CN109656076A - Electrophoretic display device, EDD and its driving method, electrophoretic display apparatus - Google Patents
Electrophoretic display device, EDD and its driving method, electrophoretic display apparatus Download PDFInfo
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- CN109656076A CN109656076A CN201910059458.7A CN201910059458A CN109656076A CN 109656076 A CN109656076 A CN 109656076A CN 201910059458 A CN201910059458 A CN 201910059458A CN 109656076 A CN109656076 A CN 109656076A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
Abstract
The present invention provides a kind of electrophoretic display device, EDD and its driving method, also provides a kind of display device.Electrophoretic display device, EDD of the invention includes two substrates being oppositely arranged, two kinds of electrodes are arranged in alternate intervals on one substrate, also at least one electrode is arranged in interval on another substrate, electronic ink layer, electronic ink layer is set between the electrode layer of opposite two substrates, by applying different voltage, make to be located in the middle electrification ink particle to itself opposite polarity electrode movement, to show different states.Adjacent pixel boundaries are clear when electrophoretic display device, EDD of the invention develops the color, and improve display effect, and shorten the motion path of part ink particle to a certain extent, shorten the response device time, reduce device overall power.
Description
Technical field
The present invention relates to packing technique field, in particular to a kind of electrophoretic display device, EDD and the display device
Driving method has further related to a kind of electrophoretic display apparatus.
Background technique
Electronic Paper has height close to the reading experience of paper, does not hurt eyes, is suitble to read for a long time, and battery uses the longevity
The advantages that long is ordered, the fields such as electronics price tag, e-book are widely used in.
Electronic Paper mainly realizes display using E ink electrophoretic techniques, containing electrification ink particle in Electronic Paper, when
The electrode of electrification ink particle two sides gives opposite voltage, charges ink particle under electric field action, it may occur that electrophoretic action, quilt
Two lateral electrodes attract and repel, to show illuminated state or dark-state.The motion mode of electrification ink particle in the electric field both will affect aobvious
Show image quality, and will affect the response time of picture, and then influences power consumption.
It should be noted that the information in the invention of above-mentioned background technology part is only used for reinforcing the reason to background of the invention
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
It is existing to solve the purpose of the present invention is to provide a kind of electrophoretic display device, EDD and the driving method of the display device
One or more problems existing for display device.
According to an aspect of the present invention, a kind of electrophoretic display device, EDD is provided, comprising:
First substrate；
The second substrate is oppositely arranged with the first substrate；
First electrode layer is set to the first substrate and arranges close to the surface of the second substrate, including alternate intervals
Plurality of first electrodes and the plurality of second electrodes, the projected area of the first electrode on the first substrate be greater than it is described second electricity
The projected area of pole on the first substrate, and the first electrode is transparent electrode；
The second electrode lay, is set to the second substrate close to the surface of the first substrate, more including what is be intervally arranged
A third electrode；
Electronic ink layer, between the first electrode layer and the second electrode lay.
In a kind of illustrative embodiments of the invention, the multiple third electrode and the multiple first electrode are one by one
Face setting, or, face is arranged one by one for the multiple third electrode and the multiple second electrode.
In a kind of illustrative embodiments of the invention, the second electrode lay further includes multiple 4th electrodes, described
Multiple third electrodes and the arrangement of multiple 4th electrode alternate intervals, projected area of the third electrode in the second substrate are greater than
The projected area of 4th electrode on the second substrate, and face is set the third electrode one by one with the first electrode
It sets, face is arranged one by one for the 4th electrode and the second electrode.
In a kind of illustrative embodiments of the invention, the third electrode is transparent electrode；The electrophoretic display device (EPD)
Part further includes reflecting layer, the side set on the second substrate far from the second electrode lay.
In a kind of illustrative embodiments of the invention, at least one in the second electrode and the 4th electrode is transparent
Electrode.
In a kind of illustrative embodiments of the invention, first electrode projection on the second substrate and institute
The coincidence of third electrode is stated, and the projection of the second electrode on the second substrate is overlapped with the 4th electrode.
In a kind of illustrative embodiments of the invention, the second electrode and the 4th electrode are strip shaped electric poles.
In a kind of illustrative embodiments of the invention, the width of the second electrode and the 4th electrode is 2~6 μm.
In a kind of illustrative embodiments of the invention, the width of the first electrode and third electrode is 80~120 μ
m。
In a kind of illustrative embodiments of the invention, have the between the adjacent first electrode and second electrode
One gap has the second gap, between first gap and described second between the adjacent third electrode and the 4th electrode
The width of gap is 4~8 μm.
According to another aspect of the present invention, a kind of electrophoretic display apparatus is additionally provided, including above-described electrophoresis is shown
Show device.
