CN103091926B - Electrophoresis showed component, electrophoretic display device (EPD) and preparation method thereof - Google Patents
Electrophoresis showed component, electrophoretic display device (EPD) and preparation method thereof Download PDFInfo
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- CN103091926B CN103091926B CN201310047908.3A CN201310047908A CN103091926B CN 103091926 B CN103091926 B CN 103091926B CN 201310047908 A CN201310047908 A CN 201310047908A CN 103091926 B CN103091926 B CN 103091926B
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Abstract
The invention belongs to electrophoresis showed fields, and in particular to a kind of electrophoresis showed component including transparent first electrode, and is attached to the photoelectric medium of the first electrode side；The photoelectric medium has microcapsules and adhesive, and the microcapsules are scattered among the adhesive and are fixed by the adhesive；A plurality of types of particles for including suspension in the microcapsules and being dispersed in the suspension, each type of particle has several, the particle of wherein at least one type can migrate under the action of electric field, generally two layers of the arrangement of the microcapsules in the photoelectric medium.The disadvantages of arrangement of bilayered microcapsule not only avoids application difficulties existing for existing Single-layer microcapsules, and yields is low, and photoelectric properties are poor, and improve the effective display area of electrophoretic display device (EPD).
Description
Technical field
The present invention relates to a kind of display component and display, especially a kind of electrophoretic display device (EPD) and this aobvious for producing
Show the method and component of device.
Background technique
Electrophoretic display device (EPD) refers to that a kind of effect using electric field moves multiple charged particles therein in suspension
It moves to change the display of the optical states of its viewing surface.Compared with liquid crystal display, this display has satisfactory
Brightness, high contrast, wide viewing angle, bistable state and low-power consumption characteristic and have been favored by people, by lasting for many years
Research work has been achieved for significant progress.The meaning that there is above-mentioned " bistable state " it to be known in the art, refers to packet
Display containing display original set has the display state of at least one optical characteristics.
However, pass through years of researches to electrophoretic display device (EPD) and application, it has been found that electrophoretic display device (EPD) is in picture quality
The shortcomings that related aspect, and these disadvantages have seriously hampered their extensive use.For example, the reunion of particle is asked
Topic, dispersed homogeneous degree problem of stable problem and particle of the particle in suspension in suspension.
It is described in the patent or patent application that many has been announced or announced using a large amount of encapsulation
The method of suspension and particle compensates for above-mentioned some technological deficiencies of electrophoretic display device (EPD) to a certain extent.For example, Chinese
Patent CN1477608A provides a kind of micro-capsule composition for electrophoretic display device, improves the long-term steady of electrophoretic display apparatus
It is qualitative, display responsiveness, contrast, display rewritable number.The composition of the invention is containing interior packet electrophoresis in the housing
Property fine particles dispersion liquid in a solvent and the microcapsules of electrophoretic display apparatus that constitute and water solvent, for applying
The composition of the modulation of cloth liquid, above-mentioned composition are obtained without the process of dry microcapsules, micro- glue in above-mentioned composition
The content ratio of capsule is 30~80 weight %.
In addition, OED also achieves many achievements in terms of microcapsules, and had disclosed before research achievement is disclosed in
Among the patent application either announced or patent document.For example, disclosing a kind of micro- glue in Chinese patent CN102809863A
The preparation method of capsule array electrophoresis display component comprising following steps: it a) is made on the transparent substrates with transparency conducting layer
Standby barricade array, the barricade array and substrate constitute several small cavitys；B) it is injected in the target cavity of barricade array
Corresponding electrophoretic display microcapsule.In addition, a kind of electrophoretic display coating fluid is also provided in Chinese patent CN102093785A,
Include microcapsules, includes suspension in microcapsules and multiple charged pigment particles for being scattered in suspension, microcapsules point
It is dispersed in adhesive.The adhesive is dissolved in water obtained, wherein water soluble polymer chemical combination by water-soluble high-molecular compound
The concentration of object is 5%-20%.The weight percent of adhesive and microcapsules is 10%-70%.It is therein micro- when adhesive is dry
Capsule at least one deformation occurs.Wherein, used adhesive effectively reduces the reunion between microcapsules, when dry
It can produce certain shrinkage stress, so that the dispersibility of microcapsules is more preferable, to effectively increase electrophoretic display coating fluid
Photoelectric properties.In another example providing another electrophoretic display coating fluid in Chinese patent 102585676A, it includes have micro- glue
Capsule, these microcapsules are dispersed in adhesive, include suspension in microcapsules and multiple band electrochondrias for being scattered in suspension
Son, charged particle meeting electrophoresis in suspension under the action of electric field；It also include aqueous blue in above-mentioned electrophoretic display coating fluid
The weight percent of color dyestuff, the aqueous blue dyes and electrophoretic display coating fluid is 0.01%-5%.The electrophoresis showed of the invention
The B value of the made display screen come out of coating fluid significantly improves, while mentions the black white contrast of electrophoresis showed also
Height, to effectively improve the photoelectric properties of electrophoretic display coating fluid.
