CN106520111A - Color-changing electrophoretic particle and preparation method thereof and electrophoretic display - Google Patents
Color-changing electrophoretic particle and preparation method thereof and electrophoretic display Download PDFInfo
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- CN106520111A CN106520111A CN201611132764.1A CN201611132764A CN106520111A CN 106520111 A CN106520111 A CN 106520111A CN 201611132764 A CN201611132764 A CN 201611132764A CN 106520111 A CN106520111 A CN 106520111A
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
- C09K9/02—Organic tenebrescent materials
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- G—PHYSICS
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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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- 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
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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 invention relates to a color-changing electrophoretic particle and a preparation method thereof and an electrophoretic display. The color-changing electrophoretic particle comprises a base body and a photoluminescent material, a metallic oxide material is adopted as the base body, and the photoluminescent material is arranged on the exterior of the base body in a cladding mode; the photoluminescent material presents a color different from that of the base body under irradiation of an excitation light source within a preset wave band range and is colorless and transparent or presents the color the same as that of the base body without irradiation of the excitation light source, and the color-changing electrophoretic particle carries charges. Accordingly, by additionally arranging the photoluminescent material on the electrophoretic particle, the electrophoretic display can display colorful contents.
Description
Technical field
The invention belongs to electrophoretic display apparatus technical field, and in particular to a kind of discoloration electrophoresis particle and preparation method thereof and electricity
Phoretic display.
Background technology
Electrophoretic display is a kind of equally thin, the soft and erasable display of sensitive paper, in recent years in billboard and price
Increasingly it is widely applied on board.Existing electrophoretic display can only substantially manifest black-and-white two color, and this causes which to apply
It is very limited.
The content of the invention
Based on the deficiencies in the prior art, the technical problem to be solved in the invention is to provide a kind of change that can show colour
Color electrophoresis particle and preparation method thereof and electrophoretic display.
On the one hand the embodiment of the present invention provides a kind of discoloration electrophoresis particle, and which includes matrix and embedded photoluminescent material, 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 colours different from the color of described matrix are presented under the irradiation of the excitation source of standing wave segment limit, and the embedded photoluminescent material exists
The color identical color of water white transparency or presentation and described matrix, the discoloration electrophoresis under irradiation without the excitation source
Particle carries electric charge.
Preferably, the metal-oxide includes one or more of following material：Titanium white, Griffith's zinc white., 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 one or more of following material：Yittrium oxide, lanthana, oxidation
Cerium, praseodymium oxide, Dineodymium trioxide, Disamarium trioxide, europium oxide, Gadolinia., terbia. Diterbium trioxide, dysprosia, holmia, Erbia, ytterbium oxide, oxidation
Lutecium, Scia, Dithulium trioxide；The organic luminescent compounds include one or more of following material：Acrylic acid -9- anthracene methyl ester,
Methacrylic acid -9- anthracene methyl ester, ethidium bromide-N, N`- bis-dimethylsilyl-acetamide, fluorescein-O- acrylate, 2- naphthyl acrylate,
N- (1- naphthyls) ethylendiamine dihydrochloride, 7- [4- (trifluoromethyl) coumarin] acrylamide, 9- vinyl anthracenes, polyacrylic acid-
9- anthracene methyl ester, poly- (3,3 ', 4,4 '-benzophenone tetracarboxylic dianhydride-ALT-3,6- proflavin Hemisulphates), poly- (fluorescence
Plain O- acrylate), poly- [(methyl methacrylate)-CO- methacryloxy fluoresceins], poly- (2- naphthyl acrylic acid
Ester), poly- [N- (1- naphthyls)-N phenyl acrylamide], poly- (pyromellitic acid anhydride-CO- thionines), poly- (2- vinyl naphthalenes),
CuPc, dichloro three (1,10- phenanthrolines) ruthenium (II) hydrate, 8-hydroxyquinoline mantoquita, four (2- methyl -8-hydroxyquinoline) boron
Double (the 2- ammonia of lithium, 2,3- dichloride naphthalene Tin Phthalocyanines, three (8-hydroxyquinoline)-erbiums, 8-hydroxyquinoline aluminum, benzo [k] fluoranthene, 1,2-
Phenoxyl)-ethane-N, N, N ', N '-tetraacethyl, 2- tert-butyl group anthraquinones, 3,8- diaminourea -6- phenylphenanthridineands, 5,8- dihydroxies
Base -1,4- naphthoquinone, 2,3- diphenyl maleic anhydrides, 7- hydroxyl -4- trifluoromethyl coumarins, long Luo Liding, phenanthridines, 1- pyrene first
Aldehyde.
