CN105425385B - A kind of electric moistening display for controlling ink movement and preparation method thereof - Google Patents
A kind of electric moistening display for controlling ink movement and preparation method thereof Download PDFInfo
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- CN105425385B CN105425385B CN201510848370.5A CN201510848370A CN105425385B CN 105425385 B CN105425385 B CN 105425385B CN 201510848370 A CN201510848370 A CN 201510848370A CN 105425385 B CN105425385 B CN 105425385B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
- G02B26/005—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid based on electrowetting
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
- G02B2207/115—Electrowetting
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention discloses a kind of electric moistening display for controlling ink movement and preparation method thereof, the display includes pixel wall construction, pixel wall construction includes longitudinal wall and longitudinal wall, the top of each longitudinal wall or longitudinal wall offers a groove in the same side, groove extends along the wall, the side of groove and pixel wall construction penetrates through, the material of pixel wall construction is hydrophilic material one, hydrophilic material two is filled with groove, the hydrophily of hydrophilic material two is better than the hydrophilic material one；On the pixel inner wall of all water wetted materials one, ink is pinned at the top of pixel wall construction, and on the pixel inner wall comprising water wetted material two, ink is pinned at the height of water wetted material one and two interface of water wetted material, ink is formd away from the incremental situation in the direction of the pixel inner wall comprising water wetted material two, display of the present invention is by controlling ink highly to control ink to move in pixel unit inner wall pinning.
Description
Technical field
The present invention relates to electric moistening display technical field, more particularly to a kind of electric moistening display for controlling ink movement
And preparation method thereof.
Background technology
Electric moistening display, also referred to as electric wet-type display, are to regulate and control the profit of substrate surface material by controlling voltage
It is moist so as to control ink move Display Technique.With reference to Fig. 1-2, traditional electric moistening display includes first substrate and second
Substrate, first substrate include upper substrate 1 ', upper conductive layer 2 ' and packaging adhesive frame 3 ', and second substrate includes infrabasal plate 6 ', lower conduction
Layer 9 ', insulating layer 8 ', hydrophobic layer 5 ', pixel wall 4 ', are filled with ink 10 ' and electrolyte between first substrate and second substrate
Solution 7 ', wherein, ink 10 ' is filled in the display area 11 ' surrounded by pixel wall 4 '.Electrowetting display pixel cells are opened
The rupture for starting from ink is closed, then forms nonpolar liquid（Ink）/ polar liquid（Water）/ the surface of solids（Hydrophobic layer 5 ', leads to
Often it is fluorinated polymer material, AF1600, AF1600x etc.）Three-phase line of contact, the contact line simultaneously move hair under electric field force effect
The difference for opening up corresponding ink contraction state forms the pixel unlatching on optical significance and the effect of gray scale.Especially, to display
Part will obtain good optical display effect, it is necessary to reliably be controlled to the position and the direction of motion of ink rupture when powering up
System.At present, the commonplace method used, is one jiao of formation drive electrode layer in pixel unit with reference to Fig. 1（Such as ITO）'s
Local cavity 12 '（Commonly referred to as notch）；Using the local uneven of extra electric field distribution, realize that ink movement is contracted to pixel
One jiao（Notch positions）.Many experiments and theoretical modeling the result shows that, ink rupture point selection and the most thin position of ink thickness
Preferential generation is put, and the threshold voltage needed for ink rupture depends on the thickness of ink thinnest part；The effect of obvious notch is
The position of the contraction terminal of ink is controlled, the rupture location of ink can not be effectively controlled and reduce the cut-in voltage of pixel.It is heavier
Want, in conductive backings（Such as common ITO electro-conductive glass）During conductive backings are performed etching with manufacture notch, hold
Easily there is irregular jagged edge as shown in the enlarged drawing in Fig. 1, power up drive when, can be because of in jagged edge
Electric field caused by distribution of charges is laid out is uneven, and electric charge can tend to be gathered in irregular conductive tip in electrical measurement, formation
Local high charge density, is very easy to cause the breakdown of insulating layer so that display is damaged.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of electric moistening display for controlling ink movement and its preparation
Method.