Above-mentioned research work make electrophoretic display device (EPD) stability, in terms of performance obtained to some extent
Improve.However, researcher still from many aspects, multi-angle done many elaborations, it is desirable to be able to further increase electricity
Performance of the phoretic display in terms of image is shown.For example, European patent EP 1010036B1 and its Japanese patent families
JP4460149 provides a kind of electrophoretic display device (EPD) comprising display surface (viewed surface) and the back side (rear
Surface), between display surface and the back side have a polymer array (Polymer Matrix), the polymer array it
In with it is several accommodate suspension and particle caves, wherein the ratio of width to height in cave be greater than 1.2.The patent technology to be solved is asked
Topic is in the case where the coating of single layer capsule, and there are a large amount of gaps between capsule, so that actually active display area becomes smaller.It should
Documents claim can become flat so as to improving its optics by mechanical force or using what the contraction of adhesive made cave
Display performance.
In theory, the cave of flattening can seemingly improve the display of electrophoretic display device (EPD) from the point of view of certain angles
Performance.But from the point of view of the discussion of the patent document, as depicted in figs. 1 and 2, it appears that need for be arranged in cave the structure of single layer
Be possible to achieve the purpose that make by the shrinkage of mechanical force or adhesive the ratio of width to height in " cave " to be greater than 1.2.Although
Microcapsules can be coated into single layer by regulating and controlling the methods of coating speed meticulously in implementing room by researcher, however, for
It is a rather difficult thing in large-scale production application.Even worse, it is also necessary to control these " caves "
Specific location makes " cave " can just fill the gap between adjacent " cave " when deformation, to improve electrophoresis showed
Effective display scale of device, and this is difficult to realize for those skilled in the art.Therefore, as shown in figure 3, single layer
Microcapsules arrangement inevitably between microcapsules there are a large amount of gaps, be likely to cause electrophoretic display device (EPD) instead
Actual effective display area decline.
Summary of the invention
In view of the deficiencies of the prior art, a kind of electrophoresis showed component, and related preparation are to provide for mesh of the invention
Method and electrophoretic display device (EPD).Researcher surprisingly has found, controls the micro- of electrophoretic display device (EPD) by controlling the thickness of coating fluid
Capsule forms generally two layers of arrangement with unexpected good display performance in photoelectric medium.
For this purpose, first aspect present invention provides a kind of electrophoresis showed component, including transparent first electrode, and attachment
Photoelectric medium in the first electrode side；The photoelectric medium has microcapsules and adhesive, and the microcapsules are scattered in
It is fixed among the adhesive and by the adhesive；It include suspension and to be dispersed in the suspension in the microcapsules
In a plurality of types of particles, each type of particle have it is several, the particle of wherein at least one type can be in electric field
Under the action of migrate, which is characterized in that microcapsules generally two layers of the arrangement in the photoelectric medium.
In addition, second aspect of the present invention additionally provides a kind of electrophoretic display device (EPD), with above-mentioned electrophoresis showed component with
And one or more second electrode, the second electrode be set to close on the photoelectric medium side and with the first electrode phase
It is right.
In addition, third aspect present invention provides a kind of preparation method for preparing above-mentioned electrophoresis showed component, including with
Lower step:
Microcapsules, adhesive and water are uniformly mixed and obtain coating fluid；
Coating fluid is coated on transparent first electrode, is dried to obtain coating fluid with a thickness of between 20-60 microns
Photoelectric medium, thus be made electrophoresis showed component.
