Polarizing film and image display
AssigneeNitto Denko Corporation
InventorsYouichirou Sugino, Hisashi Mihara, Kazuhiro Higashio, Seiichi Kusumoto
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Abstract
The present invention provides a polarizing film or a polarizer that has an elastic modulus of at most about 3500 N/mm2 and suppresses occurrence of warping, the polarizing film is obtained by adsorbing a dichroic material in a polyvinyl alcohol-based film 20 μm in thickness and stretching the film. The polarizing film has a transmittance of at least 43% and a polarization degree of at least 98%. A transparent protective layer is laminated on at least one surface of the polarizing film to form a polarizing plate.
Claims32
A polarizing film which transmits a light having a first polarization and does not transmit light having a second polarization, the polarizing film having an elastic modulus of at most about 3500 N/mm2, wherein the polarizing film comprises
- a polarizer, wherein the polarizer is a stretched film having a thickness of at most 20 μm, and
- a transparent protective layer laminated on at least one surface of the polarizer.
A method of making a polarizing film, comprising stretching a polymer film so that an elastic modulus of the polarizing film is at most about 2800 N/mm2, wherein the unstretched film has a thickness of at most about 50 μm.
A polarizing film which transmits a light having a first polarization and does not transmit light having a second polarization, the polarizing film having an elastic modulus of at most about 3500 N/mm2, and a transmittance of at least 43%.
A polarizing film which transmits a light having a first polarization and does not transmit light having a second polarization, the polarizing film having an elastic modulus of at most about 3500 N/mm2, and a polarization degree of at least 98%.
A polarizing film which transmits a light having a first polarization and does not transmit light having a second polarization, the polarizing film having an elastic modulus of at most about 3500 N/mm2, wherein a dichroic material is absorbed in the stretched film, and the stretched film is prepared by stretching an unstretched film having a thickness of at most 50 μm.
Dependencies are inferred from the claim text.