Linear polarizers and methods of forming a linear polarizer
AssigneeLight Polymers Holding
InventorsValeriy Kuzmin, Evgeny Morozov
Life of this patent
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Abstract
A linear polarizer layer includes a birefringent aromatic polymer, one or more cationic dyes, and optionally multi-valent cations and optionally iodide anions. Methods of making linear polarizer layer where the linear polarizer layer includes a birefringent aromatic polymer, a cationic dye, and optionally a plurality of iodine ions and optionally a plurality of multivalent cations. Methods of making linear polarizer layer where the linear polarizer layer includes a birefringent aromatic polymer, one or more cationic dyes, iodide anions, and optionally a plurality of multivalent cations. Optical articles that include a linear polarizer layer of the present disclosure.
Claims17
A linear polarizer comprising:
- a linear polarizer layer, wherein the linear polarizer layer is a polymeric layer comprising a birefringent aromatic polymer, wherein the birefringent aromatic polymer is an anionic birefringent polymer, and a cationic dye selected from the group consisting of dye (C), dye (D), dye (E), dye (F), dye (G), dye (H), dye (K), and dye (L);
- and
- a substrate.
A method for forming a linear polarizer comprising:
- shear-coating a liquid crystal solution on a substrate giving a polymeric coating layer, the liquid crystal solution comprising an anionic birefringent polymer and at least one cationic dye selected from the group consisting of dye (C), dye (D), dye (E), dye (F), dye (G), dye (H), dye (K), and dye (L).
An optical article comprising:
- an optical retarder layer that has a thickness of 3.0 micrometers or less, comprising a first birefringent aromatic polymer, the first birefringent aromatic polymer being generally aligned along a first alignment direction;
- a linear polarizer layer that has a thickness of 3.0 micrometers or less, comprising a second birefringent aromatic polymer and at least one cationic dye selected from the group consisting of dye (C), dye (D), dye (E), dye (F), dye (G), dye (H), dye (K), and dye (L), the second birefringent aromatic polymer being aligned along a second alignment direction;
- and
- an intermediate layer between the linear polarizer layer and the optical retarder layer to limit ion diffusion between the linear polarizer layer and the optical retarder layer, wherein an angle between the first alignment direction and the second alignment direction is 40° to 50°.
Dependencies are inferred from the claim text.