JP2013007985A5 - - Google Patents

Claims (22)

A first substrate and a second substrate disposed opposite to each other;
A partition wall disposed between the first substrate and the second substrate and having a plurality of cells;
An electrophoretic layer comprising an electrophoretic material disposed in the plurality of cells;
A first electrode provided on the electrophoretic layer side surface of the first substrate;
A second electrode provided on the electrophoretic layer side surface of the second substrate;
A reflection part provided in the partition,
2. The electrophoretic display device according to claim 1, wherein the partition wall is made of a transparent member at least on the display surface side of the reflecting portion. The electrophoretic display device according to claim 1, wherein the reflection unit is provided corresponding to each of the plurality of cells.   The electrophoretic display device according to claim 1, wherein the transparent member has substantially the same refractive index as the electrophoretic material.   The electrophoretic display device according to claim 3, wherein the electrophoretic material includes a dispersion medium and electrophoretic particles.   The electrophoretic display device according to claim 4, wherein the dispersion medium or the electrophoretic particles have substantially the same refractive index as the transparent member.   The height h from the first substrate to the tip of the reflecting portion is within a range of d / 2 ≦ h ≦ d with respect to the cell gap d. The electrophoretic display device according to item.   The electrophoretic display device according to claim 1, wherein the reflection unit includes a scattering surface that scatters light in the cell.   The electrophoretic display device according to any one of claims 1 to 6, wherein the reflecting portion is configured by an optical member provided in the partition wall.   9. The electricity according to claim 8, wherein the plurality of optical members are dispersed in the partition wall along a direction inclined at a predetermined angle toward the cell side with respect to a normal line direction perpendicular to the substrate surface. Electrophoretic display device.   The electrophoretic display according to claim 1, wherein the reflection portion has an inclined surface that is inclined at a predetermined angle toward the cell side with respect to a normal direction perpendicular to the substrate surface. apparatus.   The electrophoretic display device according to claim 10, wherein an inclination angle of the inclined surface is in a range of 30 ° ≦ θ ≦ 60 °.   The electrophoretic display device according to claim 10 or 11, wherein the reflecting portions corresponding to the plurality of cells arranged in one direction are inclined in the same direction.   The reflecting portion includes the first inclined surface that is inclined toward the one cell side adjacent through the partition wall, and the second inclined surface that is inclined toward the other cell side. The electrophoretic display device according to claim 10 or 11.   The electrophoretic display device according to claim 9, wherein the reflection portion is made of a metal film.   The partition is composed of a first partition and a second partition made of the transparent member in combination with the first partition, and the reflection is between the first partition and the second partition. The electrophoretic display device according to claim 9, wherein a portion is disposed.   The electrophoretic display device according to claim 1, wherein a white pigment is contained in the partition wall.   The electrophoretic display device according to claim 1, wherein one cell corresponds to one pixel.   6. The reflecting portion is configured by fine particles including white fine particles or metal fine particles that are embedded in the partition walls to guide light incident in the partition walls into the cells. The electrophoretic display device according to any one of the above. On the second substrate side of the partition wall, a fine particle absence region where the fine particles are not present is set,
19. The electrophoretic display device according to claim 18, wherein the height of the fine particle absence region is in a range of 1/8 to 1/2 of the height of the partition wall.   The amount of the fine particles embedded in the partition wall is in a range of 2a or more and 8a or less, where a is the amount of the fine particles that can be arranged in the partition wall in a plan view. 18. The electrophoretic display device according to 18. Forming a first partition wall partitioning a plurality of pixel regions on the first substrate, and forming the second partition wall corresponding to the first partition wall on a second substrate;
Forming a first engagement portion on an upper surface of the first partition wall portion and forming a second engagement portion corresponding to the first engagement portion on an upper surface of the second partition wall portion;
Forming a reflecting portion on at least one of the first engaging portion and the second engaging portion;
Forming a partition wall by combining the first partition wall portion and the second partition wall portion so that the first engagement portion and the second engagement portion face each other;
Bonding the partition on the first substrate;
Filling an electrophoretic material into a cell surrounded by at least the partition and the first substrate;
And a step of bonding a second substrate on the first substrate through the partition wall. A method for manufacturing an electrophoretic display device. The first engagement portion has a convex shape and the second engagement portion has a concave shape,
The first partition wall portion is bonded to the first substrate with the convex first engaging portion facing away from the first substrate when the partition wall is bonded onto the first substrate. 22. A method for producing an electrophoretic display device according to item 21.