Preferably, the excitation source of the predetermined band scope is ultraviolet light or infrared light.
Preferably, the embedded photoluminescent material is coated on the base by grafting, blending, coprecipitation or sol-gal process
External body.
On the other hand the embodiment of the present invention provides a kind of method of the discoloration electrophoresis particle prepared described in any of the above-described, its
Comprise the steps：(1) aqueous solution of the predecessor and dehydrated alcohol of the metal-oxide is prepared, solution A is obtained；(2) match somebody with somebody
The aqueous solution of the predecessor and dehydrated alcohol of the embedded photoluminescent material is 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) mix the shot-like particle D to be coupled with siloxanes
Agent, reaction obtain the discoloration electrophoresis particle.
Preferably, also including step (6)：By discoloration electrophoresis particle and the high polymer monomer with double bond obtained by step (5)
Reaction.
Preferably, the metal-oxide is titanium dioxide, and the predecessor of the metal-oxide is tetrabutyl titanate, institute
It is yittrium oxide to state embedded photoluminescent material, and the predecessor of the embedded photoluminescent material is yttrium acid bismuth.
The embodiment of the present invention also provide it is a kind of prepare described in any of the above-described discoloration electrophoresis particle method, it include as
Lower step：(1) embedded photoluminescent material and aqueous acid is prepared, obtains solution E；(2) add the molten of second alcohol and water to solution E
Liquid, obtains solution F；(3) add Polyethylene Glycol to solution F, obtain gel G；(4) add the metal-oxide to gel G, instead
Suspension H should be obtained；(5) the suspension H is dried, the product for obtaining is mixed with silicone coupling agents, reaction obtains described
Discoloration electrophoresis particle.
Preferably, also including step (6)：By discoloration electrophoresis particle and the high polymer monomer with double bond obtained by step (5)
Reaction.
Embodiment of the present invention another further aspect provides a kind of electrophoretic display, and which includes stacking gradually the saturating of connection from outside to inside
Bright header board, electrophoretic display layer and backboard, the transparent front plate and backboard are connected by circuit, in the electrophoretic display layer two
End applies the signal of telecommunication, and the electrophoretic display layer includes multiple electrophoresis showed micro units, bag in each described electrophoresis showed micro unit
Electrophoresis liquid and at least one discoloration electrophoresis particle as described in above-mentioned any one is included, the discoloration electrophoresis particle is suspended in the electricity
In swimming liquid, the discoloration electrophoresis particle is electrically charged, and in the electricity under the driving of the transparent front plate and the signal of telecommunication of backboard
Move in swimming liquid.
Preferably, the electrophoretic display also includes excitation source and light guide plate, and the excitation source is located at described transparent
The side of header board, the light guide plate cover the outside of the transparent front plate, for the light directing that sends the excitation source extremely
It is incident from the transparent front plate.
Preferably, each described electrophoresis showed micro unit includes the first electrophoresis particle with the charges of different polarity and the second electrophoresis grain
Son, first electrophoresis particle is the discoloration electrophoresis particle as described in above-mentioned any one, and the matrix of first electrophoresis particle is in
White, second electrophoresis particle are in black.
