Polarizing plate for optical laminate, optical laminate including the same, smart window, and automobile or window for building using the same

An optical laminate comprising:

• a first polarizing plate;
• a first transparent conductive layer formed on one surface of the first polarizing plate;
• a second polarizing plate opposite to the first polarizing plate;
• a second transparent conductive layer formed on one surface of the second polarizing plate and opposite to the first transparent conductive layer;
• a liquid crystal layer provided between the first transparent conductive layer and the second transparent conductive layer;
• and
• a sealant formed along an outer peripheral surface of the liquid crystal layer,
• wherein at least one of the first transparent conductive layer and the second transparent conductive layer is formed in direct contact with any one of the first polarizing plate and the second polarizing plate, and
• the first polarizing plate and the second polarizing plate comprise a first protective film and a second protective film, respectively, on surfaces on which the first transparent conductive layer and the second transparent conductive layer are not formed,
• wherein the first protective film and the second protective film each have a thickness of 100 μm to 300 μm.