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US 2003/0151813 A1Published application
Polarizer, polarizing plate, and visual display
AssigneeNitto Denko Corporation
InventorsAkihiro Nishida, Kazuki Tsuchimoto, Seiji Kondo
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Abstract
A polarizer comprising a polyvinyl alcohol based film being dyed by iodine and treated with potassium iodide, wherein an element content ratio (K/I) of iodine (I) and potassium (K) is 0.05 through 0.24, show an effect controlling coloring and satisfying high durability under conditions of high temperature.
Claims4
A polarizer comprising a polyvinyl alcohol based film being dyed by iodine and treated with potassium iodide,
- wherein an element content ratio (K/I) of iodine (I) and potassium (K) is 0.05 through 0.24.
Dependencies are inferred from the claim text.