Moreover, fourth aspect present invention additionally provides a kind of preparation method of electrophoretic display device (EPD) comprising the steps of:
Adhesive and water are weighed according to the ratio that weight ratio is 1:8, after adhesive is dissolved in the water, weight ratio, which is added, is
15 microcapsules carry out that 1 hour obtained coating fluid is mixed with the mixing speed of 200-300rpm；
The viscosity for controlling above-mentioned coating fluid is 70-250cp, and coating fluid is then coated on transparent using and aoxidizes phosphide material
In the first electrode of production, coating speed is adjusted to control the coating thickness of coating fluid as 30-40 microns；
It is heating and curing to the first electrode and coating fluid, electrophoresis showed component is made；
Side where the coating fluid of the electrophoresis showed component is glued by adhesive and the substrate with several second electrodes
With obtained electrophoretic display device (EPD).
The invention will be further described below.
All documents recited in the present invention, their full content are incorporated herein by reference, also, if these are literary
When offering stated meaning and the inconsistent present invention, it is subject to statement of the invention.In addition, the various terms that use of the present invention and
Phrase has that well known to a person skilled in the art general senses, nonetheless, the present invention remain desirable at this to these terms and
Phrase is described in more detail and explains.The term and phrase referred to is if any inconsistent with common art-recognized meanings, with institute's table of the present invention
Subject to the meaning stated.The present invention is described in further detail below.
Specifically, the electrophoresis showed component provided according to a first aspect of the present invention, including transparent first electrode and attached
In the photoelectric medium of the first electrode side；The photoelectric medium has microcapsules and adhesive, the microcapsules dispersion
It is fixed among the adhesive and by the adhesive；It include suspension and to be dispersed in the suspension in the microcapsules
A plurality of types of particles in liquid, each type of particle have it is several, the particle of wherein at least one type can be in electricity
It is migrated under the action of, generally two layers of the arrangement of the microcapsules in the photoelectric medium.Above-mentioned " layer " refers to micro- glue
Capsule is stacked in adhesive, i.e., a large amount of microcapsules extend to be formed in parallel with first along the side of the first electrode
The planar structure of the side of electrode.
Wherein, the microcapsules are in flat shape, i.e., the ratio of width to height of the described microcapsules is greater than 1, is greater than 1.2, example
Such as larger than 1.5, it is greater than 1.75.Term "high" refers to projection of the microcapsules in the plane of the side perpendicular to the first electrode
In, along perpendicular to longest distance on the direction of the side of the first electrode；Term " width " refers to microcapsules being parallel to
State in the projection in the plane of the side of first electrode, along the direction of the side that is parallel to the first electrode it is longest away from
From.Term " the ratio of width to height " refers to wide/high obtained numerical value defined above.
The electrophoresis showed component provided according to a first aspect of the present invention, the partial size of the microcapsules is 10-80 microns, described
Photoelectric medium with a thickness of between 20-60 microns, such as 25 microns, 30 microns, 35 microns, 40 microns and 45 microns and 50 micro-
Rice, preferably 30-50 microns, such as 36 microns, 38 microns and 40 microns.Above-mentioned phrase " partial size " has well known in the art contain
Justice, refers to its average grain diameter, i.e., for a group by the molecular practical population of the different grain of size and shape, with one by
The hypothetical particle faciation ratio of uniform spheroidal particle composition claims the straight of this spheroidal particle if the partial size overall length of the two is identical
Diameter is the average grain diameter of practical population.
The electrophoresis showed component provided according to a first aspect of the present invention, the partial size of the microcapsules is 20-50 microns, described
Photoelectric medium with a thickness of 25-50 microns, such as 30 microns, 36 microns, 38 microns and 40 microns, preferably 30-40 microns, such as
38 microns.
The electrophoresis showed component provided according to a first aspect of the present invention, the suspension in the microcapsules are transparent suspension
Liquid, the particle in the microcapsules is by several the first positively charged charged particles and several electronegative second set of charged particles
At the color inequality of first charged particle and second charged particle.In addition, the suspension in the microcapsules can also
To be transparent suspension, particle in the microcapsules is by several positively charged or electronegative charged particle and uncharged
Neutral particle composition, the color inequality of the charged particle and the neutral particle.