The technical solution used in the present invention is：
A kind of electric moistening display for controlling ink movement, including first substrate and second substrate, the first substrate bag
Hydrophobic layer, the pixel wall construction arranged on hydrophobic layer upper surface are included, the pixel wall construction includes multiple horizontal strokes for being mutually perpendicular to intersect
To wall and longitudinal wall, the top of each longitudinal wall or the longitudinal wall offers a groove, institute in the same side
State groove along the wall to extend, the side of the groove and the pixel wall construction penetrates through, the material of the pixel wall construction
Expect for hydrophilic material one, is filled with hydrophilic material two in the groove, the hydrophily of the hydrophilic material two is better than institute
State hydrophilic material one.
Preferably, the hydrophilic material two of filling is flushed with the edge of the pixel wall construction in the groove.
Preferably, the contact angle of the water droplet of the hydrophilic material two is less than or equal to 30 °.
Preferably, the contact angle of the water droplet of the hydrophilic material one is 60 ° ~ 90 °.
Preferably, the cross section of the groove is any of triangle, rectangle, trapezoidal, irregular shape.
Present invention also offers a kind of preparation method of electric moistening display, comprise the following steps：
S1：Hydrophilic material one is coated with hydrophobic layer upper surface, cures, obtains hydrophilic layer one；
S2：A plurality of groove is etched on the hydrophilic layer one, the groove is parallel to each other, and the spacing between the groove is
The length of side of the pixel compartments；
S3：Water wetted material two is coated with the hydrophilic layer one, the water wetted material two fills the groove, cures, obtains
To hydrophilic layer two, the hydrophily of the hydrophilic material two is better than the hydrophilic material one；
S4：It is exposed using the mask plate with pixel wall figure, by the edge of the figure on the mask plate and institute
State the one side edge alignment of groove；
S5：Development；
S6：Fill ink and electrolyte solution, encapsulation.
Preferably, etching removal is further included between the S4 and S5 beyond the described hydrophilic of the height of the hydrophilic layer one
The step of layer two.
Preferably, the S5 develops for a step or two steps are developed.
Preferably, the contact angle of the water droplet of the hydrophilic material two is less than or equal to 30 °.
Preferably, the contact angle of the water droplet of the hydrophilic material one is 60 ° ~ 90 °.
The beneficial effects of the invention are as follows：The present invention provides a kind of electric moistening display for controlling ink movement and its preparation
Method, the display include first substrate and second substrate, and the first substrate includes hydrophobic layer, arranged on hydrophobic layer upper surface
Pixel wall construction, the pixel wall construction includes multiple longitudinal walls and longitudinal wall for being mutually perpendicular to intersect, each described
The top of longitudinal wall or the longitudinal wall offers a groove in the same side, and the groove extends along the wall, institute
The side for stating groove and the pixel wall construction penetrates through, and the material of the pixel wall construction is hydrophilic material one, the groove
Interior to be filled with hydrophilic material two, the hydrophily of the hydrophilic material two is better than the hydrophilic material one；By in pixel
The longitudinal wall of wall construction or the top of longitudinal wall offer a groove in the same side, and hydrophilic material two is filled in groove,
Since hydrophilic material one is different with the ink wetability of hydrophilic material two, the pixel inner wall of all water wetted materials one
On, ink is pinned at the top of pixel wall construction, and on the pixel inner wall comprising water wetted material two, ink is pinned at hydrophilic material
The height of material one and two interface of water wetted material, that is, form ink away from the pixel inner wall comprising water wetted material two
The incremental situation in direction, after application of a voltage, ink can take the lead in rupturing in the position of thickness minimum, and away from comprising hydrophilic
The direction of the pixel inner wall of material two is shunk, and display of the present invention is by controlling ink in pixel unit inner wall pinning
Highly the ink is controlled to move.Display of the present invention can be realized to electricity in the case where not changing electric field distribution substantially
Effective control of ink rupture location under display pixel cells power-up condition, ink movement shrinkage direction is soaked, since ink is broken
The thickness that required threshold voltage depends on ink thinnest part is split, display of the present invention can effectively reduce pixel unlatching
Threshold voltage, can also effectively avoid notch design methods from puncturing risk due to insulating layer caused by local high charge density.
