CN110531560A - A kind of discoloration electrophoresis particle and preparation method thereof and electrophoretic display device (EPD) - Google Patents
A kind of discoloration electrophoresis particle and preparation method thereof and electrophoretic display device (EPD) Download PDFInfo
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- CN110531560A CN110531560A CN201910739315.0A CN201910739315A CN110531560A CN 110531560 A CN110531560 A CN 110531560A CN 201910739315 A CN201910739315 A CN 201910739315A CN 110531560 A CN110531560 A CN 110531560A
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- 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
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- 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
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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
- G02F1/1675—Constructional details
- G02F2001/1678—Constructional details characterised by the composition or particle type
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Abstract
The present invention relates to a kind of discoloration electrophoresis particle and preparation method thereof and electrophoretic display device (EPD)s.The discoloration electrophoresis particle includes matrix and embedded photoluminescent material, described matrix is metal oxide materials, the embedded photoluminescent material is coated on outside described matrix, the colour different from the color of described matrix is presented in the embedded photoluminescent material under the irradiation of the excitation light source of predetermined band range, the embedded photoluminescent material is colorless and transparent under the irradiation without the excitation light source or color identical with the color of described matrix is presented, and the discoloration electrophoresis particle has charge.Inventive embodiments allow electrophoretic display device (EPD) to show colored content by increasing embedded photoluminescent material on electrophoresis particle.
Description
The application is the divisional application of following application: applying date 2016.12.09, application No. is 201611132764.1,
Entitled a kind of discoloration electrophoresis particle and preparation method thereof and electrophoretic display device (EPD).
Technical field
The invention belongs to electrophoretic display apparatus technical fields, and in particular to a kind of discoloration electrophoresis particle and preparation method thereof and electricity
Phoretic display.
Background technique
Electrophoretic display device (EPD) is a kind of as thin as paper, soft and erasable display, in recent years in billboard and price
It is more and more widely used on board.Existing electrophoretic display device (EPD) can only substantially show black-and-white two color, this makes its application
It is very limited.
Summary of the invention
Based on the deficiencies of the prior art, colored change can be shown the technical problem to be solved by the invention is to provide one kind
Color electrophoresis particle and preparation method thereof and electrophoretic display device (EPD).
On the one hand the embodiment of the present invention provides a kind of discoloration electrophoresis particle comprising matrix and embedded photoluminescent material, it is described
Matrix is metal oxide materials, and the embedded photoluminescent material is coated on outside described matrix, and the embedded photoluminescent material is pre-
The colour different from the color of described matrix is presented under the irradiation of the excitation light source of standing wave segment limit, the embedded photoluminescent material exists
Colorless and transparent or presentation color identical with the color of described matrix, the discoloration electrophoresis under the irradiation of the no excitation light source
Particle has charge.
Preferably, the metal oxide includes the one or more of following material: titanium white, lithopone, zinc oxide, dioxy
SiClx, iron oxide black, carbon black, chromite, chromate, silicate, chrome oxide green, chrome green, copper oxide, titan yellow, chrome yellow, iron oxide yellow,
It is chrome green, manganese violet, barba hispanica, cobalt blue, zinc white, cadmium yellow, cadmium red, barium sulfate, molybdate orange, ultramarine, celeste blue, emerald green, emerald green.
Preferably, the embedded photoluminescent material is rare-earth oxide or organic luminescent compounds.