In addition, a kind of electrophoretic display device (EPD) provided according to a second aspect of the present invention comprising above-mentioned each optimal technical scheme
Described in electrophoresis showed component and one or more second electrode, the second electrode be set to closes on the photoelectric medium
Side and opposite with the first electrode.
The electrophoretic display device (EPD), the second electrode are set to the upper surface of a substrate according to a second aspect of the present invention,
The display component is fixed on the surface of the side where the second electrode of the substrate by adhesive or laminating operation.
In addition, what is provided according to a third aspect of the present invention a kind of prepares electrophoresis showed group described in above-mentioned each technical solution
The preparation method of part comprising following steps:
Microcapsules, adhesive and water are uniformly mixed and obtain coating fluid；
Coating fluid is coated on transparent first electrode, is dried to obtain coating fluid with a thickness of between 20-50 microns
Photoelectric medium, thus be made electrophoresis showed component.
The weight ratio of the preparation method provided according to a third aspect of the present invention, the adhesive and the microcapsules is 5%-
70%, preferably 10%-60%, such as 20%-40%, such as 30%.
The preparation method that third invention provides according to the present invention, the partial size of the microcapsules are 10-80 microns, the photoelectricity
Medium with a thickness of between 20-60 microns, preferably 30-45 microns, such as 36 microns, 38 microns and 40 microns.Alternatively, described micro-
The diameter of capsule be 20-50 microns, the photoelectric medium with a thickness of 25-50 microns, preferably 30-45 microns, such as 36 microns,
38 microns and 40 microns.
The preparation method that third invention provides according to the present invention, the adhesive is water-soluble high-molecular compound, described
Water-soluble high-molecular compound be selected from methylcellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl starch, Ah
It draws primary glue, gelatin, soybean protein, polyvinyl alcohol, polyethylene glycol and is answered by what above two or two or more materials formed
Condensation material.
The preparation method provided according to a third aspect of the present invention, the coating fluid are by the microcapsules, adhesive and water
With stirred under the mixing speed of 200-300rpm 0.5-2 hours formed, preferably 0.5-1.5 hours, such as 1 hour.Preferably,
The dispersion viscosity of the coating fluid is 70-200cps, preferably 100-150cps.
In addition, a kind of preparation method for electrophoretic display device (EPD) that fourth aspect present invention also provides comprising the steps of:
Adhesive and water are weighed according to the ratio that weight ratio is 1:8, after adhesive is dissolved in the water, weight ratio, which is added, is
15 microcapsules carry out that 1 hour obtained coating fluid is mixed with the mixing speed of 200-300rpm；
The viscosity for controlling above-mentioned coating fluid is 70-200cp, and coating fluid is then coated on transparent using and aoxidizes phosphide material
In the first electrode of production, coating speed is adjusted to control the coating thickness of coating fluid as 30-40 microns；
It is heating and curing to the first electrode and coating fluid, electrophoresis showed component is made；
Side where the coating fluid of the electrophoresis showed component is glued by adhesive and the substrate with several second electrodes
With obtained electrophoretic display device (EPD).
The present invention also achieves following the utility model has the advantages that the arrangement of bilayered microcapsule not only avoids the micro- glue of existing single layer
The disadvantages of application difficulties existing for capsule, yields is low, and photoelectric properties are poor, and improve effective display surface of electrophoretic display device (EPD)
Product.In addition, the bilayer arrangement structure also avoids, photoelectric medium is blocked up, and the electric field strength acted on photoelectric medium is low to be lacked
Point.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is the schematic diagram of the section structure of existing electrophoretic display device (EPD), and the microcapsules in photoelectric medium in figure are single layer row
Cloth structure, and microcapsules are in flat pattern；
Fig. 2 is the picture for having the electrophoretic display device (EPD) of Single-layer microcapsules arrangement in SEM, it can be seen that the electrophoresis is aobvious
Show the arrangement of the Single-layer microcapsules of component；
Fig. 3 is picture of the electrophoretic display device (EPD) of Fig. 2 in biomicroscope, it can be seen that between microcapsules inevitably
There are a large amount of gaps, reduce the effective display area of electrophoretic display device (EPD)；
Fig. 4 is the structural schematic diagram of the electrophoresis showed component with bilayered microcapsule arrangement of the embodiment of the present invention 1；
Fig. 5 is the structural schematic diagram of microcapsules in Fig. 4；
Fig. 6 is the structural schematic diagram of the electrophoretic display device (EPD) with bilayered microcapsule arrangement of the embodiment of the present invention 2；
Fig. 7 is picture of the section of the electrophoretic display device (EPD) in Fig. 6 in SEM, although part is due to the original of microcapsules volume
Cause causes certain regional areas to only have a microcapsule, and certain regional areas have the arrangement of Multi-layer microcapsule, but big
It is the arrangement with two microcapsules on body；
Fig. 8 is picture of the Fig. 6 of the present invention in biomicroscope, it can be seen that the arrangement with bilayered microcapsule makes
Gap very little between microcapsules, to improve the effective display area of electrophoretic display device (EPD).