Preferably, the electrophoretic display layer includes various electrophoresis showed micro units, in various electrophoresis showed micro units
Discoloration electrophoresis particle is presented different colored under the irradiation of identical excitation source.
The embodiment of the present invention allows electrophoretic display to show colour by increasing embedded photoluminescent material on electrophoresis particle
Content.
Describe the present invention below in conjunction with the accompanying drawings in detail, its part as this specification illustrates this by embodiment
The principle of invention, other aspects of the present invention, feature and its advantage will be become apparent by the detailed description.
Description of the drawings
Structural representation of Fig. 1～2 for two kinds of electrophoretic displays provided in an embodiment of the present invention.
Fig. 3～5 are the working state schematic representations of electrophoretic display provided in an embodiment of the present invention.
Specific embodiment
In order that the goal of the invention of the present invention, technical scheme and its technique effect become apparent from, below in conjunction with accompanying drawing and tool
The present invention is described in detail for body embodiment.It should be appreciated that the specific embodiment described in this specification is only
It is, in order to explain the present invention, to be not intended to limit the present invention.
Refer to Fig. 1 to Fig. 5, on the one hand the embodiment of the present invention provides a kind of electrophoretic display, it include from outside to inside according to
The transparent front plate 13 of secondary stacking connection, electrophoretic display layer 12 and backboard 11.Electrophoretic display layer 12 includes the micro- list of multiple electrophoresis showed
Unit 121, has electrophoresis liquid and the discoloration electrophoresis particle 122 being suspended in electrophoresis liquid, discoloration in each electrophoresis showed micro unit 121
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 are connected by circuit, for applying the signal of telecommunication at 12 two ends of electrophoretic display layer, make discoloration electrophoresis particle 122 under electric field action
Move in electrophoresis liquid.By controlling the number of pulses of the signal of telecommunication, can control to change colour electrophoresis particle 122 from transparent front plate 13
Distance.
When not having excitation source 30 to be radiated at the electrophoretic display layer 12 of electrophoretic display, embedded photoluminescent material water white transparency
Or present and the color identical color of matrix, the color of the electrophoresis particle 122 that now changes colour is exactly the color of matrix, and electrophoresis shows
Show color that device shows and matrix.When the excitation source 30 for having predetermined band scope is radiated on electrophoretic display layer 12,
Discoloration electrophoresis particle 122 is presented the colours different from the color of matrix under the irradiation of the excitation source 30 of predetermined band scope,
Such as red, green, blue, yellow and purple etc., the color of the electrophoresis particle 122 that now changes colour is the color of embedded photoluminescent material,
What electrophoretic display showed is also the color of embedded photoluminescent material.Wherein, the excitation source 30 of predetermined band scope can be purple
Outer light or infrared light.
Metal-oxide is the matrix ingredient of discoloration electrophoresis particle 122, and embedded photoluminescent material is that rare earth metal is aoxidized
Thing or organic luminescent compounds, embedded photoluminescent material can be coated on base by grafting, blending, coprecipitation or sol-gal process
External body.
Metal-oxide includes one or more of following material：Titanium white, Griffith's zinc white., Zinc Oxide, silicon dioxide, 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 one or more of following material：Yittrium oxide, lanthana, cerium oxide, praseodymium oxide, oxygen
Change neodymium, Disamarium trioxide, europium oxide, Gadolinia., terbia. Diterbium trioxide, dysprosia, holmia, Erbia, ytterbium oxide, luteium oxide, Scia, oxygen
Change thulium.