Brief description of the drawings
Fig. 1 is the sectional view of conventional electric moistening display；
Fig. 2 is the pixel wall structure chart of conventional electric moistening display；
Fig. 3 is the sectional view of the electric moistening display of no applied voltage time control liquefaction ink movement；
Fig. 4 is the top view of the electric moistening display first substrate of no applied voltage time control liquefaction ink movement；
Fig. 5 is the top view for the electric moistening display first substrate for applying the ink movement of voltage time control liquefaction；
Fig. 6 in order to control ink movement electric moistening display preparation flow figure.
Embodiment
Carried out clearly below with reference to the technique effect of the design of embodiment and attached drawing to the present invention, concrete structure and generation
Chu, be fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright part of the embodiment, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art is not paying
The other embodiment obtained on the premise of creative work, belongs to the scope of protection of the invention.In addition, arrived involved in patent
All connection/connection relations, not singly refer to component and directly connect, and refer to can according to specific implementation situation, by addition or
Couple auxiliary is reduced, to form more preferably draw bail.Each technical characteristic in the invention, in not conflicting conflict
On the premise of can be with combination of interactions.
With reference to Fig. 3, the present invention provides a kind of electric moistening display for controlling ink movement, electric moistening display is also referred to as
Electric wet-type display, the present disclosure applies equally to electric wet-type display, the display includes first substrate and second substrate, institute
Stating first substrate includes infrabasal plate 5, conductive layer 10, hydrophobic layer 4, the pixel wall construction 3 arranged on 4 upper surface of hydrophobic layer, the picture
Plain wall construction 3 includes multiple longitudinal walls and longitudinal wall for being mutually perpendicular to intersect, each longitudinal wall or the longitudinal direction
The top of wall offers a groove 11 in the same side, and the groove 11 extends along the wall, the groove 11 with it is described
The side perforation of pixel wall construction 3, the material of the pixel wall construction 3 is hydrophilic material one, is filled with the groove 11
Hydrophilic material 28, the hydrophily of the hydrophilic material 28 are better than the hydrophilic material one.The second substrate includes
Upper substrate 1, conductive layer 6 and packaging adhesive frame 2, first substrate and the second substrate central filler have electrolyte solution 7 and ink
9, the ink 9 is filled in the pixel compartments.The first substrate and second substrate are by the packaging adhesive frame 3 by the electricity
Electrolyte solution 7 and ink 9 are sealed between first substrate and second substrate.
With reference to Fig. 4, Fig. 4 is the top view of the electric moistening display first substrate of no applied voltage time control liquefaction ink movement,
In a preferred embodiment, the groove 11 extends along the wall, the hydrophilic material of filling in the groove 11
28 flush with the top edge and lateral edges of the pixel wall construction 3.The contact angle of the water droplet of the hydrophilic material 28 is small
In equal to 30 °.The contact angle of the water droplet of the hydrophilic material one is 60 ° ~ 90 °.The cross section of the groove 11 can be any
Shape, such as triangle, rectangle, trapezoidal, irregular shape.In Fig. 4, no applied voltage, ink spreading in pixel compartments, due to
Hydrophilic material one is different with the ink wetability of hydrophilic material 28, in that side pixel wall of all water wetted materials one
On wall, ink 9 is pinned at the top of pixel wall construction 3, and on that side pixel inner wall comprising water wetted material 28, ink 9
The height of water wetted material one and 28 interface of water wetted material is pinned at, that is, forms ink 9 away from comprising water wetted material two
The incremental situation in the direction of 8 that side pixel inner wall, after application of a voltage, ink 9 can take the lead in the position of thickness minimum
Rupture, and shunk away from the direction of that side pixel inner wall comprising water wetted material 28, display of the present invention is
By controlling ink 9 highly to control 9 rupture location of ink and ink 9 to move in pixel unit inner wall pinning.It is of the present invention
Display can be realized to ink under electrowetting display pixel cells power-up condition in the case where not changing electric field distribution substantially
9 rupture locations, ink 9 move effective control of shrinkage direction, and ink 9 is depended on since ink 9 ruptures required threshold voltage
The thickness of thinnest part, so display of the present invention can effectively reduce the threshold voltage of pixel unlatching, traditional electrowetting is shown
The threshold voltage for showing device is 24V ~ 26V, and the driving voltage that aperture opening ratio reaches 60% is 35V or so, using electrowetting of the present invention
The threshold voltage of display is down to below 15V, and the driving voltage that aperture opening ratio reaches 60% is that more traditional electrowetting is shown within 25V
Device, its threshold voltage significantly reduce.In addition, electric moistening display of the present invention need not prepare notch, can also effectively keep away
Exempt from notch design methods since insulating layer caused by local high charge density punctures risk.
