Electro-optic display with controlled electrochemical reactions
US-2015015932-A1 · Jan 15, 2015 · US
Nano-particle based variable transmission devices
US9953588B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-9953588-B1 |
| Application number | US-201514668004-A |
| Country | US |
| Kind code | B1 |
| Filing date | Mar 25, 2015 |
| Priority date | Mar 25, 2014 |
| Publication date | Apr 24, 2018 |
| Grant date | Apr 24, 2018 |
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Abstract
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A variable transmission medium comprises a fluid and a plurality of nanoparticles dispersed in the fluid, wherein addition of acid to the fluid causes the nanoparticles to flocculate and form aggregates of particles that scatter light. The nanoparticles may comprise at least one metal oxide, such as titanium dioxide, zinc oxide or zirconium dioxide. The fluid may have a dielectric constant less than about 10.
First claim
Opening claim text (preview).
The invention claimed is: 1. A variable transmission medium comprising limonene and a plurality of zirconium dioxide nanoparticles dispersed in the limonene, wherein the zirconium dioxide nanoparticles and the limonene are confined within a plurality of capsules or microcells, or are present as a plurality of discrete droplets surrounded by a continuous phase comprising a polymeric material, and wherein addition of acid to the medium causes the zirconium dioxide nanoparticles to flocculate and form aggregates of particles that scatter light. 2. The variable transmission medium according to claim 1 , wherein the zirconium dioxide nanoparticles have adsorbed thereon a stabilizing material that comprises a carboxylic acid or carboxylate group attached to a chain of at least 10 carbon atoms. 3. The variable transmission medium of claim 2 , wherein the stabilizing material comprises stearic acid. 4. The variable transmission medium of claim 1 , wherein the zirconium dioxide nanoparticles are between 10 and 100 nm in diameter. 5. A variable transmission assembly comprising two light-transmissive substrates and the variable transmission medium according to claim 1 disposed between the substrates. 6. The variable transmission assembly according to claim 5 , further comprising light transmissive electrodes disposed on adjacent surfaces of the two light-transmissive substrates.
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Classifications
Gray scale · CPC title
- G09G3/344Primary
based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167) · CPC title
metallic oxides (ceramics H01B3/12) · CPC title
Micro- or nanomaterials · CPC title
Encapsulated liquid · CPC title
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- What does patent US9953588B1 cover?
- A variable transmission medium comprises a fluid and a plurality of nanoparticles dispersed in the fluid, wherein addition of acid to the fluid causes the nanoparticles to flocculate and form aggregates of particles that scatter light. The nanoparticles may comprise at least one metal oxide, such as titanium dioxide, zinc oxide or zirconium dioxide. The fluid may have a dielectric constant less…
- Who is the assignee on this patent?
- E Ink Corp
- What technology area does this patent fall under?
- Primary CPC classification G09G3/344. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 24 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).