To form a brightness enhancement film of cholesteric liquid crystal, a
photopolymerizable liquid crystal is first formed on a first substrate. A
second substrate then is formed on the liquid crystal substance to form a
sandwich structure. The sandwich structure is subsequently submitted to a
lamination process that generates shear stress thereon. Finally, an
energetic irradiation including UV irradiation is performed to solidify
the layer of liquid crystal into a liquid crystal polymer film. The second
substrate then is selectively removed. The above steps are repeated until
a desired reflected wavelength range of the liquid crystal film is
obtained.