With reference to Fig. 5, Fig. 5 is the top view for the electric moistening display first substrate for applying the ink movement of voltage time control liquefaction,
When applying voltage, ink 9 takes the lead in rupturing in the position of thickness minimum, i.e., in the pixel that includes the hydrophilic material 28 of reclining
The position rupture of inner wall, and shunk away from the direction of that side pixel inner wall comprising water wetted material two.The present invention
By controlling ink 9 highly to control 9 direction of motion of 9 rupture location of ink and ink in pixel unit inner wall pinning.
With reference to Fig. 6, present invention also offers the preparation method of electric moistening display as described above, comprise the following steps：
S1：Hydrophilic material one is coated with 4 upper surface of hydrophobic layer, the contact angle of the water droplet of the hydrophilic material one is 60 ° ~ 90 °, heat
Plate solvent flashing cures, and obtains hydrophilic layer 1, and the thickness of the hydrophilic layer 1 is the pixel wall of conventional electric moistening display
The thickness of structure, is 5-8 μm；S2：A plurality of groove 11 is etched on the hydrophilic layer 1, the groove 11 is parallel to each other, institute
The length of side that the spacing between groove 11 is the pixel compartments is stated, dry method etch technology can be used, the dry etch process includes
Sputter etching, reactive ion etching and high density plasma etch technique；S3：Hydrophilic material is coated with the hydrophilic layer 1
Expect 28, the contact angle of the water droplet of the hydrophilic material 28 is less than or equal to 30 °, and the water wetted material 28 fills the groove
11, hot plate cure, obtains hydrophilic layer 2 13, the more hydrophilic layer 1 of 2 13 thickness of hydrophilic layer is more than about 2 μm thin, described hydrophilic
The hydrophily of property material 28 is better than the hydrophilic material one；S4：It is exposed using the mask plate with pixel wall figure,
The edge of figure on the mask plate is alignd with the one side edge of the groove；S5：Development；S6：Fill ink 9 and electrolysis
Matter solution 7, encapsulation.The S5 develops for a step or the development of two steps, can complete to develop according to a kind of developer solution, that is, use
One step is developed, if cannot, need two steps to develop.In a preferred embodiment, between the S4 and the S5, quarter is further included
The step of etching off is removed beyond the hydrophilic layer 2 13 of the height of the hydrophilic layer 1, it is described dry using dry etch process
Method etching technics includes sputter etching, reactive ion etching and high density plasma etch technique.
Claims (9)
1. a kind of electric moistening display for controlling ink movement, including first substrate and second substrate, the first substrate include
Hydrophobic layer, the pixel wall construction arranged on hydrophobic layer upper surface, it is characterised in that the pixel wall construction includes multiple be mutually perpendicular to
The top of the longitudinal wall and longitudinal wall of intersection, each longitudinal wall or the longitudinal wall offers one in the same side
Groove, the groove extend along the wall, and the side of the groove and the pixel wall construction penetrates through, the pixel wall knot
The material of structure is hydrophilic material one, and hydrophilic material two, the hydrophily of the hydrophilic material two are filled with the groove
It is better than the hydrophilic material one, the cross section of the groove is any of triangle, rectangle, trapezoidal, irregular shape.
2. the electric moistening display of control ink movement according to claim 1, it is characterised in that filling in the groove
The hydrophilic material two flushed with the edge of the pixel wall construction.
