CN106154538B - The method of ink is filled in a kind of electric moistening display - Google Patents
The method of ink is filled in a kind of electric moistening display Download PDFInfo
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- CN106154538B CN106154538B CN201610654049.8A CN201610654049A CN106154538B CN 106154538 B CN106154538 B CN 106154538B CN 201610654049 A CN201610654049 A CN 201610654049A CN 106154538 B CN106154538 B CN 106154538B
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- template
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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
Abstract
The invention belongs to electric moistening display fields, disclose controllable ink fill method in a kind of electric moistening display, specifically includes the following steps: S1, one template of preparation, the template is equipped with sunk structure corresponding with pixel wall pattern, the width of the template convex portion is less than the width of single display area, and the width of the template depressed section is greater than pixel wall width；S2, the depressed section of template is covered in the pixel wall of lower substrate, but is not contacted with pixel wall, ink injected by one end, ink enters the gap between template and lower substrate；S3, lift-off stencil inject polar solvent, are packaged.The present invention with template gives the filling ink of determined volume to control the level of ink in pixel compartments, can be with Precise Control of Oil ink level, and level of ink is independent of pixel wall height；To be controlled for the level of ink of flexible display and common electric moistening display；And it can prevent ink from climbing over the walls.
Description
Technical field
The invention belongs to electric moistening display field, controllable ink fill method in specifically a kind of electric moistening display.
Background technique
Electrowetting display device includes fluid chamber and electrode structure, and wherein fluid chamber includes nonconducting first fluid
(alkane etc.), conductive second fluid (water or salting liquid), fluid contacts with each other and immiscible.Such as patent CN 102792207
A describes a kind of electrowetting display device, it includes two support plates, i.e. upper and lower base plate, and wall pattern is provided on lower substrate
That is pixel wall, pixel wall surround pixel compartments, and the region in pixel compartments is display area, and display area is disposed with hydrophobic insulant
Matter, for ink because its hydrophobicity is filled in drain insulating layer, the displaying principle of electrowetting display device is exactly that powering state is hydrophobic
Insulant qualitative change is hydrophilic to become aggregation by sprawling so as to cause ink, and then causes the variation of display area light and shade.
Several existing ink fill methods are described in 104932096 A of patent CN, filling speed is fast, but because adopting
Control the height of ink with the height of pixel wall, thus level of ink influenced by pixel wall height it is big.And flexible display
Because, there are processes such as folded bents, being easy to appear the phenomenon that ink is climbed over the walls, it is therefore desirable to change to pixel wall in use process
Into to be suitable in flexible display, such as 105372812 A of patent CN, designing two sections of pixel walls, and upper section pixel wall has
There is higher hydrophily.In addition to this, the height of pixel wall is also required to higher than traditional, to stop climbing over the walls for ink, even
When pixel wall height is sufficiently high, the hydrophily of pixel wall requires to decline, i.e., no longer needs as 105372812 A of patent CN
Two step pixel walls of middle progress arrangement, while when pixel wall is sufficiently high, it is also used as support plate, blocks touching for upper and lower base plate
Touching.When pixel wall height is higher, it is not possible to continue the height for controlling ink using the height of pixel wall, that is, need using one
The new method of kind controls level of ink.
Summary of the invention
The object of the present invention is to provide a kind of methods that ink is filled in electric moistening display.
In order to achieve the above objectives, the invention adopts the following technical scheme:
The method of ink is filled in a kind of electric moistening display, comprising the following steps:
S1, one template of preparation, the template are equipped with sunk structure corresponding with pixel wall pattern, the template convex portion
Width be less than the width of single display area, the width of the template depressed section is greater than pixel wall width；
S2, the depressed section of template is covered in the pixel wall of lower substrate, but is not contacted with pixel wall, by ink by one end
Injection, ink enter the gap between template and lower substrate；
S3, lift-off stencil inject polar solvent, are packaged.
Further, the height of the pixel wall is 1~100 μm.