According to a further aspect of the invention, additionally provide a kind of driving method of electrophoretic display device, EDD, for drive with
The upper electrophoretic display device, EDD, the driving method include:
Apply first voltage to the first electrode, Xiang Suoshu second electrode applies second voltage, Xiang Suoshu third electrode
Apply first voltage or second voltage, the first voltage is different from second voltage, so that the electrification oil of the electronic ink layer
Black particle buildup is on the third electrode and electrode identical with the third electrode voltage, to show first state；
Apply tertiary voltage to the first electrode, Xiang Suoshu second electrode applies the 4th voltage, Xiang Suoshu third electrode
Apply tertiary voltage or the 4th voltage, the tertiary voltage is different from the 4th voltage, so that the electrification oil of the electronic ink layer
Black particle buildup is on the electrode different from the third electrode voltage, to show the second state.
In a kind of illustrative embodiments of the invention, the electrophoretic display device, EDD further includes multiple 4th electrodes, institute
Multiple third electrodes and the arrangement of multiple 4th electrode alternate intervals are stated, projected area of the third electrode in the second substrate is big
In the projected area of the 4th electrode on the second substrate, and the third electrode and the first electrode face one by one
Face is arranged one by one for setting, the 4th electrode and the second electrode；The driving method includes:
Apply first voltage to the first electrode and the third electrode, and to the second electrode and the 4th electricity
Pole applies second voltage, and the first voltage is different from second voltage, so that the electrification ink particle of the electronic ink layer is poly-
Collection is in the first electrode and the third electrode, to show first state；
Apply tertiary voltage to the first electrode and the third electrode, and to the second electrode and the 4th electricity
Pole applies the 4th voltage, and the tertiary voltage is different from the 4th voltage, so that the electrification ink particle of the electronic ink layer is poly-
Collection is in the second electrode and the 4th electrode, to show the second state.
Two kinds of electrodes are arranged in alternate intervals on one substrate of the invention, and it is at least one to be also spaced setting on another substrate
Electrode, by applying different voltage, make to be located in the middle electrification ink particle to itself opposite polarity electrode movement, with
Show different states.On the one hand, adjacent pixel boundaries are clear when the electrode being spaced apart to develop the color, and it is saturating to avoid a whole face
The prescribed electrode unclear problem of boundary between the pixels, improves display effect.On the other hand, two kinds of electrodes apply on same substrate
When different voltages, marginal position will form weak electric field, have a small amount of ink particle that can directly move therebetween, without to
Opposite side electrode movement, shortens the response time to a certain extent, advantageously reduces device overall power.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.It should be evident that the accompanying drawings in the following description is only the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of conventional electrophoretic part；
Fig. 2 is the schematic diagram that conventional electrophoretic part shows dark-state；
Fig. 3 is the schematic diagram that conventional electrophoretic part shows transition state；
Fig. 4 is the schematic diagram that conventional electrophoretic part shows illuminated state；
Fig. 5 is the schematic diagram that conventional electrophoretic part shows illuminated state and dark-state simultaneously；
Fig. 6 is the structure top view of electrophoretic display device, EDD of the present invention；
Fig. 7 be Fig. 6 in A-A to the first structure show illuminated state when cross-sectional view；
Fig. 8 be Fig. 6 in A-A to the first structure show dark-state when cross-sectional view；
Fig. 9 be Fig. 6 in A-A to second of structure show illuminated state when cross-sectional view；
Figure 10 be Fig. 6 in A-A to second of structure show dark-state when cross-sectional view；
Figure 11 be Fig. 6 in A-A to the third structure display schematic diagram；
Figure 12 be Fig. 6 in A-A to the third structure show illuminated state schematic diagram；
Figure 13 be Fig. 6 in A-A to the third structure show dark-state schematic diagram；
Figure 14 be Fig. 6 in A-A to the third structure show illuminated state and dark-state schematic diagram.
In figure, 1, upper substrate；2, lower substrate；3, whole face ito thin film；4, reflecting layer；5, strip ito thin film；6, ink particle
Son；7, first electrode；8, second electrode；9, third electrode；10, the 4th electrode.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
In the related technology, the structure of electrophoretic display device, EDD is as shown in Figure 1, upper substrate 1 and lower substrate 2 are oppositely arranged, upper base
It is covered on the inside of plate 1 whole face ito thin film 3 (indium tin oxide transparent conductive semiconductor film), formation public electrode, outside lower substrate 2
Side is covered with reflecting layer 4, is spaced strip ito thin film 5 on the inside of lower substrate 2, forms pixel electrode.Upper substrate 1 is under
2 central filler of substrate has electrophoresis liquid, contains electrification ink particle 6 in electrophoresis liquid.
