Optical laminate
AssigneeSumitomo Chemical Company, Limited
InventorsShoichi OZAWA, Yosuke OTA, Daichi FUJIMOTO
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Abstract
Provided is an optical laminate which has high absorption selectivity to short-wavelength visible light having wavelengths around 400 nm and hence high light fastness and can impart better display characteristics when used for a display device. The optical laminate comprises at least one polarizing plate and at least one pressure-sensitive adhesive layer and satisfying the following formulae (1) and (2): A(400)≧0.5 (1) A(420)/A(400)≦0.3 (2) where A(400) represents the absorbance of the optical laminate at a wavelength of 400 nm in the transmission direction of the polarizing plate and A(420) represents the absorbance of the optical laminate at a wavelength of 420 nm in the transmission direction of the polarizing plate.
Claims10
An optical laminate comprising at least one polarizing plate and at least one pressure-sensitive adhesive layer and satisfying the following formulae (1) and (2):
- A(400)≧0.5 (1)
- A(420)/A(400)≦0.3 (2)
- where A(400) represents the absorbance of the optical laminate at a wavelength of 400 nm in the transmission direction of the polarizing plate and A(420) represents the absorbance of the optical laminate at a wavelength of 420 nm in the transmission direction of the polarizing plate.
Dependencies are inferred from the claim text.