Electrophoretic display apparatus and electronic device having a boundary layer between an electrode and an electrophoretic layer
View Patent ↗An electrophoretic display apparatus has an electrophoretic layer interposed between a first electrode and a second electrode each provided on the inner surface side of each of a pair of substrates and a boundary layer interposed between the first electrode and the electrophoretic layer. When the boundary layer has a thickness of T 1 and a volume resistivity of ρ 1 and the electrophoretic layer has a thickness of T 0 and a volume resistivity of ρ 0 , the thickness and the volume resistivity of the boundary layer satisfy the formula (ρ 1 /T 1 )≧1×10 13 Ω, and the thickness and the volume resistivity of the boundary layer and the electrophoretic layer satisfy the formula (ρ 1 ·T 1 )/(ρ 0 ·T 0 )≦1/9.
1. An electrophoretic display apparatus comprising:
an electrophoretic layer interposed between a first electrode and a second electrode each provided on the inner surface side of each of a pair of substrates; and
a boundary layer positioned in a boundary between the first electrode and the electrophoretic layer, wherein:
when the boundary layer has a thickness of T 1 cm and a volume resistivity of ρ 1 Ω·cm and
the electrophoretic layer has a thickness of T 0 cm and a volume resistivity of ρ 0 Ω·cm,
the thickness and the volume resistivity of the boundary layer satisfy the following formula:
(ρ 1 /T 1 )≧1×10 13 Ω;
the thickness and the volume resistivity of the boundary layer and the electrophoretic layer satisfy the following formula:
(ρ 1 ·T 1 )/(ρ 0 ·T 0 )≦1/9; and
the thickness and the volume resistivity of the electrophoretic layer satisfy the following formula:
(ρ 0 ·T 0 )≧1×10 9 Ω·cm 2 .
2. An electrophoretic display apparatus comprising:
an electrophoretic layer interposed between a first electrode and a second electrode each provided on the inner surface side of each of a pair of substrates; and
a boundary layer positioned in a boundary between the first electrode and the electrophoretic layer, wherein:
when the boundary layer has a thickness of T 1 cm and a volume resistivity of ρ 1 Ω·cm and
the electrophoretic layer has a thickness of T 0 cm and a volume resistivity of ρ 0 Ω·cm,
the thickness and the volume resistivity of the boundary layer satisfy the following formula:
(ρ 1 /T 1 )≧5×10 12 Ω;
the thickness and the volume resistivity of the boundary layer and the electrophoretic layer satisfy the following formula:
(ρ 1 ·T 1 )/(ρ 0 ·T 0 )≦2/3; and
the thickness and the volume resistivity of the electrophoretic layer satisfy the following formula:
(ρ 0 ·T 0 )≧1×10 8 Ω·cm 2 .
3. The electrophoretic display apparatus according to claim 1 , wherein the boundary layer is a residue of an embossed wall member that partitions a pixel region as a place where the electrophoretic layer is positioned.
4. An electronic device comprising the electrophoretic display apparatus according to claim 1 .
5. An electronic device comprising the electrophoretic display apparatus according to claim 2 .
6. An electronic device comprising the electrophoretic display apparatus according to claim 3 .
7. The electrophoretic display apparatus according to claim 2 , wherein the boundary layer is a residue of an embossed wall member that partitions a pixel region as a place where the electrophoretic layer is positioned.
8. An electronic device comprising the electrophoretic display apparatus according to claim 7 .