Further, the template is hydrophilic polymer material of the water drop static contact angle less than 90 degree.
Further, the template is hydrophilic polymer material of the water drop static contact angle less than 70 degree；Most preferably
Be hydrophilic polymer material of the water drop static contact angle less than 50 degree.
Further, the hydrophilic polymer material be the polymer of hydroxyl, it is carboxylic polymer, poly- containing amino
Close object or silicon-oxygen polymer.
Further, the hydrophilic polymer material is dimethyl silicone polymer, polymethyl methacrylate, polyamides Asia
Amine, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polycyclic alkene, polyether sulphone and poly- aryl
Any one of acid esters.
Further, after preparing template, template is placed in hot plate or baking oven and is toasted.
Further, the depressed section of the template has a bulge-structure, and raised height is less than step S2 depressed section
The distance between pixel wall.
Further, in the step S2, ink is filled by way of vacuumizing or being pumped.
Further, the step S3 is carried out in polar solvent or in protective atmosphere.
Further, the polar solvent is ionic liquid, water, salting liquid or liquid metal.
Further, the final height of the ink is 1~10 μm.
The present invention with template gives the filling ink of determined volume to control the level of ink in pixel compartments, can be accurate
Level of ink is controlled, level of ink is independent of pixel wall height；It can be not only used for the oil of the flexible display of high pixel wall
Ink level control can be equally used for the level of ink control of common electric moistening display；And it can prevent ink from climbing over the walls.
Detailed description of the invention
Fig. 1 is the template construct flow chart of one embodiment of the invention；
Fig. 2 is the flow chart that the present invention carries out ink filling using template；
Fig. 3 is the formwork structure and ink filling flow chart of another embodiment of the present invention.
Specific embodiment
The present invention is described further combined with specific embodiments below:
Electrowetting also known as electricity are wet, and the present disclosure applies equally to the fillings of ink in electric wet-type display.
To avoid flexible electric moistening display from being bent, ink is climbed over the walls in folding process, is needed to increase pixel wall, be reached
To 1~100 μm of height, more preferably height is 30~70 μm, and pixel wall height is denoted as hwall。
Because voltage is influenced by quantity of ink, i.e., the ink in single pixel lattice is more, and the voltage of required folding is bigger, therefore
Level of ink is preferably 1~10 μm, and more preferably 1~5 μm, ink is finally highly denoted as hoil。
The method of template control quantity of ink is introduced in detail below
1, template is prepared
The template be soft template, mould material can be various flexible polymer materials, preferred hydrophilic polymer material,
Water drop static contact angle is preferably less than 90 degree, more preferably less than 70 degree, most preferably less than 50 degree, such as the polymerization of hydroxyl
Object, carboxylic polymer, amido polymer or silicon-oxygen polymer.The hydrophilic polymer material is polydimethylsiloxanes
Alkane, polymethyl methacrylate, polyimides, polyethylene terephthalate, polyethylene naphthalate, poly- carbonic acid
Any one of ester, polycyclic alkene, polyether sulphone and poly- aryl acid esters.
Firstly, being patterned in the rigid basements such as glass, silicon wafer using photoetching process or etch process, base is made
The pattern of template, basic mode plate is matched with formwork structure.It is prepared according to photoetching process, the type of the available photoresist of basic mode plate
It is unlimited, positive photoresist, negtive photoresist, such as common SU-8 photoresist.