Organic luminescent compounds include one or more of following material：Acrylic acid -9- anthracene methyl ester, methacrylic acid -9-
Anthracene methyl ester, ethidium bromide-N, N`- bis-dimethylsilyl-acetamide, fluorescein-O- acrylate, 2- naphthyl acrylate, N- (1- naphthyls) second two
Amine dihydrochloride, 7- [4- (trifluoromethyl) coumarin] acrylamide, 9- vinyl anthracenes, polyacrylic acid -9- anthracene methyl ester, it is poly- (3,
3 ', 4,4 '-benzophenone tetracarboxylic dianhydride-ALT-3,6- proflavin Hemisulphates), poly- (fluorescein O- acrylate),
Poly- [(methyl methacrylate)-CO- methacryloxy fluoresceins], poly- (2- naphthyl acrylate), poly- [N- (1- naphthalenes
Base)-N phenyl acrylamide], poly- (pyromellitic acid anhydride-CO- thionines), poly- (2- vinyl naphthalenes), CuPc, dichloro three
(1,10- phenanthrolines) ruthenium (II) hydrate, 8-hydroxyquinoline mantoquita, four (2- methyl -8-hydroxyquinoline) boron lithium, 2,3- dichlorides
Double (2- the amino-benzene oxygens)-second of naphthalene Tin Phthalocyanine, three (8-hydroxyquinoline)-erbiums, 8-hydroxyquinoline aluminum, benzo [k] fluoranthene, 1,2-
Alkane-N, N, N ', N '-tetraacethyl, 2- tert-butyl group anthraquinones, 3,8- diaminourea -6- phenylphenanthridineands, 5,8- dihydroxy -1,4- naphthoquinone, 2,
3- diphenyl maleic anhydrides, 7- hydroxyl -4- trifluoromethyl coumarins, long Luo Liding, phenanthridines, 1- pyrene formaldehydes.
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, it is also possible to be not discoloration electrophoresis grain
Sub 122, the i.e. outside of the second electrophoresis particle can no embedded photoluminescent materials.Now so that matrix is white, discoloration of positively charged electricity
Swimming particle 122 and matrix illustrate electrophoresis showed of the present invention in black, as a example by the embodiment of electronegative discoloration electrophoresis particle 122
The operation principle of device.Fig. 3 is refer to, when 30 pairs of discoloration electrophoresis particles 122 of no excitation source irradiate, change colour electrophoresis particle
122 distinguish white and black, and what now electrophoretic display showed is also the pattern or word of black and white composition.Refer to
Fig. 4, when transparent front plate 13 and backboard 11 apply negative voltage pulse in electrophoretic display layer 12, the discoloration electrophoresis particle 122 of white
It is moved near the position of transparent front plate 13, the discoloration electrophoresis particle 122 of black is then moved to the position of close backboard 11, now
The light (such as ultraviolet source) of predetermined band scopes is irradiated by the discoloration electrophoresis particles 122 of excitation source 30 pairs, now white
Discoloration electrophoresis particle 122 is changed into the color after embedded photoluminescent material is excited (such as red), is embodied on electrophoretic display, in vain
The block of the discoloration aggregation of electrophoresis particle 122 of color is presented corresponding color (such as red), refer to Fig. 4, with the electricity that changes colour in figure
The different texture of swimming particle 122 is representing discoloration.Fig. 5 is refer to, when transparent front plate 13 and backboard 11 are in electrophoretic display layer
During 12 applying positive voltage pulse, the discoloration electrophoresis particle 122 of black is moved near the position of transparent front plate 13, the discoloration of white
Electrophoresis particle 122 is then moved near the position of backboard 11, now irradiates pre- by 30 pairs of discoloration electrophoresis particles 122 of excitation source
The light (such as ultraviolet light) of standing wave segment limit, the block that now the discoloration electrophoresis particle 122 of black is assembled are presented luminescence generated by light material
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 with not charged.
Refer to Fig. 2, electrophoretic display also includes excitation source 30 and light guide plate 16, excitation source 30 be arranged on it is transparent before
The side of plate 13, light guide plate 16 are covered in the outside of transparent front plate 13, for the light directing that sends excitation source 30 to from saturating
Bright header board 13 is incident.Light element 161 is provided with light guide plate 16, can be made the more uniform of incident illumination distribution, be made picture
Display effect such as form and aspect, lightness and color saturation are balanced.