Preferably, the rare-earth oxide includes the one or more of following material: yttrium oxide, lanthana, oxidation
Cerium, praseodymium oxide, neodymia, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosia, holimium oxide, erbium oxide, ytterbium oxide, oxidation
Lutetium, scandium oxide, thulium oxide；The organic luminescent compounds include the one or more of following material: acrylic acid -9- anthracene methyl esters,
Methacrylic acid -9- anthracene methyl esters, ethidium bromide-N, N`- diacetamide, fluorescein-O- acrylate, 2- naphthalene acrylate,
N- (1- naphthalene) ethylendiamine dihydrochloride, 7- [4- (trifluoromethyl) cumarin] acrylamide, 9- vinyl anthracene, polyacrylic acid-
9- anthracene methyl esters, poly- (3,3 ', 4,4 '-benzophenone tetracarboxylic dianhydride-ALT-3,6- proflavin Hemisulphate), poly- (fluorescence
Plain O- acrylate), poly- [(methyl methacrylate)-CO- methacryloxy fluorescein], poly- (2- naphthalene acrylic acid
Ester), poly- [N- (1- naphthalene)-N phenyl acrylamide], poly- (pyromellitic acid anhydride-CO- thionine), poly- (2- vinyl naphthalene),
CuPc, dichloro three (1,10- phenanthroline) ruthenium (II) hydrate, 8-hydroxyquinoline mantoquita, four (2- methyl -8-hydroxyquinoline) boron
Lithium, 2,3- dichloride naphthalene Tin Phthalocyanine, three (8-hydroxyquinoline)-erbiums, 8-hydroxyquinoline aluminium, benzo [k] fluoranthene, bis- (the 2- ammonia of 1,2-
Phenoxyl)-ethane-N, N, N ', N '-tetraacethyl, 2- tert-butyl anthraquinone, 3,8- diamino -6- phenylphenanthridineand, 5,8- dihydroxy
Base -1,4- naphthoquinones, 2,3- diphenyl maleic anhydride, 7- hydroxyl -4- trifluoromethyl cumarin, long Luo Liding, phenanthridines, 1- pyrene first
Aldehyde.
Preferably, the excitation light source of the predetermined band range is ultraviolet light or infrared light.
Preferably, the embedded photoluminescent material is coated on the base by grafting, blending, coprecipitation or sol-gal process
Outside body.
On the other hand the embodiment of the present invention provides a kind of method for preparing discoloration electrophoresis particle described in any of the above embodiments,
Include the following steps: that (1) prepares the predecessor of the metal oxide and the aqueous solution of dehydrated alcohol, obtains solution A；(2) match
The predecessor of the embedded photoluminescent material and the aqueous solution of dehydrated alcohol are made, solution B is obtained；(3) solution A and solution are mixed
B, reaction obtain gel C；(4) gel C is dried, obtains shot-like particle D；(5) it mixes the shot-like particle D and siloxanes is coupled
Agent, reaction obtain the discoloration electrophoresis particle.
It preferably, further include step (6): by the resulting discoloration electrophoresis particle of step (5) and with the high polymer monomer of double bond
Reaction.
Preferably, the metal oxide is titanium dioxide, and the predecessor of the metal oxide is tetrabutyl titanate, institute
Stating embedded photoluminescent material is yttrium oxide, and the predecessor of the embedded photoluminescent material is yttrium acid bismuth.
The embodiment of the present invention also provides a kind of method for preparing discoloration electrophoresis particle described in any of the above embodiments comprising such as
Lower step: (1) aqueous solution of embedded photoluminescent material and acid is prepared, solution E is obtained；(2) to the molten of solution E addition second alcohol and water
Liquid obtains solution F；(3) polyethylene glycol is added to solution F, obtains gel G；(4) metal oxide is added to gel G, instead
It should obtain suspension H；(5) the suspension H is dried, obtained product is mixed with silicone coupling agents, and reaction obtains described
Change colour electrophoresis particle.
It preferably, further include step (6): by the resulting discoloration electrophoresis particle of step (5) and with the high polymer monomer of double bond
Reaction.
Another further aspect of the embodiment of the present invention provides a kind of electrophoretic display device (EPD) comprising stacks gradually the saturating of connection from outside to inside
Bright foreboard, electrophoretic display layer and backboard, the transparent front plate and backboard are by circuit connection, in the electrophoretic display layer two
End applies electric signal, and the electrophoretic display layer includes multiple electrophoresis showed micro units, packet in each electrophoresis showed micro unit
It includes electrophoresis liquid and at least one discoloration electrophoresis particle as described in any one of the above embodiments, the discoloration electrophoresis particle is suspended in the electricity
It swims in liquid, the discoloration electrophoresis particle is electrically charged, and in the electricity under the driving of the transparent front plate and the electric signal of backboard
It is moved in swimming liquid.
Preferably, the electrophoretic display device (EPD) further includes excitation light source and light guide plate, and the excitation light source is located at described transparent
The side of foreboard, the light guide plate cover the outside of the transparent front plate, and the light directing for issuing the excitation light source is extremely
It is incident from the transparent front plate.
Preferably, each electrophoresis showed micro unit includes the first electrophoresis particle with the charges of different polarity and the second electrophoresis grain
Son, first electrophoresis particle are discoloration electrophoresis particle as described in any one of the above embodiments, and the matrix of first electrophoresis particle is in
White, second electrophoresis particle are in black.