In figure:
| 10 | First electrode | 20 | Photoelectric medium |
| 21 | Microcapsules | 211 | Charged particle |
| 212 | Neutral particle | 213 | Suspension |
| 22 | Adhesive | 30 | Second electrode |
Specific embodiment
The present invention is further illustrated below by specific example, it should be understood, however, that, these examples are only used for more
It specifically describes and is used in detail, but should not be understood as present invention is limited in any form.
Embodiment 1
Fig. 4 show a kind of diagrammatic cross-section of electrophoresis showed component.Electrophoresis showed component in Fig. 3 includes transparent
One electrode 10, and it is attached to the photoelectric medium 20 of 10 side of first electrode.The photoelectric medium 20 has microcapsules 21
With adhesive 22, microcapsules 21 are fixed by adhesive 22 and are adhered in first electrode 10.Wherein, first electrode 10 is excellent
Gate peroxidating indium (ITO), SnO2Or the transparent conductive film of ZnO/A1 is implemented.
From fig. 4, it can be seen that the microcapsules 21 are in flat shape, the ratio of width to height is greater than 1.2.Due to microcapsules 21
Deformation extent is different, it is also possible to the ratio of width to height occurs greater than 1.5, or the microcapsules 21 greater than 1.75.In spite of capsule slightly
Partial size it is smaller or be deformed into elongated structure filling among the gap between other microcapsules, but substantially it can be seen that big
Most microcapsules 21 are shunk under the action of self gravity or other extraneous mechanical forces or adhesive 22 to be formed in figure
Flat pattern.
Still further aspect, from Fig. 3 it can also be seen that microcapsules 21 are being in two layers of arrangement knot in photoelectric medium 20
Structure, wherein one layer of side (referred to as " upper layer ") for closing on first electrode 10, in addition one layer of microcapsules 21(for nestling up upper layer is known as
" lower layer ").In general, microcapsules 21 can be coated in first electrode 10 by adhesive 22 and be implemented.Therefore, this reality
The microcapsules 21 applied in the photoelectric medium 20 in example can be by adhesive 22, and the adhesive 22 after especially solidifying firmly glues
Together.
Fig. 5 show the structural schematic diagram of microcapsules 21.Transparent suspension is wrapped in inside microcapsules 21 shown in figure
Suspension 213 and the particle component structure as described in Chinese patent CN101738814A therein: liquid 213 and particle suspend
Liquid 213 is low polar dispersion solvent, such as arene or halogenated substance；Particle is divided into two types: one is bands
Positive electricity or electronegative charged particle 211, the charged particle 211 can under the action of external electrical field along direction of an electric field outstanding
It is migrated in supernatant liquid 213；Another is uncharged neutral particle 212.It is described it is " not charged " be not defined as completely with out
Electricity only refers to that the current potential on neutral particle 212 is lower, at extra electric field (electric field that charged particle 211 can be promoted to migrate)
Under the action of do not move or do not move substantially, i.e., the migration rate relative to charged particle 211, the neutral particle 212 move
It is very slow to move rate, it might even be possible to the degree ignored.Following experimental group 1-4 uses the microcapsules 21 of the type to be surveyed
Examination.
Nonetheless, the substance wrapped up in microcapsules 21 can also also have other forms, such as Chinese patent
Electrophoresis liquid disclosed in CN101542383B, wherein solvent and with different optical properties and be dispersed in the solvent
One, second, third dispersible particle, the first dispersible particle is not charged, and the second dispersible particle is positively charged, and grain can be dispersed in third
Subband negative electricity.In addition, the substance wrapped up in microcapsules 21 can also be a kind of suspension described in United States Patent (USP) US3612758
213 be coloured suspension 213, and particle is the particle composition of single electrification type.In addition, the substance wrapped up in microcapsules 21
It can also include transparent suspension, the particle in the microcapsules is born by several the first positively charged charged particles and several bands
The second charged particle composition of electricity, the color inequality of first charged particle and second charged particle.