Then, as shown in Figure 1, the polymer material of plasticity to be poured to the surface for casting from above-mentioned resulting basic mode plate 10, Gu
Change, obtain template 11 so that the pattern of basic mode plate 10 reversely be replicated, the pattern of template 11 is equipped with corresponding with pixel wall pattern
Sunk structure, while considering subsequent pressure oil process, the width w of 11 convex portion of template2Less than the width w of single display area1,
The width w of 11 depressed section of template3Greater than pixel wall width w4。
By taking PDMS as an example, specific preparation process is as follows: PDMS prepolymer and curing agent are carried out with 8~12: 1 mass ratio
Mixing, makes the bubble in mixed liquor floating to surface and is ruptured in the way of vacuumizing；Pour the surface for casting from basic mode plate 10 again, 70
~150 DEG C of 0.5~3h that are heating and curing make PDMS material solidification crosslinking, cooling.During this, by adjusting prepolymer and solidification
The ratio of agent can make PDMS template have certain flexibility, with certain rigidity, adjustment baking temperature while can be bent
Spend the hardness with the time also adjustable PDMS template.
Finally, template 11 is removed from basic mode plate 10, template 11 is obtained.
Hereafter, template can be placed on hot plate or is toasted in baking oven, baking temperature is 90 DEG C, and baking time is
10min, to remove the hydrone etc. of template surface.
2, the ink of object height is obtained using template
Lower substrate includes substrate 15, drain insulating layer 14, pixel wall 13, and the display area that pixel wall 13 surrounds is filled with oil
Ink 12.
As shown in Fig. 2, template 11 is placed in lower substrate surface, it is aligned, i.e. the depressed section of template 11 covers on picture
It on plain wall 13, but is not contacted with pixel wall 13, template convex portion and lower substrate display area distance reach object height h2
When, template depressed section is not contacted with pixel wall, i.e., distance h between the two1> 0.
To guarantee that template 11 is not contacted with pixel wall 13, template 11 needs certain degree of hardness, for example, by PDMS prepolymer and
The ratio of curing agent increases, and perhaps increases the temperature and time of baking or makes template 11 using rigid substance.
Then, ink is injected by one end, by way of vacuumizing or the mode of pump pressure makes ink enter template
Gap between lower substrate.
3, it is molten to inject ionic liquid, water, salting liquid or liquid metal isopolarity into Electrowetting device for lift-off stencil 11
Liquid is packaged.
To guarantee not having in device air, lower substrate is placed in polar solvent after ink injection, lift-off stencil, simultaneously
The injection of polar solvent is realized, and completes encapsulation in polar solvent；Also it can be injected after polar solvent in protective atmosphere (nitrogen
Gas) in carry out.
Final oil film height hoilFor the total ink v of fillingoilWith the ratio of display area area S, i.e. hoil=voil/S。
When the ink of filling does not fill the space between template and lower substrate, as shown in (1) in Fig. 2, total ink
By filling process control.
When the ink of filling fills the space between template and substrate, as shown in (2) in Fig. 2, total ink is template and lower base
The total volume of sheet separation, i.e.,
w1For the width of template convex portion, w2For the width of display area single in lower substrate, w3For template depressed section
Width, w4For pixel wall width, N is the total number of pixel compartments.
In another embodiment, display is entered after the rupture of oil film in order to guarantee template stripping process pixel wall upper surface
Region, as shown in figure 3, the depressed section in template designs a small bulge-structure, raised height h3H need to be met3< h1, ink
12 filling process are identical as the above.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
Knowing the personage of this technology all can carry out modifications and changes to examples detailed above without prejudice under spirit and scope of the invention.Therefore,
Such as those of ordinary skill in the art is completed without departing from the spirit and technical ideas disclosed in the present invention
All equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. filling the method for ink in a kind of electric moistening display, which comprises the following steps:
S1, one template of preparation, the template are equipped with sunk structure corresponding with pixel wall pattern and bulge-structure, and the template is convex
The width for playing part is less than the width of single display area, and the width of the template depressed section is greater than pixel wall width；
S2, the depressed section of template is covered in the pixel wall of lower substrate, but is not contacted with pixel wall, ink is infused by one end
Enter, ink enters the gap between template and lower substrate；
S3, lift-off stencil inject polar solvent between up and down substrate, and then upper and lower substrates are packaged.
2. the method according to claim 1, wherein the height of prime number pixel wall is 1~100 μm.