Preferably, the electrophoretic display layer includes a variety of electrophoresis showed micro units, in a variety of electrophoresis showed micro units
Discoloration electrophoresis particle different colours are presented under the irradiation of identical excitation light source.
The embodiment of the present invention allows electrophoretic display device (EPD) to show colour by increasing embedded photoluminescent material on electrophoresis particle
Content.
The invention will now be described in detail with reference to the accompanying drawings, as part of this specification, this is illustrated by embodiment
The principle of invention, other aspects of the present invention, feature and its advantage will be become apparent by the detailed description.
Detailed description of the invention
Fig. 1~2 are the structural schematic diagram of two kinds of electrophoretic display device (EPD)s provided in an embodiment of the present invention.
Fig. 3~5 are the working state schematic representations of electrophoretic display device (EPD) provided in an embodiment of the present invention.
Specific embodiment
In order to be more clear goal of the invention of the invention, technical solution and its technical effect, below in conjunction with attached drawing and tool
The present invention is described in detail for body embodiment.It should be understood that specific embodiment described in this specification is only
It is to be not intended to limit the present invention to explain the present invention.
Please refer to Fig. 1 to Fig. 5, on the one hand the embodiment of the present invention provides a kind of electrophoretic display device (EPD) comprising from outside to inside according to
Transparent front plate 13, electrophoretic display layer 12 and the backboard 11 of secondary stacking connection.Electrophoretic display layer 12 includes the micro- list of multiple electrophoresis showeds
Member 121, the interior discoloration electrophoresis particle 122 that there is electrophoresis liquid and be suspended in electrophoresis liquid of each electrophoresis showed micro unit 121, discoloration
Electrophoresis particle 122 includes matrix and embedded photoluminescent material, and embedded photoluminescent material is coated on matrix outer.Transparent front plate 13 and backboard
11 make to change colour electrophoresis particle 122 under electric field action for applying electric signal at 12 both ends of electrophoretic display layer by circuit connection
It is moved in electrophoresis liquid.By controlling the number of pulses of electric signal, discoloration electrophoresis particle 122 can control from transparent front plate 13
Distance.
When not having excitation light source 30 to be radiated at the electrophoretic display layer 12 of electrophoretic display device (EPD), embedded photoluminescent material is colorless and transparent
Or color identical with the color of matrix is presented, the color for the electrophoresis particle 122 that changes colour at this time is exactly the color of matrix, and electrophoresis is aobvious
Show color that device is shown and matrix.When there is the excitation light source 30 of predetermined band range to be radiated on electrophoretic display layer 12,
The colour different from the color of matrix is presented in discoloration electrophoresis particle 122 under the irradiation of the excitation light source 30 of predetermined band range,
The color of such as red, green, blue, yellow and purple, the electrophoresis particle 122 that changes colour at this time is the color of embedded photoluminescent material,
What electrophoretic display device (EPD) was shown is also the color of embedded photoluminescent material.Wherein, the excitation light source 30 of predetermined band range can be purple
Outer light or infrared light.
Metal oxide is the matrix component part of discoloration electrophoresis particle 122, and embedded photoluminescent material is rare earth metal oxidation
Object or organic luminescent compounds, embedded photoluminescent material can be coated on base by grafting, blending, coprecipitation or sol-gal process
Outside body.
Metal oxide includes the one or more of following material: titanium white, lithopone, zinc oxide, silica, iron oxide black,
Carbon black, chromite, chromate, silicate, chrome oxide green, chrome green, copper oxide, titan yellow, chrome yellow, iron oxide yellow, chrome green, manganese
It is purple, barba hispanica, cobalt blue, zinc white, cadmium yellow, cadmium red, barium sulfate, molybdate orange, ultramarine, celeste blue, emerald green, emerald green.
Rare-earth oxide includes the one or more of following material: yttrium oxide, lanthana, cerium oxide, praseodymium oxide, oxygen
Change neodymium, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosia, holimium oxide, erbium oxide, ytterbium oxide, luteium oxide, scandium oxide, oxygen
Change thulium.