For charging ink particle and be positively charged black ink particle, dark-state (display black) is if desired formed,
0V voltage can then be applied on the public electrode on the inside of upper substrate, pixel electrode does not apply voltage, positively charged black oil
Black particle can free diffusing in whole face transparent electrode up to spreading uniformly on public electrode, formation dark-state, as shown in Fig. 2,
But ink particle diffusion velocity is slower under which.Another way is that application 0V voltage, pixel electrode are applied on public electrode
Add+10~+20V voltage, repel voltage to be formed to positively charged ink particle, until ink particle is in whole face transparent electrode
Upper sufficiently diffusion, forms dark-state, and the diffusion velocity of which is fast, and effect is better than the former.
If desired illuminated state (display reflecting layer color) is formed, current potential+10~+20V voltage can be applied in public electrode, as
Plain electrode applies 0 current potential, forms forward voltage, and positively charged black ink particle can gradually be moved to pixel electrode side,
Intermediates are initially formed in moving process, as shown in figure 3, forward voltage is continuously applied, until all ink particles move
To near pixel electrode, the black matrix structure of similar LCD structure is formed, the space between pixel electrode can be with reflective at this time
Layer back end color, is presented illuminated state, as shown in Figure 4.If the alternate effect of illuminated state, dark-state need to be formed, electricity can be applied in public electrode
Position 0V voltage, two pixel electrodes apply+10~+20V voltage and -10~-20V voltage respectively, form opposite electric field, make oil
Black particle is moved to opposite polarity direction, to realize illuminated state, dark-state alternating, as shown in Figure 5.
Since the ito thin film 3 of upper substrate is a whole face structure, width when ink particle is distributed every time may be because voltage
Variation can have differences, cause boundary between pixel unit unintelligible, influence image quality.And it is currently limited by particle concentration
It influences, box thickness is generally large, and the distance between upper substrate and lower substrate are between 10~30um.Since ink particle is made in electrophoresis
It is all moved to a direction under, then the Whole Response time can be slow, on the one hand will affect display image quality, on the other hand makes
Power consumption is higher.
A kind of electrophoretic display device, EDD is provided in embodiment of the present invention, is shown picture using electrophoretic techniques principle, is such as schemed
Shown in 6- Figure 14, the electrophoretic display device, EDD of present embodiment includes the first substrate (upper substrate 1) being oppositely arranged and the second substrate
(lower substrate 2).First substrate is provided with first electrode layer close to the surface of the second substrate, and first electrode layer includes alternate intervals row
The multiple first electrodes 7 and multiple second electrodes 8 of cloth, the projected area of first electrode 7 on the first substrate are greater than second electrode 8
Projected area on the first substrate, and first electrode 7 is transparent electrode.The second substrate is provided with close to the surface of first substrate
The second electrode lay, the second electrode lay include the multiple third electrodes 9 being intervally arranged；It is set between first electrode layer and the second electrode lay
It is equipped with electronic ink layer.
First electrode 7 is used as pixel electrode, is used for display pixel color, second electrode 8 for providing electric field, with storage or
Release electrification ink particle 6, auxiliary first electrode 7 develop the color.Third electrode 9 can be identical as first electrode 7, for showing
Pixel color, can also be acted on second electrode 8 it is identical, for store or discharge electrification ink particle 6, assist first electrode 7
It develops the color.Be separated between transparent first electrode 7 by second electrode 8, third electrode 9 also to be spaced apart so that
Adjacent pixel boundaries are clear when colour developing, avoid a whole face transparent electrode unclear problem of boundary between the pixels, also improve
Display effect.And first electrode and second electrode are different voltages, be will form between first electrode edge and second electrode faint
Electric field has a small amount of ink particle that can directly move therebetween, without the third electrode movement to opposite side, to a certain degree
On saved the response time.
It therefore,, should be as far as possible in order not to interfere the color developing effect of first electrode 7 under the premise of being capable of providing electric field
Reduction second electrode 8 size, make the projected area of second electrode 8 on the first substrate much smaller than first electrode 7 first
Projected area on substrate.As shown in fig. 6, the preferred strip shaped electric poles of second electrode 8, the shape processing simple process.First electrode 7
It is made of transparent conductive material, such as can be tin indium oxide (ITO) film.
Electronic ink layer includes electrophoresis liquid and the electrification ink particle 6 in electrophoresis liquid, under electric field action, electrification oil
Black particle can move in electrophoresis liquid.The color of all electrification ink particles is identical, can be any one color, all electrifications
The charge of ink particle institute band is identical, can be positive charge or negative electrical charge.
Below by taking all electrification ink particles 6 are positively charged black ink particle as an example, to embodiment of the present invention
Electrophoretic display device, EDD be described in detail.