In some preferred embodiments, electrophoretic display layer 12 includes various electrophoresis showed micro units 121, various electrophoresis showed
Discoloration electrophoresis particle 122 in micro unit 121 is presented different colours, namely every kind of electrophoresis under the irradiation of identical excitation source 30
Show that the discoloration electrophoresis particle 122 in micro unit 121 is different, can be specifically that embedded photoluminescent material is different, therefore swash
Under the irradiation of luminous source 30, different electrophoresis showed micro units 121 are presented different colors, so that electrophoretic display can show
Show multiple color.
Another aspect of the present invention also provides a kind of method for preparing the discoloration electrophoresis particle 122, and which comprises the steps：
(1) aqueous solution of the predecessor and dehydrated alcohol of preparing metal oxide, obtains solution A；(2) before preparing embedded photoluminescent material
The aqueous solution of thing and dehydrated alcohol is driven, solution B is obtained；(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 the electrophoresis particle 122 that changes colour.
In some preferred embodiments, in order to strengthen discoloration electrophoresis particle 122 stability and make discoloration electrophoresis particle
122 are suspended in non-polar solven, and preparation method can also include step (6)：The discoloration electrophoresis particle that step (5) is obtained
122 after free coupling agent is removed, and is then reacted with the high polymer monomer with double bond.
Now illustrated as a example by 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 (C2H5OH it is) solvent, glacial acetic acid (CH3COOH)
For chelating agen, titanium dioxide and yttrium acid bismuth complex sol is prepared.Measure 10mL butyl titanates under room temperature, be slowly dropped into 35mL without
In water-ethanol, with magnetic stirring apparatuss strong stirring 10 minutes, mix homogeneously, yellow clear solution A is formed.Then, by 4mL ice vinegar
Acid, yttrium acid bismuth and 10mL distilled water are added in another 35mL dehydrated alcohol, are stirred vigorously, are obtained solution B, instill 1-2 drop hydrochloric acid, adjust
Section pH value makes pH≤3.Then, in room-temperature water bath, be stirred vigorously and lower the solution A having been moved in constant pressure funnel be slowly dropped into into solution
In B, speed about 3mL/min is dripped.Pale yellow solution is obtained after completion of dropping, after continuing stirring half an hour, 40 DEG C of heating in water bath, 2 is little
When after obtain white gels.It is placed at 80 DEG C and dries, about 20 hours, obtains 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) in the range of 30 predetermined band of excitation source.
The present invention also provides a kind of method for preparing the discoloration electrophoresis particle 122, and which comprises the steps：(1) prepare light
Electroluminescent material and aqueous acid, obtain solution E；(2) add the solution of second alcohol and water to solution E, obtain solution F；(3) to
Solution F adds Polyethylene Glycol, obtains gel G；(4) add metal-oxide to gel G, reaction obtains suspension H；(5) will be outstanding
Supernatant liquid H is dried, and the product for obtaining is mixed with silicone coupling agents, and reaction obtains the electrophoresis particle 122 that changes colour.
Now illustrated as a example by preparing the discoloration electrophoresis particle 122 of green.Wherein, metal-oxide with titanium dioxide is
Matrix, be coated with silicon oxide outside which layer.(1) Tb will be contained3+LaPO4 be dissolved in aqueous acid, then and contain
Ethanol and water mixed solution (the certain alcohol water ratio) mixing of citric acid；(2) Polyethylene Glycol is added dropwise over, stirring was formed after 3 hours
Gel, then proceedes to stirring, while add having the titanium dioxide of coated with silica, reacts 5 hours, obtains suspension；(3)
Centrifugation suspension, then oven drying；(4) anneal 2 hours at 700 DEG C, mix products therefrom and silicone coupling agents,
Reaction obtains the electrophoresis particle 122 that changes colour.
The embodiment of the present invention allows electrophoretic display to show colour by increasing embedded photoluminescent material on electrophoresis particle
Content.
