Electrophoretic display
View Patent ↗An electrophoretic display utilizing a phenomenon of electrophoresis is provided. The electrophoretic display includes an lower electrode located on an under layer, an lower electrode protection layer formed on the lower electrode, a plurality of microcapsules located on the lower electrode protection layer, coated or encapsulated in a micro size and not operating in an electric field, a particle and/or a fluid included within the microcapsule and having a single visual color, a charged particle existed among the plurality of microcapsules, having different visual colors, operating according to an electric field and suspended in a dielectric fluid, and an upper electrode protection layer and an upper electrode located on the plurality of microcapsule in sequential order. Accordingly, a reliable electrophoretic display with one color or natural colors is achieved.
1. An electrophoretic display comprising:
a lower electrode located on an under layer;
a lower electrode protection layer formed on the lower electrode;
a plurality of microcapsules located on the lower electrode protection layer, the microcapsules being coated or encapsulated;
at least one of a particle and a fluid included within each of the plurality of microcapsules and having a single color;
a plurality of charged particles exist outside the plurality of microcapsules, the plurality of charged particles having a different visual color than the at least one of a particle and a fluid, operating in an electric field to one of move away from and move toward the lower electrode protection layer when the electric field is applied, and suspended in a dielectric fluid; and
an upper electrode protection layer and an upper electrode located on the plurality of microcapsules in sequential order, wherein the at least one particle and the fluid included in the plurality of microcapsules do not move one of away from and move toward the lower electrode protection layer in an electric field when the electric field is applied between the lower electrode and the upper electrode.
2. The electrophoretic display of claim 1 , wherein the charged particle includes light absorbing particles.
3. The electrophoretic display of claim 1 , wherein the charged particle includes light scattering particles.
4. The electrophoretic display of claim 1 , wherein the fluid or the particle within the microcapsule includes light scattering substances.
5. The electrophoretic display of claim 1 , wherein the fluid or the particle within the microcapsule includes light absorbing substances.
6. The electrophoretic display of claim 1 , wherein the charged particle includes substances having the same specific gravity as the specific gravity of the dielectric fluid.
7. The electrophoretic display of claim 1 , wherein the lower electrode and the upper electrode form a pixel type according to a microcapsule.
8. The electrophoretic display of claim 4 , wherein the particle included in a microcapsule comprises a plurality of particles, each of which is substantially smaller than a microcapsule, and scatters visual light.
9. The electrophoretic display of claim 4 , wherein the particle included in a microcapsule is approximately the same size as a microcapsule, and scatters visual light.
10. The electrophoretic display of claim 9 , wherein a plurality of particles is further formed on the plurality of microcapsules and scatters visual light.
11. The electrophoretic display of claim 10 , wherein the plurality of particles comprises red, green and blue colors, and operate to scatter a specific color.
12. The electrophoretic display of claim 4 , wherein the fluid or the particle within a microcapsule comprises red, green, and blue colors, and operates to scatter a specific color.
13. The electrophoretic display of claim 5 , wherein the particle included in a microcapsule comprises a plurality of particles, each of which is substantially smaller than a microcapsule, and absorbs visual light.
14. The electrophoretic display of claim 5 , wherein the particle included in a microcapsule is approximately the same size as the microcapsule and absorbs visual light.
15. The electrophoretic display of claim 14 , wherein a plurality of particles is further formed on a microcapsule, and absorbs visual light.