Three-dimensional electrophoretic displays
View Patent ↗This invention relates to three-dimensional (3-D) electrophoretic displays comprising individually sealed cells filled with optically active electrophoretic dispersions, and more particularly to bi-stable, low-power-consumption and sealed microcup-based electrophoretic displays for high-quality three-dimensional imagery applications.
1. A 3-D display comprising an array of cells wherein said cells are filled with an optically active electrophoretic dispersion and are sealed with a sealing layer formed on top of the optically active electrophoretic dispersion from a sealing composition having a specific gravity lower than that of the optically active electrophoretic dispersion.
2. The 3-D display of claim 1 wherein said optically active electrophoretic dispersion comprises R- or L-type of CLC or charged CLC pigment particles.
3. The 3-D display of claim 1 wherein said optically active electrophoretic dispersion comprises charged pigment particles dispersed in R- or L-type of optically selective CLCs.
4. The 3-D display of claim 3 wherein said charged pigment particles are of the white color.
5. The 3-D display of claim 3 wherein said charged pigment particles are of the black color.
6. The 3-D display of claim 3 wherein said R- or L-type of optically selective CLCs are of the red, blue or green color.
7. The 3-D display of claim 1 wherein said optically active electrophoretic dispersion comprises charged R- or L-type of optically selective CLC pigment particles dispersed in a dielectric solvent.
8. The 3-D display of claim 7 wherein said charged R- or L-type of optically selective CLC pigment particles are of the red, green or blue color.
9. The 3-D display of claim 7 wherein said dielectric solvent is colored.
10. The 3-D display of claim 9 wherein said dielectric solvent is black.
11. A 3-D display comprising
a) an array of cells of well-defined shape, size and aspect ratio, and said cells are filled with an electrophoretic dispersion comprising charged pigment particles dispersed in a dielectric solvent and sealed with a sealing layer formed on top of the electrophoretic dispersion from a sealing composition having a specific gravity lower than that of the electrophoretic dispersion; and
b) optically selective R- or L-type of CLC color filters.
12. The 3-D display of claim 1 which has an up-down, in-plane or dual switching mode.
13. The 3-D display of claim 11 which has an up-down, in-plane or dual switching mode.
14. The 3-D display of claim 1 wherein said sealing composition is a radiation curable composition.
15. The 3-D display of claim 1 wherein said sealing composition is a heat or moisture curable composition.
16. The 3-D display of claim 11 wherein said sealing composition is a radiation curable composition.
17. The 3-D display of claim 11 wherein said sealing composition is a heat or moisture curable composition.