Optical laminate, manufacturing method thereof, and smart window comprising same

Abstract

The present invention relates to a variable transmittance optical stack, a manufacturing method thereof, and a smart window comprising same, the variable transmittance optical stack comprising: a first stack in which a first polarizing plate including a first functional coating layer, a first transparent conductive layer, and a first alignment film are sequentially laminated; a second laminate which faces the first stack and in which a second polarizing plate including a second functional coating layer, a second transparent conductive layer, and a second alignment film are sequentially laminated; and a liquid crystal layer disposed between the first stack and the second laminate, wherein the liquid crystal layer includes a ball spacer provided to form a depression part in at least one of the first alignment film and the second alignment film, the ball spacer has a diameter of 4 to 10 μm, at least one of the first transparent conductive layer and the second transparent conductive layer is formed in direct contact with one of the first polarizing plate and the second polarizing plate, the first functional coating layer and the second functional coating layer each have a Vickers hardness of 18 to 41, and the number (A) of ball spacers per unit area (1 mm2) with respect to the diameter (d; μm) of the ball spacer satisfies a predetermined relationship.

Dependencies are inferred from the claim text.