CIRCULAR POLARIZING SHEET AND OPTICAL LAMINATE

WIPO Patent Application WO/2021/187099

A1

The present invention provides a circular polarizing sheet, and an optical laminate and display device provided with the circular polarizing sheet, said circular polarizing sheet being able to suppress differences in the hue of reflected light when viewed from an oblique direction compared to when viewed from the front, even after being exposed to flexion in a display device such as a flexible display. The circular polarizing sheet comprises, in the following order, an optical layer that includes at least a linear polarization layer, a first bonding layer, a first phase difference layer, a second bonding layer, and a second phase difference layer. The first phase difference layer includes a first liquid crystal layer, which is a cured layer of a polymerizable liquid crystal compound. If the modulus of elasticity at a temperature of 25°C of the first bonding layer and the second bonding layer is respectively G'1 [kPa] and G'2 [kPa], and the thickness of the first bonding layer and the second bonding layer is respectively d1 [μm] and d2 [μm], the relationship of formula (1) is satisfied.　(1) G'1/d1 ≥ G'2/d2

JP4200123	Projection screen and projection system with it
JP2004170798	OPTICAL MODULE AND OPTICAL AMPLIFIER USING THE SAME
JP2003302532	POLARIZING PLATE AND METHOD FOR MANUFACTURING THE SAME

JANG JU-YEUL (KR)
KIM DONGHWI (KR)
KIM EUNYOUNG (KR)

PCT/JP2021/008086

September 23, 2021

March 03, 2021

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SUMITOMO CHEMICAL CO (JP)

G02B5/30; B32B7/023; H01L27/32; H01L51/50; H05B33/02

WO2019022156A1	2019-01-31
WO2019216076A1	2019-11-14
WO2019093474A1	2019-05-16

JP2019091030A	2019-06-13
JP2019091029A	2019-06-13
JP2020003520A	2020-01-09

NAKAYAMA, Tohru et al. (JP)

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