Organic luminescent compounds include the one or more of following material: acrylic acid -9- anthracene methyl esters, methacrylic acid -9-
Anthracene methyl esters, ethidium bromide-N, N`- diacetamide, fluorescein-O- acrylate, 2- naphthalene acrylate, N- (1- naphthalene) second two
Amine dihydrochloride, 7- [4- (trifluoromethyl) cumarin] acrylamide, 9- vinyl anthracene, polyacrylic acid -9- anthracene methyl esters, it is poly- (3,
3 ', 4,4 '-benzophenone tetracarboxylic dianhydride-ALT-3,6- proflavin Hemisulphates), poly- (fluorescein O- acrylate),
Poly- [(methyl methacrylate)-CO- methacryloxy fluorescein], poly- (2- naphthalene acrylate), poly- [N- (1- naphthalene
Base)-N phenyl acrylamide], poly- (pyromellitic acid anhydride-CO- thionine), poly- (2- vinyl naphthalene), CuPc, dichloro three
(1,10- phenanthroline) ruthenium (II) hydrate, 8-hydroxyquinoline mantoquita, four (2- methyl -8-hydroxyquinoline) boron lithiums, 2,3- dichloride
Bis- (2- the amino-benzene oxygen)-second of naphthalene Tin Phthalocyanine, three (8-hydroxyquinoline)-erbiums, 8-hydroxyquinoline aluminium, benzo [k] fluoranthene, 1,2-
Alkane-N, N, N ', N '-tetraacethyl, 2- tert-butyl anthraquinone, 3,8- diamino -6- phenylphenanthridineand, 5,8- dihydroxy -1,4- naphthoquinones, 2,
3- diphenyl maleic anhydride, 7- hydroxyl -4- trifluoromethyl cumarin, long Luo Liding, phenanthridines, 1- pyrene formaldehyde.
In a preferred embodiment, each electrophoresis showed micro unit 121 includes the first electrophoresis particle with the charges of different polarity and
Two electrophoresis particles, the first electrophoresis particle are discoloration electrophoresis particle 122, and the matrix of the first electrophoresis particle is white, the second electrophoresis grain
Son is in black.It should be noted that the second electrophoresis particle can be discoloration electrophoresis particle 122, discoloration electrophoresis grain may not be
Son 122, i.e. the outside of the second electrophoresis particle can not have embedded photoluminescent material.Discoloration electricity now white with matrix, positively charged
Swimming particle 122 and matrix in black, electronegative discoloration electrophoresis particle 122 embodiment for illustrate electrophoresis showed of the present invention
The working principle of device.Referring to FIG. 3, change colour electrophoresis particle in 30 pairs of discoloration electrophoresis particle 122 irradiations of no excitation light source
122 distinguish white and black, and what electrophoretic display device (EPD) was shown is also the pattern or text of black and white composition at this time.It please refers to
Fig. 4, when transparent front plate 13 and backboard 11 are when electrophoretic display layer 12 applies negative voltage pulse, white discoloration electrophoresis particle 122
It is moved to close to the position of transparent front plate 13, the discoloration electrophoresis particle 122 of black is then moved to close to the position of backboard 11, at this time
By the light (such as ultraviolet source) of 30 pairs of the excitation light source irradiation predetermined band ranges of electrophoresis particles 122 that change colour, white at this time
Discoloration electrophoresis particle 122 becomes the color after embedded photoluminescent material is excited (such as red), is embodied on electrophoretic display device (EPD), white
Corresponding color (such as red) is presented in the block that the discoloration electrophoresis particle 122 of color is assembled, referring to FIG. 4, with the electricity that changes colour in figure
The different texture of particle 122 of swimming indicates discoloration.Referring to FIG. 5, when transparent front plate 13 and backboard 11 are in electrophoretic display layer
When 12 application positive voltage pulse, the discoloration electrophoresis particle 122 of black is moved to close to the position of transparent front plate 13, white discoloration
Electrophoresis particle 122 is then moved to close to the position of backboard 11, is irradiated at this time by 30 pairs of discoloration electrophoresis particles 122 of excitation light source pre-
Luminescence generated by light material is presented in the light (such as ultraviolet light) of standing wave segment limit, the block that the discoloration electrophoresis particle 122 of black is assembled at this time
Expect the color (such as purple) after being excited.In other embodiments, the first electrophoresis particle and the second electrophoresis particle wherein it
One can be not charged.
