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Ink for electrowetting device and electrowetting device using the same
US9279908B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9279908-B2 |
| Application number | US-201314364423-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 25, 2013 |
| Priority date | Jan 25, 2012 |
| Publication date | Mar 8, 2016 |
| Grant date | Mar 8, 2016 |
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Abstract
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The present invention relates to an ink for an electrowetting element comprising colorant particles and a solvent, wherein the colorant particles have a specific gravity of 2 or less and an average particle diameter of 20 to 300 nm, and wherein the content of the colorant particles in the ink is 5 to 50% by mass.
First claim
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The invention claimed is: 1. An ink for an electrowetting element comprising colorant particles and a solvent, wherein the colorant particles have a specific gravity of 2 or less and an average particle diameter of 20 to 300 nm, wherein the colorant particles are black particles, and wherein the content of the colorant particles in the ink is 5 to 50% by mass. 2. The ink for an electrowetting element according to claim 1 , wherein the average particle diameter of the colorant particles is 60 to 120 nm. 3. The ink for an electrowetting element according to claim 1 , wherein the solubility parameter of the solvent is 9 or less. 4. The ink for an electrowetting element according to claim 1 , wherein the colorant particles have hydrophobized surfaces. 5. The ink for an electrowetting element according to claim 1 , wherein the colorant particles comprise a π-conjugated compound. 6. An electrowetting device using the ink for an electrowetting device according to claim 1 . 7. An electrowetting device comprising a high energy liquid as a first liquid material and a low energy liquid as a second liquid material which are immiscible with each other, the second liquid material being the ink for an electrowetting element according to claim 1 , wherein the first liquid material and the second liquid material are accommodated in a cell formed between a first substrate and a second substrate which are positioned opposite to each other. 8. The electrowetting device according to claim 7 , wherein the solubility parameter of the high energy liquid is 14 or more, and the solubility parameter of the low energy liquid is 9 or less.
Assignees
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Classifications
containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title
- G02B26/005Primary
based on electrowetting · CPC title
characterised by the pigment · CPC title
- G02B1/06Primary
made of fluids in transparent cells · CPC title
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- What does patent US9279908B2 cover?
- The present invention relates to an ink for an electrowetting element comprising colorant particles and a solvent, wherein the colorant particles have a specific gravity of 2 or less and an average particle diameter of 20 to 300 nm, and wherein the content of the colorant particles in the ink is 5 to 50% by mass.
- Who is the assignee on this patent?
- Sekisui Chemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B26/005. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 08 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).