3. the electric moistening display of control ink movement according to claim 1, it is characterised in that the hydrophilic material
The contact angle of two water droplet is less than or equal to 30 °.
4. the electric moistening display of ink movement is controlled according to claim 1-3 any one of them, it is characterised in that the parent
The contact angle of the water droplet of water-based material one is 60 °~90 °.
It is 5. a kind of such as the preparation method of claim 1-4 any one of them electric moistening displays, it is characterised in that including following
Step：
S1：Hydrophilic material one is coated with hydrophobic layer upper surface, cures, obtains hydrophilic layer one；
S2：A plurality of groove is etched on the hydrophilic layer one, the groove is parallel to each other, and the spacing between the groove is parallel
And the distance between two adjacent described walls；
S3：Water wetted material two is coated with the hydrophilic layer one, the water wetted material two fills the groove, cures, obtains parent
Water layer two, the hydrophily of the hydrophilic material two are better than the hydrophilic material one；
S4：It is exposed using the mask plate with pixel wall figure, by the edge of the figure on the mask plate and the ditch
The one side edge alignment of groove；
S5：Development；
S6：Fill ink and electrolyte solution, encapsulation.
6. preparation method according to claim 5, it is characterised in that it is super that etching removal is further included between the S4 and S5
The step of going out the hydrophilic layer two of the height of the hydrophilic layer one.
7. preparation method according to claim 5, it is characterised in that the S5 develops for a step or the development of two steps.
8. preparation method according to claim 5, it is characterised in that the contact angle of the water droplet of the hydrophilic material two is small
In equal to 30 °.
9. according to claim 5-8 any one of them preparation methods, it is characterised in that the water droplet of the hydrophilic material one
Contact angle is 60 °~90 °.
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| CN201510848370.5A CN105425385B (en) | 2015-11-26 | 2015-11-26 | A kind of electric moistening display for controlling ink movement and preparation method thereof |
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| CN201510848370.5A CN105425385B (en) | 2015-11-26 | 2015-11-26 | A kind of electric moistening display for controlling ink movement and preparation method thereof |
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| CN105425385A CN105425385A (en) | 2016-03-23 |
| CN105425385B true CN105425385B (en) | 2018-04-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106932894A (en) * | 2017-04-20 | 2017-07-07 | 华南师范大学 | It is a kind of to control electric moistening display of ink movement and preparation method thereof |
| CN107367835B (en) * | 2017-08-08 | 2020-06-16 | 华南师范大学 | Electrowetting display and preparation method thereof |
| CN107561688B (en) * | 2017-10-11 | 2020-09-25 | 重庆秉为科技有限公司 | Electrowetting display device provided with pixel wall |
| CN113102193B (en) * | 2021-03-04 | 2022-04-26 | 南昌大学 | Coating machine scraper based on surface hydrophilic and hydrophobic microstructure |
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| CN101495901A (en) * | 2006-06-06 | 2009-07-29 | 利奎阿维斯塔股份有限公司 | Optical apparatus |
| CN103293661A (en) * | 2012-02-24 | 2013-09-11 | 财团法人工业技术研究院 | Electrowetting display element |
| CN104409414A (en) * | 2014-11-19 | 2015-03-11 | 华南师范大学 | Electrowetting support plate with hydrophilic SOG material and preparation method thereof and electrowetting display |
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| CN103270446B (en) * | 2010-10-29 | 2014-12-17 | 米路塔克控股公司 | Electrowetting optical element |
| JP2013092701A (en) * | 2011-10-27 | 2013-05-16 | Lg Display Co Ltd | Electrowetting display |
| GB201121710D0 (en) * | 2011-12-16 | 2012-02-01 | Samsung Lcd Nl R & D Ct Bv | Electrowetting device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495901A (en) * | 2006-06-06 | 2009-07-29 | 利奎阿维斯塔股份有限公司 | Optical apparatus |
| CN103293661A (en) * | 2012-02-24 | 2013-09-11 | 财团法人工业技术研究院 | Electrowetting display element |
| CN104409414A (en) * | 2014-11-19 | 2015-03-11 | 华南师范大学 | Electrowetting support plate with hydrophilic SOG material and preparation method thereof and electrowetting display |
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