Due to containing a large amount of microcapsules 21 in photoelectric medium 20, and 21 partial size of microcapsules is generally micro- in 0.1-100
Rice, is therefore less likely to individually operate each microcapsules 21 to control microcapsules 21 and form above-mentioned bilayer arrangement knot
Structure.Therefore, the present invention can be controlled by the partial size of thickness and microcapsules 21 to photoelectric medium 20, to obtain substantially
For the electrophoresis showed component of the arrangement of two microcapsules 21.
The preparation method of the photoelectric subassembly with 21 arrangement of bilayered microcapsule is described below, according to difference
The microcapsules 21 of particle size range and the thickness of photoelectric medium 20 obtain the electrophoresis showed component of corresponding four groups of experimental groups.
Experimental group 1
In the present embodiment, the microcapsules 21 produced are filtered out into diameter at 80 microns by the sieve that aperture is 80 microns
Above microcapsules 21(is excessive), 10 microns of microcapsules 21(mistakes below are then filtered out by the sieve that aperture is 10 microns
It is small), so as to obtain the microcapsules 21 that diameter is 10-80 microns.
The microcapsules 21 that above-mentioned partial size is weighed at 10-80 microns are that 150g will be dissolved by 10g Gelatin in 80g water
It is added in microcapsules 21 after good gelatin solution filtering, make after being mixed 1 hour with the mixing speed of 200-300rpm
Viscosity is obtained in 21 dispersion liquids of 70-250cp microcapsules, that is, coating fluid.
Then above-mentioned coating fluid is coated in first electrode 10 using coating instrument, adjusts the coating speed control of coating instrument
Between 20-60 microns, by being heating and curing, the compact arranged electrophoresis showed of bilayered microcapsule 21 is made in the thickness of photoelectric medium
Component.
Experimental group 2
The difference of preparation process and experimental group 1 is, control photoelectric medium with a thickness of 30-50 microns, obtain having double
The electrophoresis showed component of layer arrangement.Fig. 7 show the corresponding electrophoresis showed of electrophoresis showed component as made from SEM observation
The diagrammatic cross-section of device, it can be seen that due to 21 volume of microcapsules is different, although there may be one in certain some areas
A little large-sized microcapsules 21 and occur only having the case where microcapsule 21, it is also possible to exist in certain local areas many
The phenomenon that microcapsules 21 of small particle are accumulated, such as three microcapsules are stacked to form by the microcapsules 21 of three small particles
21 arrangement, it is also possible to appear in certain regional areas and occur only by the arrangement knot of a large-sized microcapsules 21
Structure, but on the whole, it is substantially that the arrangements of two microcapsules 21 (is averagely that the photoelectric medium 20 of the thickness, which forms,
The arrangement of two microcapsules 21).
Fig. 8 show by the electrophoresis showed component of the structure be placed in biology microscope under the microscope obtained picture (with Fig. 3
Amplification factor it is identical).It will be apparent that relative to the gap in Fig. 3 between microcapsules 21, it is shown in Fig. 8 to have bilayer micro-
Gap between the electrophoresis showed component of 21 arrangement of capsule is smaller, and effective display area is bigger.
Experimental group 3
Preparation process and experimental group 1 are essentially identical, and difference is, the partial size of the microcapsules 21 of selection is 20-50 microns,
Control coating photoelectric medium 20 with a thickness of 25-50 microns, obtain the electrophoresis showed component with bilayer arrangement structure.
Experimental group 4
Preparation process and experimental group 1 are essentially identical, and difference is, the partial size of the microcapsules 21 of selection is 20-50 microns,
Control coating photoelectric medium 20 with a thickness of 30-45 microns, obtain the electrophoresis showed component with bilayer arrangement structure.
Reference group
Preparation process and experimental group 1 are essentially identical, and difference is, the partial size of the microcapsules 21 of selection is that 50-100 is micro-
Rice, control the photoelectric medium 20 of coating with a thickness of 15-20 microns, obtain the electrophoresis showed component with single layer arrangement.