Referring to FIG. 2, electrophoretic display device (EPD) further includes excitation light source 30 and light guide plate 16, excitation light source 30 is arranged before transparent
The side of plate 13, light guide plate 16 are covered on the outside of transparent front plate 13, and the light directing for issuing excitation light source 30 is extremely from saturating
Bright foreboard 13 is incident.It is provided with light element 161 on light guide plate 16, incident light can be made to be distributed more uniform, make picture
Display effect such as form and aspect, lightness and color saturation are balanced.
In some preferred embodiments, electrophoretic display layer 12 includes a variety of electrophoresis showed micro units 121, a variety of electrophoresis showeds
Different colours namely every kind of electrophoresis is presented in discoloration electrophoresis particle 122 in micro unit 121 under the irradiation of identical excitation light source 30
It shows that the discoloration electrophoresis particle 122 in micro unit 121 is different, specifically can be embedded photoluminescent material difference, therefore swashing
Under the irradiation of light emitting source 30, different colors is presented in different electrophoresis showed micro units 121, so that electrophoretic display device (EPD) be enable to show
Show multiple color.
Another aspect of the present invention also provides a kind of method for preparing the discoloration electrophoresis particle 122 comprising following steps:
(1) aqueous solution of the predecessor of preparing metal oxide and dehydrated alcohol, obtains solution A；(2) before preparing embedded photoluminescent material
The aqueous solution for driving object and dehydrated alcohol, obtains solution B；(3) mixed solution A and solution B, reaction obtain gel C；(4) by gel C
Drying, obtains shot-like particle D；(5) shot-like particle D and silicone coupling agents are mixed, reaction obtains discoloration electrophoresis particle 122.
In some preferred embodiments, in order to enhance discoloration electrophoresis particle 122 stability and make change colour electrophoresis particle
122 are suspended in nonpolar solvent, and preparation method can also include step (6): the discoloration electrophoresis particle that step (5) is obtained
122 after removing free coupling agent, then react with the high polymer monomer with double bond.
Now it is illustrated for preparing red discoloration electrophoresis particle 122.Red discoloration electrophoresis particle 122 is prepared,
With tetrabutyl titanate [Ti (OC4H9)4] and yttrium acid bismuth be predecessor, dehydrated alcohol (C2H5It OH) is solvent, glacial acetic acid (CH3COOH)
For chelating agent, titanium dioxide and yttrium acid bismuth complex sol are prepared.At room temperature measure 10mL butyl titanate, be slowly dropped into 35mL without
In water-ethanol, with magnetic stirring apparatus strong stirring 10 minutes, it is uniformly mixed, forms yellow clear solution A.Then, by 4mL ice vinegar
Acid, yttrium acid bismuth and 10mL distilled water are added in another 35mL dehydrated alcohol, are vigorously stirred, and solution B is obtained, and instill 1-2 drop hydrochloric acid, are adjusted
Section pH value makes pH≤3.Then, in room-temperature water bath, be vigorously stirred and lower the solution A having been moved into constant pressure funnel be slowly dropped into solution
In B, speed about 3mL/min is dripped.Pale yellow solution is obtained after being added dropwise, and is continued after stirring half an hour, 40 DEG C of heating water baths, 2 is small
When after obtain white gels.It is placed at 80 DEG C and dries, about 20 hours, obtain Yttrium oxide doping TiO 2 particles.The particle
It is white under normal temperature state, takes on a red color under the irradiation of the light (such as ultraviolet source) within the scope of 30 predetermined band of excitation light source.
The present invention also provides a kind of methods for preparing the discoloration electrophoresis particle 122 comprising following steps: (1) preparing light
The aqueous solution of electroluminescent material and acid, obtains solution E；(2) to the solution of solution E addition second alcohol and water, solution F is obtained；(3) to
Solution F adds polyethylene glycol, obtains gel G；(4) metal oxide is added to gel G, reaction obtains suspension H；(5) it will hang
Supernatant liquid H drying, obtained product are mixed with silicone coupling agents, and reaction obtains discoloration electrophoresis particle 122.
Now to be illustrated for preparing the discoloration electrophoresis particle 122 of green.Wherein, metal oxide is with titanium dioxide
Matrix, outside be coated with silicon oxide layer.(1) Tb will be contained3+LaPO4 be dissolved in acid aqueous solution in, then and contain
The ethyl alcohol and water mixed solution (certain alcohol water ratio) of citric acid mix；(2) polyethylene glycol is added dropwise, stirring is formed after 3 hours
Gel then proceedes to stir, while the titanium dioxide for having coated with silica is added, and reacts 5 hours, obtains suspension；(3)
It is centrifugated suspension, then oven drying；(4) it anneals 2 hours at 700 DEG C, mixes products therefrom and silicone coupling agents,
Reaction obtains discoloration electrophoresis particle 122.