In the first embodiment of the invention, third electrode 9 can be acted on first electrode 7 it is identical, and with first
About 7 electrode is arranged in a one-to-one correspondence, as shown in Figs. 7-8.For example, when third electrode 9 applies 0V voltage, the application of second electrode 8-
10V~-20V voltage, when forming electric field between the two, positively charged ink particle 6 can be moved to second electrode 8, bright to realize
State, as shown in Figure 7.If you need to form dark-state, backward voltage only need to be applied, as shown in figure 8, details are not described herein again.Third electricity
Pole 9 can be transparent electrode or non-transparent electrode, for example transparent electrode, then need to be arranged reflecting layer, and reflecting layer color with it is black
Color contrast is larger, to show the color of illuminated state；For example non-transparent electrode, can using have and the larger reflecting effect of black contrast
Metal or non-metal electrode etc., third electrode 9 is not only as providing the electrode of electric field at this time, but also as reflecting layer.Due to first
Electrode 7 and third electrode 9 are to be intervally arranged, and colour mixture is not susceptible between pixel.In addition, giving first electrode 7 and third electrode 9
Apply identical voltage, also will form weak electric field between the most edge and second electrode 8 of first electrode 7, have a small amount of oil
Black particle moves between, shortens the motion profile of this some particles, for accelerating the movement speed of whole ink particle
Degree provides help.
In second of embodiment of the invention, third electrode 9 can also be acted on second electrode 8 it is identical, and with
Two about 8 electrodes are arranged in a one-to-one correspondence, as shown in Fig. 9-Figure 10.For example, work as 9 application -10V of third electrode~-20V voltage, the
Two electrodes 8 apply 0V voltage, and when forming electric field between the two, positively charged ink particle 6 can be moved to third electrode 9, with reality
Existing illuminated state, as shown in Figure 9.If you need to form dark-state, backward voltage only need to be applied, as shown in Figure 10, details are not described herein again.It should
Under structure, third electrode 9 is served only for providing electric field, aids in display, can be transparent electrode or non-transparent electrode.Due to
One electrode 7 and second electrode 9 alternate arrangement, therefore, colour mixture are not susceptible between pixel.In addition, to first electrode 7 and the
Three electrodes 9 apply identical voltage, also will form weak electric field between the most edge and second electrode 8 of first electrode 7, have
A small amount of ink particle moves between, shortens the motion profile of this some particles, for accelerating whole ink particle
Movement velocity provides help.
In the third embodiment of the invention, as described in Figure 11, the second electrode lay further includes multiple 4th electrodes 10,
Multiple third electrodes 9 and the arrangement of multiple 4th electrode, 10 alternate intervals, projected area of the third electrode 9 in the second substrate are greater than
Projected area of 4th electrode 10 in the second substrate, and face is arranged one by one for third electrode 9 and first electrode 7, the 4th electrode
10 with second electrode 8 one by one face be arranged.
In the structure, third electrode 9 is identical as the effect of first electrode 7, as pixel electrode, is used for display pixel face
Color, the 4th electrode 10 is identical as the effect of second electrode 8, auxiliary to store or discharge electrification ink particle 6 for providing electric field
First electrode 7 and third electrode 9 is helped to develop the color.Apply a voltage to first electrode 7 and third electrode 9, to second electrode 8
With the 4th electrode 10 apply another voltage, two voltage differences make to form two-way electric field between two electrode layers, are located at
Between electrification ink particle 6 can select distance it is nearest and with itself opposite polarity electrode movement, be finally gathered in jointly
In bright first electrode 7 and third electrode 9, first electrode 7 and third electrode 9 is set to show a kind of color, or be gathered in jointly
In second electrode 8 and the 4th electrode 10, first electrode 7 and third electrode 9 is made to show another color.Since ink particle can be to
It is mobile above or downwards to select its shortest path, reduces moving distance, and then improve response speed.
Under the premise of being capable of providing electric field, similarly with second electrode 8, in order not to interfere first electrode 7 and third electrode 9
Color developing effect, the size of the 4th electrode 10 should be reduced as far as possible, make perspective plane of the 4th electrode 10 in the second substrate
Product is less than projected area of the third electrode 9 in the second substrate.4th electrode 10 is identical as second electrode, preferably strip shaped electric poles,
The shape processing simple process.Third electrode 9 can be transparent electrode or non-transparent electrode, for example transparent electrode, then need to set
Reflecting layer is set, and reflecting layer color and black contrast are larger, to show the color of illuminated state；For example non-transparent electrode can use
With the metal or non-metal electrode etc. with the larger reflecting effect of black contrast, third electrode 9 is both as offer electric field at this time
Electrode, and as reflecting layer.
