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Dispersion liquid for electrophoretic display, display medium, and display device
US9348193B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9348193-B2 |
| Application number | US-201213718741-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 18, 2012 |
| Priority date | Feb 27, 2012 |
| Publication date | May 24, 2016 |
| Grant date | May 24, 2016 |
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Abstract
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There is provided a dispersion liquid for electrophoretic display, containing a dispersion medium 50 , a colored electrophoretic particle group 34 that is dispersed in the dispersion medium and migrates in the dispersion medium according to an electric field, a non-electrophoretic particle group 36 that is dispersed without migrating in the dispersion medium and has a color different from that of the electrophoretic particle group, and a compound having a neutral polar group and a hydrophobic group, which is contained in the dispersion medium in a ratio of about 0.01 to about 1 mass % based on the entire dispersion liquid.
First claim
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What is claimed is: 1. A dispersion liquid for electrophoretic display, comprising: a dispersion medium, a colored electrophoretic particle group that is dispersed in the dispersion medium and migrates in the dispersion medium according to an electric field, a non-electrophoretic particle group that is dispersed without migrating in the dispersion medium and has a color different from that of the electrophoretic particle group, and a compound having a neutral polar group and a hydrophobic group, which is contained in the dispersion medium in a ratio of about 0.01 to about 1 mass % based on the entire dispersion liquid. 2. The dispersion liquid for electrophoretic display according to claim 1 , wherein the neutral polar group is a hydroxyl group, an alkyl ether group, a weak acid group neutralized with a weak base, or a weakly basic group neutralized with a weak acid group. 3. The dispersion liquid for electrophoretic display according to claim 1 , wherein a silicone-based oil is contained as the dispersion medium and the compound having a neutral polar group and a hydrophobic group has a siloxane bond-containing group as the hydrophobic group. 4. The dispersion liquid for electrophoretic display according to claim 1 , wherein a hydrocarbon-based oil is contained as the dispersion medium and the compound having a neutral polar group and a hydrophobic group has an alkyl group as the hydrophobic group. 5. A display medium comprising: a pair of substrates disposed with spacing, at least either one of which has light transparency, and the dispersion liquid for electrophoretic display according to claim 1 , which is enclosed between the pair of substrates. 6. A display medium comprising: a pair of electrodes disposed with spacing, at least either one of which has light transparency, and a region having the dispersion liquid for electrophoretic display according to claim 1 between the pair of electrodes. 7. A display device comprising: the display medium according to claim 5 , and an electric field applying unit that applies a voltage between the pair of substrates of electrodes of the display medium. 8. A display device comprising: the display medium according to claim 6 , and an electric field applying unit that applies a voltage between the pair of electrodes of the display medium.
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Classifications
- G02F1/167Primary
by electrophoresis · CPC title
characterised by the composition or particle type · CPC title
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- What does patent US9348193B2 cover?
- There is provided a dispersion liquid for electrophoretic display, containing a dispersion medium 50 , a colored electrophoretic particle group 34 that is dispersed in the dispersion medium and migrates in the dispersion medium according to an electric field, a non-electrophoretic particle group 36 that is dispersed without migrating in the dispersion medium and has a color different from …
- Who is the assignee on this patent?
- E Ink Corp
- What technology area does this patent fall under?
- Primary CPC classification G02F1/167. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 24 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).