Embodiment 2
Fig. 5 show the electrophoretic display device (EPD) using the electrophoresis showed establishment of component of structure in embodiment 1, in embodiment 1
The electrophoresis showed component and second electrode 30 of discussion, the second electrode 30 be set to close on 20 side of photoelectric medium and with institute
It is opposite to state first electrode 10.In the present embodiment, the second electrode 30 is set to the upper surface of a substrate, and the display component is logical
It crosses adhesive 22 or laminating operation is fixed on the upper surface of the substrate.For second electrode 30 and substrate, it is preferable to use tool
There is switching function and the thin film transistor (TFT) of electric field can be applied.
Picture quality detection
Researcher shows the electrophoresis showed component of experimental group 1-4 according to the prepared electrophoresis of method in embodiment 2
Show that device power-up makes first electrode 10 and second electrode 30 have a driving voltage, it is aobvious that electrophoresis is then tested using spectrophotometer
Show the data of the characterization electrophoretic display device (EPD) picture quality such as black and white reflectivity, contrast of device.Meanwhile the above method detects reference group
The corresponding electrophoretic display device (EPD) of electrophoresis showed component display quality, obtain data as shown in the table.
Note: 1.L* numerical value embodies the reflective light intensity of display film, and L* value is higher to mean that reflectivity is stronger.
2.R numerical value embodies the reflectivity values of display film, R=((L*+16)/116) 3*100%
3. contrast=R is white/R is black
From upper table it can also be seen that pair of the electrophoresis showed component (experimental group 1-4) with bilayered microcapsule arrangement
Than degree 12 or more, and the contrast of reference group 1 is only 10.17, therefore, substantially with the electricity of bilayered microcapsule arrangement
Swimming display component or electrophoretic display device (EPD) have more excellent display performance (reference group 1).
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of one of ordinary skill in the art can also be in the premise for not departing from present inventive concept
It is lower that various changes can be made.
Claims (19)
1. a kind of electrophoresis showed component including transparent first electrode, and is attached to photoelectricity Jie of the first electrode side
Matter；The photoelectric medium has microcapsules and adhesive, and the microcapsules are scattered among the adhesive and by the gluing
Agent is fixed；A plurality of types of particles for including suspension in the microcapsules and being dispersed in the suspension, every type
The particle of type have it is several, the particle of wherein at least one type can migrate under the action of electric field, which is characterized in that institute
Microcapsules generally two layers of the arrangement in photoelectric medium is stated, the photoelectric medium is single coating and heat cure is formed
Photoelectric medium.
2. electrophoresis showed component as described in claim 1, which is characterized in that the microcapsules are in flat shape.
3. electrophoresis showed component as claimed in claim 1 or 2, which is characterized in that the partial size of the microcapsules is that 10-80 is micro-
Rice, the photoelectric medium with a thickness of between 20-60 microns.
4. electrophoresis showed component as claimed in claim 3, which is characterized in that the partial size of the microcapsules is 10-80 microns, institute
State photoelectric medium with a thickness of 30-50 microns.
5. electrophoresis showed component as described in claim 1, which is characterized in that the partial size of the microcapsules is 20-50 microns, institute
State photoelectric medium with a thickness of 25-50 microns.
6. electrophoresis showed component as claimed in claim 5, which is characterized in that the partial size of the microcapsules is 20-50 microns, institute
State photoelectric medium with a thickness of 30-45 microns.
7. electrophoresis showed component as described in claim 1, which is characterized in that the suspension in the microcapsules is transparent hang
Supernatant liquid, the particle in the microcapsules is by several the first positively charged charged particles and several electronegative second set of charged particles
At the color inequality of first charged particle and second charged particle.
8. electrophoresis showed component as described in claim 1, which is characterized in that the suspension in the microcapsules is transparent hang
Supernatant liquid, the particle in the microcapsules is by several positively charged or electronegative charged particle and uncharged neutral particle group
At the color inequality of the charged particle and the neutral particle.
9. a kind of electrophoretic display device (EPD), which is characterized in that including electrophoresis showed component as claimed in any one of claims 1 to 8 with
And one or more second electrode, the second electrode be set to close on the photoelectric medium side and with the first electrode phase
It is right.