For example, as shown in figure 11, first substrate is upper substrate 1, and there are three first electrode 7 and four for alternate intervals setting
A second electrode 8, the second substrate are lower substrate 2, and there are three third electrode 9 and four the 4th electrodes 10 for alternate intervals setting.On
The corresponding pixel unit of the first electrode 7 and third electrode 9 of lower position face.First electrode 7 is transparent electrode.If three
First electrode 7 and three third electrodes 9 apply 0V voltage, and four second electrodes 8 and four the 4th electrodes 10 apply -10
~-20V voltage, then positively charged ink particle 6 can be mobile to the second electrode 8 nearest from itself or the 4th electrode 10 respectively,
Until all ink particles 6 are all gathered in second electrode 8 and the 4th electrode 10, at this time in first electrode 7 and third electrode 9
There is no ink particle to block, illuminated state (reflecting layer color) is presented in three pixel units, as shown in figure 12.If three first electrodes
7 and three third electrodes 9 apply -10~-20V voltage, four second electrodes 8 and four the 4th electrodes 10 apply 0V electricity
Pressure, then positively charged ink particle 6 can be mobile to the first electrode 7 nearest from itself or third electrode 9 respectively, until all
Ink particle 6 is all distributed in first electrode 7 and third electrode 9, does not have ink particle on second electrode 8 and the 4th electrode 10,
Dark-state (black) is presented in three pixel units at this time, as shown in figure 13.First electrode 7 or second electrode on same substrate
8 can also apply different voltages, so that three pixel units show different states, for example, as shown in figure 14, a left side for upper substrate
Side first electrode and right side first electrode apply+10~+20V voltage, and intermediate first electrode applies -10~-20V voltage, and four
A second electrode applies 0V voltage.The voltage of each electrode of lower substrate electrode voltage corresponding with upper substrate is consistent.At this point,
The electrification ink particle of first pixel unit can be to the second electrode and the 4th electrode movement of upper and lower, the band of the second pixel unit
Electric ink particle can be to the first electrode and third electrode movement of upper and lower, and the electrification ink particle of third pixel unit can be upward
The second electrode of lower section and the 4th electrode movement, therefore illuminated state, dark-state, illuminated state are successively presented from left to right, as shown in figure 14.
In other illustrative embodiments, ink particle 6 can also be negatively charged, it is only necessary to adjust respective electrode voltage
What is be worth is positive and negative.Similarly, ink particle 6 is also possible to other colors, and two kinds of colors can be presented with reflecting layer color difference
State.Color difference is bigger, displays contrast and is more obvious.The present invention does not carry out special limit to ink particle color and reflectance coating color
It is fixed.
In addition, it will be appreciated by persons skilled in the art that first electrode 7, second electrode in the illustrative embodiments
8, the number of third electrode 9 and the 4th electrode 10 is merely illustrative, and in other embodiments, the number of each electrode may be it
His quantity.The electrode of each pixel unit can also apply other voltages, to form other displays for being different from embodiment of above
State will not enumerate herein.The size of voltage is related to charge-mass ratio, the electrophoresis liquid ingredient of electrification ink particle 6 etc., can root
It is adjusted according to concrete condition.
In this illustrative embodiments, electrophoretic display device, EDD further includes the reflecting layer 4 being separately provided, such as Fig. 7-Figure 14 institute
Show, reflecting layer 4 can be set to side of the second substrate far from the second electrode lay, i.e., on the outside of the second substrate, can apply on reflecting layer 4
The coating larger and with high reflectivity with black color difference is covered, such as white, green, blue lamp.For example, when the second electrode lay includes
When third electrode 9 and four electrodes 10, when black ink particle 6 is respectively positioned on second electrode 8 and four electrodes 10, due to first
Electrode 7 and third electrode 9 are transparent electrode, and pixel unit can show reflecting layer coating color.If third electrode 9 is opaque electricity
Pole, then the color of its own institute's band will affect the reflecting effect in reflecting layer 4, and then influence display image quality.Therefore, by third electrode
9 are set as transparent electrode, it can be ensured that display effect.When the second electrode lay only includes third electrode 9, and third electrode 9 and
When one electrode 7 is identical, influence of the third electrode 9 to display effect similarly, therefore, preferably also transparent electrode.Third electrode 9 can
Using material identical with first electrode 7, processing easy to produce.
In this illustrative embodiments, at least one in second electrode 8 and the 4th electrode 10 is transparent electrode.Second electricity
The effect of pole 8 and the 4th electrode 10 is to provide electric field so that ink particle carries out electrophoresis, is being realized using transparent conductive material
Reduce second electrode 8 and the 4th electrode 10 while electrophoresis in illuminated state to the influence of reflecting effect, ensures display
Effect.Material identical with first electrode 7, processing easy to produce can also be used in second electrode 8 and the 4th electrode 10.