3. the method according to claim 1, wherein the template is parent of the water drop static contact angle less than 90 degree
Waterborne polymeric material.
4. according to the method described in claim 3, it is characterized in that, the hydrophilic polymer material is the polymerization of hydroxyl
Object, carboxylic polymer, amido polymer or silicon-oxygen polymer.
5. according to the method described in claim 3, it is characterized in that, the hydrophilic polymer material is polydimethylsiloxanes
Alkane, polymethyl methacrylate, polyimides, polyethylene terephthalate, polyethylene naphthalate, poly- carbonic acid
Any one of ester, polycyclic alkene, polyether sulphone and poly- aryl acid esters.
6. the method according to claim 1, wherein the depressed section of the template has a bulge-structure, protrusion
Height be less than the distance between step S2 depressed section and pixel wall.
7. the method according to claim 1, wherein passing through the side for vacuumizing or being pumped in the step S2
Method fills ink.
8. the method according to claim 1, wherein the step S3 is in polar solvent or in protective atmosphere
It carries out.
9. according to the method described in claim 8, it is characterized in that, the polar solvent is ionic liquid, water, salting liquid or liquid
State metal.
10. the method according to claim 1, wherein the final height of the ink is 1~10 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610654049.8A CN106154538B (en) | 2016-08-10 | 2016-08-10 | The method of ink is filled in a kind of electric moistening display |
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|---|---|---|---|
| CN201610654049.8A CN106154538B (en) | 2016-08-10 | 2016-08-10 | The method of ink is filled in a kind of electric moistening display |
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| CN106154538A CN106154538A (en) | 2016-11-23 |
| CN106154538B true CN106154538B (en) | 2019-02-15 |
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Citations (7)
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| CN101881925A (en) * | 2010-06-02 | 2010-11-10 | 中国科学院长春光学精密机械与物理研究所 | Method for copying micro-nano structure on any three-dimensional curve |
| CN202256729U (en) * | 2011-10-25 | 2012-05-30 | 洛阳师范学院 | Liquid zooming lens |
| CN103941390A (en) * | 2013-01-17 | 2014-07-23 | 财团法人工业技术研究院 | Method for manufacturing electrowetting element |
| US20140353157A1 (en) * | 2013-01-09 | 2014-12-04 | Tecan Trading Ag | Disposable cartridge for microfluidics system |
| CN104932096A (en) * | 2015-05-20 | 2015-09-23 | 华南师范大学 | Ink filling equipment and ink filling method for electrofluidic displays |
| CN105372812A (en) * | 2015-11-24 | 2016-03-02 | 华南师范大学 | Flexible electrofluidic display and preparation method thereof |
| CN105572857A (en) * | 2015-12-17 | 2016-05-11 | 华南师范大学 | Electrowetting printing ink filling method, filing device and filling apparatus |
-
2016
- 2016-08-10 CN CN201610654049.8A patent/CN106154538B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881925A (en) * | 2010-06-02 | 2010-11-10 | 中国科学院长春光学精密机械与物理研究所 | Method for copying micro-nano structure on any three-dimensional curve |
| CN202256729U (en) * | 2011-10-25 | 2012-05-30 | 洛阳师范学院 | Liquid zooming lens |
| US20140353157A1 (en) * | 2013-01-09 | 2014-12-04 | Tecan Trading Ag | Disposable cartridge for microfluidics system |
| CN103941390A (en) * | 2013-01-17 | 2014-07-23 | 财团法人工业技术研究院 | Method for manufacturing electrowetting element |
| CN104932096A (en) * | 2015-05-20 | 2015-09-23 | 华南师范大学 | Ink filling equipment and ink filling method for electrofluidic displays |
| CN105372812A (en) * | 2015-11-24 | 2016-03-02 | 华南师范大学 | Flexible electrofluidic display and preparation method thereof |
| CN105572857A (en) * | 2015-12-17 | 2016-05-11 | 华南师范大学 | Electrowetting printing ink filling method, filing device and filling apparatus |
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