Above disclosed is only presently preferred embodiments of the present invention, can not limit certainly the right of the present invention with this
Scope, therefore the equivalent variations made according to scope of the present invention patent, still belong to the scope covered by the present invention.
Claims (15)
1. a kind of discoloration electrophoresis particle, it is characterised in that including matrix and embedded photoluminescent material, described matrix is metal-oxide
Material, the embedded photoluminescent material are coated on outside described matrix, and the embedded photoluminescent material is excited predetermined band scope
The colours different from the color of described matrix are presented under the irradiation of light source, and the embedded photoluminescent material is without the excitation source
The color identical color of the lower water white transparency of irradiation or presentation and described matrix, the discoloration electrophoresis particle carry electric charge.
2. change colour electrophoresis particle as claimed in claim 1, it is characterised in that the metal-oxide includes the one of following material
Plant or various：Titanium white, Griffith's zinc white., Zinc Oxide, silicon dioxide, iron oxide black, carbon black, chromite, chromate, silicate, chromium 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,
It is molybdate orange, ultramarine, celeste blue, emerald green, emerald green.
3. change colour electrophoresis particle as claimed in claim 1, it is characterised in that the embedded photoluminescent material is that rare earth metal is aoxidized
Thing or organic luminescent compounds.
4. change colour electrophoresis particle as claimed in claim 3, it is characterised in that the rare-earth oxide includes following material
One or more：Yittrium oxide, lanthana, cerium oxide, praseodymium oxide, Dineodymium trioxide, Disamarium trioxide, europium oxide, Gadolinia., terbia. Diterbium trioxide,
Dysprosia, holmia, Erbia, ytterbium oxide, luteium oxide, Scia, Dithulium trioxide；The organic luminescent compounds include following material
One or more of material：Acrylic acid -9- anthracene methyl ester, methacrylic acid -9- anthracene methyl ester, ethidium bromide-N, it is N`- bis-dimethylsilyl-acetamide, glimmering
Light element-O- acrylate, 2- naphthyl acrylate, N- (1- naphthyls) ethylendiamine dihydrochloride, 7- [4- (trifluoromethyl) tonkabeans
Element] acrylamide, 9- vinyl anthracenes, polyacrylic acid -9- anthracene methyl ester, poly- (3,3 ', 4,4 '-benzophenone tetracarboxylic dianhydride-ALT-
3,6- proflavin Hemisulphates), poly- (fluorescein O- acrylate), poly- [(methyl methacrylate)-CO- metering systems
Acyloxy fluorescein], poly- (2- naphthyl acrylate), poly- [N- (1- naphthyls)-N phenyl acrylamide], poly- (Pyromellitic Acid
Dianhydride-CO- thionines), poly- (2- vinyl naphthalenes), CuPc, dichloro three (1,10- phenanthrolines) ruthenium (II) hydrate, 8- hydroxyl quinolines
Quinoline mantoquita, four (2- methyl -8-hydroxyquinoline) boron lithium, 2,3- dichloride naphthalene Tin Phthalocyanines, three (8-hydroxyquinoline)-erbiums, 8- hydroxyls
Double (the 2- amino-benzene oxygens)-ethane-N of quinoline aluminum, benzo [k] fluoranthene, 1,2-, N, N ', N '-tetraacethyl, 2- tert-butyl group anthraquinones, 3,
8- diaminourea -6- phenylphenanthridineands, 5,8- dihydroxy -1,4- naphthoquinone, 2,3- diphenyl maleic anhydrides, 7- hydroxyl -4- trifluoromethyls
Coumarin, long Luo Liding, phenanthridines, 1- pyrene formaldehydes.
5. change colour electrophoresis particle as claimed in claim 1, it is characterised in that the excitation source of the predetermined band scope is purple
Outer light or infrared light.
6. discoloration electrophoresis particle as claimed in claim 1, it is characterised in that the embedded photoluminescent material by grafting, blending,
Coprecipitation or sol-gal process are coated on outside described matrix.
