in the present embodiment is by multiple sub-pixel groups at multiple sub-pixels constitute display figure
As 2 and background pixel 1.Supplement driving signal in the present embodiment be to shown after update image 2 background pixel 1 carry out more
Newly, which can be is driven for updated whole background pixels 1 or edge background pixel 3.
Signified edge background pixel 3 refers to the background pixel 1 around updated display image 2 in the present embodiment.It is being preferably implemented
Show that the pixel of 1-3 subpixel area of image peripheral is known as edge background pixel 3 in example.Supplement driving letter can either be reduced
Number use the time, while can also ensure that and whole ghosts are all realized into elimination.
The driving method of the electrophoretic display device (EPD) of the present embodiment will show image after update by using supplement driving signal
Background pixel is driven again to background colour, can preferably eliminate the ghost that an image leaves, and promotes display effect.This
Embodiment reuses supplement driving signal and is driven, can preferably determine update after display drive waveforms begin to use
The background area of display image afterwards, it is thus possible to realize that the background pixel to new display image carries out secondary refreshing.
After signified display drive waveforms begin to use in the present embodiment, it can be tight after display drive waveforms begin to use
Then updated background colour is driven using supplement driving signal；Such as in one of preferred embodiment, work as display
Drive waveforms are updated the display image of electrophoretic display device (EPD), and update do not complete when, using supplement driving signal will more
The whole background pixels or edge background pixel of display image after new are driven again to background colour.Display drive waveforms are opened
The background pixel of new display image can be determined after beginning use, therefore is able to use supplement driving signal to new display image
Background pixel driven.Supplement driving signal and then show drive waveforms carry out, it is more enough so that electrophoretic display device (EPD) more
New and elimination ghost carries out in succession, and the update of the display image of electrophoretic display device (EPD) is very fast.
In a further advantageous embodiment, after showing that drive waveforms are completed to update to the display image of electrophoretic display device (EPD),
Supplement driving signal is reused to drive whole background pixels of updated display image or edge background pixel again
To background colour, there can be preferable elimination ghost effect.
The driving method of the electrophoretic display device (EPD) of the present embodiment reuses supplement driving after display drive waveforms begin to use
Signal drives whole background pixels of updated display image or edge background pixel again to background colour.It can be compared with
Good elimination residual edge shadows, while relative to the mode for just eliminating ghost before frame updating, it can preferably reduce background sudden strain of a muscle
It is bright, provide the user with more preferably visual experience.
In a preferred embodiment, background colour is black or white.Black/white electrophoretic display is because background color is black-and-white two color
Particle can preferably realize the residual edge shadows eradicating efficacy of black/white electrophoretic display using the driving method of the present embodiment.
In a preferred embodiment, display drive waveforms, which are updated the display image of electrophoretic display device (EPD), is turned over using office's brush
Page mode can further eliminate residual edge shadows.When office's brush refers to current picture page turning to next new picture, if certain of two figures
One same pixel is same gray level, then this pixel does not refresh.Specially the display image of electrophoretic display device (EPD) is by multiple sub-pixel groups
At, when identical with updated grayscale before certain sub-pixel updates, show drive waveforms to the display image of electrophoretic display device (EPD) into
When row updates, the sub-pixel will not be updated.Background flashing can also be eliminated by the way of office's brush page turning, for example, if front and back two
Opening figure background is all white, and when using office's brush mode, background color is essentially not have any gray scale variation, is not flashed, and is promoted
Display effect.And office's brush mode carries out the mode of residual edge shadows elimination with the use of supplement driving signal, so that entire electrophoresis
Display does not have obvious background flashing in the process of update, on the one hand can preferably eliminate residual edge shadows, another
Aspect, which can also reduce background flashing, leads to user's visual fatigue.
The electrophoretic display device (EPD) of the present embodiment successively includes that transparent front plate, electrophoretic display layer and backboard form from outside to inside, thoroughly
Bright foreboard and backboard are used for the both ends in electrophoretic display layer and apply electric signal, so that the electrophoresis particle in electrophoretic display layer is in electric field
Under the action of move.Driving electrodes can be set in transparent front plate in the present embodiment, public electrode is set on backboard.?
