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Title:
POLARIZATION PLATE FOR FOLDING DISPLAY
Document Type and Number:
WIPO Patent Application WO/2020/241312
Kind Code:
A1
Abstract:
[Problem] To provide a polarization plate for a folding display for which there is no risk of distortions arising in an image displayed on the folding section after having been bent repeatedly. [Solution] The polarization plate for a folding display has a polarizer protection film comprising a polyester film layered on at least one surface of a polarizer. The polyester film satisfies the following conditions: (1) the refractive index in the bending direction is 1.590 to 1.620, (2) the refractive index in the direction of the folding portion is 1.670 to 1.700, (3) the refractive index in the thickness direction is 1.520 or lower, and (4) the density is 1.380 g/cm3 or greater. (Herein, the bending direction is a direction that is orthogonal to the folding portion when folding the polyester film.)

Inventors:
NISHIO SHOTARO (JP)
KAWAI KIWAMU (JP)
SHIMIZU AKIRA (JP)
Application Number:
PCT/JP2020/019484
Publication Date:
December 03, 2020
Filing Date:
May 15, 2020
Export Citation:
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Assignee:
TOYO BOSEKI (JP)
International Classes:
G02B5/30; B32B7/023; B32B27/36; G02F1/1335; G09F9/00; H01L27/32; H01L51/50; H05B33/02
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See also references of EP 3978966A4
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