7. it is a kind of as described in any one of claim 1～6 discoloration electrophoresis particle preparation method, which comprises the steps：(1)
The aqueous solution of the predecessor and dehydrated alcohol of the metal-oxide is prepared, solution A is obtained；(2) prepare the luminescence generated by light material
The aqueous solution of the predecessor and dehydrated alcohol of material, obtains solution B；(3) solution A and solution B are mixed, reaction obtains gel C；
(4) gel C is dried, obtains shot-like particle D；(5) the shot-like particle D and silicone coupling agents are mixed, reaction obtains described
Discoloration electrophoresis particle.
8. the preparation method of discoloration electrophoresis particle as claimed in claim 7, it is characterised in that also including step (6)：By step
(5) the discoloration electrophoresis particle for obtaining and the reaction of the high polymer monomer with double bond.
9. the preparation method of discoloration electrophoresis particle as claimed in claim 7, it is characterised in that the metal-oxide is dioxy
Change titanium, the predecessor of the metal-oxide is tetrabutyl titanate, the embedded photoluminescent material is yittrium oxide, the luminescence generated by light
The predecessor of material is yttrium acid bismuth.
10. it is a kind of as described in any one of claim 1～6 discoloration electrophoresis particle preparation method, which comprises the steps：
(1) embedded photoluminescent material and aqueous acid is prepared, obtains solution E；(2) add the solution of second alcohol and water to solution E, obtain molten
Liquid F；(3) add Polyethylene Glycol to solution F, obtain gel G；(4) add the metal-oxide to gel G, reaction is hanged
Supernatant liquid H；(5) the suspension H is dried, the product for obtaining is mixed with silicone coupling agents, reaction obtains the discoloration electrophoresis
Particle.
The preparation method of 11. discoloration electrophoresis particles as claimed in claim 10, it is characterised in that also including step (6)：Will step
Suddenly the discoloration electrophoresis particle that (5) obtain and the reaction of the high polymer monomer with double bond.
A kind of 12. electrophoretic displays, which includes transparent front plate, electrophoretic display layer and the backboard for stacking gradually connection from outside to inside,
The transparent front plate and backboard are connected by circuit, for applying the signal of telecommunication at the electrophoretic display layer two ends, it is characterised in that
The electrophoretic display layer includes multiple electrophoresis showed micro units, including electrophoresis liquid and at least in each described electrophoresis showed micro unit
A kind of discoloration electrophoresis particle as described in any one of claim 1～6, the discoloration electrophoresis particle are suspended in the electrophoresis liquid
In, the discoloration electrophoresis particle is electrically charged, and in the electrophoresis liquid under the driving of the transparent front plate and the signal of telecommunication of backboard
Middle movement.
13. electrophoretic displays as claimed in claim 10, it is characterised in that the electrophoretic display also include excitation source and
Light guide plate, the excitation source are located at the side of the transparent front plate, and the light guide plate covers the outside of the transparent front plate, uses
In the light directing for sending the excitation source to from transparent front plate incidence.
14. electrophoretic displays as claimed in claim 10, it is characterised in that each described electrophoresis showed micro unit is included with different
First electrophoresis particle and the second electrophoresis particle of property electric charge, first electrophoresis particle is as described in any one of claim 1～6
Discoloration electrophoresis particle, the matrix of first electrophoresis particle is white, and second electrophoresis particle is in black.
15. electrophoretic displays as claimed in claim 10, it is characterised in that the electrophoretic display layer includes various electrophoresis showed
Micro unit, the discoloration electrophoresis particle in various electrophoresis showed micro units are presented different coloured silks under the irradiation of identical excitation source
Color.
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| CN201910739315.0A CN110531560A (en) | 2016-12-09 | 2016-12-09 | A kind of discoloration electrophoresis particle and preparation method thereof and electrophoretic display device (EPD) |
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| CN106520111B (en) | 2019-12-03 |
| CN110531560A (en) | 2019-12-03 |
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