Display device
View Patent ↗An electrophoretic display includes a lower substrate, an upper substrate, a color display layer on the lower substrate, a pixel electrode on the lower substrate, and a common electrode on the lower substrate or the upper substrate. The common electrode does not overlap the pixel electrode, and an electrophoretic active layer having a dispersion medium and electrophoretic particles is arranged between the lower substrate and the upper substrate. The electrophoretic active layer is a single-polarity electrophoretic particle system, and grayscales are generated depending on the number of electrophoretic particles arranged in a portion of the electrophoretic active layer corresponding to the pixel electrode. The position of the electrophoretic particles is controlled by the magnitude of the electric field applied between the pixel electrode and the common electrode.
1. An electrophoretic display, comprising:
a first substrate;
a second substrate facing the first substrate;
a color display layer arranged on the first substrate;
a first electrode arranged on the first substrate;
a second electrode arranged on the first substrate or the second substrate, wherein the second electrode does not overlap the first electrode;
a storage electrode arranged on the first substrate and extending substantially parallel with the second electrode, the storage electrode overlapping with the first electrode; and
an electrophoretic active layer comprising electrophoretic particles and a dispersion medium, the electrophoretic particles being arranged between the first substrate and the second substrate,
wherein the electrophoretic active layer is a single-polarity electrophoretic particle system.
2. The electrophoretic display of claim 1 , wherein the second electrode is arranged on the first substrate.
3. The electrophoretic display of claim 2 , further comprising:
a light blocking member arranged on the second substrate and disposed opposite to the second electrode.
4. The electrophoretic display of claim 1 , wherein the second electrode is arranged on the second substrate.
5. The electrophoretic display of claim 4 , wherein the second electrode comprises a light blocking material.
6. The electrophoretic display of claim 1 , further comprising:
a partition arranged between the first substrate and the second substrate and defining a moving space of the electrophoretic particles.
7. The electrophoretic display of claim 1 , further comprising:
thin film elements arranged between the first substrate and the color display layer.
8. The electrophoretic display of claim 7 , wherein the first electrode is arranged on the color display layer.
9. The electrophoretic display of claim 7 , further comprising:
an insulating layer arranged on the thin film elements,
wherein the first electrode is arranged between the insulating layer and the color display layer.
10. The electrophoretic display of claim 7 , wherein the thin film elements comprise:
a gate electrode arranged on the first substrate;
a gate insulating layer arranged on the gate electrode;
a semiconductor layer arranged on the gate insulating layer;
a source electrode arranged on the semiconductor layer; and
a drain electrode arranged on the semiconductor layer, spaced apart from the source electrode, and connected to the first electrode.
11. The electrophoretic display of claim 10 , wherein the first electrode is arranged on the same layer as the source electrode and the drain electrode.
12. The electrophoretic display of claim 10 , wherein the second electrode is arranged on the first substrate, and is on a different layer than the first electrode.
13. The electrophoretic display of claim 10 , wherein the second electrode is arranged between the first substrate and the gate insulating layer.
14. The electrophoretic display of claim 1 , wherein the electrophoretic particles represent a color selected from the group consisting of red, green, blue, yellow, magenta, cyan, black, and white.
15. The electrophoretic display of claim 1 , wherein the first electrode comprises a plurality of first branch electrodes, the second electrode comprises a plurality of second branch electrodes, and the first branch electrodes and the second branch electrodes are alternately disposed.
16. The electrophoretic display of claim 1 , wherein the color display layer represents a color selected from the group consisting of red, green, blue, yellow, magenta, cyan, black, and white.
17. An electrophoretic display, comprising:
a first substrate;
a second substrate facing the first substrate;
a reflective color filter layer arranged on the first substrate;
a first electrode arranged on the first substrate;
a second electrode arranged on the first substrate or the second substrate, wherein the second electrode does not overlap the first electrode;
a storage electrode arranged on the first substrate and extending substantially parallel with the second electrode, the storage electrode overlapping with the first electrode; and
an electrophoretic active layer comprising electrophoretic particles and a dispersion medium, the electrophoretic particles comprising a light blocking material,
wherein the electrophoretic active layer is a single-polarity electrophoretic particle system.
18. The electrophoretic display of claim 17 , further comprising:
a light blocking member arranged on the second substrate and disposed opposite to the second electrode being arranged on the first substrate.
19. The electrophoretic display of claim 17 , wherein the second electrode is arranged on the second substrate and comprises a light blocking material.