Dispersion, microcapsule, electrophoretic device, electro-optical device, and method of forming a dispersion
View Patent ↗A method for making an electrophoretic solution includes: including two kinds of particles having different charging polarities into the electrophoretic solution; calculating a mixing ratio so that charge amounts of the two kinds of particles become approximately equal to each other on a basis of a unit volume of a dispersion medium; and mixing the two kinds of particles in each mixed quantity that satisfies the calculated mixing ratio.
1. A dispersion comprising:
a first charged particle;
a second charged particle; and
a medium;
the first charged particle having a first polarity in the medium, the second charged particle having a second polarity in the medium, and a charge amount of the first charged particle and a charge amount of the second charged particle being equal.
2. A microcapsule having the dispersion according to claim 1 .
3. An electrophoretic device having the dispersion according to claim 1 .
4. A dispersion comprising:
a medium;
a plurality of first particles, the plurality of the first particles being dispersed in the medium, each of the plurality of the first particles being charged and having a first polarity, an amount of the plurality of the first particles being represented as W 1 , one of the plurality of the first particles having a first mobility, the first mobility being represented as μl, the one of the plurality of the first particles having a first particle size, the first particle size being represented as R 1 , the one of the plurality of the first particles having a first density, the first density being represented as D 1 ; and
a plurality of second particles, the plurality of the second particles being dispersed in the medium, each of the second particles being charged and having a second polarity, an amount of the plurality of the second particles being represented as W 2 , one of the plurality of the second particles having a second mobility, the second mobility being represented as μ 2 , the one of the plurality of the second particles having a second particle size, the second particle size being represented as R 2 , the one of the plurality of the second particles having a second density, the second density being represented as D 2 ;
the W 1 and the W 2 satisfying a formula:
W
1
W
2
=
μ
2
μ1
·
R
1
R
2
·
D
1
D
2
.
5. A microcapsule having the dispersion according to claim 4 .
6. An electrophoretic device having the dispersion according to claim 4 .
7. An electro-optical device having the electrophoretic device according to claim 6 .
8. A dispersion comprising:
a medium;
a plurality of first particles, the plurality of the first particles being dispersed in the medium, each of the plurality of the first particles being charged and having a first polarity, an amount of the plurality of the first particles being represented as W 1 , one of the plurality of the first particles having a first zeta potential, the first zeta potential being represented as ζ 1 , the one of the plurality of the first particles having a first particle size, the first particle size being represented as R 1 , the one of the plurality of the first particles having a first density, the first density being represented as D 1 ; and
a plurality of second particles, the plurality of the second particles being dispersed in the medium, each of the plurality of the second particles being charged and having a second polarity, an amount of the plurality of the second particles being represented as W 2 , one of the plurality of the second particles having a second zeta potential, the second zeta potential being represented as ζ 2 , the one of the plurality of the second particles having a second particle size, the second particle size being represented as R 2 , the one of the plurality of the second particles having a second density, the second density being represented as D 2 ;
the W 1 and the W 2 satisfying a formula:
W
1
W
2
=
ξ
2
ξ1
·
R
1
R
2
·
D
1
D
2
.
9. The dispersion according to claim 8 , the relationship between the W 1 and the W 2 being satisfied with a formula 2 as below,
0.2< W 1 /W 2<5 Formula 2.
10. A microcapsule having the dispersion according to claim 9 .
11. An electrophoretic device having the dispersion according to claim 9 .
12. A microcapsule having the dispersion according to claim 8 .
13. An electrophoretic device having the dispersion according to claim 8 .
14. A method of making a dispersion, comprising:
adding a first charged particle and a second charged particle to a disperse medium, the first charged particle and the second charged particle having different charging polarities,
the first charged particle having a first mixed quantity, the first mixed quantity being settled by a first mobility, a first particle size, and a first density of the first charged particle,
the second charged particle having a second mixed quantity, the second mixed quantity being settled by a second mobility, a second particle size, and a second density of the second charged particle.
15. A method of making a dispersion, comprising:
adding a plurality of first charged particles and a plurality of second charged particles to a disperse medium, the first charged particle and the second charged particle having different charging polarities,
the first charged particle having a first zeta potential being represented as ζ 1 , a first particle size being represented as R 1 , a first density being represented as D 1 , and a first mixed quantity being represented as W 1 ,
the second charged particle having a second zeta potential being represented as ζ 2 , a second particle size being represented as R 2 , a second density being represented as D 2 , a second mixed quantity being represented as W 2 ,
a relationship between the W 1 and W 2 being settled by a formula 1 as below,
Formula
1
:
W
1
W
2
=
ζ
2
ζ1
·
R
1
R
2
·
D
1
D
2
.
16. The method according to claim 15 , the relationship between the W 1 and the W 2 being satisfied with a formula 2 as below,
0.2< W 1 /W 2<5 Formula 2.
17. A dispersion comprising:
a medium;
a plurality of first particles, the plurality of the first particles being dispersed in the medium, each of the first particles being charged and having a first polarity; and
a plurality of second particles, the plurality of the second particles being dispersed in the medium, each of the second particles being charged having a second polarity;
an absolute value of a first charge amount of the plurality of first particles being approximately equal to an absolute value of a second charge amount of the plurality of second particles.
18. A dispersion comprising:
a medium;
a plurality of first particles, the plurality of the first particles being dispersed in the medium, each of the first particles being charged and having a first polarity, an amount of the plurality of the first particles being represented as W 1 ;
a plurality of second particles, the plurality of the second particles being dispersed in the medium, each of the second particles being charged and having a second polarity, an amount of the plurality of the second particles being represented as W 2 ;
the W 1 and the W 2 satisfying a formula:
0.2< W 1 /W 2<5 Formula 2.