10. electrophoretic display device (EPD) as claimed in claim 9, which is characterized in that the second electrode is set to the upper table of a substrate
Face, the table of side where the display component is fixed on the second electrode of the substrate by adhesive or laminating operation
Face.
11. a kind of prepare the preparation method such as the described in any item electrophoresis showed components of claim 1-8, which is characterized in that packet
Include following steps:
Microcapsules, adhesive are uniformly mixed and obtain coating fluid；
Coating fluid is coated on transparent first electrode, is dried to obtain coating fluid with a thickness of the light between 20-60 microns
Dielectric, so that electrophoresis showed component be made.
12. preparation method as claimed in claim 11, which is characterized in that the weight ratio of the adhesive and the microcapsules is
5%-70%.
13. preparation method as claimed in claim 12, which is characterized in that the weight ratio of the adhesive and the microcapsules is
10%-60%.
14. preparation method as claimed in claim 13, which is characterized in that the weight ratio of the adhesive and the microcapsules is
20%-40%.
15. preparation method as claimed in claim 14, which is characterized in that the weight ratio of the adhesive and the microcapsules is
30%.
16. preparation method as claimed in claim 11, which is characterized in that the partial size of the microcapsules is 10-80 microns, described
Between 20-60 microns of thickness of photoelectric medium.
17. such as the described in any item preparation methods of claim 11-16, which is characterized in that the partial size of the microcapsules is 20-50
Micron, the photoelectric medium with a thickness of 25-50 microns.
18. preparation method as claimed in claim 17, which is characterized in that the partial size of the microcapsules is 20-50 microns, described
Photoelectric medium with a thickness of 30-45 microns.
19. a kind of preparation method of electrophoretic display device (EPD), which is characterized in that comprise the steps of:
Adhesive and water are weighed according to the ratio that weight ratio is 1:8, after adhesive is dissolved in the water, it is 15 that weight ratio, which is added,
Microcapsules carry out that 1 hour obtained coating fluid is mixed with the mixing speed of 100-300rpm；
Then coating fluid is coated in the transparent first electrode using oxidation phosphide material production, adjusts coating speed to control
The coating thickness of coating fluid is 30-40 microns；
It is heating and curing to the first electrode and coating fluid, electrophoresis showed component is made；
By side where the coating fluid of the electrophoresis showed component by adhesive and the substrate with several second electrodes it is viscous and, make
Obtain electrophoretic display device (EPD).
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| CN108279543A (en) * | 2018-02-26 | 2018-07-13 | 广州奥翼电子科技股份有限公司 | Electrophoresis showed diaphragm, electrophoretic display device (EPD) and electrophoretic display coating fluid |
| CN108470846B (en) | 2018-04-11 | 2019-09-10 | 京东方科技集团股份有限公司 | Packaging method, electronic device and sealed in unit |
| WO2020123741A1 (en) * | 2018-12-12 | 2020-06-18 | E Ink Corporation | Edible electrodes and uses in electro-optic displays |
| WO2024026951A1 (en) * | 2022-08-04 | 2024-02-08 | 广州奥翼电子科技股份有限公司 | Electro-optical material and manufacturing method therefor |
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| CN1494046A (en) * | 2002-10-31 | 2004-05-05 | ϣ | Improved electrophoresis display and its preparation method |
| KR20070068882A (en) * | 2005-12-27 | 2007-07-02 | 엘지.필립스 엘시디 주식회사 | Display device having multi-layer electronic ink and method for manufacturing thereof |
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| CN102310023A (en) * | 2010-06-30 | 2012-01-11 | 乐凯集团第二胶片厂 | Manufacture method of microcapsule display panel |
| CN102681280A (en) * | 2011-03-17 | 2012-09-19 | 凸版印刷株式会社 | Color-electrophoresis type display media panel |
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| TWI484275B (en) * | 2010-05-21 | 2015-05-11 | E Ink Corp | Electro-optic display, method for driving the same and microcavity electrophoretic display |
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| KR20070068882A (en) * | 2005-12-27 | 2007-07-02 | 엘지.필립스 엘시디 주식회사 | Display device having multi-layer electronic ink and method for manufacturing thereof |
| CN102103298A (en) * | 2009-12-17 | 2011-06-22 | 乐凯集团第二胶片厂 | Electrophoresis display panel and manufacturing method thereof |
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