In this illustrative embodiments, projection of the first electrode 7 in the second substrate is overlapped with third electrode 9, and the
Projection of two electrodes 8 in the second substrate is overlapped with the 4th electrode 10.Specifically, the shape of first electrode 7, size and third
Electrode 9 is consistent, and shape, the size of second electrode 8 are consistent with the 4th electrode 10, can up and down when ink particle 6 moves as a result,
Even distribution, the display effect to guarantee illuminated state, dark-state is consistent, and can guarantee that field distribution is uniform, it is ensured that adjacent pixel will not phase
Mutually influence.
In this illustrative embodiments, the width of strip shaped electric poles can be designed at 20 μm hereinafter, naked eyes are invisible.Length
It can be according to the size matched design of first electrode 7 and third electrode 9.As shown in fig. 6, the shape of first electrode 7 and third electrode 9
It can be strip shaped electric poles, as shown in Figure 10 Figure 14, the width of first electrode 7 and third electrode 9 is greater than second electrode 8 and the 4th
Electrode 10, length is shown according to pixel unit requires design.
Further, in this illustrative embodiments, the width of second electrode 8 and the 4th electrode 10 is preferably 2~6 μ
m.If width is less than 2 μm, it is difficult to enough electrification ink particles are stored, if width is greater than 6 μm, the ink particle face of storage
Color will affect reflecting effect when illuminated state, which also will affect the size of first electrode 7 and third electrode 9, and then influence aobvious
Show effect.
Further, in this illustrative embodiments, the width of first electrode 7 and third electrode 9 is preferably 80~120
μm.If width less than 80 μm, will affect pixel unit display effect, there is phenomena such as display is unintelligible.If width is greater than 120 μ
M then will increase cost.
Further, in this illustrative embodiments, as shown in Fig. 6-Fig. 9, adjacent first electrode 7 and second electrode
There is the first gap between 8, there is the second gap, the first gap and second between adjacent third electrode 9 and the 4th electrode 10
The width in gap is equal, i.e., second electrode 8 is located at two 7 middle positions of first electrode, and the 4th electrode 10 is located at two third electricity
9 middle position of pole prevents display uneven to guarantee that electrification ink particle can uniformly two pixel regions be mobile to the left and right.
The width in the first gap and the second gap is preferably 4~8 μm.If gap is less than 4 μm, processing technology is more demanding, will increase and adds
Work cost.Gap is greater than 4 μm, then will affect the reflecting effect of illuminated state, and then influence display effect.
Using first substrate as upper substrate in embodiment of above, the second substrate is lower substrate, in other embodiments,
Can also be using first substrate as lower substrate, the second substrate is upper substrate, and the principle of each electrode arrangement is identical, and details are not described herein again.
A kind of manufacturing method of electrophoretic display device, EDD of the invention is illustrated below:
First electrode layer is formed on the first substrate, and first electrode layer can pass through the processes shape such as photoetching or sputtering
At.It, can step completion if first electrode 7 and second electrode 8 use same material.Similarly, is formed in the second substrate
Two electrode layers, the second electrode lay can also be formed by processes such as photoetching or sputterings.When the second electrode lay includes third electricity
When pole 9 and four electrodes 10, same material is can be used in third electrode 9 and the 4th electrode 10, is completed convenient for a step.
Then, electronic ink layer is formed by instillation technique on the wherein electrode layer of a substrate.
Finally, box is arranged in first substrate and the second substrate, electronic ink layer is made to be located at first electrode layer and the second electricity
Between the layer of pole.
The above method is a kind of manufacturing method of electrophoretic display device, EDD of the present invention, and those skilled in the art can be using each
Kind technique manufactures the electrophoretic display device, EDD, for example, it is also possible to after two substrates are to box, by electric ink by the way of perfusion
It is poured into box body and forms electronic ink layer.The present invention does not carry out particular determination to this.
Embodiment of the present invention also provides a kind of driving method of electrophoretic display device, EDD, for driving above-mentioned electrophoretic display device (EPD)
Part, driving method are different according to the structure of electrophoretic display device, EDD.
When the electrophoretic display device, EDD structure as shown in Figs. 7-8, the second electrode lay only includes third electrode 9, and third
Electrode 9 acts on identical with first electrode 7, and when being arranged in a one-to-one correspondence with about 7 first electrode, which includes:
Apply first voltage to first electrode 7 and third electrode 9, apply second voltage to second electrode 8, first voltage with
Second voltage is different, and being gathered in the electrification ink particle 6 of electronic ink layer in first electrode 7 and third electrode 9, (major part is all
On third electrode 9) so that first electrode 7 and third electrode 9 show first state；
Apply tertiary voltage to first electrode 7 and third electrode 9, apply the 4th voltage to second electrode 8, tertiary voltage with
4th voltage is different, so that the electrification ink particle 6 of electronic ink layer is gathered in second electrode 8, with first electrode 7 and third
Electrode 9 shows the second state.
