Hand-writable polymer dispersed liquid crystal board set with high resistance layer of crosslinking polymer adjacent conductive layer
First Claim
1. A liquid crystal display device of externally charging type comprising:
- a conductive layer;
a transparent high-electric resistance layer of a crosslinking polymer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90%;
a liquid crystal-dispersed polymer layer in which liquid crystal is finely dispersed in a polymer matrix, said layer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90%; and
a transparent insulator layer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90% wherein all of said layers are successively layered in the order presented.
3 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal display device of externally charging type, including a screen from the outside of which display and erasing operations can be repeatedly performed simply, and having an excellent memory retention performance of the recorded image and durability. Also, a hand-writable liquid crystal board set being excellent in operativity, performances, safety, including the above liquid crystal display device as a liquid crystal board. The liquid crystal display device includes a layered structure comprising, in the following order: a conductive layer; a transparent high-electric resistance layer having a volume resistivity of 1013 Ω•cm or more in a 20° C. air at a relative humidity of 90%; a liquid crystal-dispersed polymer layer which has a volume resistivity of 1013 Ω•cm or more in a 20° C. air at a relative humidity of 90%; and a transparent insulator layer. The hand-writable liquid crystal board set comprises:
(A) a board of the above liquid crystal display device,
(B) display means for displaying recording images onto the board surface, and erasing means for erasing the recorded images; and
(C) a power source for generating a surface potential between the surface of the liquid crystal board and the conductive layer by the display means;
wherein the display means employs a writing member electrically connected to one terminal of the power source which is connected at the other terminal to the conductive layer; and the erasing means employs an erasing member electrically connected to the conductive layer.
70 Citations
40 Claims
-
1. A liquid crystal display device of externally charging type comprising:
-
a conductive layer; a transparent high-electric resistance layer of a crosslinking polymer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90%;a liquid crystal-dispersed polymer layer in which liquid crystal is finely dispersed in a polymer matrix, said layer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90%; anda transparent insulator layer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90% wherein all of said layers are successively layered in the order presented. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A hand-writable liquid crystal board set comprising:
-
(A) a liquid crystal board of the externally charging type, said liquid crystal board comprising;
a conductive layer;
a transparent high-electric resistance layer of a cross-linking polymer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90%;
a liquid crystal-dispersed polymer layer in which liquid crystal is finely dispersed in a polymer matrix, said liquid crystal-dispersed polymer layer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90%; and
a transparent insulator layer having a volume resistivity of 1013 Ω
•
cm or more in 20°
C. air at a relative humidity of 90%, wherein all of said layers are successively layered in the order presented;(B) display means for displaying at least one recorded image onto a surface of said liquid crystal board; (C) erasing means for erasing said recorded image, said erasing means having an erasing member electrically connected to said conductive layer; (D) a power source for generating a surface potential between the surface of said liquid crystal board and said conductive layer; and (E) a writing member electrically connected to one terminal of said power source, said power source having another terminal connected to said conductive layer. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
Specification