US6017584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-color electrophoretic displays and materials for making the same
Assignee: E Ink Corp
•
Filing: 1998-08-27
•
Granted: 2000-01-25
•
Expires: 2018-08-27
Abstract
Abstract Disclosed herein are novel electrophoretic displays and materials useful in fabricating such displays. In particular, novel encapsulated displays are disclosed. Particles encapsulated therein are dispersed within a suspending, or electrophoretic, fluid. This fluid may be a mixture of two or more fluids or may be a single fluid. The displays may further comprise particles dispersed in a suspending fluid, wherein the particles contain a liquid. In either case, the suspending fluid may have a density or refractive index substantially matched to that of the particles dispersed therein. Finally, also disclosed herein are electro-osmotic displays. These displays comprise at least one capsule containing either a cellulosic or gel-like internal phase and a liquid phase, or containing two or more immiscible fluids. Application of electric fields to any of the electrophoretic displays described herein affects an optical property of the display.
Inventors
- 👤 Jonathan D. Albert
- 👤 Barrett Comiskey
- 👤 Joseph M. Jacobson
- 👤 Libing Zhang
- 👤 Andrew Loxley
- 👤 Robert Feeney
- 👤 Paul Drzaic
- 👤 Ian Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:10
CPC Classifications
B; B41; B41J; B41J3/00; B41J3/407; B41J3/4076; B82; B82Y; B82Y20/00; C; C09; C09D; C09D11/00; C09D11/30; C09D11/50; G; G02; G02B; G02B26/00; G02B26/02; G02B26/026; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G02F1/1675; G02F1/16757; G04; G04B; G04B47/00; G06; G06F; G06F15/00; G06F15/02; G06F15/025; G06F15/0283; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07701; G06K19/07703; G09; G09F; G09F9/00; G09F9/30; G09F9/302; G09F9/37; G09F9/372; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3433; G09G3/344; H; H10; H10K; H10K19/00; G02F1/13; G02F1/133; G02F1/1333; G02F1/133305; G02F1/13336; G02F1/1334; G02F2202/00; G02F2202/12; G02F2202/28; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/0267; G09G2310/0275; G09G3/22; G09G3/30; G09G3/36; G09G3/3611; G09G3/3674; G09G3/3685; G09G3/38; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/097; H05K3/00; H05K3/10; H05K3/105; H05K3/12; H05K3/1241; H10K10/00; H10K10/40; H10K10/46; H10K10/462; H10K2102/00; H10K2102/301; H10K2102/311; H10K59/00; H10K59/10; H10K59/17; H10K85/00; H10K85/30; H10K85/60; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
45 words
A multi-color, encapsulated electrophoretic display, comprising: at least three species of particles, the particles having substantially non-overlapping electrophoretic mobilities, wherein the multi-color display predominately displays one of the species of particles in response to a sequence of electrical pulses controlled in both time and amplitude.
Claim 2
Dependent Claim
45 words
A multi-color, encapsulated electrophoretic display, comprising: at least three species of particles, the particles having substantially non-overlapping electrophoretic mobilities, wherein the multi-color display predominately displays one of the species of particles in response to a sequence of electrical pulses controlled in both time and amplitude.
Claim 3
Dependent Claim
22 words
The display of claim 1, wherein said display comprises a capsule in a binder encapsulating said at least three species of particles.
Claim 4
Dependent Claim
19 words
The display of claim 1, wherein said at least three species of particles comprises magenta, cyan, and yellow particles.
Claim 5
Dependent Claim
25 words
The display of claim 1, further comprising suspending fluid having a density substantially matched to the density of said at least three species of particles.
Claim 6
Dependent Claim
13 words
The display of claim 4, wherein said suspending fluid is a halogenated hydrocarbon.
Claim 7
Dependent Claim
11 words
The display of claim 5, wherein said suspending fluid is tetrachloroethylene.
Claim 8
Dependent Claim
12 words
The display of claim 5, wherein said suspending fluid is poly(chlorotrifluoroethylene) polymer.
Claim 9
Dependent Claim
19 words
The display of claim 7, wherein said polymer has a degree of polymerization from about 2 to about 10.
Claim 10
Dependent Claim
17 words
The display of claim 4, wherein said suspending fluid comprises a mixture of two or more fluids.
Claim 11
Dependent Claim
29 words
The display of claim 4, further comprising an oil-soluble dye the said suspending fluid, said dye being selected from the group consisting of anthraquinone, azo, and triphenylmethane type dyes.
Claim 12
Dependent Claim
13 words
The display of claim 4, further comprising a surfactant in said suspending fluid.
Claim 13
Dependent Claim
11 words
The display of claim 11, wherein said surfactant is sodium dodecylsulfate.
Claim 14
Dependent Claim
47 words
The display of claim 2, wherein said binder is selected from the group consisting of water-soluble polymers, water-dispersed polymers, oil-soluble polymers, thermoset polymers, thermoplastic polymers, uv-cured polymers, radiation-cured polymers, gelatin arabic, gum arabic, polyurethanes, polyamides, urea formaldehyde resin, melamine formaldehyde resin, cellulose, cellulose derivatives, polyvinylacetates, and polyvinylalcohol.
Claim 15
Dependent Claim
27 words
The display of claim 13, wherein said binder further comprises an additive selected from the group consisting of organic surfactants, organic salts, organic particles, and organic pigments.
Claim 16
Dependent Claim
15 words
The display of claim 1, wherein said at least three species of particles are titania.
Claim 17
Dependent Claim
17 words
The display of claim 1, wherein said at least three species of particles are metal oxide-coated titania.
Claim 18
Dependent Claim
21 words
The display of claim 16, wherein said metal oxide is selected from the group consisting of aluminum oxide and silicon oxide.
Claim 19
Dependent Claim
17 words
The display of claim 17, wherein said metal oxide-coated titania comprises two layers of metal oxide coating.
Claim 20
Dependent Claim
20 words
The display of claim 18, wherein said titania is coated with both aluminum oxide and silicon oxide in either order.
Claim 21
Dependent Claim
11 words
The display of claim 1, further comprising a charge control agent.
Claim 22
Dependent Claim
12 words
The display of claim 20, wherein said charge control agent is polyisobutylenesuccinimide.
Claim 23
Dependent Claim
14 words
The display of claim 20, wherein said charge control agent is a metal soap.
Claim 24
Dependent Claim
12 words
The display of claim 20, wherein said charge control agent is lecithin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-24 | 2003-07-26 | 2004-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-24 | 2007-07-26 | 2008-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-24 | 2011-07-26 | 2012-01-25 | $7700.00 | Window Closed / Lapsed |