The embodiment of the present invention allows electrophoretic display device (EPD) to show colour by increasing embedded photoluminescent material on electrophoresis particle
Content.
Above disclosed is only presently preferred embodiments of the present invention, cannot limit the right of the present invention with this certainly
Range, therefore according to equivalent variations made by scope of the present invention patent, it is still within the scope of the present invention.
Claims (9)
1. a kind of electrophoretic display device (EPD) comprising stack gradually transparent front plate, electrophoretic display layer and the backboard of connection, institute from outside to inside
Transparent front plate and backboard are stated by circuit connection, for applying electric signal at the electrophoretic display layer both ends, which is characterized in that institute
Stating electrophoretic display layer includes multiple electrophoresis showed micro units, includes electrophoresis liquid and at least one in each electrophoresis showed micro unit
Kind discoloration electrophoresis particle, the discoloration electrophoresis particle are suspended in the electrophoresis liquid, and the discoloration electrophoresis particle is electrically charged, and
It is moved in the electrophoresis liquid under the driving of the electric signal of the transparent front plate and backboard.
2. electrophoretic display device (EPD) as described in claim 1, which is characterized in that the electrophoretic display device (EPD) further includes excitation light source and leads
Tabula rasa, the excitation light source are located at the side of the transparent front plate, and the light guide plate covers the outside of the transparent front plate, is used for
The light directing that the excitation light source is issued is extremely incident from the transparent front plate.
3. electrophoretic display device (EPD) as described in claim 1, which is characterized in that each electrophoresis showed micro unit includes that band is anisotropic
The first electrophoresis particle and the second electrophoresis particle of charge, first electrophoresis particle are discoloration electrophoresis particle, first electrophoresis
The matrix of particle is white, and second electrophoresis particle is in black.
4. electrophoretic display device (EPD) as described in claim 1, which is characterized in that the electrophoretic display layer includes that a variety of electrophoresis showeds are micro-
Different coloured silks are presented in unit, the discoloration electrophoresis particle in a variety of electrophoresis showed micro units under the irradiation of identical excitation light source
Color.
5. electrophoretic display device (EPD) according to any one of claims 1-4, which is characterized in that the discoloration electrophoresis particle comprising
Matrix and embedded photoluminescent material, described matrix are metal oxide materials, and the embedded photoluminescent material is coated on outside described matrix
Portion, the embedded photoluminescent material present different from the color of described matrix under the irradiation of the excitation light source of predetermined band range
Colour, the embedded photoluminescent material is colorless and transparent under the irradiation without the excitation light source or presents and the color of described matrix
Identical color, the discoloration electrophoresis particle have charge, the embedded photoluminescent material by grafting, be blended, coprecipitation or
Sol-gal process is coated on matrix outer.
6. electrophoretic display device (EPD) as claimed in claim 5, which is characterized in that the metal oxide includes one kind of following material
Or it is a variety of: titanium white, lithopone, zinc oxide, silica, iron oxide black, carbon black, chromite, chromate, silicate, chrome oxide green,
Chrome green, copper oxide, titan yellow, chrome yellow, iron oxide yellow, chrome green, manganese violet, barba hispanica, cobalt blue, zinc white, cadmium yellow, cadmium red, barium sulfate, molybdenum
It is orange, ultramarine, celeste blue, emerald green, emerald green.
7. electrophoretic display device (EPD) as claimed in claim 5, which is characterized in that the embedded photoluminescent material is rare-earth oxide
Or organic luminescent compounds.