When the structure of the electrophoretic display device, EDD is as shown in Fig. 9-Figure 10, the second electrode lay only includes third electrode 9, and third
Electrode 9 acts on identical with second electrode 8, and when being arranged in a one-to-one correspondence with about 8 second electrode, which includes:
Apply first voltage to first electrode 7, apply second voltage to second electrode 8 and third electrode 9, first voltage with
Second voltage is different, and being gathered in the electrification ink particle 6 of electronic ink layer in second electrode 8 and third electrode 9, (major part is all
On third electrode 9) so that first electrode 7 shows first state；
Apply tertiary voltage to first electrode 7, apply the 4th voltage to second electrode 8 and third electrode 9, tertiary voltage with
4th voltage is different, so that the electrification ink particle 6 of electronic ink layer is gathered in first electrode 7, so that first electrode 7 is shown
Second state.
When the structure of the electrophoretic display device, EDD is as shown in Figure 10-Figure 14, i.e., the second electrode lay further includes multiple 4th electricity
Pole 10, multiple third electrodes 9 and the arrangement of multiple 4th electrode, 10 alternate intervals, perspective plane of the third electrode 9 in the second substrate
Product is greater than projected area of the 4th electrode 10 in the second substrate, and face is arranged one by one for third electrode 9 and first electrode 7, the
Face is arranged four electrodes 10 one by one with second electrode 8.At this point, driving method includes:
Apply first voltage to first electrode 7 and third electrode 9, and applies second to second electrode 8 and the 4th electrode 10
Voltage, first voltage is different from second voltage, so that the electrification ink particle 6 of electronic ink layer is gathered in first electrode 7 and
On three electrodes 9, so that first electrode 7 and third electrode 9 show first state；
Apply tertiary voltage to first electrode 7 and third electrode 9, and applies the 4th to second electrode 8 and the 4th electrode 10
Voltage, tertiary voltage is different from the 4th voltage, so that the electrification ink particle 6 of electronic ink layer is gathered in second electrode 8 and
On four electrodes 10, so that first electrode 7 and third electrode 9 show the second state.
The associated description of driving method illustrated referring to electrophoretic display device, EDD.With the driving of above-mentioned electrophoretic display device, EDD
For, first state indicates that dark-state, the second state indicate illuminated state herein.For example, to allow three pixel units of Figure 14 by it is left extremely
It is right that illuminated state, dark-state, illuminated state is successively presented, first voltage+10~+20V, second voltage can be applied to the first pixel unit of left side
0V；Intermediate second pixel unit applies tertiary voltage -10~-20V, the 4th voltage 0V；Right side third pixel unit applies first
Voltage+10~+20V, second voltage 0V.Allow three pixel units that dark-state, illuminated state, dark-state is successively presented again from left to right, it can
To apply tertiary voltage -10~-20V, the 4th voltage 0V to the first pixel unit of left side；Intermediate second pixel unit applies first
Voltage+10~+20V, second voltage 0V；Right side third pixel unit applies tertiary voltage -10~-20V, the 4th voltage 0V.
In other embodiments, first state and the second state also can be interchanged.The electricity of first voltage and second voltage
Pressure value can also be configured according to the charge condition of ink particle.In addition, same display is being presented in different pixel units
When state, corresponding voltage value be may be the same or different, for example, illuminated state, one of picture is all presented in two pixel units
The first voltage of plain unit can be set to+10~+20V, and second voltage is set as 0V, and the first voltage of another pixel unit can
To be set as 0V, second voltage is set as -10~-20V.Can also two pixel units first voltage be disposed as+10~+
20V, second voltage are disposed as 0V.Specific setting is advisable with controlling simplicity.The present invention does not carry out particular determination to this.
Embodiment of the present invention also provides a kind of electrophoretic display apparatus, including above-mentioned electrophoretic display device, EDD.The display device
It can be used in the displays of various electronic equipments such as mobile phone, computer, e-book, electronics price tag, billboard.Display of the invention
Device shows that the image quality of picture is clear, and fast response time, low in energy consumption.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures
On, or refer to that certain structure is " direct " and be arranged in other structures, or refer to that certain structure is arranged by the way that another structure is " indirect " in other knots
On structure.
Term "one", " one ", "the", " described " and "at least one" be to indicate that there are one or more elements/groups
At part/etc.；Term " comprising " and " having " is to indicate the open meaning being included and refer in addition to listing
Element/component part/also may be present except waiting other element/component part/etc..
