Materials for use in electrophoretic displays
First Claim
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1. An electrophoretic display comprising, in this order:
- a first electrode;
an electrophoretic layer comprising a plurality of discrete droplets of an internal phase in a binder, the internal phase comprising plurality of particles disposed in a fluid, the particles being capable of moving through the fluid upon application of an electric field to the medium;
a layer of a lamination adhesive; and
a second electrode;
the display further comprising a polymeric layer disposed between the electrophoretic layer and the lamination adhesive layer, the polymeric layer being substantially impermeable to the fluid.
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Abstract
An electrophoretic medium comprises an electrophoretic layer, a layer of lamination adhesive and a polymeric layer disposed between the electrophoretic layer and the lamination adhesive layer, the polymeric layer being impermeable to the fluid. A second form of electrophoretic medium has a layer of a complex of an alkali metal and a polymer in contact with the electrophoretic layer. A third form of electrophoretic medium comprises a plurality of discrete droplets of internal phase in a binder, and further comprises a salt.
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Citations
14 Claims
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1. An electrophoretic display comprising, in this order:
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a first electrode; an electrophoretic layer comprising a plurality of discrete droplets of an internal phase in a binder, the internal phase comprising plurality of particles disposed in a fluid, the particles being capable of moving through the fluid upon application of an electric field to the medium; a layer of a lamination adhesive; and a second electrode; the display further comprising a polymeric layer disposed between the electrophoretic layer and the lamination adhesive layer, the polymeric layer being substantially impermeable to the fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A front plane laminate comprising in order:
- a light-transmissive electrically-conductive layer;
a layer of a solid electrophoretic medium in electrical contact with the electrically-conductive layer, the electrophoretic medium comprising a plurality of discrete droplets of an internal phase in a binder, the internal phase comprising a plurality of particles disposed in a fluid, the particles being capable of moving through the fluid upon application of an electric field to the medium;
a polymeric layer substantially impermeable to the fluid;
an adhesive layer; and
a release sheet.
- a light-transmissive electrically-conductive layer;
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13. A double release film comprising:
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a layer of a solid electrophoretic medium comprising a plurality of discrete droplets of an internal phase in a binder, the internal phase comprising a plurality of particles disposed in a fluid, the particles being capable of moving through the fluid upon application of an electric field to the medium, the layer of solid electrophoretic medium having first and second surfaces on opposed sides thereof; a first adhesive layer on the first surface of the layer of solid electrophoretic medium; a release sheet disposed on the opposed side of the first adhesive layer from the layer of solid electrophoretic medium; a second adhesive layer on the second surface of the layer of solid electrophoretic medium; and a polymeric layer substantially impermeable to the fluid disposed between the solid electrophoretic medium and one of the first and second adhesive layers.
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14. An inverted front plane laminate for use in forming an electrophoretic display, the inverted front plane laminate comprising, in order:
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at least one of a light-transmissive protective layer and a light-transmissive electrically-conductive layer; an adhesive layer; a polymeric layer; a layer of a solid electrophoretic medium a plurality of discrete droplets of an internal phase in a binder, the internal phase comprising a plurality of particles disposed in a fluid, the particles being capable of moving through the fluid upon application of an electric field to the medium; and a release sheet, wherein the polymeric layer is substantially impermeable to the fluid.
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Specification