8. electrophoretic display device (EPD) as claimed in claim 7, which is characterized in that the rare-earth oxide includes following material
It is one or more: yttrium oxide, lanthana, cerium oxide, praseodymium oxide, neodymia, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, oxygen
Change dysprosium, holimium oxide, erbium oxide, ytterbium oxide, luteium oxide, scandium oxide, thulium oxide；The organic luminescent compounds include following material
It is one or more: acrylic acid -9- anthracene methyl esters, methacrylic acid -9- anthracene methyl esters, ethidium bromide-N, N`- diacetamide, fluorescence
Element-O- acrylate, 2- naphthalene acrylate, N- (1- naphthalene) ethylendiamine dihydrochloride, 7- [4- (trifluoromethyl) cumarin]
Acrylamide, 9- vinyl anthracene, polyacrylic acid -9- anthracene methyl esters, it is poly- (3,3 ', 4,4 '-benzophenone tetracarboxylic dianhydride-ALT-3,
6- proflavin Hemisulphate), poly- (fluorescein O- acrylate), poly- [(methyl methacrylate)-CO- methacryl
Oxygroup fluorescein], poly- (2- naphthalene acrylate), poly- [N- (1- naphthalene)-N phenyl acrylamide], poly- (Pyromellitic Acid two
Acid anhydride-CO- thionine), poly- (2- vinyl naphthalene), CuPc, dichloro three (1,10- phenanthroline) ruthenium (II) hydrate, 8-hydroxyquinoline
Mantoquita, four (2- methyl -8-hydroxyquinoline) boron lithiums, 2,3- dichloride naphthalene Tin Phthalocyanine, three (8-hydroxyquinoline)-erbiums, 8- hydroxyl quinoline
Quinoline aluminium, benzo [k] fluoranthene, bis- (the 2- amino-benzene oxygen)-ethane-N, N, N ' of 1,2-, N '-tetraacethyl, 2- tert-butyl anthraquinone, 3,8-
Diamino -6- phenylphenanthridineand, 5,8- dihydroxy -1,4- naphthoquinones, 2,3- diphenyl maleic anhydride, 7- hydroxyl -4- fluoroform basic note
Legumin, long Luo Liding, phenanthridines, 1- pyrene formaldehyde.
9. electrophoretic display device (EPD) as claimed in claim 5, which is characterized in that the preparation method of the discoloration electrophoresis particle,
Include the following steps: that (1) prepares the predecessor of the metal oxide and the aqueous solution of dehydrated alcohol, obtains solution A；(2) match
The predecessor of the embedded photoluminescent material and the aqueous solution of dehydrated alcohol are made, solution B is obtained；(3) solution A and solution are mixed
B, reaction obtain gel C；(4) gel C is dried, obtains shot-like particle D；(5) it mixes the shot-like particle D and siloxanes is coupled
Agent, reaction obtain the discoloration electrophoresis particle.
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| CN109254469A (en) * | 2018-09-30 | 2019-01-22 | 广州奥翼材料与器件研究院有限公司 | A kind of electrophoretic display device (EPD) |
| CN109976063A (en) * | 2019-03-15 | 2019-07-05 | 广州奥翼电子科技股份有限公司 | A kind of electrophoresis showed micro unit |
| CN109917599A (en) * | 2019-03-15 | 2019-06-21 | 广州奥翼电子科技股份有限公司 | A kind of electrophoresis disclosing solution and preparation method thereof and electrophoretic display device (EPD) |
| CN110016331B (en) * | 2019-03-15 | 2022-12-09 | 广州奥翼电子科技股份有限公司 | Preparation method of exogenous excitation color-changeable electrophoretic particles and electrophoretic display microcell |
| CN110095917B (en) * | 2019-03-15 | 2022-10-18 | 广州奥翼电子科技股份有限公司 | Double-mode electrophoretic display |
| CN110058473A (en) * | 2019-03-15 | 2019-07-26 | 广州奥翼电子科技股份有限公司 | A kind of bimodulus electrophoretic display device (EPD) |
| CN110441973B (en) * | 2019-08-16 | 2024-02-13 | 京东方科技集团股份有限公司 | Display panel, control method thereof and electronic paper display device |
| CN112063201A (en) * | 2020-09-20 | 2020-12-11 | 奈蓝(上海)新材料科技有限公司 | Preparation method of blue composite material copper phthalocyanine coated cobalt blue |
| CN113835277A (en) * | 2021-10-09 | 2021-12-24 | 珠海读书郎软件科技有限公司 | Special color electronic ink screen and color developing method |
| CN113744697A (en) * | 2021-10-09 | 2021-12-03 | 珠海读书郎软件科技有限公司 | Special color ink screen and color developing method |
| CN114181694B (en) * | 2021-12-10 | 2023-06-02 | 中山大学 | Red fluorescent electrophoresis particle for electronic paper and preparation method and application thereof |
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