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended
Claim is pointed out.
Claims (13)
1. a kind of electrophoretic display device, EDD characterized by comprising
First substrate；
The second substrate is oppositely arranged with the first substrate；
First electrode layer is set to the first substrate close to the surface of the second substrate, including the more of alternate intervals arrangement
A first electrode and multiple second electrodes, the projected area of the first electrode on the first substrate are greater than the second electrode and exist
Projected area on the first substrate, and the first electrode is transparent electrode；
The second electrode lay, is set to the second substrate close to the surface of the first substrate, including be intervally arranged multiple
Three electrodes；
Electronic ink layer, between the first electrode layer and the second electrode lay.
2. electrophoretic display device, EDD according to claim 1, which is characterized in that the multiple third electrode and the multiple the
Face is arranged one electrode one by one, or, face is arranged one by one for the multiple third electrode and the multiple second electrode.
3. electrophoretic display device, EDD according to claim 1, which is characterized in that the second electrode lay further includes multiple four
Electrode, the multiple third electrode and the arrangement of multiple 4th electrode alternate intervals, throwing of the third electrode in the second substrate
Shadow area is greater than the projected area of the 4th electrode on the second substrate, and the third electrode and the first electrode
Face is arranged one by one, and face is arranged one by one for the 4th electrode and the second electrode.
4. electrophoretic display device, EDD according to claim 2 or 3, which is characterized in that the third electrode is transparent electrode；Institute
State electrophoretic display device, EDD further include:
Reflecting layer, the side set on the second substrate far from the second electrode lay.
5. electrophoretic display device, EDD according to claim 3, which is characterized in that in the second electrode and the 4th electrode at least
One is transparent electrode.
6. electrophoretic display device, EDD according to claim 3, which is characterized in that the first electrode is on the second substrate
Projection be overlapped with the third electrode, and the projection of the second electrode on the second substrate and the 4th electrode weight
It closes.
7. electrophoretic display device, EDD according to claim 6, which is characterized in that the second electrode and the 4th electrode are strip
Electrode.
8. electrophoretic display device, EDD according to claim 7, which is characterized in that the width of the second electrode and the 4th electrode
It is 2~6 μm.
9. electrophoretic display device, EDD according to claim 7, which is characterized in that the width of the first electrode and third electrode
It is 80~120 μm.
10. electrophoretic display device, EDD according to claim 7, which is characterized in that the adjacent first electrode and the second electricity
There is the first gap between pole, there is the second gap, first gap between the adjacent third electrode and the 4th electrode
Width with second gap is 4~8 μm.
11. a kind of electrophoretic display apparatus, which is characterized in that including electrophoretic display device (EPD) of any of claims 1-10
Part.
12. a kind of driving method of electrophoretic display device, EDD, for driving the described in any item electrophoretic display device (EPD)s of claim 1-10
Part, which is characterized in that the driving method includes:
Apply first voltage to the first electrode, Xiang Suoshu second electrode applies second voltage, and Xiang Suoshu third electrode applies
First voltage or second voltage, the first voltage is different from second voltage, so that the electrification ink particle of the electronic ink layer
Son is gathered on the third electrode and electrode identical with the third electrode voltage, to show first state；
Apply tertiary voltage to the first electrode, Xiang Suoshu second electrode applies the 4th voltage, and Xiang Suoshu third electrode applies
Tertiary voltage or the 4th voltage, the tertiary voltage is different from the 4th voltage, so that the electrification ink particle of the electronic ink layer
Son is gathered on the electrode different from the third electrode voltage, to show the second state.
13. the driving method of electrophoretic display device, EDD according to claim 12, which is characterized in that the electrophoretic display device, EDD
It further include multiple 4th electrodes, the multiple third electrode and the arrangement of multiple 4th electrode alternate intervals, the third electrode exist
Projected area in the second substrate is greater than the projected area of the 4th electrode on the second substrate, and the third electrode
Face is arranged one by one with the first electrode, and face is arranged one by one for the 4th electrode and the second electrode；The driving side
Method includes:
Apply first voltage to the first electrode and the third electrode, and is applied to the second electrode and the 4th electrode
Add second voltage, the first voltage is different from second voltage, so that the electrification ink particle of the electronic ink layer is gathered in
In the first electrode and the third electrode, to show first state；
Apply tertiary voltage to the first electrode and the third electrode, and is applied to the second electrode and the 4th electrode
Add the 4th voltage, the tertiary voltage is different from the 4th voltage, so that the electrification ink particle of the electronic ink layer is gathered in
In the second electrode and the 4th electrode, to show the second state.
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