Electrophoretic display device
View Patent ↗An electrophoretic display device includes an array substrate, an opposing substrate, and an electrophoretic layer disposed between the array substrate and the opposing substrate. The array substrate includes a first base substrate having a plurality of pixel regions, and a pixel electrode having a plurality of electrode patterns disposed in each of the pixel regions. The opposing substrate includes a second base substrate positioned opposite to the first base substrate, and a common electrode disposed on a surface of the second base substrate that faces the first base substrate. The electrophoretic layer includes a plurality of polarity particles dispersed in a non-polar solvent. The common electrode includes a plurality of openings disposed in a region corresponding to each of the electrode patterns.
1. An electrophoretic display device, comprising:
an array substrate comprising a first base substrate and a pixel electrode, wherein the first base substrate comprises a plurality of pixel regions, and the pixel electrode comprises a plurality of electrode patterns disposed in each of the pixel regions;
an opposing substrate comprising a second base substrate and a common electrode, wherein the second base substrate is positioned opposite to the first base substrate, and the common electrode is disposed on a surface of the second base substrate that faces the first base substrate; and
an electrophoretic layer disposed between the array substrate and the opposing substrate, and comprising a plurality of polarity particles dispersed in a non-polar solvent,
wherein the common electrode comprises a plurality of openings disposed in a region corresponding to each of the electrode patterns, and each one of the plurality of openings is overlapped with a corresponding one of the plurality of electrode patterns,
wherein an area of each of the openings is about equal to or greater than an area of a corresponding electrode pattern.
2. The electrophoretic display device of claim 1 , wherein a distance between each of the electrode patterns and the common electrode is about equal to or less than about 5 μm in a plan view.
3. The electrophoretic display device of claim 1 , wherein the opposing substrate further comprises a protrusion disposed between the second base substrate and the common electrode.
4. The electrophoretic display device of claim 3 , wherein the protrusion separates each of the pixel regions into a plurality of electric field regions.
5. The electrophoretic display device of claim 4 , wherein each of the electric field regions corresponds to each of the electrode patterns.
6. The electrophoretic display device of claim 3 , wherein the protrusion comprises a plurality of protruding patterns disposed between adjacent electrode patterns.
7. The electrophoretic display device of claim 3 , wherein a shape of a space formed by the protrusion is one of a circle, a quadrangle, a hexagon, and an octagon.
8. The electrophoretic display device of claim 3 , wherein a height of the protrusion is about equal to or less than about 2 μm.
9. The electrophoretic display device of claim 3 , wherein the protrusion is at least one of a transparent organic material or a transparent inorganic material.
10. The electrophoretic display device of claim 1 , wherein each of the electrode patterns is conductive, and at least a portion of each of the electrode patterns absorbs light.
11. The electrophoretic display device of claim 10 , wherein each of the electrode patterns comprises:
a conductive layer disposed on the first base substrate; and
a light absorption layer disposed on the conductive layer and comprising a light-absorbing material.
12. The electrophoretic display device of claim 1 , wherein the array substrate further comprises a reflection layer disposed between the first base substrate and the pixel electrode.
13. The electrophoretic display device of claim 12 , wherein the reflection layer comprises a white photoresist.
14. The electrophoretic display device of claim 1 , wherein the polarity particles comprise particles having the same polarity and a single color.
15. The electrophoretic display device of claim 1 , wherein the polarity particles comprise at least two kinds of particles having the same polarity and different colors from each other.
16. The electrophoretic display device of claim 1 , wherein the polarity particles comprise at least two kinds of particles having different polarities and different colors from each other.
17. The electrophoretic display device of claim 1 , further comprising:
a partition wall disposed between the plurality of pixel regions.
18. The electrophoretic display device of claim 17 , wherein the partition wall comprises a light-blocking material.
19. An electrophoretic display device, comprising:
a plurality of electrode patterns disposed on a first base substrate;
a plurality of protrusions disposed on a second base substrate, wherein the second base substrate is positioned opposite to the first base substrate;
a common electrode disposed on the plurality of protrusions and the second substrate, wherein the common electrode comprises a plurality of openings formed between adjacent protrusions in a region corresponding to the plurality of electrode patterns, and the common electrode faces the plurality of electrode patterns; and
an electrophoretic layer disposed between the first and second base substrates, and comprising a plurality of polarity particles dispersed in a non-polar solvent,
wherein an area of each of the openings is about equal to or greater than an area of a corresponding electrode pattern.
20. The electrophoretic display device of claim 19 , wherein a distance between each of the electrode patterns and the common electrode is about equal to or less than about 5 μM in a plan view.
21. The electrophoretic display device of claim 19 , wherein a height of the protrusions is about equal to or less than about 2 μm.
22. The electrophoretic device of claim 19 , wherein each of the electrode patterns corresponds to a different electric field region.