Driving electrodes can be set on backboard, public electrode is set on foreboard.Electrophoretic display layer in the present embodiment is by electrophoresis
Display liquid is coated on transparent front plate or backboard and obtains after solidification, it is preferable that the display in electrophoresis disclosing solution in the present embodiment
Micro unit is microcapsules.
In a preferred embodiment, supplement driving signal is Vneg signal or Vpos signal, in a preferred embodiment, Vneg letter
Number or Vpos signal be 1-10 frame.
With reference to Fig. 5 and Fig. 6, in a preferred embodiment, when the electrophoresis particle of background pixel is negatively charged, driving signal is supplemented
For Vneg signal；Vneg signal is negative voltage, and Vneg signal is -15V in further preferred embodiments.Such as white electrophoretic grain
Subband negative electricity, when showing that the background colour of image is white after update, supplement driving signal is -15V voltage, by updated back
Scene element is driven again to white.Vneg signal is continuous signal (referring to Fig. 6) in further preferred embodiments；Or
Vneg signal is unidirectional discontinuous signal (referring to Fig. 5).
With reference to Fig. 3 and Fig. 4, when the electrophoresis particle of background pixel is positively charged, supplement driving signal is Vpos signal, Vpos
Signal is positive voltage, and Vpos signal is+15V in further preferred embodiments.Such as black electrophoretic particles are positively charged, work as update
When the background colour for showing image afterwards is black, supplement driving signal is+15V voltage, and updated background pixel is driven again
It moves to black.In further preferred embodiments, Vpos signal is continuous signal (referring to Fig. 4), alternatively, Vpos signal is unidirectional
Discontinuous signal (refers to Fig. 3)
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (9)
1. a kind of driving method of electrophoretic display device (EPD), which comprises the steps of:
By showing that drive waveforms are updated the display image of electrophoretic display device (EPD)；
After the display image starts update, using supplement driving signal by it is updated display image whole background pixels
Or edge background pixel is driven again to background colour.
2. the driving method of electrophoretic display device (EPD) as described in claim 1, which is characterized in that the background colour is black or white
Color.
3. the driving method of electrophoretic display device (EPD) as described in claim 1, which is characterized in that the display figure of the electrophoretic display device (EPD)
Picture is by multiple sub-pixel groups at when identical as updated grayscale before certain sub-pixel updates, the display drive waveforms are to electricity
When the display image of phoretic display is updated, the sub-pixel will not be updated.
4. the driving method of electrophoretic display device (EPD) as described in claim 1, which is characterized in that when the drive waveforms are aobvious to electrophoresis
Show that the display image of device is updated, and update when not completing, using supplement driving signal by updated display image
Whole background pixels or edge background pixel are driven again to background colour.
5. the driving method of electrophoretic display device (EPD) as described in claim 1, which is characterized in that when the drive waveforms are aobvious to electrophoresis
Show device display image complete update after, using supplement driving signal by it is updated display image whole background pixels or
Edge background pixel is driven again to background colour.
6. the driving method of electrophoretic display device (EPD) as described in claim 1, which is characterized in that the supplement driving signal is 1-10
Frame.
7. the driving method of electrophoretic display device (EPD) as described in claim 1, which is characterized in that when the electrophoresis grain of the background pixel
When subband negative electricity, the supplement driving signal is Vneg signal；When the electrophoresis particle of the background pixel is positively charged, the benefit
Filling driving signal is Vpos signal.
8. the driving method of electrophoretic display device (EPD) as claimed in claim 7, which is characterized in that the supplement driving signal is continuous
Signal or unidirectional discontinuous signal.
9. the driving method of electrophoretic display device (EPD) as described in claim 1, which is characterized in that the edge background pixel is display
The pixel region that 1-3 sub-pixel of image peripheral is formed.
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| CN201910313026.4A CN110111746B (en) | 2019-04-18 | 2019-04-18 | Driving method of electrophoretic display |
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| CN111048046A (en) * | 2019-12-04 | 2020-04-21 | 广州奥翼电子科技股份有限公司 | Driving method of double-color electrophoretic display |
| CN113838428A (en) * | 2021-09-18 | 2021-12-24 | 青岛海信移动通信技术股份有限公司 | Ink screen refreshing method and terminal equipment |
| CN115359763A (en) * | 2022-08-16 | 2022-11-18 | 广州文石信息科技有限公司 | Ink screen display control method, device, equipment and storage medium |
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