Structured fluid compositions for electrophoretically frustrated total internal reflection displays
First Claim
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1. A structured fluid compositio1n comprising:
- (a) a low refractive index liquid;
(b) particles selected from the group consisting of light absorbing particles, and non-light absorbing or very low light absorbing particles;
wherein said non-light absorbing or very low light absorbing particles absorbing particles help to create a structured colloidal suspension, and wherein the particles interact through colloidal forces without encapsulating the fluid in isolated compartments; and
(c) at least one additive selected from the group consisting of(i) a dispersant,(ii) a charging agent,(iii) a surfactant,(iv) a flocculating agent,(v) a polymer, and(vi) combinations thereof;
wherein the particles have a sufficient number of functional groups of either acid or base, to allow the dispersant to form a tightly packed mono-layer, and wherein the dispersant has the complementary acid or basic functional group to interact with the particles surface and a molecular structure resulting in a strong interaction between the particles surface and the dispersant to inhibit agglomeration, resulting in a stable suspension that is not agglomerated having ionically charged light absorbing particles, and forming an interactive structure which inhibits motion therein.
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Abstract
A structured fluid composition comprising:
- (a) a low refractive index liquid;
- (b) particles including light absorbing charged particles such as pigments, non-light absorbing uncharged particles such as teflon, silica, alumina and combinations thereof; and
- (c) at least one additive selected from the group consisting of a dispersant, a charging agent, a surfactant, a flocculating agent, a polymer, and combination thereof;
for use in a TIR electronic display.
The inventive composition improves the long-term stability, response time and visible appearance of image displays which electrophoretically frustrate total internal reflection (TIR).
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Citations
23 Claims
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1. A structured fluid compositio1n comprising:
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(a) a low refractive index liquid; (b) particles selected from the group consisting of light absorbing particles, and non-light absorbing or very low light absorbing particles;
wherein said non-light absorbing or very low light absorbing particles absorbing particles help to create a structured colloidal suspension, and wherein the particles interact through colloidal forces without encapsulating the fluid in isolated compartments; and(c) at least one additive selected from the group consisting of (i) a dispersant, (ii) a charging agent, (iii) a surfactant, (iv) a flocculating agent, (v) a polymer, and (vi) combinations thereof; wherein the particles have a sufficient number of functional groups of either acid or base, to allow the dispersant to form a tightly packed mono-layer, and wherein the dispersant has the complementary acid or basic functional group to interact with the particles surface and a molecular structure resulting in a strong interaction between the particles surface and the dispersant to inhibit agglomeration, resulting in a stable suspension that is not agglomerated having ionically charged light absorbing particles, and forming an interactive structure which inhibits motion therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification